Shielded switch

Details Shielded switch Shielded switch

H - Electricity

05

K

H05K 9/00 (2006.01) H03K 17/98 (2006.01) H04B 15/02 (2006.01) H04M 1/03 (2006.01) H04Q 7/32 (2006.01) H05K 1/02 (2006.01)

Patent

CA 2160751

An EMI shielded keypad (10) or switch for a radiotelephone (50) has a non-conductive cover (12) attached to a printed circuit board (PCB) (14). The PCB (14) has a ground pad (20) and a plurality of metal traces (26) on a first surface (16) that attaches to the cover (12). The cover (12) is made of a flexible, preferably clear material, such as mylar and has a dimple (28) centered over the ground pad (20). A bubble (30) is centered over the plurality of conductive traces (26). A conductive coating (32) is selectively applied to the mating surface (34) of the cover (12), so that the conductive coating (32) in the bubble (30) is electrically isolated. By pressing on the bubble (30) electrically contact is established between the plurality of traces (26), thus the bubble and the traces (26) define a switch.

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