Method for manufacturing deep trench isolation grid structure

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United States of America

PATENT NO 12040339
SERIAL NO

17385430

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Abstract

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The present disclosure provides a CMOS image sensor and a pixel structure thereof, and a method for manufacturing a deep trench isolation grid structure in the pixel structure. The method for manufacturing the deep trench isolation grid structure comprises: depositing a first isolation layer and a second isolation layer sequentially on the side walls and bottom surface of each deep trench; and depositing a third isolation layer that fills each deep trench on the upper surface of the second isolation layer, so that the first isolation layer, the second isolation layer and the third isolation layer in the plurality of deep trenches constitute the grid. The deep trench isolation grid structure formed by the method can effectively reduce electrical crosstalk between adjacent grid lines, thereby improving the device performance of the CMOS image sensor which is built upon the deep trench isolation grid structure and the pixel structure thereof.

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Patent Owner(s)

Patent OwnerAddress
SHANGHAI HUALI MICROELECTRONICS CORPORATION568 GAOSI ROAD SHANGHAI ZHANGJIANG HIGH-TECH PARK PUDONG DISTRICT SHANGHAI 201203

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Peng, Xiang Shanghai, CN 45 1240
Xia, Xiaofeng Shanghai, CN 8 2

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