Method of coating a transparent substrate

Details Method of coating a transparent substrate Method of coating a transparent substrate

1984-03-22

1985-02-05

Demers, Arthur P.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204192R, 428426, 428428, 428432, 428433, C23C 1500

Patent

active

044977000

ABSTRACT:
Optical filters, e.g. for reflecting infrared radiation while passing visible light radiation is made by applying to the silver reflective coating a protective coating of a metal oxide by magnetron cathode sputtering and only thereafter is the dereflective layer applied by magnetron cathode sputtering. The protective coating-oxygen partial pressure and coating rate are substantially less than the dereflective coating-oxygen partial pressure and coating rate. Apparently the protective coating prevents damage to the reflective coating.

REFERENCES:
patent: 4013532 (1977-03-01), Cormia et al.
patent: 4098956 (1978-07-01), Blickensderfer
patent: 4337990 (1982-07-01), Fan et al.
patent: 4450201 (1984-05-01), Brill et al.
patent: 4462883 (1984-07-01), Hart
patent: 4462884 (1984-07-01), Gillery et al.

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