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Biometric sensing device with isolated piezo ceramic elements

  • US 20040140735A1
  • Filed: 07/29/2003
  • Published: 07/22/2004
  • Est. Priority Date: 03/23/2000
  • Status: Abandoned Application
First Claim
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1. An apparatus for sensing biometric information in a finger, comprising:

  • an array of discrete piezo ceramic elements responsive to acoustic characteristics of parts of the finger; and

    filler distributed between said discrete piezo ceramic elements, said filler providing acoustic attenuation and electric isolation between said discrete piezo ceramic elements.

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