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Stylus input capacitive touchpad sensor

  • US 5,942,733 A
  • Filed: 10/19/1995
  • Issued: 08/24/1999
  • Est. Priority Date: 06/08/1992
  • Status: Expired due to Term
First Claim
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1. A capacitive touch pad comprising:

  • a rigid substrate having first and second opposing faces;

    an X-trace layer having a plurality of first parallel conductive traces running in a first direction, said first parallel sensing conductive traces lying in a plane parallel to said first face of said substrate, said X-trace layer disposed on said first face of said substrate;

    a Y-trace layer having a plurality of second parallel sensing conductive traces running in a second direction orthogonal to said first direction, said second parallel sensing conductive traces lying in a plane parallel to said second face of said substrate, said Y-trace layer disposed on said second face of said substrate;

    a layer of compliant material disposed said substrate;

    a layer of conducting material disposed on an upper surface of said layer of compliant material; and

    a protective layer disposed on an upper surface of said layer of conducting material.

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