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. 09, 2001
Filed:
May. 20, 1998
Shin-Etsu Handotai Co., Ltd., Tokyo, JP;
Abstract
A method for manufacturing compound semiconductor epitaxial wafer allowing sharp changes in alloy composition and growth of high-quality epitaxial layers. In a process for epitaxially growing a gallium arsenide phosphide GaAs,P,alloy composition gradient layer,on a compound semiconductor single-crystalline substrate made of gallium phosphide GaP or gallium arsenide GaAs, one group V gas as a source for the group V element not composing the single-crystalline substrate is varied in its supply volume in at least one cycle of sharp increase/moderate decrease, while the other group V gas as a source for the group V element composing the single-crystalline substrate is moderately decreased, thereby achieving at least one cycle of sharp increase/moderate decrease of a product of partial pressures of the group III and group V gases so that at least one set of an increasing zone and a decreasing zone of the alloy composition is formed within the gallium arsenide phosphide GaAs,P,alloy composition gradient layer