Authentication system having a flexible imaging pressure sensor

Details Authentication system having a flexible imaging pressure sensor Authentication system having a flexible imaging pressure sensor

2005-06-28

2008-08-12

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to multiple loads or load components

C073S862041, C073S862042, C073S862043, C073S862044, C073S862045

Reexamination Certificate

active

07409876

ABSTRACT:
A sensor for a textured surface (e.g., a fingerprint) is provided. The sensor includes a flexible substrate and a flexible membrane supported above the substrate by one or more spacers. The sensor also includes multiple pressure sensor elements responsive to a separation between parts of the membrane and corresponding parts of the substrate. The membrane is conformable to the textured surface being sensed, so the variation in separation between substrate and membrane is representative of the textured surface being sensed. Such pressure sensors can be included in fingerprint authentication subsystems including associated integrated electronic circuitry (e.g., encryption, image processing, fingerprint matching, communication and/or location determination circuitry). Such subsystems can be included in various access control systems (e.g., smart cards and mobile electronics). Unpackaged IC chips can be included on the flexible substrate or can be disposed on a separate electronics substrate attached to the sensor.

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