Patent ID: 9229324
Filing Date: 2016-01-05
CPC Classification: B82Y,G03F,H01L

Claim Text:
1. A method of forming a patterned template, comprising a chemical epitaxy template, on a substrate, for orientation of a self-assemblable block copolymer comprising first and second polymer blocks, the method comprising: selectively exposing a first portion of a positive tone resist layer on the substrate with actinic radiation by a photolithographic method, leaving an unexposed portion at an outer face of the resist layer having a width greater than or equal to a critical dimension size of the photolithographic method, wherein the selective exposure is carried out with an intensity of actinic radiation sufficient to expose a continuous region of the resist layer between exposed portions, leaving an interfacial unexposed resist portion at an interface, opposed to the outer face, of the resist layer with the substrate, having a width less than the critical dimension size of the photolithographic method; and removing the exposed resist layer, the unexposed resist portion left as first remaining resist portions at the interface, separated by a portion of bared substrate, wherein the first remaining resist portions provide a basis for the chemical epitaxy template of the patterned template.