This is concerned with a switch device which is quite thin and can be used on either a flat or a contoured surface that includes a backing member which may be dimensionally stable, either as a flexible or a stiff membrane, with a flexible membrane spaced therefrom by a flexible filled adhesive material providing one or more openings so that a circuit pattern on the backing member is spaced from a conductive shorting bar on the flexible membrane such that manual or mechanical deformation of the membrane will cause electrical conduction across or between the contacted surface in the circuit pattern with deformation being provided by the flexibility of the membrane, as well as deflection or flexing of the intermediate adhesive material.