Patent ID: 6706452
Filing Date: 2004-03-16
Classification: G03F,Y10S

Abstract:
A method of manufacturing a photomask, comprising:(a) a step of preparing one or more first photomasks; (b) a step of preparing one mask substrate of a second photomask; (c) a step of depositing a photosensitive organic film on said one mask substrate of the second photomask; (d) a first exposure step in which the reduced projection exposure using each of said one or more first photomasks is performed to said photosensitive organic film on said one mask substrate of the second photomask, thereby transferring a first pattern onto each of a plurality of first regions arranged in integrated circuit pattern regions of said photosensitive organic film on said second photomask; (e) a second exposure step in which an energy beam is selectively irradiated onto each of second regions arranged around said plurality of first regions on said photosensitive organic film, thereby transferring a second pattern onto said photosensitive organic film; and (f) a step of performing the development to said photosensitive organic firm, thereby forming said first and second patterns made of said photosensitive organic films on said second photomask.