COLUMN SHARING 2×2 PIXEL UNIT AND PIXEL ARRAY OF CMOS IMAGE SENSOR

WIPO Patent Application WO/2014/044004

A1

The present invention relates to a column sharing 2×2 pixel unit and a pixel array of a CMOS image sensor. Four pixels are arranged to form a 2×2 pixel array acting as a pixel unit. In each pixel unit, a front column of two pixels and a back column of two pixels each share a selection transistor, a source follower transistor, a reset transistor, and a floating active region in the column. In the two-dimensional pixel array of the CMOS image sensor, for metal connection lines, two layers of metal lines are used for connection, only a 0th layer metal line and a 1st layer metal line are used as device control lines to collect image information, but a 2nd or higher layer metal line is not used as a device control line, so that the height of the medium on the Si surface of a photodiode is decreased, and more light can enter the photodiode, so as to increase the light utilization efficiency and conversion gain of a small-area-pixel sensor, thereby increasing the sensitivity and effectively improving the image quality of the small-area-pixel image sensor.

JPS5724171	SOLID STATE IMAGE SENSOR
JPH01165259	SEMICONDUCTOR PHOTODETECTOR

GUO TONGHUI (CN)
CHEN JIE (CN)
LIU ZHIBI (CN)
KUANG ZHANGQU (CN)
TANG MIAN (CN)

PCT/CN2012/086688

March 27, 2014

December 14, 2012

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SUPERPIX MICRO TECHNOLOGY CO LTD (CN)

H04N5/374

CN102158663A	2011-08-17
CN1835245A	2006-09-20

BEIJING CATALY IP ATTORNEY AT LAW (CN)
北京凯特来知识产权代理有限公司 (CN)

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