Patent ID: 7165235
Filing Date: 2007-01-16
Classification: G03F

Abstract:
1. A method of forming an exposure pattern by correcting pattern portions constituting a design pattern by a correction amount, said correction amount previously prepared so as to correspond to both a line width of said pattern portions and a space width of space portions adjacent to said pattern portions, comprising the steps of: subjecting said design pattern to a graphic form arithmetic operation to extract each of said pattern portions for each of target line widths and to extract each of said space portions for each of target space widths; subjecting each of said pattern portions extracted for each of said target line widths and said space portions extracted for each of said target space widths to graphic form arithmetic operation, based on the corresponding one of correction amounts, to thereby correct said pattern portions having each of said target line widths for each of said target space widths; subjecting an edge of said design pattern to enlargement correction by an amount equivalent to ½ of each of said target space widths and then subjecting said edge to reduction correction by the same amount to obtain a correction pattern; and subtracting said design pattern from said correcting pattern to extract a graphic form as a space portion having a space width being equal to or less than said target space width; wherein extraction of said pattern portions is performed in an order from target line widths of larger values to target line widths of smaller values.