Active pixel sensor having two wafers

Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit

Reexamination Certificate

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C257S292000

Reexamination Certificate

active

07858915

ABSTRACT:
A vertically-integrated image sensor includes a sensor wafer connected to a support circuit wafer. Each pixel region on the sensor wafer includes a photodetector, a charge-to-voltage conversion mechanism, a transfer mechanism for transferring charge from the photodetector to the charge-to-voltage conversion mechanism, and a reset mechanism for discharging the charge-to-voltage conversion mechanism. The support circuit wafer includes an amplifier and other support circuitry for each pixel region on the sensor wafer. An inter-wafer connector directly connects each charge-to-voltage mechanism on the sensor wafer to a respective gate to an amplifier on the support circuit wafer.

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