Finger biometric sensor with sensor electronics distributed over thin film and monocrystalline substrates and related methods
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United States of America Patent
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Nov 10, 2009
Grant Date -
May 26, 2005
app pub date -
Sep 24, 2004
filing date -
Sep 24, 2003
priority date (Note) -
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Abstract
A finger biometric sensor may include a thin film substrate, a thin film transistor (TFT) layer on the thin film substrate, and an array of electric field sensing electrodes adjacent the TFT layer for receiving a finger adjacent thereto. The TFT layer may include a plurality of TFTs defining a respective TFT amplifier stage for each electric field sensing electrode. The sensor may further include a finger excitation electrode adjacent the array of electric field sensing electrodes, and at least one integrated circuit adjacent the thin film substrate. The integrated circuit may include a monocrystalline substrate and processing circuitry adjacent the monocrystalline substrate and connected to the TFT amplifier stages.
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