COLUMN SHARING PIXEL UNIT AND PIXEL ARRAY OF CMOS IMAGE SENSOR

Title:

COLUMN SHARING PIXEL UNIT AND PIXEL ARRAY OF CMOS IMAGE SENSOR

Document Type and Number:

WIPO Patent Application WO/2014/044003

Kind Code:

A1

Abstract:

A column sharing pixel unit and a pixel array of a CMOS image sensor. Two column pixels form a set of pixel units. Two pixels share a selection transistor, a source follower transistor, a reset transistor, and a floating active region in the column. Multiple sets of pixel units are arranged in the vertical and horizontal directions to form a two-dimensional pixel array. In the two-dimensional pixel array, two layers of metal connection lines are used for connection. For the metal connection lines, only a 0th layer metal connection line and a 1st layer metal connection line are used as device control lines to collect image information, but a 2nd or higher layer metal connection 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.

Inventors:

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

Application Number:

PCT/CN2012/086673

Publication Date:

March 27, 2014

Filing Date:

December 14, 2012

Export Citation:

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Assignee:

SUPERPIX MICRO TECHNOLOGY CO LTD (CN)

International Classes:

H04N5/374; H01L27/146

Foreign References:

CN102158663A	2011-08-17
CN102595057A	2012-07-18
US5955753A	1999-09-21
CN101292515A	2008-10-22

Attorney, Agent or Firm:

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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