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:
Jul. 12, 2007
Masato Saito, Machida, JP;
Masato Saito, Machida, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A photomask evaluation method includes applying energy waves to a photomask having a to-be-measured pattern, detecting a response wave from the photomask, acquiring an edge profile of the to-be-measured pattern based on the response wave, acquiring dimension of that portion of the to-be-measured pattern which lies in a preset area, based on the edge profile, subjecting that portion of the edge profile which lies in the preset area to frequency analysis to acquire intensity distribution of frequency components, and extracting a portion with a frequency lower than a preset frequency from the intensity distribution.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile