Guide pattern data correcting method, pattern forming method, and computer readable record medium

A guide pattern data generating method for correcting guide pattern data of a physical guide for formation of a block copolymer material to be microphase-separated,

• wherein:
• the physical guide has a plurality of portions in the guide pattern data, the plurality of portions being disposed along a predetermined direction within a plane based on the pattern data of the plurality of portions, the pattern data of the plurality of portions being included in the guide pattern data, and
• at least two portions out of the plurality of portions are connected to each other,
• the method comprising:
• subjecting the guide pattern data to correction in such a manner that the portions that have both ends respectively connected to other portions rotate about the portion's centroid within the plane wherein:
• the plurality of portions have the same rotation angle;
• and
• the correction causes the size of a region shared by the at least two connected portions to reduce.