Patent ID: 7427456

Claim:
A layout of vertical patterns in a mask used in a dipole exposure apparatus employing a dipole as an aperture, comprising: the vertical patterns disposed vertically to the dipole, in which one of the vertical patterns is positioned on an active region and extends across a boundary region between the active region and an inactive region in the mask, to have an end portion terminated in the inactive region; and tabs, having a critical dimension broader than those of the vertical patterns by 5 nm˜10 nm, crossing edges of the vertical patterns, wherein the tabs are formed at the edges of the vertical patterns placed at the boundary region between the active region and the inactive region in the mask, and wherein the tabs compensate a deterioration of an exposure resolution generated from the edges of the vertical patterns placed at the boundary region when the vertical patterns are transferred to a wafer by the exposure apparatus, so that a difference between a first critical dimension of an edge portion of the vertical pattern placed at the boundary region and a second critical dimension of a center portion of the vertical pattern is reduced.