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How to design electronic products of FPC by keypad?

Release date:2021-12-15


How to design electronic products of FPC by keypad? Such as too narrow, positioning hole distribution is not reasonable, and so on and so forth. If according to the requirements of the production of FPC according to the keypad, will cause the FPC by keypad location is not good, the problem such as eccentric, and buttons using bad phenomenon.

FPC by keypad design problems:

1 the column on the KEYPAD and the PCB surface problems, big deviation. There is a problem to change the design.

2 FPC according to the requirements of gold-plated ring on the keypad: 4 the size of the DOME: requirements outer ring, inner ring 4.8 1.8 solid circle; 5 the size of the dome: outer ring, inner ring 5.8 2 solid circle. Outer ring, internal ring size small solid circle, shrapnel and PCB gold point contact area is small, can cause poor contact. Inner ring real heart circle size is too big, can cause too sensitive, also can have Chang Tong phenomenon.

DomeSheet and FPC and the existence question, it is recommended to use with paste, try to make the design of location hole in the product of the diagonal position, ensure the paste position. FPC by keypad to carefully check the drawings, there is a problem in a timely manner the changes; Strictly control the process, strengthen self-check mutual inspection.