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. 11, 2013
Filed:
Oct. 17, 2011
Erich Daub, Emmerting, DE;
Raimund Kaiss, Neuoetting, DE;
Michael Kloesler, Burghausen, DE;
Thomas Loch, Burghausen, DE;
Erich Daub, Emmerting, DE;
Raimund Kaiss, Neuoetting, DE;
Michael Kloesler, Burghausen, DE;
Thomas Loch, Burghausen, DE;
Siltronic AG, Munich, DE;
Abstract
A support ring for supporting a monocrystalline silicon semiconductor wafer during a thermal treatment of the semiconductor wafer has outer and inner lateral surfaces and a curved surface extending from the outer lateral surface to the inner lateral surface, this curved surface serving for the placement of the semiconductor wafer. The curved surface has a radius of curvature of not less than 6000 mm and not more than 9000 mm for 300 mm diameter wafers, or a radius of curvature of not less than 9000 mm and not more than 14,000 mm for 450 mm diameter wafers. Use of the support ring during thermal treatment reduces slip and improves wafer nanotopography.