| 摘要 |
Disclosed is a photo mask used for fabricating a semiconductor device, capable of ensuring a process margin for a photo process in a pattern region where it is difficult to use an assist feature. The photo mask includes a line/space pattern part for forming a line/space pattern on a wafer. The line/space pattern part includes an outermost pattern having a slice pattern so that so that the outermost pattern of the line/space pattern part is divided into two or more pattern segments.
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