Metal Dome & Dome Array blog – Best Technology

What is SMD and its advantages?

Posted on October 15, 2024 by seo_li

SMD surface mount device is a technology that directly mounts electronic components on the surface of a printed circuit board (PCB). SMD covers many types of electronic components, such as resistors, capacitors, integrated circuits, diodes, transistors, etc. These components are fixed on the surface of the PCB by welding and other methods, without the need to punch holes on the PCB like traditional through-hole mounting technology.

What is a surface-mount component?

Surface mount components (SMC) are electronic components without pins or short leads, which are mounted on the surface of a printed circuit board (PCB) or other substrates by surface mount technology (SMT), and assembled by soldering by reflow soldering or dip soldering.

The main feature of surface mount components is their design without pins or short leads, which enables them to be mounted on PCBs in a high-density manner, thereby reducing the volume and weight of electronic products and improving assembly efficiency and reliability.

Surface mount components can be divided into rectangular chip components, cylindrical chip components, composite chip components, and special-shaped chip components according to their structural shape. According to functional classification, surface mount components include passive components (SMC) and active devices (SMD), etc. Passive components include resistors, capacitors, etc., while active devices include transistors, integrated circuits, etc. ?

Why is Surface Mount Technology used?

The main reasons why surface mount technology (SMT) is widely used include: the pursuit of miniaturization of electronic products, the development of integrated circuits, the demand for production automation and mass production, and the development of electronic components.

First, the trend of miniaturization of electronic products is one of the main factors driving the use of SMT. With the advancement of technology, electronic products are increasingly pursuing miniaturization and lightweight. Traditional perforated plug-in components can no longer meet this demand, and surface mount technology can integrate more functions in a limited space, thereby promoting the development of electronic products in a smaller and lighter direction?.

Secondly, the development of integrated circuits is also an important reason for the use of SMT. Integrated circuits (ICs) are widely used in modern electronic products, and these integrated circuits are usually pinless surface mount devices (SMDs) that can only be assembled by SMT.

In addition, the demand for production automation and mass production is also one of the reasons why SMT is widely adopted. The SMT assembly process is highly automated, which can significantly reduce the labor cost of mass production. Through highly automated production processes, manufacturers can produce high-quality products at low cost and high yield, meet market demand and enhance market competitiveness.

Finally, the development of electronic components also supports the use of SMT. With the diversified application of semiconductor materials and the continuous advancement of electronic technology, new components and technologies are constantly emerging, all of which require SMT to achieve efficient assembly and production.

What is the difference between SMD and SMT?

The main difference between SMD and SMT is that they refer to different objects. SMD refers to surface mount devices, while SMT refers to surface mounting technology. ?

SMD is a surface mount device, which is an electronic component manufactured using a thin film process and can be directly mounted on the surface of a printed circuit board (PCB). SMD devices have the advantages of small size, light weight, and powerful functions, and are widely used in the design and production of electronic products.

In contrast, SMT (Surface Mount Technology) is a surface mounting technology, which is a technology for directly mounting electronic components on the surface of a PCB. SMT technology can achieve high-speed, high-precision, and high-density assembly, and is widely used in high-speed circuit boards, high-density circuit boards, and multi-layer circuit boards. ?

In terms of structure, SMT technology is to paste electronic components on the surface of PCB through solder balls or adhesives, while SMD is to solder electronic components directly on the surface of PCB. Since SMD devices can be directly soldered on the surface of PCB, the steps of pad design and production in the soldering process can be omitted, which improves production efficiency and reduces costs.

In terms of application, SMT technology is mainly used in fields such as high-speed circuit boards, high-density circuit boards and multi-layer circuit boards, while SMD devices are mainly used in consumer electronics, communication equipment, computers and other fields due to their small size, light weight and powerful functions.

In the manufacturing process, SMT requires the use of special equipment for printing, mounting and testing, while SMD manufacturing requires the use of special equipment for molding, cutting, packaging and other processes. Since SMD devices can be directly soldered on the surface of PCB, special treatment of PCB is required to ensure soldering quality and reliability.

In terms of maintenance, due to the high assembly density of SMT technology, regular cleaning and inspection are required, while SMD devices have relatively less maintenance work due to their simple structure and easy maintenance, but if a failure occurs, repairing or replacing SMD devices may be more difficult and time-consuming.

What is the difference between SMD and SMC?

SMD usually refers to specific electronic devices, such as resistors, capacitors, integrated circuits, etc., which are mounted on printed circuit boards using surface mount technology.

SMC is a broader concept that covers all surface mount components, including connectors, inductors and other special components in addition to common electronic devices.

SMD emphasizes the characteristics and specifications of the individual device itself and its surface mount.

SMC emphasizes the overall surface mount type of components, which is a more general concept.

What is the advantage of SMD?

The main advantages of SMD (surface mount device) include:

Small size and light weight: SMD components are small in size and light in weight, which can significantly reduce the substrate area occupied, achieve high-density integration, and are conducive to the design of miniaturized and lightweight electronic products.

Good electrical performance: SMD components have excellent electrical performance, especially in high-frequency performance, because their short pins and short connection paths help reduce inductance and resistance, thereby improving performance.

?Suitable for automated production?: SMD components are suitable for the production of automated patch machines, which improves production efficiency and quality stability, while also reducing production costs?.

?Good thermal performance?: SMD components are in direct contact with the PCB surface, which is conducive to heat dissipation and improves the thermal performance of the components?.

?Space saving?: Since SMD components are directly pasted on the PCB board and do not require drilling, space can be saved and the circuit board design can be more compact?.

?Easy to repair and maintain?: The surface mounting method of SMD components makes it more convenient to repair and replace components?.

?Increase production speed?: Automated assembly improves production efficiency, especially in large-scale batch production.

?Improve quality?: Automated assembly reduces human errors and improves the overall quality of the product?.

What is the function of the SMD?

The main functions of SMD (surface mount device) include storing energy, transmitting signals, filtering, and generating magnetic fields. ? These functions make SMD play an important role in various electronic circuits?.

Specifically, SMD inductors can store electrical energy and transfer it to other parts of the circuit, generate a magnetic field through the current, and release energy when the current stops, acting as a buffer to stabilize the current and voltage.

In communication and RF circuits, SMD inductors can also be used as signal transmission elements, changing the current or magnetic field to change the signal characteristics, and are used for functions such as demodulation, modulation, filtering, and frequency selection.

In addition to inductors, SMD also includes other types of devices, such as electrolytic capacitors, whose functions include storing charge, smoothing current, and filtering noise. Electrolytic capacitors have a wide operating temperature range, and a certain range of rated voltage and capacitance, which are suitable for different circuit requirements.

What are the most common SMD components?

The most common SMD components include resistors, capacitors, inductors, integrated circuits, etc. ? These components are widely used in electronic circuits because they have the advantages of small size, light weight, and high installation density.

Resistors: Resistors are one of the most common SMD components and are used to limit the flow of current in the circuit.

Capacitors: Capacitors are used in circuits to store and release electrical energy, similar to temporary batteries.

Inductor: Inductors store energy in a magnetic field when current flows through them. They play a role in filtering and suppressing electromagnetic interference in circuits.

Integrated Circuits: Integrated Circuits are a very important type of SMD components, containing multiple electronic components and circuit structures to achieve specific functions.

As an advanced electronic component installation technology, SMD has many advantages such as miniaturization, high-density packaging, automated production, good electrical performance and easy maintenance. In today’s era of rapid development of electronic technology, SMD has become one of the mainstream technologies for electronic equipment manufacturing.

Posted in FAQ | Tagged SMC, SMD, Surface mount components | Leave a comment

Custom membrane switches&High Quality, Fast Delivery

Posted on October 15, 2024 by seo_li

As a unique electronic component, custom membrane switches are showing strong charm in many fields with their high customizability and excellent performance. It is no longer a standardized product in the traditional sense, but can be precisely customized according to different needs, bringing a new operating experience and visual experience to electronic devices.

What is a membrane switch?

Membrane switch is an operating system that integrates key functions, indicator components, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer, and lower circuit.

Custom membrane switches&High Quality, Fast Delivery

When the membrane switch is pressed, the contact of the upper circuit deforms downward and contacts the plate of the lower circuit. After the finger is released, the contact of the upper circuit rebounds, the circuit is disconnected, and the loop triggers a signal. The membrane switch has a rigorous structure, beautiful appearance, good sealing, moisture resistance, and long service life.

What is a membrane button?

A membrane button is a form of user interface control that works through a thin and flexible surface, usually made of plastic or polyester layer. Its working principle is to apply pressure to a specific point on the membrane to activate the circuit below.

Unlike typical mechanical buttons, membrane buttons have no moving parts, making them very rugged, wear-resistant, and ideal for clean environments and harsh conditions.

