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:
Jun. 11, 2002
Filed:
Sep. 16, 1999
Hironobu Narui, Kanagawa, JP;
Takehiro Taniguchi, Tokyo, JP;
Noriko Ueno, Kanagawa, JP;
Nobukata Okano, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A stripe portion extending in an <011> crystal axis direction of a compound semiconductor substrate ( ) in which a {100} crystalline surface is made a major surface is formed between stepped portions ( ), a laser resonator is formed in the stripe portion, the width of the stripe portion at one end surface of the laser resonator is made broader in width compared with the central portion and another end surface of the laser resonator. Then, in accordance with the shape of the stripe portion, the stripe shape of an active layer of the laser resonator is made broader in width than the center portion and the other end surface, whereby a semiconductor laser of a narrow field pattern with a low threshold value is obtained.