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:
Sep. 05, 2000
Filed:
Sep. 10, 1997
William Leavitt, Haverhill, MA (US);
David Holbrook, Lexington, MA (US);
Varian Semiconductor Equipment Associates, Inc., Gloucester, MA (US);
Abstract
A system for correcting eccentricity and rotational error of a substantially circular workpiece, in which the workpiece is moved to a workstation, using a translating device. The rotational position and position of the workpiece center is determined. There is a rotatable member at the workstation, having a home position and a center. The rotatable member is pre-rotated from its home position an amount sufficient to correct workpiece rotational error. The translating device is caused to place the workpiece on the rotatable member such that the workpiece center is at a known position relative to the center of the rotatable member, to correct eccentricity. The rotatable member is then rotated back to its home position, to correct rotational error.