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:
Apr. 04, 1978
Filed:
Feb. 08, 1977
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 13 ; 357 30 ; 357 89 ; 357 90 ;
Abstract
An avalanche photodiode has a rectification barrier formed by an n.sup.+ -layer and a p-type layer of a low doping concentration. A thin p-layer having a higher doping concentration than a p.sup.- -layer is inserted between the p.sup.- -layer and a .pi.-layer, whereby the avalanche breakdown voltage of the photodiode is lowered considerably.