Patent ID: 9541830
Date: 2017-01-10
CPC Classifications: C08F,G03F

Claim:
1. A method of forming a patterned organic thin film comprising the steps of: a) providing a substrate; b) forming a thin film of a block copolymer comprising a positive-tone polymer block and a negative-tone polymer block on the substrate, wherein the thin film has periodic microdomains; c) aligning the periodic microdomains of the thin film; d) exposing at least a portion of the thin film from b) to deep-UV or e-beam radiation to differentially affect the positive-tone polymer blocks and negative-tone polymer blocks in the exposed portion of the thin film such that an exposed pattern, and, optionally, an unexposed portion, of thin film is/are formed; and e) exposing the thin film from d) to a solvent such that the unexposed portion of block copolymer thin film, if present, and selected regions of the exposed portion of the thin film are removed, and a patterned organic thin film of the negative-tone polymer blocks or a patterned organic thin film of the positive-tone polymer blocks is formed.