Patent ID: 8680671

Claim:
A method, comprising: forming a first mask layer and a second mask layer, the second mask layer being on the first mask layer, the first and second mask layers having first and second features, respectively; at least partially covering the first mask layer and the second mask layer with a film; forming openings in the film by removing the second feature; and defining a pattern in a microelectronic layer by patterning the first feature through the openings in the film, wherein forming the first mask layer and the second mask layer includes: defining the second feature by forming a photoresist mask layer on the second mask layer; and defining the first feature by forming spacers, wherein each of the spacers includes material that is on a sidewall of the second feature but not directly on top of the second feature, and wherein a height at a highest point of each spacer of the spacers is substantially equal to a combined height of the second mask layer and a photoresist mask layer.