They can often be part of a larger membrane switch assembly and can be designed to have a tactile feel to let the user know that the button press has been registered. Its applications include medical devices, consumer electronics, and industrial equipment that require low-profile, cost-effective, and reliable input solutions.

How is a membrane switch made?

Membrane switches are products made by bonding several layers of films of different materials. The thickness is usually between 1.2mm and 2.5mm. It has the dual functions of panel and switch, so it is also called panel switch or thin plate switch.

This type of switch has a short action stroke of only about 0.25mm to 0.5mm, and the switch pressing force is 0.5N to 1N. It is very sensitive and can complete the switch action with a light touch, so it is also called touch switch or touch keyboard.

The production process of membrane switches mainly includes the following steps:

Design graphics: First, design the required graphics and circuits on the film substrate.

Layer bonding: Layers of films of different materials are laminated and bonded together to form a multi-layer structure. Common layers include panel, surface glue, upper circuit, isolation layer, lower circuit and bottom glue.

Circuit production: Conductive materials are printed on the upper and lower circuit layers to form the electrical connection part of the switch.

Assembly and testing: Finally, the various parts are assembled and functional tests are performed to ensure the normal operation of the switch.

What are the characteristics of a custom membrane switch?

Personalized design: Custom membrane switches can be personalized according to the specific needs of customers. Designers can give full play to their creativity and integrate membrane switches with the overall design style of the product to enhance the aesthetics and brand image of the product.

Multifunctional integration: Custom membrane switches can integrate multiple functions, such as buttons, indicator lights, display screens, etc. Through reasonable design, these functions can be integrated on a membrane switch, reducing the space occupation of the product and improving the integration of the product.

High-quality materials: Custom membrane switches are usually made of high-quality materials, such as PET, PC, ITO, etc. These materials have good insulation, conductivity and mechanical properties. At the same time, custom membrane switches can also use special materials to meet the use requirements in different environments.

Strict quality control: The production process of custom membrane switches usually needs to undergo strict quality control, including raw material inspection, production process monitoring and finished product inspection.

What are the advantages of a custom membrane switch?

The core advantages of custom membrane switches are their high degree of customization, durability, sealing and cost-effectiveness.

Custom membrane switches can be designed according to specific needs to meet specific functional and usage environment requirements, while having long life, waterproof and dustproof characteristics, and high cost-effectiveness.

First of all, the high degree of customization of custom membrane switches is one of its biggest advantages. Through silk screen technology and design, any desired pattern and function can be produced to meet the needs of different application scenarios.

Secondly, custom membrane switches have excellent durability and long life. Due to its reverse printing technology and high-quality materials, the service life of membrane switches can generally reach more than five million times, or even higher.

In addition, custom membrane switches also have excellent sealing. Through unique technology, membrane switches can effectively prevent the intrusion of water, oil and other harmful substances, ensuring that the equipment can work properly in various environments.

Finally, the cost-effectiveness of custom membrane switches is also very significant. Due to the optimization of its materials and manufacturing process, the cost of membrane switches is relatively low, especially the price of some products is only a few cents, which is very economical for large-scale production and application. At the same time, the easy installation of membrane switches further reduces the cost of use.

What are the application areas of a custom membrane switch?

Electronic equipment: Custom membrane switches are widely used in the field of electronic equipment, such as mobile phones, tablets, digital cameras, game consoles, etc. It can be used as the operation panel of the equipment, providing functions such as buttons, indicators and displays.

Household appliances: Custom membrane switches are also widely used in the field of household appliances, such as microwave ovens, induction cookers, washing machines, refrigerators, etc. It can be used as the control panel of household appliances, providing functions such as operation buttons, indicators and displays.

Medical equipment: Custom membrane switches also have important applications in the field of medical equipment, such as blood glucose meters, blood pressure meters, electrocardiographs, etc. It can be used as the operation panel of medical equipment, providing functions such as buttons, indicators and displays, and can also meet the requirements of medical equipment for waterproofing, dustproofing and corrosion resistance.

Industrial control Custom membrane switches also have certain applications in the field of industrial control, such as instrumentation, automation equipment, CNC machine tools, etc. It can be used as an operating panel for industrial control equipment, providing functions such as buttons, indicator lights and display screens, while also meeting the requirements of industrial control equipment for waterproofing, dustproofing, corrosion resistance and anti-interference.

Why choose our custom membrane switch?

BEST Technology was established specifically to serve the membrane switch and related mechanical switch industries. As a professional metal dome and metal dome array manufacturer in China, we have many years of experience in this field and guarantee to provide high-quality products, competitive prices, timely delivery and excellent after-sales service. We serve customers in domestic and international markets.

Our production equipment uses the most advanced technology, coupled with our highly qualified managers and researchers, to ensure the reliability and long-term stability of our products.

We have also formulated a very good warranty policy to guarantee that the metal dome and metal dome array will not have any potential defects. We strictly follow the operating procedures specified in ISO9001:2015 in terms of material procurement, product manufacturing, testing, packaging, marketing, etc.

Our products (metal domes, metal dome arrays) are used in a variety of applications, including but not limited to: industrial control interfaces such as membrane switches, buttons and nameplates, keyboards; electronic communications such as two-way radios (walkie-talkies), pagers, mobile phones, cordless phones, remote controls; payment devices such as POS machines, ATMs; automotive industry; medical equipment, ESU pencils; consumer products such as digital cameras, electronic dictionaries, MP3/MP4, smart home products, data acquisition equipment, etc.

Conclusion:

Customized membrane switches, as an excellent choice for personalized electronic interfaces, have the characteristics of personalized design, multi-functional integration, high-quality materials and strict quality control. With the continuous advancement and innovation of technology, customized membrane switches will develop in the direction of intelligence, flexibility and environmental protection, bringing more convenience and innovation to our lives and work.

Posted in Membrane Switches, metal dome array | Tagged membrane button, membrane switche | Leave a comment

Membrane switch rapid prototype

Posted on October 14, 2024 by seo_li

As a unique electronic component, the membrane switch integrates the functions of buttons, indicator elements and decorative panels. It is usually composed of a membrane panel, conductive ink, an isolation layer, an adhesive and a backing adhesive. With its thin, soft, waterproof, dustproof and corrosion-resistant characteristics, it has shown excellent performance and broad application prospects in many fields.

What does a membrane switch look like?

A membrane switch is an operating system that integrates button functions, indicator elements and instrument panels. It consists of four parts: a panel, an upper circuit, an isolation layer and a lower circuit. When the membrane switch is pressed, the contact of the upper circuit deforms downward and contacts the plate of the lower circuit. After the finger is released, the contact of the upper circuit rebounds, the circuit is disconnected, and the loop triggers a signal.

What is the function of a membrane switch?

When the membrane switch is pressed, the contact of the upper circuit deforms downward and contacts the plate of the lower circuit, thereby triggering a signal. When the finger is released, the contact of the upper circuit rebounds, the circuit is disconnected, and a signal input is completed.

The membrane switch realizes multiple functions through its unique structure and working principle. It can not only be used as an exterior decoration, but also as a simple switch button.

Based on the working principle of the membrane pressure sensor, the membrane switch is not picky about the base material and can realize many different functions. It can be integrated into the whole machine panel and used as a function mark to transmit the operation instructions to the rear circuit of the whole machine, thereby controlling the working state of the whole machine.

How long do membrane switches last?

The service life of the membrane switch can generally reach more than 1 million times. Since the action of the membrane switch is mainly realized by the vertical bounce of the elastic film, after millions of creeping, the creeping amplitude is very small, only 0.1-0.3mm, and the rationality of the material selection, the membrane material can withstand more than one million times of use without deformation.

The durability of the membrane switch is good, and its long service life lies in its design and material selection. The surface of the base material of the membrane switch is required to be flat and rust-free, and it can be installed after being cleaned with alcohol or gasoline.

Although the elastic film has undergone millions of creeping, the creep amplitude is very small, and the material selection is reasonable, so the membrane material can withstand more than one million times of use without deformation.

In addition, membrane switches also have the advantages of small size and light weight. Their total thickness is generally between 1.0 and 1.5 mm, which is only equivalent to the thickness of an ordinary aluminum panel. These characteristics make membrane switches widely used in various devices.

What are the different types of membrane switches?

There are many types of membrane switches, mainly including touch membrane switches, pressure membrane switches and capacitive membrane switches.

1. The touch membrane switch uses the change of mutual capacitance when the human body touches the switch area to realize the switch operation. It has a good operating feel, a simple structure, and stable operation.

2. The pressure membrane switch uses the principle of mechanical elasticity to realize the switch operation by contacting the switch contacts under pressure. It has high reliability and simple structure.

