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Gentle-bevel flat acoustic wave touch sensor

  • US 5,739,479 A
  • Filed: 03/04/1996
  • Issued: 04/14/1998
  • Est. Priority Date: 03/04/1996
  • Status: Expired due to Term
First Claim
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1. An acoustic wave touch sensor comprising:

  • a substrate, having a front surface, and a bevel having an edge and an angle with respect to said front surface; and

    an acoustic wave transducer, mounted to said substrate to electrically transduce an acoustic wave, having a wavelength and traveling in said substrate,said edge having an effective radius which is small as compared to said wavelength and a bevel angle such that a portion of said acoustic wave is attenuated by less than about 3 dB on transmission through a region of said substrate proximate to and crossing said edge.

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