Patent ID: 8367309
Filing Date: 2013-02-05
Classification: G03F

Abstract:
1. A method of forming a pattern including a first pattern and a second pattern having a first minimum dimension which is a minimum dimension of spanning dimensions and a third pattern having a second minimum dimension which is a minimum dimension of spanning dimensions, comprising: a first exposure step of performing an exposure for forming said first pattern and said second pattern using a Levenson-type mask; and a second exposure step of performing an exposure for forming said third pattern using a half tone-type mask, wherein said Levenson-type mask comprises: a transparent substrate and a light shielding film arranged on a main surface of said transparent substrate and having a plurality of opening portions, wherein said opening portions includes: a first pair of a first same-phase opening portion and a first-reverse phase opening portion on opposite sides of said first pattern; and a second pair of a second same-phase opening portion and a second reverse-phase opening portion on opposite sides of said second pattern, wherein said first reverse-phase opening portion and said second reverse-phase opening portion have concave portions, and wherein said first or second same-phase opening portion is set in at least one of said opening portions that form said first and second pairs opposed to each other.