3. The capacitive membrane switch uses the electrostatic effect of the finger to detect the switch state. It has a fast response speed, no mechanical movement, and a long life.

In addition, membrane switches can also be divided into single-layer membrane switches, double-layer membrane switches and multi-layer membrane switches according to the structural form.

1. The single-layer membrane switch has a simple structure, low price, small size, and is suitable for occasions with simple circuit design.

2. Double-layer membrane switches have high performance, reliability and anti-interference ability.

3. Multi-layer membrane switches use multiple contact structures to achieve switch functions through crimping or lamination, and are suitable for occasions that require complex circuit design.

According to different sizes, membrane switches can also be divided into large membrane switches, medium membrane switches and small membrane switches. Large membrane switches are suitable for occasions that require a large number of switches, medium membrane switches are suitable for medium-sized circuit control, and small membrane switches are suitable for circuit embedded design and smaller occasions.

Are membrane switches tactile or linear?

Membrane switches are tactile switches. When the membrane switch is pressed, the contacts of the upper circuit deform downward and contact the plates of the lower circuit. After the finger is released, the contacts of the upper circuit rebound, the circuit is disconnected, and the circuit triggers a signal. This design of realizing the switch function through tactile feedback makes the membrane switch a tactile switch.

The working principle of the membrane switch is based on its unique structural design. It consists of a panel, an upper circuit, an isolation layer, a lower circuit and other parts. When the panel is not pressed, the upper and lower contacts are disconnected, and the isolation layer plays an isolation role. When the panel is pressed, the contact of the upper circuit deforms and contacts the lower circuit to conduct, thus triggering the signal. When the finger is released, the contact bounces back and the circuit is disconnected.

Membrane switches have many advantages, including rigorous structure, beautiful appearance, good sealing, long service life, and strong durability. Due to its simple structure, easy installation, and good feel, membrane switches are widely used in home appliances, medical equipment and other fields, gradually replacing some of the touch switches in the market.

What are 4 different types of rapid prototyping?

There are mainly 4 different types of rapid prototyping of membrane switches: flat touch type, hot pressing convex feel type, metal shrapnel type, and capacitive induction type. However, due to the lack of operating feel, it is easy to cause repeated operation or misoperation.

Flat touch type: This type of membrane switch uses a thin film substrate to print the conductor, and does not use a secondary process. Its advantages are high key life, which can reach one million times, and a large contact area to ensure the conduction rate.

Hot-pressed convex feel type: This type uses a film material to print the contact surface and then roll up the convex points to form a rebound force. The advantages are high life, up to more than 500,000 times, good feel, and the stroke and force can be customized according to customer needs. The disadvantages are that the mold cost is high, and use in a high temperature environment may cause the key force to weaken.

Metal shrapnel type: This type uses metal shrapnel as a conducting medium, with good touch and stable conductive properties. The advantages include uniform force and a crisp sound during operation. The disadvantage is that it may cause a short circuit or malfunction when the lining is uneven.

Capacitive induction type: This type uses a conductor to sense conduction, similar to a capacitive touch screen, and can sense action within a certain distance. The advantage is that the sensing distance can be designed according to customer needs, but the disadvantage is that the finished product qualification rate is low and it is sensitive to surrounding electromagnetic interference.

What is the difference between a membrane switch and a mechanical switch?

The main differences between membrane switches and mechanical switches are their working principles, usage experience, sealing, and application scenarios.

The core difference between membrane switches and mechanical switches lies in their different working principles. Membrane switches trigger key signals by pressing to close the circuit, while mechanical switches trigger signals through the physical movement of mechanical parts.

In terms of user experience, membrane switches require less force to trigger and react faster, but the feel may not be as comfortable as mechanical switches; while mechanical switches require greater force to press and the reaction time may be slightly longer.

In terms of sealing, membrane switches have better sealing, can effectively prevent water and moisture from entering, and are suitable for use in places that require waterproofing.

Finally, in terms of application scenarios, membrane switches are widely used in electronic communications, medical equipment, automotive industry and other fields due to their good sealing and long service life; while mechanical switches are often used in devices that require clear touch due to their clear physical feedback and high durability.

What are the applications of membrane switch?

Membrane switch is a new type of electronic component that is widely used in many fields. It has the characteristics of moisture resistance and long service life, and can work stably in various environments.

The specific application areas of membrane switches include:

1. Instruments: such as measuring instruments, analytical instruments, navigation instruments, medical instruments, etc.

2. Electromechanical products: such as CNC machine tools, electronic scales, robots, printing machinery, etc.

3. Computers: such as operating keyboards, monitors, printers, plotters, etc.

4. Household appliances: such as remote controls, electronic locks, washing machines, microwave ovens, rice cookers, audio and video equipment, etc.

5. Office systems: such as telephones, fax machines, copiers, computers, etc.

6. Electronic toys: such as electronic pianos, game consoles, etc.

The characteristics of membrane switches include:

1. It has good waterproof, dustproof, oil-proof and anti-harmful gas erosion performance.

2. Stable and reliable performance, light weight, small size and long life.

3. Convenient assembly, the panel can be washed without damage to the characters.

4. Rich colors, beautiful and generous.

Conclusion:

In conclusion, rapid prototyping technology has brought many benefits to the development of membrane switches, greatly shortening the development cycle, reducing costs and improving product quality. With the continuous advancement and innovation of technology, membrane switches will continue to expand their application scope in the future.

BEST Technology was established specifically to serve the membrane switch and related mechanical switch industries. We have many years of experience in this field and guarantee to provide high-quality products, competitive prices, timely delivery and excellent after-sales service.

Posted in Membrane Switches, metal dome array | Tagged membrane switch, metal dome, metal dome array | Leave a comment

Tactile switch function&principle,High Quality

Posted on October 14, 2024 by seo_li

The most basic function of a tactile switch is to act as a trigger device. When the user presses the switch, it can respond quickly and change the state of the circuit. Whether it is turning on or off an electronic device or starting a specific function, a tactile switch can accurately execute instructions.

What is a tactile switch?

A tactile switch is a switch that works based on the principle of compression and release of a spring contact piece.

Tactile switch function&principle,High Quality

A tactile switch usually consists of a housing, a button, a spring contact piece, and a metal terminal. When the button is pressed, the spring contact piece is compressed and contacts the metal terminal, forming a low-impedance circuit that allows current to pass. After releasing the button, the spring contact piece returns to its original state, the contact separates from the metal terminal, and the circuit is disconnected.

The characteristics of a tactile switch include:

1. Simple structure: It consists of a housing, a button, a spring contact piece, and a metal terminal, and the structure is relatively simple.

2. Convenient operation: The circuit is opened and closed by pressing a button, which is easy to operate.

3. Obvious feedback: The circuit is switched on and off by compressing and releasing the spring contact piece, with obvious tactile feedback.

4. Strong durability: Due to the elastic design of the spring contact piece, the tactile switch has a long service life?.

How do tactile buttons work?

The working principle of the tactile button is based on the compression and release of the spring contact piece, and the circuit is switched on and off by the contact and separation of the contact point.

The working principle of the tactile button can be divided into the following steps:

1. Compression phase: When the button on the tactile switch is pressed, the button applies force to the spring contact piece, compressing the spring contact piece so that it contacts the metal terminal, thereby closing the circuit.

2. Contact phase: In the closed state, a low-impedance circuit is formed between the contact and the metal terminal, allowing current to pass. At this time, the output signal of the tactile switch is activated, which can trigger the corresponding functions of other electronic devices.

3. Recovery phase: When the finger leaves the button, the spring contact piece returns to its original state, pushes the button away, and disconnects the circuit.

Features and advantages of tactile buttons include:

1. High sensitivity: Tactile buttons are very sensitive to changes in external forces and can respond quickly and switch the state of the circuit.

2. Stability: High-quality tactile switches can provide better touch and stable performance, and have a longer service life.

3. Wide application: Tactile buttons have been widely used in many fields, such as home appliances, automotive control panels, industrial automation, etc.

Is a tactile switch momentary?

Tactile switches are not momentary switches. There are significant differences in functions and characteristics between tactile switches and momentary switches.

A tactile switch is an electronic switch that senses operation by touch. When the button is pressed, the spring contact piece is compressed and contacts the metal terminal, thereby closing the circuit; when the button is released, the spring contact piece returns to its original state and the circuit is disconnected.

A momentary switch, also known as a tactile switch, is a low-current, momentary-action push button switch that is usually used in situations where a quick response is required. It is different from a tactile switch in that a momentary switch immediately closes the circuit when pressed, and the circuit is disconnected after releasing it, and there is no continuous circuit connection state.

In summary, although both tactile switches and momentary switches belong to the category of electronic switches, they have obvious differences in working principles and application scenarios. Tactile switches open and close the circuit through touch operations, while momentary switches achieve rapid response and disconnection of the circuit through momentary actions.

Do tactile switches stay on?

Tactile switches cannot stay on. The design principle of tactile switches determines that it cannot stay on. When the button on the tactile switch is pressed, the button applies force to the spring contact piece, compressing the spring contact piece so that it contacts the metal terminal, thereby closing the circuit. However, when the finger leaves the button, the spring contact piece returns to its original state and disconnects the circuit.

The working principle of the tactile switch is to apply pressure to the spring contact piece through a button or key. The elastic spring contact piece is very sensitive to changes in external forces and can respond quickly and switch the state of the circuit.

When the button or key is pressed, the spring contact piece is compressed and contacts the metal terminal, closing the circuit; when the finger leaves the button, the spring contact piece returns to its original state and disconnects the circuit. This design allows the tactile switch to respond quickly to external operations, but it cannot stay in the open state.

What happens when the tactile switch is pressed?

First, the finger will feel a certain resistance and tactile feedback. Tactile switches are usually designed with a moderate pressing force requirement, and when the pressure is applied to reach the trigger point, the mechanical structure inside the switch will change.

For traditional tactile switches, internal elastic metal sheets or rubber domes and other components will deform under pressure. This deformation will cause the circuit state to change. The originally disconnected circuit contacts may be connected, allowing current to pass through the circuit where the switch is located.

At the same time, a slight “click” sound may be heard, which is the sound produced by the movement of the mechanical structure inside the switch, further providing feedback to the user that the operation is successful.

What’s the difference between tactile and linear switches?

The main difference between tactile switches and linear switches is that they work differently and have different feedback mechanisms. Tactile switches provide clear tactile feedback during the keystroke process, while linear switches need to be fully pressed to work smoothly, without tactile feedback in the middle.

Tactile switches provide a clear tactile feedback during the keystroke process, that is, the key will trigger a signal after being pressed a certain distance, and the user can feel the feedback of the key by hand.

Linear switches need to be fully pressed to work smoothly, without tactile feedback in the middle. This switch is suitable for scenarios that require smooth operation. It provides a damping-free keystroke experience and is suitable for long-term typing and gaming.

Why do tactile switches have four pins?

The reason why tactile switches have four pins is to support more functions and application scenarios. The four pins correspond to the input and output ends respectively, allowing the tactile switch to control two circuits at the same time, increasing the flexibility and functionality of use.

Specifically, the design of four pins allows the tactile switch to play a more flexible role in the circuit. When it is necessary to control the on and off of two LED lights, if a tactile switch with single-pole wiring is used, two switches are required to control the two lights separately. The four-pin tactile switch can control the two LED lights through two input terminals and two output terminals, thereby simplifying the circuit design.

In addition, the internal structure of the four-pin tactile switch usually relies on metal springs to protect the force and realize the connection and disconnection. When the switch is pressed, the contact between the normally closed contact and the normally open contact is disconnected to disconnect the circuit; when the switch is released, the contact is closed again and the circuit is connected.

This design makes the tactile switch similar to the ordinary button switch in working principle, but by increasing the number of pins, the convenience and functionality of use are improved.

What is the function of a tactile switch?

The main function of the tactile switch is to apply pressure to the spring contact piece through a button or key to realize the opening and closing of the circuit. When the finger leaves the button or key, the spring contact piece returns to its original state, disconnects the circuit, and realizes the opening and closing function of the circuit.

The tactile switch has the following specific functions:

Basic control function: The most basic function of the tactile switch is to control the opening and closing of the circuit through a button or key, which is suitable for the switch control of various electrical equipment.

Durability: Since the physical structure and material selection of tactile switches have an important impact on their performance and lifespan, tactile switches usually have a long service life and stable performance.

Widely applied: Tactile switches are widely used in various electronic devices, household appliances and industrial control systems due to their simple and reliable design.

What are the applications of tactile switch?

Tactile switches are an electronic switch that belongs to the category of electronic components. Their operation can be sensed by touch. They have the advantages of small contact resistance, accurate operating force error and diversified specifications.

Specific application scenarios of tactile switches include:

Automotive industry: Touch switches are used to control door switches, touch control panels, etc.

Medical industry: Touch switches are used in medical equipment and controllers.

3C products: Touch switches are used in touch lamps, induction cookers and wall switches, etc.

Information appliances: Touch switches are used to improve operating efficiency and user experience.

Industrial equipment: Touch switches are used for automation control and start buttons.

White appliances: Touch switches are used for smart home decoration and convenient operation?.

In short, tactile switches have multiple functions and they play an important role in electronic devices. Whether it is the basic trigger function, or the provision of tactile feedback, waterproof and dustproof, miniaturization and lightweight, high reliability, strong customizability, energy saving and environmental protection, etc., they all provide strong support for the performance and user experience of electronic devices.

Posted in Four leg metal dome, Metal Dome Assembly | Tagged Tactile dome switches, Tactile switch | Leave a comment

What is a switch rubber dome?

Posted on October 9, 2024 by Love Dome

A rubber dome switch is a common electronic switch that is usually composed of a rubber dome and a metal contact. Rubber has good elasticity and flexibility, which allows the switch rubber dome to quickly return to its original shape after being subjected to pressure. This ensures that the switch can rebound in time after being pressed, ready for the next operation.

What are rubber dome switch?

A rubber dome switch is a common type of keyboard switch, and its name comes from the way the key and the circuit are in contact through a simple dome-shaped silicone membrane. The design of this switch allows the key to transmit force through the rubber dome when it is pressed, thereby triggering the circuit to close or open.

The working principle of the rubber dome switch is that when the key is pressed, the dome-shaped silicone membrane deforms, causing the circuit to be turned on or off. Compared with mechanical switches, rubber dome switches provide less feedback and are often described as a “mushy” feeling because they provide relatively weak tactile feedback.

Features of rubber dome switches include:

1. Light touch feedback: When the key is pressed, it provides lighter tactile feedback, which is suitable for long-term typing.

2. Durability: Due to its simple structure, the rubber dome switch has high durability and is suitable for high-frequency use scenarios.

3. Cost-effectiveness: Compared with mechanical keyboards, the cost of rubber dome switches is lower and suitable for the mass consumer market.

How does a rubber dome switch work?

The dome rubber switch is mainly composed of a rubber dome and a metal contact. When not pressed, the rubber dome remains in a natural convex state, the metal contact is disconnected, and the circuit is not conductive. When an external force presses the rubber dome, the dome deforms and sinks downward, gradually approaches and contacts the metal contact, so that the metal contacts are connected together, the circuit is conductive, and the electronic device performs the corresponding operation according to the switch state.

After the external force disappears, the rubber dome returns to its original state by its own elasticity, separates from the metal contact, and the metal contact is disconnected again, and the circuit returns to the non-conductive state. For example, in a remote control, pressing the dome rubber switch can trigger a signal to allow the device to perform an operation. After releasing it, the switch returns to its original state, and the device stops operating and waits for the next trigger.

Is a rubber dome switch good?

Rubber dome switches achieve key functions through simple dome-shaped silicone membrane contact and are often considered overwhelming because they provide less feedback compared to mechanical switches.

Advantages of rubber dome switches include:

1. Soft pressing feeling: The pressing feeling of rubber dome switches is generally considered to be relatively soft, suitable for long-term typing and gaming.

2. Low cost: Due to the relatively simple structure and manufacturing, keyboards with rubber dome switches are usually more affordable.

3. Good durability: This switch type can still maintain good performance after multiple presses.

However, there are also some disadvantages of rubber dome switches:

1. Less feedback: Compared with mechanical switches, rubber dome switches provide less feedback and may not be sensitive enough for precise operations.

2. Long pre-travel distance: A certain travel distance is required when pressing the key, which may not be ideal for games that require fast reactions.

3. Not suitable for all purposes: Due to its gentle nature and long pre-travel distance, rubber dome switches may not be suitable for all purposes, especially in situations where high-precision input is required.

Are rubber dome switches membranes?

Rubber dome switches are not membrane switches. ? Rubber dome switches and membrane switches are two different technologies, although they are both used to trigger key functions.

The main difference between rubber dome switches and membrane switches lies in their working principles and structures. Rubber dome switches use a rubber dome to trigger keys. When the key is pressed, the rubber dome deforms, causing the internal switch contacts to close, thereby triggering a signal.

The membrane switch consists of four parts: panel, upper circuit, isolation layer, and lower circuit. When the contacts of the upper circuit deform downward and contact the plates of the lower circuit, the circuit is turned on and the signal is triggered.

