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:
Mar. 23, 2004
Filed:
Aug. 23, 2002
Tomonobu Noda, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An aspect of the present invention provides a system for evaluating mask patterns, including a pattern image generator configured to generate a pattern image of mask patterns to be formed on a mask, a defect generator configured to receive defect data for particles and imaginarily generate defects on the mask according to the defect data, a pattern-defect image generator configured to generate a pattern-defect image of the mask by combining the generated pattern image with the generated defects, a pattern tester configured to determine whether or not each of the defects in the pattern-defect image is allowable according to pattern rules, and a ratio computation unit configured to compute at least one of an allowable ratio and an un allowable ratio according to a determination result from the pattern tester.