Process for producing a semiconductor wafer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6416393
APP PUB NO 20010036797A1
SERIAL NO

09824394

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A process is for producing a semiconductor wafer with a front surface and a back surface, in which the semiconductor wafer is subjected to two-sided polishing. The process includes the following: (a) producing a hydrophobic surface on the semiconductor wafer by treating the semiconductor wafer with an aqueous HF solution; (b) simultaneous polishing of the front surface and the back surface of the semiconductor wafer with a surface which has been rendered hydrophobic, with an alkaline polishing abrasive being continuously supplied between two rotating upper and lower polishing plates, which are both covered with a polishing cloth, the pH of the polishing abrasive being from pH 8.5 to pH 12.5; (c) after an intended polishing abrasion has been reached, supplying a stopping agent to the semiconductor wafer; and (d) removing the semiconductor wafer from the polishing plates. There is also a carrier for the double-side polishing of at least one semiconductor wafer, having a cutout for holding the semiconductor wafer which is lined with a shaped part made from plastic. The shaped part is constructed in such a manner that it divides a free space between an edge of the semiconductor wafer and the carrier into a plurality of separate empty spaces.

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Patent Owner(s)

Patent OwnerAddress
WACKER SILTRONIC GESELLSCHAFT FUR HALBLEITERMATERIALIEN AGJOHANNES-HESS-STRASSE 24 BURGHAUSEN 84489

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ehlert, Andreas Mehring, DE 3 12
Fabry, Laszlo Burghausen, DE 16 95
Lechner, Gabriele Marktl, DE 1 5
Schnegg, Anton Burghausen, DE 11 187

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