Membrane switches are an operating system that integrates key functions, indicating elements, and instrument panels. They have a rigorous structure, beautiful appearance, and good sealing. They are widely used in medical, industrial control, automation, rail transportation, aviation and navigation, and other fields. Rubber dome switches are more commonly found in regular computer keyboards and office equipment, providing basic key actuation functions but with poor feedback and tactile feel.

Is rubber dome better than mechanical?

Rubber dome and mechanical switches each have their own advantages and disadvantages, with the main difference between rubber dome switches and mechanical switches being their tactile feel and feedback mechanisms.

Rubber dome switches are the classic keyboard switch type, commonly found in most traditional keyboards and affordable keyboard designs. They are inexpensive, quiet, and good enough for office tasks. However, they are not very responsive and are more prone to missed presses than other switch types, making them less ideal for frequent typists and gamers.

Mechanical keyboards use individual mechanical switches, which provide better tactile feel and feedback, allowing your fingers to feel each key actuation. This feedback comes from the mechanical switches inside the mechanical keyboard, which are more stable and durable than the rubber dome structure of membrane keyboards.

However, mechanical keyboards also have their drawbacks. First, mechanical keyboards are usually more expensive than rubber dome keyboards, which may be prohibitive for some budget-conscious users.

Secondly, mechanical keyboards are usually larger and heavier than membrane keyboards, making them less convenient to carry. Finally, due to their complex internal structure, mechanical keyboards are also relatively difficult to repair and clean.

In summary, choosing a rubber dome or a mechanical switch depends on the user’s specific needs and usage scenarios.

Is rubber dome the same as membrane?

Rubber domes and membrane switches are not exactly the same technology. Rubber domes are often used in membrane switches as a way to trigger keys, while membrane switches are a broader category that includes many different types of switch designs.

Rubber domes are a component in membrane switches that are used to achieve the triggering function of keys. When a key is pressed, the rubber dome deforms, allowing the circuit above to contact the circuit below, thereby completing the transmission of the signal.

Membrane switches are a broader category that includes many different types of switch designs. In addition to membrane switches that use rubber domes, there are also tactile and non-tactile membrane switches. Tactile membrane switches provide tactile feedback through metal dome buttons or polymer dome buttons, simulating the feeling of pressing a physical button. Non-tactile membrane switches do not use these dome buttons and usually integrate audio or LED indicators to provide activation signals.

In summary, the rubber dome is a component in the membrane switch that is used to achieve the trigger function of the button, while the membrane switch is a broader category that includes the use of rubber domes and other different types of switch designs.

In short, as an important electronic component, the switch rubber dome plays an irreplaceable role in electronic devices. Its good tactile feedback, waterproof and dustproof performance, low cost and high reliability have made it widely used in various electronic devices.

Posted in metal dome array, metal dome related | Tagged metal dome, rubber dome, switch | Leave a comment

Custom Membrane Keyboard for Membrane Switch

Posted on September 4, 2024 by Love Dome

What is a membrane switch?

A membrane switch, also known as a tactile keyboard, is a new type of electronic component that integrates light, mechanics, and electricity into a sealed, multilayered structure. It combines key switches, panels, markings, symbol displays, and backing plates into a single sealed unit. This innovation represents a fundamental change in the external structure of electronic products, replacing conventional discrete components to execute tasks in operating systems more reliably.

A membrane switch is composed of four parts: the panel, upper circuit, isolation layer, and lower circuit. When the switch is pressed, the contact of the upper circuit deforms downward, touching the lower circuit to create a connection. Once the finger is released, the contact rebounds, breaking the circuit and triggering a signal.

Custom Membrane Keyboard for Membrane Switch

The membrane switch has a rigorous structure, beautiful appearance, and good sealing performance. It has the characteristics of good waterproof, dustproof, oil proof, harmful gas erosion proof, and long service life. The main type of membrane switch is the membrane switch panel, which is an electronic component composed of a rigid or flexible printed circuit board as the substrate, with tactile or non tactile buttons installed, and then covered with plastic (polycarbonate PC, polyester PET, etc.) film panels printed with colored decorative patterns. It integrates switch function and decorative function, and is a new type of human-machine dialogue interface. The connection between its switch circuit and the entire machine can be achieved through welding or plugging.

Types of membrane switch

1. Flexible membrane switch

This is the most common type of membrane switch, referred to as flexible due to its construction from flexible materials for the panel, isolation layer, and circuit layer. The circuit layer, typically made from PET (polyester) with good electrical properties, contains the switching circuit patterns and tactile domes. Due to the properties of polyester, flexible membrane switches have good insulation, heat resistance, flexibility, and resilience. The circuit patterns, including connections and lead wires, are printed with conductive inks cured at low temperatures.

2. Rigid membrane switch

Rigid membrane switches have their circuits and patterns created on rigid printed circuit boards (PCBs). These switches are easy to manufacture, have stable processes, and low resistance. Certain components can be directly soldered onto the back of the rigid PCB, eliminating the need for an additional backing layer. Rigid switches often use metal domes for tactile feedback, providing a good tactile feel. However, they are less convenient to integrate into equipment compared to flexible switches, usually requiring soldering and flat cables for connections.

3. Flat membrane switch

In the early stages of membrane switches, key positions, shapes, and sizes were indicated solely by color differences, leading to reliance on visual identification for operation accuracy.

4. Embossed membrane switch

Membrane switches with embossed keys, which are raised above the panel to form a 3D shape, improve identification speed and tactile sensitivity, enhancing both functionality and aesthetic appeal. The embossing is generally done using precise molds.

Metal domes in Membrane switch

Metal domes, also known as snap domes, are a key component of membrane switches, usually made of ultra-thin (0.05mm-0.1mm thickness) and ultra thick (generally high hardness) stainless steel 301 or 304 materials. These domes provide a good tactile feel and precise travel control. They are used in membrane switches, contact switches, PCBs, FPCs, medical devices, and more. In addition to metal domes, other types such as thermoformed tactile domes and flat tactile domes are available, each with its own set of advantages and applications.

Metal Domes (Snap Domes)

Metal domes are used as the conductive medium in membrane switches, offering advantages such as a good tactile feel, consistent actuation force, and precise travel accuracy. They have a wide operating temperature range, typically from -20°C to 80°C. However, if the backing plate is not flat or if it is attached to a surface with excessive curvature, it may cause short circuits, malfunctions, or lack of rebound.

Embossed Tactile Domes

These domes create rebound force through embossed points formed after printing the contact surface on the membrane material. This type of dome has a long lifespan, reaching up to 500,000 cycles, and provides a good tactile feel. The travel distance and force can be customized according to customer needs. However, the mold cost is high, requiring specific embossing molds, and using these domes in high-temperature environments may weaken the actuation force.

Flat Tactile Domes

These domes use a membrane substrate printed with a conductive material at the contact points, without any secondary processing. The keys have a high lifespan, reaching up to 1 million cycles, and offer a large contact area, ensuring good conductivity. However, they lack tactile feedback, which can lead to repeated or incorrect operations.

Additionally, there are Capacitive Sensing Domes and EL (Electroluminescent) Backlit Domes. Capacitive sensing domes use conductive materials to sense touch and can operate from a certain distance, but their production yield is low, and they are sensitive to surrounding electromagnetic interference. EL backlit domes, in contrast to LED light guide types, significantly reduce thickness, making them suitable for always-on states without heat concerns.

What is the difference between a tactile switch and a membrane switch?

1. Working principle

Tactile switches usually achieve switch functions through touch sensing, without the need for physical contact, but by sensing the proximity or touch of fingers or other objects to trigger changes in switch status. This type of switch typically relies on capacitive touch technology, which controls the on/off of the circuit by detecting changes in the touch position. A membrane switch is an electronic component that achieves switching function through physical pressing. It consists of four parts: panel, upper circuit, isolation layer, and lower circuit. When the membrane switch is pressed, the contacts of the upper circuit are in contact with the plates of the lower circuit, and when released, the contacts bounce back and the circuit is disconnected.

2. Durable performance

Due to its mechanical structure, tactile switches are typically more durable than membrane switches. They can withstand more presses and usage frequencies, making them suitable for situations that require long-term use. The durability of membrane switches is relatively low because their flexible materials may wear or damage over time.

3. Application Fields

Due to the non-contact operation mode of tactile switches, they are particularly suitable for occasions that require hygiene control, such as hospitals, food processing, etc. In addition, tactile switches are widely used in scenarios that require user-friendly interaction, such as public information query systems and smart home systems. Thin film switches are widely used in fields such as electronic communication, electronic measuring instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances, etc. due to their rigorous structure, beautiful appearance, and good sealing performance.

