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Digitizer tablet having electrical interconnect components on the writing substrate

  • US 4,859,813 A
  • Filed: 09/04/1987
  • Issued: 08/22/1989
  • Est. Priority Date: 09/04/1987
  • Status: Expired due to Fees
First Claim
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1. A digitizing tablet for use with a stylus and digitizing circuit generating signals representative of the position of the stylus on the digitizing tablet, the digitizing tablet comprising:

  • (a) a rigid substrate of dielectric material having a first, writing side over which the stylus is to be disposed, and a second, underside opposite said writing side;

    (b) grid conductors disposed on said rigid substrate underside, said grid conductors including a first and second set of parallel, spaced apart conductors, said first and second sets of conductors disposed at any angle to each other said grid conductors formed of electrically conductive ink;

    (c) a layer of dielectric ink applied on said rigid substrate at least between the points said first and second grid conductors intersect; and

    (d) an electrical interconnect means on said rigid substrate integral with said grid conductors to provide a conductive path between said grid conductors and the digitizing circuit.

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