Membrane switch element with coated spacer layer

Details Membrane switch element with coated spacer layer Membrane switch element with coated spacer layer

1987-11-17

1989-01-03

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

29846, 174 685, 200292, 361398, H01H 1370, H05K 100, H05K 300

Patent

active

047958618

ABSTRACT:
An open-contact membrane switch element (1,2) comprising a plastic film substrate (10) carrying a first conductive circuit (13), a dielectric coating (30) applied to cover the circuit (13) on the substrate (10) in a pattern defining uncoated zones (31,32,34) around each contact (14-17) of the circuit (13), and a second conductive circuit (35) applied on the dielectric coating (30) and having conductive tracks (36,37) electrically interconnected at the uncoated zones (31,32,34) to portions of the contacts (14-17) of the first conductive circuit (13).

REFERENCES:
patent: 3683105 (1972-08-01), Shamash et al.
patent: 3913223 (1975-10-01), Gigoux
patent: 3968336 (1976-07-01), Johnson
patent: 3996430 (1976-12-01), Eberwein et al.
patent: 4127740 (1978-11-01), La Marche
patent: 4320573 (1982-03-01), Larson
patent: 4382165 (1983-05-01), Balash et al.
patent: 4385215 (1983-05-01), Lemberg
patent: 4414452 (1983-11-01), Denley
patent: 4647729 (1987-03-01), Collar et al.

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