4. Technical parameters

Tactile switches typically have high sensitivity and fast response capabilities, capable of detecting small touch actions. In addition, tactile switches also need to consider waterproof, dustproof and other characteristics to ensure reliability in various environments. Membrane switches focus on durability and stability, typically with a lifespan of over five million cycles and the ability to operate normally in various harsh environments.

Are Membrane Switches Good?

The service life of membrane switches with good durability can generally reach over one million times. Due to the fact that the switch action is only achieved by the vertical movement of the elastic film, although it has undergone millions of times of creep, the amplitude of creep is very small, only 0.1-0.3mm. In addition, the rationality of material selection is far from reaching the yield limit of the film. Therefore, the film material can withstand more than one million times of use without deformation.

The membrane switch has good sealing performance, is a whole structure sealed, not easy to oxidize, and has the characteristics of good waterproof, dustproof, oil proof, and harmful gas erosion resistance. It is suitable for use in various harsh environments.

The lightweight and small volume film switch can be arranged and combined into a film keyboard in design, and the sealed thin sheet structure composed of multiple layers of films. All the connecting wires and lead out wires between the switches are completed by screen printing at once, with a total thickness between 1-3mm. The volume is reduced, the quality is reduced, and the reliability is also improved.

The colorful film switch has a beautiful and elegant appearance, with rich colors that can be conceived according to the user’s design. The decorative effect reflects the comprehensive characteristics of material beauty, decorative beauty, and craftsmanship beauty.

The installation of film switches to reduce the supporting costs of electromechanical products is adhesive type. Simply remove the backing adhesive paper and it can be firmly attached to the surface of the whole machine. Its lead outlet can be inserted into the socket of the rear circuit of the whole machine to connect the circuit. Save labor and materials, reduce the cost of supporting the whole machine.

Application of membrane switches

Membrane switches are used in a wide range of applications, including:

Instruments and Meters – Measurement instruments, analytical instruments, navigation instruments, medical instruments.
Home Appliances – Remote controls, electronic locks, washing machines, microwave ovens, rice cookers, audio and video equipment.
Office Systems – Telephones, fax machines, copiers, counters.
Computers – Operating keyboards, monitors, printers, plotters.
Electronic Toys – Electronic pianos, gaming consoles, electronic targets.

Membrane Switch HS Code

The export customs code for membrane switches is 8536900000. The HS (Harmonized System) code is an international classification system for trade products, used for customs tariffs and trade statistics. Membrane switches are classified as electrical equipment switches under this code, covering devices with a voltage not exceeding 1000V AC or 1500V DC.

While the export customs code, it is important to provide detailed product descriptions and technical parameters to ensure accurate classification and avoid issues with tariffs or customs clearance. As technology evolves, new codes may emerge to reflect specific product characteristics more accurately.

Posted in FAQ, Membrane Switches, Metal Dome Assembly | Tagged custom membrane switch, membrane keyboard | Leave a comment

How to Choose Right SMD Switches?

Posted on August 30, 2024 by Love Dome

What are SMD Switches?

Surface Mount Device (SMD) switches are tiny electronic components designed for mounting directly onto the surface of PCBs. Unlike traditional through-hole switches, which require leads to be inserted into holes on the PCB, SMD switches sit on the board’s surface. This design allows for a more compact, lightweight, and cost-effective assembly process, especially useful in modern electronic devices where space is at a premium.

SMD switches come in various forms and are used in a wide range of applications, from consumer electronics to industrial equipment. They play a crucial role in user interfaces, providing the means to turn devices on or off, adjust settings, or input commands.

How do SMD Switches Work?

SMD switches operate by creating or breaking an electrical connection in a circuit. When the switch is pressed, it closes the circuit, allowing current to flow. Releasing the switch opens the circuit, stopping the current flow.

Inside an SMD switch, a small metal contact is pressed down onto a conductive pad on the PCB when the switch is activated. This contact bridges the gap between two conductive traces on the PCB, completing the circuit. The switch returns to its original position when released, thanks to a small spring or other mechanism inside the switch. The design of SMD switches ensures reliability and durability. Despite their small size, they can withstand thousands or even millions of actuations without failure.

Types of SMD Switches

SMD switches come in various types, each designed for specific applications and environments.

1. Tactile Switches

Tactile switches are among the most common types of SMD switches. They provide a physical and audible “click” when pressed, giving users feedback that the switch has been activated. This tactile response is valuable in applications where users need confirmation that a button has been pressed, such as in keyboards, calculators, and control panels. They are available in various sizes, actuation forces, and configurations to suit different applications.

2. Slide Switches

Slide switches allow users to make a selection between two or more positions by sliding a small lever. These switches are commonly used in applications where space is limited, such as in portable electronics and handheld devices. They are often used to control power, select modes, or switch between different functions.

3. Push Button Switches

Push button switches are straightforward in design, with a button that users press to activate the switch. They can be momentary (only active while pressed) or latching (stays active until pressed again). Push button switches are used in various applications, from power switches on devices to reset buttons on circuits.

4. Rotary Switches

Rotary switches allow users to select between multiple options by rotating a knob or dial. They are commonly used in applications where users need to choose between several settings, such as in audio equipment, instruments, and control panels. Rotary switches are reliable and offer clear, positive detents for each position.

5. DIP Switches

DIP (Dual In-line Package) switches consist of a series of small switches mounted in a single package. Each switch can be individually toggled, allowing for various configurations or settings. DIP switches are often used for setting options or configurations on PCBs, such as addressing, mode selection, or enabling/disabling features.

Benefits of SMD Switches

The advantages of SMD switches go beyond their compact size and reliability. One key benefit is the cost savings in manufacturing, as these switches can be mounted onto PCBs using automated pick-and-place machines. This automation reduces labor costs and enhances production efficiency.

Moreover, SMD switches are easier to integrate into designs due to their small footprint. They also offer lower parasitic capacitance and inductance compared to through-hole switches, which is particularly beneficial for high-frequency circuits. Overall, SMD switches contribute to the creation of high-quality, compact electronic devices that are economical to produce.

How to Choosing the Right SMD Switch?

Selecting the right SMD switch for a project involves considering several factors, including the application, environment, and specific requirements of the device. Here are some key considerations to keep in mind:

1. Application Requirements

The first step in choosing an SMD switch is to understand the specific requirements of the application. This includes the type of actuation needed (momentary or latching), the desired tactile feedback, and the size constraints of the device.

For example, tactile switches are ideal for user interfaces where feedback is important, while slide switches may be better suited for mode selection in compact devices. Understanding the application’s needs will help narrow down the options and select the most suitable switch.

2. Environmental Considerations

The environment in which the SMD switch will be used is another crucial factor. For example, switches used in outdoor or harsh environments may need to be sealed against moisture, dust, or other contaminants. In contrast, switches for consumer electronics may prioritize a sleek, low-profile design.

3. Electrical Specifications

The electrical specifications of the SMD switch, such as voltage rating, current rating, and contact resistance, must match the requirements of the circuit. Additionally, consider the switch’s bounce time, which can affect the performance of high-speed or sensitive circuits. A switch with low bounce time is preferable for applications where precise timing is critical.

4. Mechanical Durability

The mechanical durability of the SMD switch, including its actuation force, travel distance, and lifespan, should match the needs of the application. For example, a switch used in a frequently operated control panel should have a high actuation life and a comfortable actuation force to prevent user fatigue.

5. Cost and Availability

Finally, consider the cost and availability of the SMD switch. While it may be tempting to choose the most advanced or feature-rich switch, it’s essential to balance performance with cost, especially in high-volume production.

FAQs about SMD switch

1. How do I mount an SMD switch on a PCB?

SMD switches are typically mounted on PCBs using automated pick-and-place machines. The switches are placed onto solder paste on the PCB surface and then passed through a reflow oven, where the solder melts and bonds the switch to the board.

2. How long do SMD switches last?

The lifespan of an SMD switch depends on its design and the specific application. High-quality SMD switches can last for millions of actuations. Factors such as the switch’s construction, the materials used, and the operating environment will influence its durability.

3. Can SMD switches handle high current?

SMD switches are typically designed for low-current applications, as their compact size limits the amount of current they can safely handle. However, there are specialized SMD switches with higher current ratings for specific applications. It’s important to check the switch’s electrical specifications to ensure it meets your circuit’s current requirements.

4. How do I test SMD switches during assembly?

SMD switches can be tested during assembly using automated testing equipment such as bed-of-nails testers or flying probe testers. These systems can check the electrical continuity of the switch and verify its operation by simulating user inputs.

5. What are common issues with SMD switches and how can they be prevented?

Common issues with SMD switches include poor solder joints, contamination, and mechanical damage. These can be prevented by ensuring proper PCB design, using high-quality materials, and following best practices during assembly, such as controlling humidity and temperature and avoiding excessive mechanical stress.

