Coating apparatus – Gas or vapor deposition – Work support
Patent
1995-02-24
1995-12-19
Bueker, Richard
Coating apparatus
Gas or vapor deposition
Work support
118500, C23C 1600
Patent
active
054765498
ABSTRACT:
The surface of a zinc selenide substrate is ground to curve in the opposite direction from that which occurs due to the bimetallic effect when zinc sulfide is deposited on a flat substrate by the chemical vapor deposition process. The bowing of the interface that occurs upon cooling of the hot laminate when the surface of the substrate is flat before deposition is compensated for by the pre-figured bowing. A distortion free window for the transmission of infra-red radiation is provided by this invention.
REFERENCES:
patent: 4834022 (1989-05-01), Mahawili
patent: 4978577 (1990-12-01), Purohit
patent: 5090900 (1992-02-01), Rudolf
patent: 5376180 (1994-12-01), Mahler
patent: 5383971 (1995-01-01), Selbrede
Burns Lee E.
MacDonald James C.
Taylor Raymond L.
Bueker Richard
CVD Inc.
Didrick Robert M.
White Gerald K.
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