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. 19, 2002
Filed:
May. 15, 2000
Hideki Watanabe, Sanda, JP;
Hiroshi Morita, Amagasaki, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
The present invention was achieved in order to provide a method for pulling a single crystal, wherein a single crystal hanging portion makes it possible to pull even a heavy single crystal safely, a new cost related to a seed crystal is not caused by the use of a general and usual seed crystal, the time required for the process can be shortened by making the single crystal hanging portion dislocation-free at a high speed, and even a seed crystal containing a few dislocations can be made dislocation-free, so that a seed crystal to which a few dislocations were induced can be reused without replacement, and an apparatus for pulling a single crystal. The method for pulling a single crystal wherein a single crystal is grown by pulling a seed crystal after dipping the seed crystal into a melt within a crucible, comprises bringing the seed crystal into contact with the melt, further dipping the seed crystal into the melt while the vicinity of the interface between the seed crystal and the melt is heated using an auxiliary heating means, stopping the heating with the auxiliary heating means, and pulling a single crystal without forming a neck.