Semiconductor device manufacturing: process – Coating with electrically or thermally conductive material – To form ohmic contact to semiconductive material
Patent
1997-11-05
1999-11-02
Booth, Richard
Semiconductor device manufacturing: process
Coating with electrically or thermally conductive material
To form ohmic contact to semiconductive material
438637, 438670, H01L 214763
Patent
active
059769661
ABSTRACT:
An insulating film is formed by CVD on the surface of a semiconductor substrate formed with circuit elements such as transistors, and thereafter a hydrogen silsesquioxane resin film is formed on the insulating film by spin-coating or the like. This resin film is sequentially subjected to low temperature annealing at 400.degree. C. or lower and then to high temperature annealing at 700.degree. C. or higher. The low temperature annealing changes the resin film into a silicon oxide film, and the high temperature annealing is performed in order to make dense the film quality of the silicon oxide film. The high temperature annealing is performed by rapid thermal annealing in an oxidizing atmosphere of water vapor or the like. A CVD insulating film is formed on the densified silicon oxide film and planarized by CMP or the like, according to necessity. A contact hole is formed through the CVD insulating film, densified silicon oxide film and the insulating film, and a wiring layer is thereafter deposited.
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Booth Richard
Hack Jonathan
Yamaha Corporation
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