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:
Sep. 12, 2000
Filed:
Apr. 06, 1999
Toshirou Kotooka, Hiratsuka, JP;
Yoshiyuki Shimanuki, Hiratsuka, JP;
Makoto Kamogawa, Hiratsuka, JP;
Komatsu Electronic Metals Co., Ltd., Kanagawa, JP;
Abstract
This invention provides a device for manufacturing single crystals provided with an after-cooler that causes an abrupt temperature gradient along the axis of the crystal being lifted. The device according to this invention can further increase the lifting speed of single crystals. The after-cooler (4) is disposed between the single crystal (5) being lifted and the heat-shield plate (1). Both the inner surface facing the single crystal (5) and the outer surface facing the heat-shield plate (1) of the after-cooler have a surface emissivity value larger than 0.6. Furthermore, the after-cooler (4) is made of cooling pipes or cooling jackets, and the surfaces of the after-cooler (4) are treated by oxidizing or nitriding so as to increase their emissivity values.