Apparatus and method for protecting fingerprint sensing circuitry from electrostatic discharge
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United States of America Patent
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Jan 31, 2012
Grant Date -
Oct 30, 2008
app pub date -
Apr 30, 2007
filing date -
Apr 30, 2007
priority date (Note) -
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Abstract
A fingerprint sensor in accordance with the invention includes a non-conductive substrate providing a first surface onto which a user can apply a fingerprint to be sensed. A sensor circuit is applied to a second surface of the non-conductive substrate opposite the first surface to sense a fingerprint when juxtaposed proximally thereto. An electrostatic discharge conductor is applied to the non-conductive surface and is located between an area where a fingerprint is swiped and the sensor circuit. The electrostatic discharge conductor discharges electrostatic charge resulting from a user swiping a fingerprint across the first surface.
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