Patent ID: 7638436

Claim:
A method of forming a patterned structure, comprising: forming a first layer comprising silicon and nitrogen over a substrate; forming a sacrificial layer on the first layer, the sacrificial layer consisting of silicon or conductively-doped silicon; forming a layer of imagable material on the sacrificial layer; patterning the imagable material; while the imagable material is on the sacrificial layer, transferring a pattern from the patterned imagable material to the underlying first layer and sacrificial layer to form a patterned structure comprising the first layer and sacrificial layer; the patterned structure having a pair of opposing sidewalls extending upwardly from the substrate; a pair of opposing corners being defined where the sidewalls join the substrate; a distance between the opposing corners being less than a corresponding distance the patterning would produce in an absence of the sacrificial layer; and removing the sacrificial layer from the patterned structure.