Patent ID: 7074524
Filing Date: 2006-07-11
Classification: G03F,G06T

Abstract:
1. A photomask formed with main patterns to be transferred to photosensitive material, comprising a pattern-dense region including said main patterns, and a pattern-interspersed region including one or more sub-patterns and not including said main patterns, wherein said sub-patterns are formed inside a rectangular region including all of said main patterns therein, wherein said sub-patterns are arranged in a manner that a part of at least one pattern selected from a group composed of said main patterns and said sub-patterns is included in a prescribed scan target range of a mask pattern defect inspecting apparatus used for inspecting patterns on said photomask at least in said rectangular region, wherein said scan target range is a range regulated by said mask pattern defect inspecting apparatus, in which data can be processed at one time in said mask pattern defect inspecting apparatus, wherein every scan target range in said rectangular region includes at least one of said main-patterns and said sub-patterns, wherever said scan target range is in said rectangular region, wherein said sub-patterns are arranged in said pattern-dense region at an interval narrower than a scanning width of said mask pattern defect inspecting apparatus in a direction perpendicular to said scanning direction and narrower than a length of said scan target range in said scanning direction.