Patent ID: 9672309
Date: 2017-06-06
CPC Classifications: G06F,H01L

Claim:
1. A method for generating a layout pattern, comprising: providing a basic layout pattern to a computer system, wherein the basic layout pattern comprises a plurality of first stripe patterns in a first cluster region, each of the first stripe patterns extends in a first direction, and the first stripe patterns have equal pitches in a second direction; generating a plurality of anchor bar patterns, wherein each of the anchor bar patterns extends in the first direction, and the anchor bar patterns have equal pitches in the second direction, wherein edges of at least one of the anchor bar patterns in the second direction are aligned with edges of two adjacent first stripe patterns respectively, and at least one of the anchor bar patterns overlaps a first space between two adjacent first stripe patterns; generating a first mandrel pattern at the first space overlapped by the anchor bar pattern; and forming a photomask, wherein the first mandrel pattern is outputted to the photomask.