Patent ID: 7386829
Filing Date: 2008-06-10
Classification: G03F

Abstract:
1. A method of fabricating a photomask, comprising steps of: (a) selectively carrying out a same sizing of a common feature distributed throughout an original main pattern in occupied parts and a remaining part, said sizing being consistent with a predetermined design rule, and said remaining part being void of said common feature and having a two dimensional area that is greater in each dimension than a system resolution; (b) selectively carrying out another sizing with the common feature being increased by a predetermined amount, and representing any overlapping areas as a single predetermined amount; (c) subtracting a result of step (b) and step (a) and adding the original main pattern to a subtraction result; (d) selectively identifying the remaining part as including the common feature so as to remove the remaining part; and (e) subtracting a resulting pattern formed in step (d) from a result of step (c) to form a resulting photomask, wherein said resulting photomask having a resulting remaining part that is two dimensional and a shortest dimension thereof being less than a system resolution.