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:
Mar. 23, 1976
Filed:
Nov. 13, 1974
Applicant:
Inventors:
Hiroo Yonezu, Tokyo, JA;
Tonao Yuasa, Tokyo, JA;
Assignee:
Nippon Electric Company, Limited, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
331 / ; 29591 ; 331 / ; 357 18 ; 357 71 ; 357 81 ;
Abstract
An injection semiconductor laser having an active region normal to the reflecting surfaces includes an ohmic metal film on the side of the heat sink near the active region. The ohmic metal film is plated with a layer of a thermally conductive material. The shape and dimensions of the plated layer are selected to protect the laser from being damaged when the laser device is bonded to the heat sink, and also to prevent light rays emerging through one of the reflecting surfaces from impinging on the surface of the heat sink.