When we inspect the metal domes, we always see there are some domes designed with dimples in its central while some domes don’t have a dimple, do you know why? And when to choose metal dome with dimples? Let’s get started to explore.
What is a dimple?
Dimples refer to the small indentations found on the surface of some metal domes. These indentations alter the distribution of stress during actuation, affecting the overall tactile response and feel of the dome. Dimples can be strategically placed in different configurations to achieve specific performance characteristics.
The original reason for dimpled domes was to reduce or eliminate the “tease” effect. In the activation of a dome when you feel the click, it does not necessarily mean the dome has bottomed out (reached the circuit). The dimple as I said reduces the tease. That said as dome technology has improved – that reason for the dimple is negated or negligible.
(Four-leg metal domes with dimple)
Key differences between dimple and non-dimple metal domes
When comparing dimples and non-dimples metal domes, it’s essential to consider the specific requirements of your application. Here are some key points of comparison for your consideration.
1.Conduction stability
The biggest difference is the conduction stability. The metal dome with dimple has a better conduction stability than that of no dimple metal dome. In the using process of no dimple metal dome, if there is dust on the contact side of metal dome, the dust will block the conduction, for which the no dimple metal dome is contact with PCB pad surface to surface. As for the metal domes with dimple, there is dimple to contact with PCB pad. As long as the dust do not exist on the dimple, it will not affect the conduction. And if the dust is on the dimple, you can press the dome several times, then the dust will fall off. Therefore, the conduction stability of domes with dimple is better than that of domes with no dimple.
2.Tactile Feel
Dimpled metal domes are known for their pronounced tactile feedback. The presence of the dimple in the center of the dome creates a distinct snap or click sensation when pressed. This tactile response is more noticeable and provides a clear indication to the user that the switch has been actuated. It can help users to quickly and accurately register each keystroke, resulting in improved typing speed and reduced errors.
On the other hand, non-dimpled metal domes offer a smoother and softer tactile feel. The absence of a dimple means that the dome surface is relatively flat or slightly convex. When pressed, non-dimpled domes provide a gentler tactile response compared to their dimpled counterparts.
3.Actuation Force
The presence of the dimple helps to distribute the force evenly across the dome structure, resulting in a more uniform actuation force across multiple switch locations, while non-dimpled metal domes may exhibit slight variations in actuation force. Though these variations in force may be minimal, they can be perceived by users who are sensitive to inconsistencies or have a preference for a more uniform feel.
Which one is best for your application?
Both dimple metal dome and non-dimple dome has their pros and cons, so how to select a right one for your project? After a lot of market surveys, we found dimpled metal domes are always popular in various industries and devices while non-dimpled metal domes are preferred in certain applications, below are some common applications for them.
Dimple metal dome
- Keyboards and Keypads
- Remote Controls
- Automotive Controls
Non-dimple metal dome:
- Consumer Electronics
- Medical Equipment
- Industrial Controls
Why Best Technology?
At Best Technology, we take pride in our strong R&D team and state-of-the-art equipment, allowing us to deliver high-quality products and fast delivery services. With over 16 years of experience in the industry, we have established a stable raw material supply chain and assembled a highly skilled manufacturing team. We are confident in our ability to provide excellent service to our customers. If you are in need of metal domes, please don’t hesitate to reach out to us. We warmly welcome your inquiries.
