Membrane keyboard and method of formation thereof

Details Membrane keyboard and method of formation thereof Membrane keyboard and method of formation thereof

1980-09-22

1983-05-03

Grimley, A. T.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

29622, 200159B, H01H 900

Patent

active

043821650

ABSTRACT:
A membrane keyboard and method of formation thereof is presented in which the spacing and insulation between fixed and movable circuit layers is achieved by a dielectric material screened or otherwise applied to one of the circuit layers in a predetermined pattern. The dielectric pattern has openings to permit electrical contact between layers, and the dielectric pattern includes a discontinuous pattern of dielectric material on at least one of the contact elements to maintain separation between the contacts while still permitting actuation of the device.

REFERENCES:
patent: 4017697 (1977-04-01), Larson
patent: 4317013 (1982-02-01), Larson
patent: 4336529 (1982-06-01), Buan

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