There are usually four different types of membrane switch keypads, 1, PET membrane switch, 2, FPC membrane switch, 3, PCB membrane switch, 4, silicone keypad membrane switch.
1, PET membrane switch
The upper circuit and lower circuit layers of the PET membrane switch are made of thick ( and thickness can be used in special cases) polyester membrane (PET) with excellent toughness, screen-printed conductive silver paste and conductive carbon paste, and dried A circuit with conductive function. PET membrane switch is an ordinary membrane switch.
membrane switch
The difference between FPC membrane switches and ordinary membrane switches is that the circuit is no longer a silver paste printed circuit, but a more stable FPC circuit material, which is more resistant to high temperatures and corrosion. FPC membrane switch circuit layer uses FPC flexible circuit board. This circuit has high precision, minimum output spacing of , low resistance value, more stable circuit func
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