6. What are the alternatives to SMD switches?

Alternatives to SMD switches include through-hole switches, which are mounted by inserting leads into PCB holes, and capacitive touch switches, which use a touch-sensitive surface instead of a mechanical actuator. The choice between SMD and alternatives depends on the specific requirements of the application.

Posted in Business | Tagged dome assembly, dome switch, metal dome, smd switch | Leave a comment

What are dome arrays? How does a metal dome arrays work?

Posted on August 29, 2024 by Love Dome

At Best Technology, we offer metal dome & metal dome arrays to provide tactile feedback with our membrane switches. Custom dome arrays as a standalone part that can be applied to circuit boards as well. We provide metal dome assembly service to let you enjoy the one-stop service.

What Are Dome Arrays?

Dome arrays called metal dome array or dome sheet. They are essential components in various electronic devices, particularly in interfaces where precise tactile feedback is crucial. They consist of a collection of metal domes arranged on a flexible substrate, often made of materials like polyimide or polyester. These polyester films are always lined with adhesive. The adhesive backing can be removed and applied directly onto a circuit board (often a printed circuit board, or PCB). These arrays are typically used beneath keypads or switches, providing a tactile “snap” when pressed.

The design of dome arrays can vary depending on the application, but they generally consist of multiple metal domes that function as individual switches. Each dome in the array acts as a contact point, bridging the circuit when pressed. This simple yet effective design is widely appreciated in industries where reliability and durability are key, such as in medical devices, automotive controls, and industrial equipment.

How Do Metal Dome Arrays Work?

The working mechanism of metal dome arrays is relatively straightforward but highly effective. Each dome in the array is slightly convex and rests above a circuit. When a user presses on the dome, it deforms and comes into contact with the circuit below, completing the electrical connection. This action generates a signal, indicating that the switch has been activated.

The snap action, or the tactile feedback, is one of the most significant features of metal dome arrays. This feedback is not just satisfying to the user but also serves as a functional assurance that the input has been registered. The force required to deform the dome and the resulting tactile feedback can be customized according to the specific needs of the application.

Types of Dome Arrays

Dome arrays come in various configurations, each tailored to meet specific application requirements. In Best Technology, when you ask for a metal dome arrays, the sales may question that which kind of dome arrays you want? Below are the different types of dome arrays offered by Best Technology, along with their unique structures and uses. Hope it makes sense.

Single Layer Dome Arrays

Single layer dome arrays are the most basic type, consisting of a single layer of metal domes lined up on the polyimide/PET. These arrays are straightforward in design and are often used in applications where simplicity and cost-effectiveness are key. This type of metal dome array is used in the early period of dome arrays industry. Metal dome contacts are attached under Mylar (one layer of adhesive PET film). On the sheet, there is an air hole for each dome contact and it is essential for good click-feeling. Here you can see its structure:

What are dome arrays? How does a metal dome arrays work?

Double Layer Dome Arrays

Double layer dome arrays add an additional layer to the structure, and attached under the metal dome contacts. The extra layer often serves as a spacer or insulator, which used for improving the tactile response and protecting the underlying circuitry. In addition, air paths between dome arrays helps reduce the chance for PET film being damaged by metal dome contacts’ burr and block dust coming into PET films. This design is particularly beneficial in automotive controls or industrial equipment, where the devices are subjected to harsh conditions and frequent use. Below is its structure and you can see the spacer is under the mylar layer.

EMI Printing Dome Arrays

EMI (Electromagnetic Interference) printing dome arrays are designed to minimize interference in electronic devices. They are similar to the normal metal dome arrays, but with the EMI shielding. These arrays are printed with an EMI shield, which helps in blocking unwanted electromagnetic signals that can disrupt the performance of the device. Electrostatic is gathered on the printed silver paste or silver carbon paste and neutralized. This type of dome array is essential in applications where signal integrity is critical, such as in telecommunications equipment, medical devices, and other high-precision electronic devices.

EMI printing dome arrays can be divided into EMI single layer and EMI double layer. No matter which kind of EMI metal array, the electrostatic is print on the top layer of metal dome arrays. You can see their structure in detail.

Rubber Glue Dome Arrays

Rubber glue dome arrays incorporate a layer of rubber adhesive that holds the domes in place. This design is particularly useful in applications where the dome array needs to be flexible and conform to curved or irregular surfaces. Because material of adhesive is Silicone, so it also named Silicon or Acrylic PSA adhesive tape.

LGF Dome Arrays

The full name of LGF dome array is light guide film dome arrays. It is a new design metal dome array, add a LGF layer on the top of normal dome array. These arrays incorporate a light guide film that distributes light evenly across the surface, making the keys easier to see and use. As everyone knows, the light under keypad is coming from the LED on PCB motherboard. We need to put about 8-10 pieces LED on each board, but if the design changed to use LGF, then we can save several LED, as well as SMT fee.

This type of dome array is commonly used in devices that require backlit keypads, such as smartphones, gaming controllers, and automotive controls. The integration of LGF not only improves usability but also adds a sleek and modern appearance to the device.

Custom Dome Arrays

Custom dome arrays are specifically designed to meet the unique needs of a particular application. These arrays can vary in size, shape, actuation force, and material, depending on the requirements of the device. Customization allows for the creation of dome arrays that are perfectly suited to the intended use, ensuring optimal performance and user experience. Whether it’s for a specialized medical device, an industrial control system, or a unique consumer product, custom dome arrays provide the flexibility to design a solution that meets exact specifications.

Best Technology Metal Dome Arrays Capability

Total Height	0.28-0.45 mm
Travel	0.13-0.30 mm
Scope of Force	100-400 gf
Tolerance of Force	±25 gf
Click Ratio	>30%
Life Cycles	>1 Million Cycles
Salt and Fog Examination	35±2°C, 5±0.1%, 48H
Working Temperature	-20°C-50°C
Working Humidity	Under 100%RH
Touch Resistance	<1 ohm
ESD Resistance	<3 ohm
Dimension Tolerance	±0.05-±0.15mm

Since 2006, we have worked in manufacturing metal dome and dome arrays, though several types of dome arrays are developed in recent year, we have rich experience and mature manufacturing skills in this industry. And there is no doubt that we are one of the leaders of metal dome and dome arrays in Asia or even all the world. We offer custom-built metal domes to fit the exact specifications of your product—our manufacturing facility can custom-cut almost any shape and size.

How Do Dome Structures Work?

Dome structures in general, including those used in dome arrays, work on the principle of load distribution. The dome shape naturally distributes force evenly across its surface, which is why it is commonly seen in architecture and engineering. This same principle is applied in dome arrays, where the dome’s shape ensures that the force exerted by the user is evenly distributed, leading to consistent and reliable performance.

When you press down on a dome, the structure deforms in a controlled manner, allowing for a predictable and repeatable actuation force. The even distribution of force also contributes to the longevity of the dome array, as it minimizes wear and tear on the individual components.

Benefits of Metal Dome Arrays in Membrane Switch

In general, there are five advantages to using metal dome arrays in membrane switches:

Tactile feedback
Durable (1 million + actuations)
Thin and light
Highly customizable
Low cost and good for mass production

Metal Dome Array Use Cases

Metal dome arrays are used in various industries and applications, including:

Consumer electronics
Industrial equipment
Electronic
Automotive
Military
Medical
Agriculture
Transportation
Aerospace
Telecommunications

With our extensive customization options, you can transform any membrane switch into a robust user interface with tactile feedback. Create a product that considers every aspect of user interaction—contact Best Technology for tactile dome array!

Posted in Business | Tagged dome arrays, metal dome, snap dome | Leave a comment

What is Tactile Feedback? Tactile vs Haptic Feedback

Posted on August 22, 2024 by Love Dome

When designing an electronic device, you might be weighing the choice between tactile feedback, resistor or capacitor touch technologies. Although touchscreens have gained popularity, many users still favor the reliability of physical buttons. As more companies adopt resistive or capacitive touch, it’s important to recognize the valuable advantages that tactile feedback can offer.

What Does Tactile Feedback Mean?

Tactile feedback refers to the physical sensation you feel when interacting with a device, such as pressing a button or a key on a keyboard. This sensation lets you know that your action was successful. It’s that “clicky” feel when you type or the slight pressure when you press a button on a touchscreen. Tactile feedback is especially important in devices like keyboards, game controllers, and touchscreens because it gives you a clear signal that your input has been registered.

Tactile feedback is an important aspect of design in user interfaces, particularly in devices that involve touch, such as remote devices, keyboard, keypad. It creates a more engaging interaction between users and their devices, ensuring users can act with confidence when operating keyboards, phones, or other devices.

What is Tactile Feedback? Tactile vs Haptic Feedback

What Are the Benefits of Tactile Feedback?

