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. 22, 2005
Filed:
Jun. 11, 2002
Applicants:
Masahiko Sakata, Kyoto, JP;
Atsuo Tsunoda, Kashiba, JP;
Inventors:
Masahiko Sakata, Kyoto, JP;
Atsuo Tsunoda, Kashiba, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S005/00 ;
U.S. Cl.
CPC ...
Abstract
The present invention relates to a ridge-stripe semiconductor laser device and a process for producing the same. More specifically, the object of the present invention is to control the formation of cavities at the side of the ridge without adding any step, and to provide a ridge stripe semiconductor laser device with good properties by strictly controlling its ridge width and a process for producing the same. Thereby, it is possible to form a ridge whose sidewalls stand almost vertically.