The present invention features a method of patterning a substrate that
includes forming, on the substrate, a first layer having a first pattern
and selectively shifting in tone, as well as along a first direction, a
subsequent pattern formed into the same layer that corresponds to the
first pattern. To that end, one method of the present invention includes
generating into the first layer, a second pattern having a shape inverse
to the first pattern. A third pattern is then transferred into the first
layer that has a shape inverse to the second pattern.