Importance

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Abstract

The present invention provides a pressure based fingerprint image capture device that includes an array of cantilevers or simply suspended bridges, with each pressure based sensor having a cantilever or a simply suspended bridge in contact with a conducting electrode that deforms under the load applied by the localized ridge on the fingerprint, and which provides contact to another conducting electrode thereby closing the electrical circuit, a switch in the simplest form, and providing a 'pulse' response from the sensor. In the quiescent state, each cantilever or simply suspended bridge structure contains an upper electrode which forms one part of the switch, while another conducting layer, the lower electrode at the bottom of the well of the individual sensor, forms the other part of the switch.

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First Claim