KEYBOARD SWITCH ASSEMBLY WITH MULTILAYER, COEXTENSIVE CONTACTOR MEANS

摘要

A keyboard structure which includes a circuit board or the like having a plurality of contacts, an insulator layer having a plurality of holes therethrough, said holes positioned above said board to expose said contacts, composite means comprising an electrically non-conductive elastomeric layer having adhered thereto and covering a major portion of one side thereof, a thin flexible electrically conductive non-selfsupporting and non-elastomeric plastic layer having electrically conductive particles dispersed therethrough, and means for pushing the non-conductive layer and the conductive layer through said holes to make electrical contact with contacts.