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:
Apr. 22, 2003
Filed:
Dec. 22, 2000
Gert-Jan Snijders, Amersfoort, NL;
Vladimir Ivanovich Kuznetsov, Delft, NL;
Christianus Gerardus M. de Ridder, Hoogland, NL;
Herbert Terhorst, Amersfoort, NL;
ASM International N.V., Bilthoven, NL;
Abstract
An apparatus for treating a wafer manufactured from semiconducting material, the apparatus comprising a first and a second housing part arranged for movement away front and towards each other, the two housing parts bounding a treatment chamber, while around the treatment chamber there is provided a first groove connected to gas discharge means, while in at least one of the two boundary surfaces there is provided a second groove connected to gas feed means, the first groove being located radially within the second groove, and, in use, the pressure created by the gas feed means being such that from the second groove, gas flows both in radial inward and in radial outward direction in the gap between the first and the second boundary surface.