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:
May. 25, 2010
Filed:
Feb. 14, 2008
Applicant:
Keiji Yamashita, Utsunomiya, JP;
Inventor:
Keiji Yamashita, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 27/42 (2006.01); G03B 27/52 (2006.01);
U.S. Cl.
CPC ...
Abstract
An immersion exposure apparatus includes a projection optical system, a first supply unit, and a second supply unit. The projection optical system projects exposure light from an original onto a substrate. The first supply unit forms a first liquid film in a space formed between the projection optical system and the substrate by supplying first liquid. The space includes a light path of the exposure light. The second supply unit forms a second liquid film around the first liquid film by supplying second liquid that is different from the first liquid.