Patent ID: 7716628
Filing Date: 2010-05-11
Classification: G03F

Abstract:
1. A system for generating mask data, comprising: an extracting module configured to extract a block necessary to apply a correction for wide-range process proximity effects as a wide correction area from a plurality of blocks by comparing at least one parameter selected from the group consisting of a wafer pattern density, a mask pattern density, an optical density and mask pattern circumference lengths, which influences the wide-range process proximity effects, of each mask pattern in the blocks with an extraction condition, to design data being divided into the blocks on a chip area; a wide-correction data generator configured to generate wide correction data to make the correction applied to the wide correction area; a basic area setting module configured to set a basic reference area to include a plurality of patterns which optically influence each other, the sizes of the blocks being larger than the size of the basic reference area and the size of the basic reference area being narrower than an influence range of the wide-range process proximity effects; a basic correction data generator configured to generate basic correction data by making the correction with reference to basic mask pattern correction data calculated in consideration of process proximity effects in the basic reference area; a wide area setting module configured to set a size of a wide reference area in the chip area based on a range in which the wide-range process proximity effects extend; and a mask data generator configured to generate mask data by applying the wide correction data to the wide correction area and the basic correction data to the plurality of blocks other than the wide correction area, wherein the wide-correction data generator generates the wide correction data with reference to a wide mask pattern correction data in consideration of the wide-range process proximity effects in the wide reference area, wherein the basic reference area is set such that a distance from a center of the basic reference area to an outer circumference of the basic reference area is equal to or longer than a minimum distance where the process proximity effects in the basic reference area do not reach, and wherein the mask data generator replaces the basic correction data of an area that overlaps the wide correction area where the wide correction data is generated, with the wide correction data.