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:
Aug. 26, 2025
Filed:
Sep. 08, 2023
Applicant:
Axt, Inc., Fremont, CA (US);
Inventors:
Assignee:
AXT, INC., Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 11/00 (2006.01); C30B 29/42 (2006.01); H01L 21/02 (2006.01);
U.S. Cl.
CPC ...
C30B 29/42 (2013.01); C30B 11/002 (2013.01); C30B 11/003 (2013.01); C30B 11/006 (2013.01); H01L 21/02395 (2013.01);
Abstract
Methods and wafers for vertical gradient freeze 8 inch gallium arsenide (GaAs) substrates. In disclosed examples, vertical gradient freeze systems for forming gallium arsenide (GaAs) substrates having silicon as a dopant, the system includes a crucible to contain a GaAs liquid melt and seed material during a formation process; one or more heating coils arranged in a plurality of heating zones; and a pedestal to move relative to the crucible, the system operable to control heating of the plurality of heating zones and movement of the pedestal to form a single crystal GaAs substrate.