Importance

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Abstract

A manufacturing method of (1) a decorative and transparent key top made by layering of an inorganic thin membrane 5, which has a membrane thickness between 2 nm and 500 nm and 70% or more of visible rays transmittance, on the surface or back side of the resin-made key top 3, characterized by rainbow-colored luster, assembled in a push-button switch of handy telephone tools, handy terminal apparatuses, remote controllers of home electronic goods, card-type remote controllers, and various keyboards, and yielding the absence of striped pattern and irregular color tone, letters and the presence of symbols easy to look, and even, thick, rainbow-colored luster with beautiful, high-class appearance, (2) of a decorative and transparent key top characterized by layering of high-polymer protecting membrane 6 with a thickness between 5 .mu.m and 60 .mu.m on an inorganic thin membrane 5, and (3) of a decorative and transparent key top by forming an inorganic thin membrane 5 having a membrane thickness of 2 nm.about.500 nm and 70% or more transparency of visible rays on the surface and/or back side of a molded resin-made key top 3 or on the base material 11 made of high-polymer material by physical or chemical vacuum evaporation method by dropping unhardened liquid resin to react and harden, and (4) a manufacturing method of a decorative and transparent key top by forming a high-polymer protecting membrane 6 with a membrane thickness between 5 .mu.m and 60 .mu.m by layering of unhardened, liquid resin on an inorganic thin membrane 5 to harden.

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First Claim