Membrane keyboard, has front foil with laminate structure on which lamination with metal part e.g. high-grade steel foil, is formed, where metal part possesses ultraviolet and chemical resistance and has thickness of preset value

摘要

The keyboard has a carrier material (2) in form of a carrier foil, and a printed circuit board and/or a metal carrier plate, on which a front foil (3) is arranged. The foil (3) is positioned on the material by a spacer foil (5). The foil (3) has a laminate structure on which a lamination with a metal part e.g. high-grade steel foil (3.3) formed. The metal part possesses ultraviolet (UV) and chemical resistance and has a thickness of 25>=d>=50 micrometer.