Flexible laminated plate for printed circuit - comprises polyamide resin plastic film with copper foil contacts etc., and e.g. cadmium-copper alloy backing layer

摘要

The plate comprises a flexible plastic film of polyamide resin on which a Cu foil is pasted to form contacts, terminals and circuit parts and an elastic metal layer of e.g. Cd-Cu alloy which is applied (partially) to the back side of the plastic film. The plastic film is folded and overlapped to sandwich one face having holes between other faces so as to form a printed circuit plate such as switch plate for a key board of a thin miniaturised electrocomputor. Then, the whole or only contact parts on the back side of the film face are coated with the elastic metal layer. The plate has the strength against the folding damage and deformation and may be used to produce the key board of a miniaturised electrocomputor which is of thin construction and long life.