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:
Feb. 23, 1993
Filed:
Jul. 08, 1991
Applicant:
Inventors:
Morio Wada, Tokyo, JP;
Masahito Seko, Yamato, JP;
Youichi Sekiguchi, Tokyo, JP;
Hideto Iwaoka, Hachioji, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257 21 ; 257187 ; 257438 ; 257185 ;
Abstract
A photodiode having a GaInAs light-absorbing layer on an InP substrate which can reduce temperature dependence of the spectral responsivity as well as enable the optical power measurement with less dependence on the incident light spectral width by using a material with smaller composition ratio of Ga for the light-absorbing layer to extend the absorption edge toward the longer wavelengths.