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. 25, 1992
Filed:
Dec. 03, 1991
Dominique Valentian, Rosny S/Seine, FR;
Societe Europeenne de Propulsion, Surenesnes, FR;
Abstract
The apparatus comprises a thermally insulating enclosure, first, second, and third diffusers for constituting first, second, and third isothermal heating zones respectively around first, second, and third compartments of a removable closed crucible designed to contain a source material in the first compartment and a substrate in the second compartment. The first, second, and third diffusers are thermally independent from one another by construction, each of them having a U-shaped section to surround the first, second, and third compartments of the crucible respectively. The first, second, and third compartments are disposed in non-aligned manner along an angled line such that the angles between the first, second, and third compartments provide thermal decoupling of radiant energy between the compartments.