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:
May. 10, 1983
Filed:
Sep. 02, 1980
Applicant:
Inventors:
Hirokazu Shimizu, Toyonaka, JP;
Masaru Wada, Takatsuki, JP;
Takashi Sugino, Takatsuki, JP;
Kunio Itoh, Uji, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 357 17 ; 357 61 ;
Abstract
In a laser comprising a GaAs substrate, an active layer of GaAlAs put between a first and a second clad layers, a buffer layer is disposed between said first clad layer and said substrate, and thermal expansion coefficient of the buffer layer is selected smaller than that of said active layer; thereby an internal stress of the active layer is released and lifetime of the laser is very much prolonged.
Shimizu, Hirokazu. (1983). Semiconductor laser (U.S. Patent No. 4383319). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4383319
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile