Pixel structure, image sensor using such pixel structure and cor

Details Pixel structure, image sensor using such pixel structure and cor Pixel structure, image sensor using such pixel structure and cor

1996-04-18

1999-08-03

Garber, Wendy

Television

Camera, system and detail

Solid-state image sensor

348308, H04N 314

Patent

active

059331909

ABSTRACT:
A pixel structure for CMOS imaging applications, the pixel structure including a photosensitive element, a load transistor in series with the photosensitive element, a first reading transistor, coupled to the photosensitive element and to the load transistor, for reading out signals acquired in the photosensitive element and converting the signals to a voltage drop across the load transistor. The gate length of at least the load transistor is increased by at least 10% compared to a gate length of transistors manufactured according to layout rules imposed by a CMOS manufacturing process, thereby increasing the light sensitivity of the pixel structure.

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"A Single Chip Sensor & Image Processor for Fingerprint Verification" Anderson, S., et al., IEEE Custom Integrated Circuits Conference, May 12-15, 1991.
"Pixel Structure with Logarithmic Response for Intelligent and Flexible Imager Architectures" Dierickx, N. Ricquier, Microelectronic Engineering, vol. 19, No. 1-4, Sep. 1992.

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