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:
Nov. 04, 2003
Filed:
Jul. 31, 2002
Method for separating slices from a hard brittle workpiece, and wire saw for carrying out the method
Karl Egglhuber, Hebertsfelden, DE;
Jörg Lukschandel, Kempten, DE;
Wacker Siltronic Gesellschaft fur Halbleitermaterialien AG, Burghausen, DE;
Abstract
A method for separating slices from a hard brittle workpiece involves subjecting the workpiece to an advancing movement and pressing it onto wires of a wire web of a wire saw, the wires being under a defined wire tension and making contact with the workpiece over a cutting depth along a cutting contour. The wires are lifted off the cutting contour an number of times while the wire tension is kept substantially unchanged, with the aid of rolls of a roll system. The roll system comprises at least one roll that is moved onto the wire web and back, the roll system comprising at least two moveable rolls which flank the workpiece. A wire saw is suitable for carrying out the method.