Patent ID: 7480404
Filing Date: 2009-01-20
Classification: G03F,G06K,G06T,H01L

Abstract:
1. A method of positioning an article, from a group of similar articles, with respect to a processing tool to be applied to the article while located on a stage, the method comprising: (a) locating a first one of said articles on the stage at a predetermined registration of the first article with the stage corresponding to a certain angular orientation of the first article relative to the processing tool; determining a transformation between a coordinate system of the article under processing and a coordinate system of the processing tool; acquiring an image of at least a part of the first article to determine, by image processing, the relative position of at least one site of interest on the first article with respect to the processing tool, thereby enabling to bring said at least one site of interest to the processing position by moving at least a part of said processing tool with respect to the stage; (b) storing data indicative of the relative position of said at least one site of interest of the first article; (c) for another one of said articles to be processed, providing said predetermined registration with the stage, and utilizing the data obtained about the first article to directly bring the site of interest on said another article to the processing location.