Coating apparatus – Gas or vapor deposition
Patent
1995-06-02
1997-01-07
Kunemund, Robert
Coating apparatus
Gas or vapor deposition
118724, C23C 1600
Patent
active
055912672
ABSTRACT:
A reduced pressure device the reduced pressure chamber of which is constructed of stainless steel, and includes a passivation film formed on the exposed interior surface thereof. The film has a thickness of more than 50 .ANG. and is composed of two or more layers. One layer contains mainly chrome oxide formed in the vicinity of the interface of the stainless steel and the passivation film. The other layer contains mainly iron oxide formed in the vicinity of the surface of the passivation film. A passivation film may also be used with a thickness of more than 50 .ANG. and containing mainly a mixture of chrome oxide and iron oxide. Lastly a passivation film may also be used with thickness of more than 50 .ANG. and containing mainly chrome oxide.
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Ohmi Tadahiro
Umeda Masaru
Kunemund Robert
Lund Jeffrie R.
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