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:
Jun. 16, 1992
Filed:
Mar. 13, 1991
James R Herring, San Marcus, CA (US);
James L Gates, Vista, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A radiation detector includes a silicon substrate (12) having opposing first and second major surfaces, the substrate absorbing visible radiation incident upon the first major surface and passing into the substrate for generating charge carriers therefrom. The detector further includes a silicide layer (16) overlying the second major surface of the substrate, the silicide layer forming a Schottky-barrier junction with the underlying substrate. The silicide layer absorbs IR radiation for generating charge carriers therefrom. The substrate has a resistivity of approximately one thousand ohms per centimeter or greater for enhancing responsivity to visible radiation. A cavity structure (16) overlies the silicide layer and has a reflector (18) optically coupled thereto for reflecting IR radiation that passes through the silicide layer back to the silicide layer. To further enhance responsivity the substrate is thinned and has a thickness within a range of approximately 25 microns to approximately 125 microns.