Process for an improved laminate of ZnSe and ZnS

Details Process for an improved laminate of ZnSe and ZnS Process for an improved laminate of ZnSe and ZnS

1995-01-24

1997-11-11

Speer, Timothy

Stock material or miscellaneous articles

Composite

Of inorganic material

428699, 428704, 4289088, 359355, 359356, B32B 1800

Patent

active

056861958

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: 4697866 (1987-10-01), Howard
patent: 4721657 (1988-01-01), Takahashi
patent: 4907846 (1990-03-01), Tustison
patent: 4978577 (1990-12-01), Purohit
patent: 5067781 (1991-11-01), Montanari
patent: 5122424 (1992-06-01), Chaffin, III

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