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:
Jan. 13, 2009
Filed:
Sep. 15, 2004
Antonius Johannes Van Der Net, Tilburg, NL;
Paul Van Der Veen, Waalre, NL;
Yuri Johannes Gabriel Van DE Vijver, Best, NL;
Antonius Johannes Van Der Net, Tilburg, NL;
Paul Van Der Veen, Waalre, NL;
Yuri Johannes Gabriel Van De Vijver, Best, NL;
ASML Netherlands B.V., Veldhoven, NL;
Abstract
A lithographic apparatus includes an illumination system for providing beam of radiation, and a support structure for supporting a patterning device. The patterning device imparts the beam of radiation with a pattern. The apparatus also includes a substrate table for holding a substrate, a projection system for projecting the patterned beam onto a target portion of the substrate, and a gas supply system for supplying a purge gas including oxygen to a plurality of spaces in the apparatus. The gas supply system is arranged so that the purge gas supplied to each of the plurality of spaces is a premixed purge gas mixture composed by the gas supply system for each of the plurality of spaces on the basis of a predetermined relationship that relates a desired amount of oxygen in the premixed purge gas mixture to the respective space to which that premixed purge gas mixture is supplied.