Metal domes (named stainless steel domes, or tactile metal domes), are momentary switch contacts that, when used in conjunction with a printed circuit board, flex circuit, or membrane, become normally-open tactile switches.
The metal domes play an significant role in connecting circuits. Therefore, if the metal dome was broken, your electronic products would be destroyed because you choose a wrong metal dome. As a premier expert in metal dome, Best Technology would like to give you several tips about how to choose metal domes.
- Choose Metal Domes with Long Life
The life of the four-leg metal dome only has 200 thousand to 300 thousand times, but the life in the range of 50 thousand to 1 million times is very few. When it comes to the circle metal dome, such as the domes with 4mm or 5mm dimples, the life of them is 700 thousand to 800 thousand times.
- Choose the Most Suitable Material for Your Metal Domes
It is not advisable to choose the materials according to the price. If the material is not suitable, then it will easily cause the case like this: the metal dome can not rebound when it is pressed. It is hard to find with naked eyes and it can only be found by testing.
- Consider the Force of Metal Domes
The customers are strict with the force of metal domes, that is, the force should be evenly distributed. Meanwhile, the force should be controlled in a range of tolerance (±20gf).
- Consider the Outline of Metal Domes
We should pay attention to the outline of metal domes whether there are any dislocation of the dimple, dirt, crush etc.. If you choose the metal dome without a dimple, the contact surface between the metal dome and circuit is relatively large. In case of the dust entering, the rate of poor conductivity of metal domes will increase.
The metal dome with dimple only the dimple contact with the circuit. The dust will be left around the dimple instead of on the dimple if there are dusts entering. If there are dusts on the dimple, then you can press the metal dome for several times to make the dust fall off. In this way, it will decrease the rate of poor conductivity of metal domes.
Best Technology is headquartered in Shenzhen China. We have a dedicated team of engineers always striding for the best quality products and services. Therefore, with the rich experience, we are able to tell you how to choose the best metal dome for your electronic products. If you would like to find out more about what makes Best Technology different from our competitors, give us a call at 0755-29091601 or view our website: https://www.metal-domes.com.