Patent ID: 8609304
Filing Date: 2013-12-17
Classification: G03F

Abstract:
1. A method of manufacturing a transfer mask having on a transparent substrate a thin film formed with a transfer pattern, wherein the transfer pattern includes two patterns which are respectively formed in a first region and a second region based on the same design mask pattern, and wherein the method comprises: a step of irradiating inspection light to the first region to obtain a first transmitted light quantity distribution; a step of irradiating the inspection light to the second region to obtain a second transmitted light quantity distribution; a step of producing a predetermined-range difference distribution by plotting coordinates at which a difference light quantity value calculated from a comparison between the first transmitted light quantity distribution and the second transmitted light quantity distribution is not less than a first threshold value and less than a second threshold value; and a step of selecting the transfer mask in which a region with high density of plotting is not detected in the predetermined-range difference distribution.