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. 07, 2004
Filed:
Nov. 29, 2001
Jiro Inoue, Kumagaya, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A plurality of fiducial mark plates, on which a plurality of fiducial marks are dispersedly arranged by each measurement sequence which uses the fiducial mark, are arranged on the periphery of a substrate holder on the substrate stage so as to make the positional relationship between the substrate holder constant. This allows the fiducial mark plates to be arranged on the substrate stage at a place where there is little space. In addition, the main controller performs various measurement sequences that include the detection operation to detect the positional information on each fiducial mark using the mark detection system. Accordingly, it becomes possible to downsize the substrate stage, which leads to a reduction in footprint, while maintaining the measurement functions.