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. 17, 1979
Filed:
Mar. 24, 1977
Applicant:
Inventors:
Yutaka Takeda, Ohme, JP;
Satoshi Nakamura, Hachioji, JP;
Naoki Chinone, Kokubunji, JP;
Hisao Nakashima, Tokorozawa, JP;
Kazuhiro Kurata, Hachioji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
331 / ; 331 / ; 357 18 ; 357 56 ; 357 81 ;
Abstract
A semiconductor layer for supporting a diode chip of a semiconductor laser is formed to be higher than a semiconductor layer containing a current-conducting region, whereby stresses acting on the diode chip by mounting the diode chip are relieved to prevent degradation of performance and reduced life of the semiconductor laser.