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:
Jan. 30, 2007
Filed:
May. 14, 2002
Masaki Tatsumi, Nara, JP;
Toshio Hata, Nara, JP;
Mayuko Fudeta, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A nitride-based semiconductor light-emitting device includes a light-emitting element having an n-GaN substrate and a nitride-based semiconductor multilayer film formed on the n-GaN substrate. The n-GaN substrate of the light-emitting element is fixed to a mount surface. The n-GaN substrate has one surface with the nitride-based semiconductor multilayer film formed thereon and an opposite surface with a metal layer and an ohmic electrode formed thereon. The metal layer contains a first metal and a second metal and the ohmic electrode is formed of the second metal. The adhesion between the ohmic electrode and the n-GaN substrate is thus improved. Accordingly, the semiconductor light-emitting device which is highly reliable with respect to the thermal strain from the mount surface can be provided.