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. 04, 2014
Filed:
Aug. 06, 2012
Shimpei Takagi, Osaka, JP;
Shimpei Takagi, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Abstract
A method for fabricating a group-III nitride semiconductor laser device having a semi-polar surface provides a laser cavity mirror which can reduce lasing threshold current. A support plate H tilts at an angle THETA from an m-axis toward a reference plane Ab defined by a direction PR of travel of the bladeand an a-axis in a c-m plane while the direction PR is being orthogonal to the front surface Ha of the support plate H. The bladeis positioned so as to be aligned to a plane which includes an intersection Pbetween the endmost scribe markamong a plurality of scribe marksand the front surfaceof the substrate productand extends along the direction PR. In the case where the angle ALPHA defined ranges either from 71 to 79 degrees or from 101 to 109 degrees, the angle THETA then ranges from 11 to 19 degrees, and thereby the reference plane Ab along the direction PR extends along the c-plane orthogonal to the c-axis.