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:
Oct. 06, 1998
Filed:
Mar. 27, 1996
Joel Askinazi, Trumbull, CT (US);
Tom Feng, Hopewell Junction, NY (US);
Raytheon Company, Lexington, MA (US);
Abstract
An electrically conductive infrared (IR) window (10) has high transmittance at IR wavelengths and includes an electrically conductive protective layer (14) which is direct bonded to a substrate (16) at room temperature without adhesive therebetween. The protective layer (14) and substrate (16) are transparent at IR wavelengths. The protective layer (14) and the substrate (16) are annealed at a bonding temperature above room temperature to enhance the bond strength. The protective layer (14) preferably comprises at least one of doped silicon and doped gallium arsenide and has a conductivity between 1 and 500 ohms/square. The substrate (16) preferably comprises at least one of zinc sulfide, zinc selenide, germanium, and gallium arsenide. The protective layer (14) and substrate (16) should be made of different materials with different coefficients of thermal expansion to allow debonding by heating above the bonding temperature.