2017-04-30 · Hardy Ho
Silicone Rubber Keypad & Keyboard have many conductive ways, like carbon pills, conductive ink printing, metal domes, nickles pills, copper & golden pills.
Different conductive ways have different features and applications.
Black Carbon Pills:
Features: Common keypad's conductive ways, Lower Resistance, Stable Performance, Long life time and Cheapest Unit Cost. Rounded Carbon Pills is common
Disadvantage: Conductive Shape Limited.

Conductive Ink Printing:
Features: Common keyboard's Conductive Ways,
Not condutive shape limited, Cheapest Unit Cost.
Disadvantage: Resistance Limited, mainly above 50 Ohms (mainly depends on conductive ink materials)


Metal Domes:
Features: Lower resistance, Common keyboard's Conductive Ways,
Disadvantage: Bad Tactile Feel, Without Dust Free Functions


Metal Pills: Copper & Golden Pills
Features: Lowest Resistance, Stable Performance, long life time.
Mainly used in Automobile Products
Disadvantage: Lower Production Efficiency, Expensive Unit Cost


Nickles Pills: Conductive Rubber + Nickle
Features: Lowest Resistance, Stable Performance, long life time.
Mainly used in Automobile Products
Disadvantage: Expensive Unit Cost
