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:
Jul. 07, 1981
Filed:
Jul. 16, 1979
Applicant:
Inventor:
Paul P Webb, Beaconsfield, CA;
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357 13 ; 357 55 ; 357 58 ;
Abstract
The light entry surface or back surface of an avalanche or p-i-n photodiode is contoured in a regular array of indentations which are hemispherical or almost hemispherical in shape. Light incident on the photodiode undergoes multiple interactions with the contoured surface, thus reducing the entry surface reflectivity and increasing the optical path length in the photodiode, and thereby enhancing its long wavelength response.