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:
Jan. 19, 2021
Filed:
Apr. 18, 2017
Applicant:
Sumco Corporation, Tokyo, JP;
Inventors:
Yasuhito Narushima, Tokyo, JP;
Toshimichi Kubota, Tokyo, JP;
Assignee:
SUMCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 15/10 (2006.01); C30B 15/22 (2006.01); C30B 29/06 (2006.01); C30B 15/20 (2006.01); C30B 15/14 (2006.01);
U.S. Cl.
CPC ...
C30B 15/22 (2013.01); C30B 15/14 (2013.01); C30B 15/20 (2013.01); C30B 29/06 (2013.01);
Abstract
A production method of a monocrystalline silicon includes: forming a shoulder of the monocrystalline silicon; and forming a straight body of the monocrystalline silicon. To form the shoulder, a crucible is heated such that a heating ratio, which is calculated by dividing a volume of heat from a lower heater by a volume of heat from an upper heater, increases from a predetermined value of 1 or more.