Patent ID: 8455364
Filing Date: 2013-06-04
Classification: H01L

Abstract:
1. A method, comprising: providing a structure comprising at least one lithographic layer on a substrate, where the at least one lithographic layer comprises a planarization layer (PL) and first and second silicon-containing layers, where the PL does not comprise photoresist; forming a sacrificial mandrel by patterning and removing the second silicon-containing layer, removing at least a portion of the PL, and removing a portion of the first silicon-containing layer around a remaining portion of the PL using a photolithographic process, where the sacrificial mandrel comprises at least a portion of the PL, wherein the portion of the first silicon-containing layer removed has a thickness that is about or greater than the thickness of the second silicon-containing layer and less than the total thickness of the first silicon-containing layer; and producing at least one microstructure by using the sacrificial mandrel in a sidewall image transfer process.