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:
Feb. 15, 2005
Filed:
Oct. 22, 2002
Hironobu Sai, Kyoto, JP;
Jun Ichihara, Kyoto, JP;
Hironobu Sai, Kyoto, JP;
Jun Ichihara, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A lower multilayer reflection film (), a light emitting layer forming portion () and an upper multilayer reflection film () are sequentially formed on a substrate () to form a semiconductor laminated portion (), and a current injection region A is formed at a part of the semiconductor laminated portion so as to emit light from the surface in the center thereof. And, according to the present invention, the current injection region A is formed so as to be deflected from a center of the substrate. As a result, there is provided a surface light emitting type semiconductor laser capable of monitoring a light emitting power correctly and controlling it automatically in order to achieve the constant light emitting power in a case where the surface light emitting type laser chip is used as a light source for a pickup or the like.