Patent ID: 7790335

Claim:
A manufacturing method of semiconductor device in which pattern transfer is performed by a double exposure process, said manufacturing method comprising the steps of: performing exposure with a first mask including a first pattern and a second pattern; and performing exposure with a second mask including a third pattern, said second pattern includes a first portion and a second portion in which when the double exposure process is performed, said first portion, which is overlapping with the third pattern, has the width equal to or larger than the resolution limit, and said second portion of the second pattern, which is not overlapping with the third pattern, has the width equal to or smaller than the resolution limit; said first pattern includes a third portion and a fourth portion in which when the double exposure process is performed, said third portion, which is overlapping with the third pattern, has the width equal to or larger than the resolution limit, and said fourth portion, which is not overlapping with the third pattern, has the width equal to or larger than the resolution limit; and by the double exposure process, said first portion of the second pattern is erased by the third pattern and only the first pattern is transferred.