Abstract: The plastic membrane keypad key structure usually has four layers, the top is the center of a raised rubber pads, the following three are plastic film.

Plastic membrane keypad structure

Key structural plastic membrane keypad usually has four layers, the uppermost layer is the center of a raised rubber pad, the following three are plastic film. Wherein the upper and lower layers of plastic film with a conductive paint printed circuit, and in the key position just below one to one contact, the middle layer of the isolation layer, through contact with the spacer layer in the form of dots cases signal. The plastic membrane keypad buttons have a lower cost due to the architecture, life is moderate, feel good, etc., thus becoming the market mainstream products selected keyboard architecture.

With plastic membrane keypad is inseparable several keycap architecture design, you can roughly summarized as crater architecture, T architecture and scissors architecture.

Wherein the crater keyboard architecture is on the market most commonly used product design, architecture keycaps crater after crater direct insertion of a rubber pad support, the key process is about 3.80mm ~ 4.0mm. The advantage of this architecture is that the low cost, simple process, and has a waterproof function, but because only a strong point keycap rubber pad's sake, therefore keycap easy shaking, finger tapping requires just fall keycaps Central to get the best feel, and feel will change over time, the noise is thus obvious.