Despite its simple design and function, tactile feedback offers several important advantages that shouldn’t be underestimated. The most significant benefit is enhanced accuracy. Studies indicate that the average typing speed is 41 words per minute, with an accuracy rate of 92%. Typing errors like missed or duplicate keys are common, but tactile feedback helps reduce these mistakes. The slight vibration you feel through tactile feedback confirms that the key has been successfully pressed and recognized by the device. If the vibration is absent, it signals that the keypress wasn’t registered.

Tactile feedback also boosts user satisfaction. The physical response adds a sense of fulfillment that makes interacting with tactile-enabled devices more enjoyable and rewarding.

What is an Example of Tactile Feedback?

A common example of tactile feedback can be found in mechanical keyboards. When typing on one, you feel a distinct “click” or resistance with every key press, which lets you know the key has been fully pressed. This sensation differs from the smooth, almost imperceptible feel of membrane keyboards, which may not give users as strong an indication of successful key activation. Many prefer mechanical keyboards because the tactile feedback makes typing more comfortable and efficient. Gamers also enjoy tactile feedback, as it helps with quick and accurate inputs during fast-paced gaming sessions.

What is the Difference Between Tactile and Haptic?

The terms “tactile” and “haptic” are often used interchangeably, but they refer to slightly different concepts. Tactile feedback generally refers to the physical sensation or pressure felt through the skin when interacting with a device. It’s the actual feel of pressing a key, clicking a button, or touching a surface.

Haptic feedback, on the other hand, is a broader term that includes tactile feedback but also encompasses other sensations such as vibrations or forces that simulate interaction with virtual objects. Haptic feedback is a more advanced form of interaction that can simulate the sense of touch in more complex ways, including the feel of textures, weights, and motions in virtual environments.

For example, a tactile feedback keyboard gives you a physical response when pressing a key. In contrast, haptic feedback might involve a gaming controller that vibrates when you’re hit in a game, or a virtual reality glove that simulates the feeling of holding an object. Haptic feedback often includes more diverse sensory experiences and is designed to mimic real-world touch more closely.

While both are important, tactile feedback tends to be more focused on confirming simple actions, such as typing, while haptic feedback is more immersive, used in applications like virtual reality, gaming, and medical simulations. Together, these technologies enhance how we interact with devices, making digital experiences feel more physical and realistic.

How to Improve the Tactile Feedback of Metal Dome?

Opt for High-Height Metal Domes

Choose metal domes with a higher profile, such as four-leg domes, domes with a center dimple, or side dimple domes. These types typically provide a stronger and more pronounced click feeling, maintaining their performance even after assembly.

Adjust the Click Feeling Directly

The click feeling, measured by a click ratio (CC), is defined by the equation: CC (%) = (CP-CL)/CP*100%, where CP is the peak force and CL is the load at click. A higher CC score correlates with a more distinct click. However, it’s best to keep the CC score under 70%, as an excessively high click ratio can reduce the lifespan of the metal dome.

Use UV Plunger on Dome Array Surface

Applying a UV plunger to the center of the metal dome array can enhance the click feeling by providing additional support during operation.

Avoid Oversized Silicon Buttons

Large silicon buttons can dampen the click feeling. Keeping the button size appropriate ensures the tactile feedback remains sharp and effective.

Ensure Accurate Dome Array Alignment

During assembly, it’s crucial to align the dome array accurately with the PCB pad. Since the best click response is usually at the center of the dome, any misalignment can diminish the quality of the click feeling.

Integrating tactile feedback into your electronic devices can greatly enhance user experience, offering essential response where touchscreens may not be ideal or could pose safety risks. To discover how metal domes can elevate your product’s performance, reach out to Best Technology today.

Posted in Business | Tagged tactile feedback | Leave a comment

What is keyboard metal dome? Dome switch keyboard

Posted on August 21, 2024 by Love Dome

A keyboard metal dome refers to a small, rounded, metallic component used in dome switch keyboards. These metal domes are typically made from stainless steel and are crucial for the operation of the keyboard.

What is a Dome Switch Keypad?

A dome switch keypad is a type of keyboard that uses metal domes to complete an electrical circuit when a key is pressed. These keyboards are popular due to their balance between comfort, reliability, and cost-efficiency. The metal domes sit beneath the rubber or silicone layer of the keys, providing a tactile response when pressed. This is why they are widely used in various applications, including computers, remote controls, and other input devices.

The metal dome itself acts as the bridge between the keypad and the circuit board. It gives a distinct clicking sound and tactile feedback when a button is pressed. This ensures that the user knows the input has been registered. Compared to other types of switches, dome switch keypads offer good balance of tactile feedback and performance.

Why Use Keypad Metal Dome?

Keypad metal domes are crucial components that significantly enhance the functionality of the keypad. They provide a tactile response, which is essential for people who rely on the sense of touch to confirm a keypress.

When you press a key on a dome switch keyboard, the keycap pushes down on the metal dome, which in turn makes contact with the underlying circuit board, completing the electrical circuit. This action sends a signal to the computer or device, registering the keypress.

Using metal domes has multiple benefits:

Tactile Feedback: Metal domes provide a tactile click when pressed, offering feedback to the user that the keypress has been registered.
Durability: Metal domes are designed to withstand millions of keypresses, making them a popular choice for high-usage environments.
Responsive Feel: These switches provide a snappy, responsive feel, often favored in membrane keyboards and other types of input devices.

Metal Dome Options

Dome plating: can be plated in other metals such as nickel, silver or gold

Dome shapes: four-leg, triangle, round/circle, oblong

Dome sizes: standard sizes are 6mm, 7mm, 8.5mm, 10mm, 12mm, 14mm, 16mm and customized option

Dome forces: standard forces range from 85g to 700g

Other options: dimpled, hole in center (for backlighting key), double-contact closure domes.

What is Dome Actuation Forces?

The actuation force of a dome refers to the amount of pressure required to collapse the dome and complete the circuit. This force is a critical factor in determining how a keypad feels to the user. Actuation force is usually measured in grams and can vary depending on the design and material of the dome.

For example, a lighter actuation force results in a softer press, while a heavier force provides more resistance and a firmer feel. Choosing the right actuation force is important because it affects the overall user experience. A force that is too light might lead to accidental presses, while a force that is too heavy could cause fatigue over extended use.

What is the Most Commonly Used Force Range for Metal Dome?

The most commonly used actuation force range for metal domes falls between 100 and 400 grams. This range provides a good balance between comfort and reliability for most users. Lighter forces, around 100 grams, are often preferred in devices that require quick and frequent inputs, like remote controls. On the other hand, heavier forces, up to 400 grams, are used in applications where preventing accidental presses is critical, such as in industrial machinery controls.

Here is a force range for each type of snap domes:

Metal Domes	Diameter	Force
Round Dome	2.5-6mm	100-200g
Round Dome	>7mm	140-300g
Triangle Dome	4-12mm	100-800g
Four-leg Dome	5-7mm	100-250g
Four-leg Dome	8.4-12.2mm	120-400g

(PS: For round metal dome, when its diameter is larger, the force can even reach 200g to 400g.)

As we know that the force of metal domes is also related to the lifetime. Therefore, the magnitude of force still depends on the customer’s requirement. if the customer has no requirements about the lifetime, we can increase the force at discretion as well.

How Do I Choose the Right Dome for My Keyboard?

Choosing the right dome for your keyboard involves considering several factors, including the type of device, the user’s needs, and the overall design of the keypad. The first step is to determine the level of tactile feedback that is required. If the device is used frequently, a dome with a higher actuation force might be necessary to prevent accidental presses. However, for applications where speed is more important, a lighter dome might be better suited.

Other factors to consider include:

Dome Shape: The shape of the dome affects the feel of the press. Four-legged domes provide stability, while triangular or round domes offer varying levels of precision and softness.
Dome Material: Most metal domes are made from stainless steel, but different finishes can be applied to alter the feel and durability of the dome.
Dome Size: Larger domes tend to provide a softer feel, while smaller domes give more resistance and a firmer press.

Best Technogy – Your Reliable Keyboard Metal Dome Manufacturer

Best Technology is known for producing high-quality metal domes for a variety of applications, including keyboards, remote controls, and other input devices. We offer a wide range of dome options, ensuring that you can find the perfect fit for your device. Whether you need a four-legged dome for stability or a triangular dome for precision, Best Technology has you covered.

With a focus on quality, durability, and customization, Best Technology provides metal domes that meet the unique needs of their clients. If you are looking for a reliable partner for your metal dome requirements, Best Technology is an excellent choice.

Posted in Business | Tagged keyboard metal dome, metal dome switch, snap dome keyboard, switch metal dome | Leave a comment