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:
Feb. 19, 2019
Filed:
Jun. 06, 2018
Gigaphoton Inc., Tochigi, JP;
Hirokazu Hosoda, Oyama, JP;
Gigaphoton Inc., Tochigi, JP;
Abstract
An extreme ultraviolet light generating apparatus may include: a chamber, within which extreme ultraviolet light is generated from a droplet which is supplied to a predetermined region therein; an image forming optical system that forms an image of the droplet supplied to the predetermined region; an imaging element that captures an image of the formed image; a stage that moves the image forming optical system and/or the imaging element in an optical axis direction of the image forming optical system; a light energy measuring unit that measures light energy which is generated when the extreme ultraviolet light is generated; and a control unit that controls the stage based on a measured value of the light energy measured by the light energy measuring unit such that an image formation plane of the image of the droplet formed by the image forming optical system matches an imaging surface of the imaging element.