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:
Oct. 06, 1998
Filed:
Apr. 10, 1997
Ronald D Bartram, Webster Groves, MO (US);
Eugene R Hollander, Wentzville, MO (US);
MEMC Electronic Materials, Inc., St. Peters, MO (US);
Abstract
Apparatus for cleaning semiconductor wafers comprises a tank for containing a liquid wherein the liquid has an upper surface. A wafer holder holds the semiconductor wafer in the tank with at least a portion of the semiconductor wafer being immersed in the liquid within the tank. A wafer-moving mechanism is constructed for engaging the semiconductor wafer in the tank to rotate the semiconductor wafer and to reciprocate the semiconductor wafer so that at least a central region of the wafer repeatedly passes through the surface of the liquid. The wafer-moving mechanism comprises first and second surfaces engageable with the semiconductor wafer and rotatable about respective first and second axes of rotation for rotating the wafer.