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. 04, 1993
Filed:
Jul. 05, 1991
Applicant:
Inventors:
Hidenori Kawanishi, Nara, JP;
Taiji Morimoto, Nara, JP;
Shinji Kaneiwa, Nara, JP;
Hiroshi Hayashi, Soraku, JP;
Nobuyuki Miyauchi, Yamatokoriyama, JP;
Seiki Yano, Kashihara, JP;
Mitsuhiro Matsumoto, Nara, JP;
Kazuaki Sasaki, Yao, JP;
Masaki Kondo, Nara, JP;
Takehiro Shiomoto, Nara, JP;
Saburo Yamamoto, Uda, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257 98 ; 372 49 ;
Abstract
A semiconductor laser device is disclosed which emits laser light from a facet. The semiconductor laser device comprises a multi-layered structure formed on a semiconductor substrate, the multi-layered structure having an AlGaAs active layer for laser oscillation, and a protective film formed on the facet, wherein a film containing sulfur is provided between the facet and the protective film.