Membrane switch

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A membrane switch is an electrical switch for turning on and off a circuit. It differs from a mechanical switch, which is usually made of copper and plastic parts: a membrane switch is a circuit printed on a PET or ITO. The ink used for screen printing is usually copper / silver / graphite filled and therefore conductive.

The ASTM defines a membrane switch as a momentary switch device in which at least one contact is on, or made of, a flexible substrate.

[edit] Usage

Use in any electrical appliances in which the rebouncing feeling is not important. Classic applications includes microwave oven panel, air conditioner control panel, TV remote control etc. Tactile feedback of keys can be provided by embossing the top PET layer or embedding metal snap domes.

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