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:
May. 11, 1999
Filed:
May. 27, 1997
Leybold Systems GmbH, , DE;
Abstract
In an apparatus for the production of single crystals (103) by the Czochralski melt drawing method, a gripping device (125a, 125b) is provided, by means of which the crystal (103) is held during the growing process by a pressure which is exerted radially on its lateral surface and which exceeds the frictional resistance, as a result of which the weight of the growing crystal is completely supported. The gripping device (125a, 125b) has at least two holding devices (128a, 128b) arranged opposite each other, which, during the crystal growth phase, initially move parallel to the crystal and then, after a certain desired crystal diameter has been reached, are laid against the crystal by means of the holding devices (128a, 128b) in such a way that the growth the crystal in the area of the melting zone is not disturbed.