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:
Apr. 17, 1990
Filed:
Aug. 10, 1988
Applicant:
Inventors:
Arthur E Geissberger, Roanoke, VA (US);
Robert A Sadler, Roanoke, VA (US);
Gregory E Menk, Roanoke, VA (US);
Matthew L Balzan, Roanoke, VA (US);
Assignee:
ITT Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357-4 ; 357 16 ; 357 60 ;
Abstract
A composite buffer layer is formed with a layer of GaAs on a semi-insulating GaAs substrate. Next a short period superlattice is formed followed by another GaAs layer. A layer of GaAlAs is then provided such that the Ai content and no doping followed by an intrinsic GaAs layer. The intrinsic GaAs layer is the active layer which serves as a channel.