Patent ID: 7541118
Filing Date: 2009-06-02
Classification: G03F

Abstract:
1. A phase shift mask comprising: a first non-phase shift region at which the mask can transmit an exposure light incident thereon; a first phase shift region at which the mask can also transmit the exposure light incident thereon, said first phase region transmitting exposure light out of phase with respect to the exposure light transmitted by said first non-phase shift region; a second non-phase region at which the mask can transmit the exposure light incident thereon; a second phase shift region at which the mask can also transmit the exposure light incident thereon, said second phase region transmitting exposure light that is out of phase with respect to the exposure light transmitted by said second non-phase shift region; and an opaque region at which the mask is opaque to the exposure light incident thereon, said opaque region having a first contiguous section spanning and thereby separating said second non-phase shift region and said second phase shift region from one another, and said opaque region having a second contiguous section spanning and thereby separating one of the first phase and non-phase shift regions and one of the second phase and non-phase regions, but no section of the mask that is opaque to the exposure light interposed between or otherwise separating said first non-phase shift region and said first phase shift region from one another.