Patent ID: 7846616
Filing Date: 2010-12-07
Classification: G03F

Abstract:
1. A lithography mask, comprising: a pattern for a first feature of a semiconductor device having a first width and a pattern for at least one second feature of the semiconductor device having a second width disposed proximate the pattern for the first feature, the pattern for the first feature being spaced apart from the pattern for the at least one second feature by a forbidden pitch, wherein the pattern for the first feature comprises a pattern for a first sub-feature having a third width and a pattern for at least one second sub-feature having a fourth width, wherein the pattern for the second feature comprises a pattern for a first sub-feature having a fifth width and a pattern for at least one second sub-feature having a sixth width, wherein the pattern for the first sub-feature of the first feature is separated from the pattern of the at least one second sub-feature of the second feature by a first distance, the first distance being different than the forbidden pitch, wherein the first width is different than the third width and fourth width, wherein the second width is different than the fifth width and the sixth width and wherein the sub-features comprise a substantially opaque material.