Coatings
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United States of America Patent
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-
Dec 28, 1999
Grant Date -
N/A
app pub date -
Feb 11, 1997
filing date -
Feb 13, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A scratch resistant coating for the window of an infra red sensor comprises a layer of zirconium oxynitride or hafnium oxynitride. The formula of the coating is M.sub.1-(y+z) O.sub.y N.sub.z where y and z are both in the range 0.1 to 0.4. The coating and the window are both transmissive in the infra red and visible ranges of the spectrum.
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