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:
Oct. 26, 1999
Filed:
Sep. 25, 1997
Shinji Saito, Yokohama, JP;
John Rennie, Bunkyo-ku, JP;
Masaaki Onomura, Kawasaki, JP;
Genichi Hatakoshi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A wedge-like etching groove is formed so that stresses can be collected along a cleavage surface of a nitride based compound semiconductor, and end portions are separated from a substrate. With these operations, a light-emitting layer can form an excellent mirror by a natural cleavage. Further, by separating a portion of the end surfaces from the substrate, it is possible to suppress a deformation from the substrate and therefore, a deterioration due to the deformation can be prevented. Therefore, it is possible to provide a nitride based compound semiconductor light-emitting device which can form an excellent cleavage surface with a simple process.