Semiconductor device manufacturing: process – Chemical etching
Reexamination Certificate
2005-04-21
2008-05-06
Lebentritt, Michael (Department: 2812)
Semiconductor device manufacturing: process
Chemical etching
C438S680000, C438S682000, C438S710000, C438S758000, C438S784000, C438S785000, C438S900000, C257SE21219
Reexamination Certificate
active
07368384
ABSTRACT:
A method of using a film formation apparatus for a semiconductor process includes a step of removing a by-product film deposited on an inner surface of a reaction chamber of the film formation apparatus. This step is performed while supplying a cleaning gas containing hydrogen fluoride into the reaction chamber, and forming a first atmosphere within the reaction chamber, which allows water to be present as a liquid film.
REFERENCES:
patent: 6095158 (2000-08-01), Shugrue
patent: 6164295 (2000-12-01), Ui et al.
patent: 3-293726 (1991-12-01), None
Choi Dong-Kyun
Endo Atsushi
Fujiwara Tomonori
Furuya Haruhiko
Harada Katsushige
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