Patent ID: 6660439
Filing Date: 2003-12-09
Classification: G03F,Y10S

Abstract:
A method of adding optical proximity correction to patterns, comprising:providing a mask pattern having a number of first regions and a number of second regions; providing digital pattern data for said mask pattern; forming a first optical proximity correction pattern wherein said first optical proximity correction pattern adds pattern width at said first regions of said mask pattern; forming a second optical proximity correction pattern wherein said second optical proximity correction pattern reduces pattern width at said second regions of said mask pattern; forming digital first OPC data for said first optical proximity correction pattern; forming digital second OPC data for said second optical proximity correction pattern; forming digital composite data wherein said digital composite data is said digital pattern data OR said digital first OPC data, and wherein OR represents the logical OR operation; and forming digital final data wherein said digital final data is formed by the logical subtraction of said digital second OPC data from said digital composite data, and said digital final data represents said mask pattern with optical proximity correction.