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:
Feb. 05, 1985
Filed:
Apr. 22, 1982
Applicant:
Inventor:
Masakatu Kojima, Yokosuka, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C30B / ;
U.S. Cl.
CPC ...
422249 ; 156607 ;
Abstract
An apparatus for producing monocrystalline silicon uniformly containing oxygen at a high concentration. The invention provides an apparatus that employs an improvement in the Czochralski method for producing monocrystalline silicon. The apparatus includes an annular shaped member which floats on the surface of the silicon melt and prevents the escape of oxygen from the silicon melt. The member rotates around a pull of monocrystalline silicon which is pulled through the aperture of the member. The member preferably is made of quartz which supplies oxygen to the silicon melt and thereby increases the concentration of oxygen in the melt.