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. 16, 1983
Filed:
Jul. 28, 1981
Applicant:
Inventors:
Jacques Amouroux, Paris, FR;
Daniel Morvan, Paris, FR;
Assignee:
Electricite de France (Service National), Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423348 ; 204164 ; 156D / ;
Abstract
Boron is removed from silicon by zone melting purification. A jet of hot plasma obtained by high frequency excitation is directed on a zone of a bar of silicon to be purified. The plasma is formed from a mixture of a plasma-producing gas, such as argon, and an amount of oxygen which is sufficiently low to avoid oxidization of silicon.