Keysheet module

Details Keysheet module Keysheet module

2006-01-03

2006-01-03

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Membrane type

C200S515000, C200S406000

Reexamination Certificate

active

06982394

ABSTRACT:
The keysheet module has a flexible printed circuit board formed with dome-shaped depression switches on the upper surface thereof. Each of the depression switches comprises a first fixed contact, a second fixed contact surrounding the first fixed contact, a movable contact arranged over these fixed contacts to electrically connect and disconnect the first fixed contact and the second fixed contact, and a switch holding sheet arranged on the flexible printed circuit board to cover and hold the movable contact. An insulating film of an insulating paste is formed on the flexible printed circuit board in such a way that it has air holes formed therein to release air trapped in the movable contact. The switch holding sheet is arranged over the insulating film.

REFERENCES:
patent: 5924555 (1999-07-01), Sadamori et al.
patent: 6259046 (2001-07-01), Iwama et al.
patent: 6548778 (2003-04-01), Takahashi
patent: 6593537 (2003-07-01), Teruyama et al.
patent: 6604278 (2003-08-01), Sera et al.
patent: 6730869 (2004-05-01), Teruyama et al.
patent: 6768074 (2004-07-01), Iwama
patent: 2001-038305 (2001-02-01), None
patent: 2002-17457 (2002-06-01), None

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