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:
Jun. 23, 2009
Filed:
Jan. 19, 2005
Applicant:
Li-ming Wang, Taoyuan, TW;
Inventor:
Li-Ming Wang, Taoyuan, TW;
Assignee:
Winbond Electronics Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Systems for determining width/space limits for product mask layouts. A mask writer generates a first pattern on a test mask corresponding to a test mask layout. A lithography tool generates a second pattern on a wafer corresponding to a first pattern on a test mask by a lithography process using a preset exposure dose. A metrology tool measures widths of the first and second pattern. A controller determines a width/space limit for the product mask layout according to the width difference between the first and second pattern.