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Silicone Rubber Keypads - Electrical

Examples of Silicone Rubber Keypads design options: electrical

Many applications incorporate silicone rubber keypads as a primary or secondary switching layer, relying on key depression points to provide sound electrical contact.

In many cases the Silicone Rubber Keypad is designed to fit as part of a PCB assembly, with the contact electrodes being configured on the circuit board.

Conductive pills, using materials such as carbon or gold, offer low resistance contact points - less than 150 ohms. Pill sizes range from 2mm to 10mm in 0.5mm increments.

Conductive printing provides an alternative for larger, or shaped contact points. This technique is particularly useful when LED illumination is being applied through keys.

When combining keypads with polydome arrays, or similar devices, the contacts points are normally printed with silver or carbon.

PCB contact electrodes are normally configured with a finger design ensuring positive contact is still made when key depression is uneven.

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