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. 09, 2010
Filed:
May. 27, 2005
Masaya Shimizu, Ehime, JP;
Shinichi Morishima, Ibaraki, JP;
Makoto Sasaki, Ibaraki, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A Group III-V compound semiconductor includes, at least, a substrate, a buffer layer of the general formula InGaAlN (wherein, 0≦u≦1, 0≦v≦1, 0≦w≦1, u+v+w=1) and a Group III-V compound semiconductor crystal layer of the general formula InGaAlN (wherein, 0≦x≦1, 0≦y≦1, 0≦z≦1, x+y+z=1), in this order, wherein the buffer layer has a thickness of at least about 5 Å and not more than about 90 Å. A method is provided for producing the Group III-V compound semiconductor, including forming a buffer layer of the general formula InGaAlN on a substrate to give a thickness of at least about 5 Å and not more than about 90 Å at temperatures lower than the growing temperature of the compound semiconductor crystal layer before growing the compound semiconductor crystal layer, and then growing a Group III-V compound semiconductor crystal layer of the general formula InGaAlN on the buffer layer.