Patent ID: 8728721

Claim:
A method of processing a substrate, comprising: forming first photoresist on a substrate; selectively exposing a portion of the first photoresist to actinic energy and then negative tone developing the first photoresist to remove an unexposed portion of the first photoresist; forming second photoresist on the substrate over the developed first photoresist; and selectively exposing a portion of the second photoresist to actinic energy and then negative tone developing the second photoresist to remove an unexposed portion of the second photoresist and form a pattern on the substrate which comprises the developed first photoresist and the developed second photoresist, the developed first photoresist of the pattern and the developed second photoresist of the pattern not overlapping one another and comprising respective elevationally outermost surfaces that are not elevationally coincident relative to one another, elevationally outermost surfaces of the developed first photoresist in the pattern being non-planar.