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Keypad

  • US 7,119,296 B1
  • Filed: 09/08/2005
  • Issued: 10/10/2006
  • Est. Priority Date: 06/29/2005
  • Status: Expired due to Fees
First Claim
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1. A keypad, comprising:

  • a patterned thin plastic sheet, having a first surface and a second surface, and the patterned thin plastic sheet comprising a plurality of touch buttons that are independently operated, wherein a plurality of hollow patterned structures are on the touch buttons;

    a metal layer, disposed on the first surface of the patterned thin plastic sheet and on the sidewall of the hollow patterned structures;

    an adhesion enhancing layer, disposed on the second surface of the patterned thin plastic sheet;

    a colored layer, disposed on the adhesion enhancing layer; and

    a protruding point layer, disposed on the adhesion enhancing layer and covering the colored layer, wherein the protruding point layer has a plurality of protrusions and positions of the protrusions correspond to the touch buttons respectively.

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