Method for eliminating bridging in contact hole technique

Abstract

The invention relates to a method for eliminating bridging in a contact hole technique, which provides a cleaning menu comprising a plurality of adaptive protective film deposition technical steps. A laminated adaptive protective film is formed on the side wall of the chamber of HDP CVD (high-density plasma chemical vapor deposition) equipment; and the laminated adaptive protective film with favorable adhesiveness, compactness and uniformity can protect the side wall of the chamber of the HDP CVD equipment from damage of plasma, avoids the generation of defective granules, enhances the yield of the HDP CVD technique, and eliminates the phenomenon of bridging in the contact hole technique.

Description

technical field [0001] The invention relates to the field of semiconductor integrated circuit manufacturing, in particular to a method for eliminating contact bridges in a contact hole process. Background technique [0002] Semiconductor integrated circuits are moving forward with the schedule predicted by Moore's Law, the feature size of the device is developing towards a small-scale structure, and the integration level is continuously improving. With the continuous miniaturization of feature size, the integration level of a single chip has reached as high as 10 8 ~10 9 , and at the same time, the requirements for the production process are getting higher and higher, therefore, it becomes very critical to reduce the size and density of defects in the manufacturing process. A 1-micron dust on a transistor with a size of 100 microns may not be a problem, but for a 1-micron transistor, it will be a fatal defect that causes device failure, so it is especially proposed for che...

AI Technical Summary

Problems solved by technology

Due to the storage of the bridge part 18, a plurality of contact plugs 17 are bridged and short-circuited, causing a circuit failure

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