Keypad

Abstract

A manufacturing method for a keypad is provided. First, a patterned thin plastic sheet, which includes a first surface and a second surface, is provided. A plurality of touch buttons which can be operated independently are included. The touch buttons have a plurality of hollow patterned structures on them. Later, a metal layer is formed on the first surface of the patterned thin plastic sheet and on the sidewalls of the hollow patterned structures. Thereafter, an adhesion enhancing layer is added onto to the second surface of the patterned thin plastic sheet. Later, a colored layer is formed on the adhesion enhancing layer. Finally, a protruding point layer is formed on the adhesion enhancing layer, and is covering the colored layer. The protruding point layer has a plurality of protruding points with positions corresponding to the touch buttons respectively.

Dependencies are inferred from the claim text.