3rd.: Silicon/ Rubber Membrane Keyboard

1. Top silicon /rubber membrane keyboard with various treatment
2. Circuit layer can be FPC (Copper Flexible Circuit), PCB (Rigid PCB), PET (polyester)
3. Rear adhesive: 3M, Nitto, Tesa, Sony
4. Circuit assembly with light guide film, EL film, OCA film, LED, resistor, Capacitor etc.