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:
Nov. 03, 1987
Filed:
Apr. 01, 1986
Applicant:
Inventors:
Louis Hemmerdinger, Old Bethpage, NY (US);
Herbert Schneider, Plainview, NY (US);
Assignee:
Grumman Aerospace Corporation, Bethpage, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01B / ;
U.S. Cl.
CPC ...
422254 ; 156606 ; 156607 ; 156608 ; 156611 ; 156612 ; 156D / ; 156D / ; 156D / ;
Abstract
An ampoule assembly for the growth of single crystal materials is particularly adapted for a micro-gravity environment and includes a plurality of centering rods for spacing a crystalline material from the inner surface of an ampoule. The centering rods are spaced relative to one another to form a dopant vapor passageway to provide uniform stoichiometry of the crystal upon melting and resolidification. Minimum contact between ampoule and the crystalline material ensures greater purity of the crystalline material when the material is transformed into a single crystal.