Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1984-07-30
1986-07-01
Smith, John D.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 86, 134 2218, 134 37, B08B 900
Patent
active
045979898
ABSTRACT:
Silicon films in integrated circuits are mass produced with reduced structural defects by passing a reactant gas which contains silicon over a batch of wafers in a quartz chamber to deposit a silicon substance on both the wafers in a quartz chamber and the quartz walls of the chamber; repeating the passing step on other batches of wafers until the thickness of the silicon substance on the quartz walls exceeds a predetermined limit; directing a forceful stream of gas against the quartz walls to knock microscopic particles of the silicon substance therefrom; removing the knocked-off microscopic particles from the chamber; and continuing the passing and repeating steps with no intervening acid etch of the silicon substance on the quartz walls.
REFERENCES:
patent: 4138306 (1979-02-01), Niwa
patent: 4500492 (1985-02-01), Yamakawa
Canfield Glenn R.
Wonsowicz Casimir J.
Burroughs Corporation
Fassbender Charles J.
Jaconetty K. E.
Peterson Kevin R.
Smith John D.
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