Finger biometric sensor with sensor electronics distributed over thin film and monocrystalline substrates and related methods
First Claim
1. A finger biometric sensor comprising:
- a thin film substrate;
a thin film transistor (TFT) layer on said thin film substrate;
an array of electric field sensing electrodes adjacent said TFT layer for receiving a finger adjacent thereto;
said TFT layer comprising a plurality of TFTs defining a respective TFT amplifier stage for each electric field sensing electrode;
a finger excitation electrode for applying an electric field to the finger; and
at least one integrated circuit adjacent said thin film substrate comprisinga monocrystalline substrate, andprocessing circuitry adjacent said monocrystalline substrate and connected to said TFT amplifier stages.
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Accused Products
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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Citations
25 Claims
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1. A finger biometric sensor comprising:
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a thin film substrate; a thin film transistor (TFT) layer on said thin film substrate; an array of electric field sensing electrodes adjacent said TFT layer for receiving a finger adjacent thereto; said TFT layer comprising a plurality of TFTs defining a respective TFT amplifier stage for each electric field sensing electrode; a finger excitation electrode for applying an electric field to the finger; and at least one integrated circuit adjacent said thin film substrate comprising a monocrystalline substrate, and processing circuitry adjacent said monocrystalline substrate and connected to said TFT amplifier stages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for making a finger biometric sensor comprising:
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forming a thin film transistor (TFT) layer on a thin film substrate, the TFT layer comprising a plurality of TFTs defining a plurality of TFT amplifier stages; forming an array of electric field sensing electrodes adjacent the TFT layer for receiving a finger adjacent thereto, each electric field sensing electrodes being associated with a respective TFT amplifier stage; forming a finger excitation electrode for applying an electric field to the finger; positioning at least one integrated circuit adjacent the thin film substrate, the at least one integrated circuit comprising a monocrystalline substrate processing circuitry adjacent the monocrystalline substrate; and connecting the processing circuitry to the TFT amplifier stages. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification