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Pressure-sensitive pad and production thereof

  • US 5,541,370 A
  • Filed: 07/28/1994
  • Issued: 07/30/1996
  • Est. Priority Date: 01/30/1992
  • Status: Expired due to Term
First Claim
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1. A writing pad comprising a pair of substrates each having an electrode formed on one of the surfaces, the pair of substrates being disposed in parallel in such a way that the electrodes face one another with a predetermined gap between the substrates by means of a plurality of insulating dot spacers,wherein a height (G) of the dot spacers is not greater than 15 μ

  • m, a diameter (d) of the dot spacers on the electrode surface to which the dot spacers are fixed is d>

    G, and an average center distance (L) between the adjacent dot spacers is not greater than 100 μ

    m and 3 d<

    L<

    100 d,and further wherein, when the tip of an input pen for depressing either of the substrate has a radius of curvature (R μ

    m), the average center distances (L) of the dot spacers satisfy the following relationship;

    
    
    space="preserve" listing-type="equation">L≦

    R/nwherein n is a positive integer of 4 or greater.

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