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:
Jun. 30, 1998
Filed:
Apr. 25, 1996
Karl Egglhuber, Hebertsfelden, DE;
Wacker Siltronic Gesellschaft fur Halbleitermaterialien AG, Burghausen, DE;
Abstract
A wire saw for, and a method of, cutting off slices from a workpiece. The re saw has a cutting head, which contains a plurality of wire guide rollers and around which a multiplicity of wire sections lying parallel to one another and forming plane wire webs are moved, a holding arm which carries the workpiece, and a feed, by means of which the wire sections of one of the wire frames cut through the workpiece while an auxiliary sawing medium is supplied. In one embodiment of the wire saw, the feed guide is arranged at the side of the cutting head and the holding arm can be swivelled parallel to the wire web. In another embodiment, holding arm is swivellable parallel to the wire web and the feed has a feed guide which guides the cutting head with the wire web toward the workpiece. For the purpose of a change of workpiece, the workpiece is transported by a holding arm carrying it from a sawing position above a wire web into a deposit position, the workpiece is released from the holding arm in the deposit position, a new workpiece is picked up from a pick-up position by the holding arm, and the new workpiece is transported by the holding arm into a sawing position above a wire web. The cutting head and a second cutting head may be used alternately for cutting off slices, in which the cutting head not in use is being prepared for future use while the other cutting head is currently in use.