Keyboard and membrane switch for keyboard

Details Keyboard and membrane switch for keyboard Keyboard and membrane switch for keyboard

2008-07-01

2008-07-01

Friedhofer, Michae A (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Membrane type

C200S520000

Reexamination Certificate

active

07394039

ABSTRACT:
A disclosed keyboard includes a housing with a base member, a top plane member, and a membrane switch installed inside the housing. The membrane switch has a first resin sheet, a second resin sheet, and a spacer resin sheet arranged between the first and second resin sheets. The membrane switch includes a UWB flat antenna that has an antenna element pattern formed on the first resin sheet, a microwave transmission line extending from the antenna element pattern, and a ground pattern arranged in a position facing the antenna element pattern.

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