Patent ID: 6988260
Filing Date: 2006-01-17
Classification: G03F

Abstract:
1. A method for optimizing fragmentation of integrated circuit boundaries for optical proximity correction (OPC) purposes, comprising steps of: (a) providing a segment of an integrated circuit boundary and a neighborhood of said integrated circuit boundary, said segment having a first end B and a second end E; (b) placing elements (B,0) and (E,0) into a set Ms, an element in said set Ms having a first component representing a point on said segment and a second component representing a numeric value; (c) when a length of said segment is not less than (D (d) projecting at least one vertex, other than said B and said E, of said integrated circuit boundary and said neighborhood to said segment to form at least one projection point P with a corresponding distance D between said at least one vertex and said segment; (e) when said P lies on said segment, adding an element (P,D) to said set Ms; (f) when an element (P′,D′) of said set Ms is such that a distance between said point P′ and said point B or between said point P′ and said point E is less than said D (g) when said element (B (h) when said element (E (i) searching for a unworkable element for all elements of said set Ms; and (j) when no unworkable element is found for all elements of said set Ms, defining first components of elements in said set Ms as fragmentation points for said segment.