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. 26, 2002
Filed:
Mar. 15, 2000
Robert K. Leidy, Burlington, VT (US);
Debra L. Meunier, Westford, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A mask overlay measurement target includes nested boxes on three levels or has adjacent boxes sharing a common side, saving substantial area. The nested overlay measurement target also provides savings in measurement time since multiple overlay combinations can be measured at once. The nested target provides more level-to-level overlay information than has been available with standard box-in-box targets. The nested boxes are also used on a single level to provide area savings for stepper field placement metrology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile