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Manufacturing method of cmos image sensor and etching method used therefor

An image sensor and manufacturing method technology, applied in radiation control devices and other directions, can solve the problems of obvious notching and lack of ideal, and achieve the effects of simple implementation, easy promotion, and improved product yield.

Active Publication Date: 2016-01-06
ADVANCED MICRO FAB EQUIP INC CHINA
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Problems solved by technology

However, when applied to the etching process for manufacturing CMOS image sensors, especially when TSV technology is used, the above scheme does not have an ideal effect on the notching phenomenon, and the notching is still relatively obvious, such as figure 2 shown

Method used

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  • Manufacturing method of cmos image sensor and etching method used therefor
  • Manufacturing method of cmos image sensor and etching method used therefor
  • Manufacturing method of cmos image sensor and etching method used therefor

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Embodiment Construction

[0027] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] It should be noted that the embodiments of the present invention can be applied not only to the TSV etching process, but also to other etching processes for manufacturing CMOS image sensors.

[0029] Such as image 3 As shown, the etching method for manufacturing a CMOS image sensor provided by the first embodiment of the present invention includes the following steps:

[0030] S11. Introducing a process gas into the reaction chamber, where the process gas includes an etching gas and a sidewall protection gas.

[0031] Specifically, a workpiece to be processed is placed in the reaction chamber, which is a semiconductor substrate with a pattern of shallow trenches defined therein, for manufacturing a CMOS image sensor. Etching gas including SF 6 and other gases that can cause etching reactions, sidewall protection gases inc...

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Abstract

The invention relates to a manufacturing method and a used etching method of a complementary metal-oxide-semiconductor transistor (CMOS) imaging sensor. The etching method comprises the following steps: blowing manufacture procedure gas into a reaction cavity, wherein the manufacture procedure gas comprises etching gas and side wall protective gas; exerting source power and bias power to the reaction cavity, wherein the bias power varies in an impulse mode; and conducting an etching manufacture procedure and a deposit manufacture procedure in the reaction cavity in an alternate mode, wherein the source power is lower than 2,000 watt. By means of the manufacturing method and the used etching method of the CMOS imaging sensor, the phenomenon of notching can be effectively avoided, product yield can be improved, implementation is simple and popularization is easy.

Description

technical field [0001] The present invention relates to a semiconductor processing and manufacturing method, more specifically, to a manufacturing method of a CMOS image sensor and an etching method used therefor. Background technique [0002] CMOS image sensors can integrate pixel arrays and peripheral circuits on the same chip. Compared with charge-coupled devices, CMOS image sensors have the advantages of small size, light weight, low power consumption, convenient programming, easy control, and low average cost. [0003] In the prior art, the process of forming a CMOS image sensor refers to figure 1 To illustrate. Provide a semiconductor substrate 100 comprising a peripheral circuit area IA and a pixel unit area IB, the pixel unit area IB includes a photodiode area and a driver circuit area; then, a pad oxide layer 101 is formed on the semiconductor substrate 100 by a thermal oxidation method, and the pad oxide The material of the layer 101 is silicon oxide; the barrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/146
Inventor 卞祖洋
Owner ADVANCED MICRO FAB EQUIP INC CHINA
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