The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1994
Filed:
Oct. 27, 1992
Applicant:
Inventors:
Frank C Sulzbach, Dallas, TX (US);
Valeria J Epling, Richardson, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
359359 ; 359582 ; 427164 ;
Abstract
Durable thorium fluoride, low reflectance, high transmittance coatings for germanium (zinc sulfide, zinc selenide, gallium arsenide) exterior window surfaces are replaced using magnesium fluoride, a material previously not considered applicable to the 8 to 12 .mu.m wavelength range. This is enabled by the use of argon ion bombardment of the growing film. This method reduces the intrinsic stress of deposited films and permits growth of magnesium fluoride films of sufficient thickness to be used on the exterior surface of IR windows.