Patent ID: 9235125
Filing Date: 2016-01-12
CPC Classification: B82Y,G03F

Claim Text:
1. A method of forming a patterned chemical epitaxy template, for orientation of a self-assemblable block copolymer comprising first and second polymer blocks, on a surface of a substrate, the method comprising: applying a primer layer of a primer composition to the surface, the primer composition comprising a first polymer moiety having a chemical affinity with the first polymer blocks and a second polymer moiety having a chemical affinity with the second polymer blocks, wherein the primer layer presents a primer layer surface comprising the first and second polymer moieties, selectively exposing the surface, the primer layer and any overlying layer to actinic radiation to provide exposed and unexposed regions, to render labile the first polymer moiety in the exposed region, and removing the labile first polymer moiety from the exposed region, while leaving at least some of the second polymer moiety in the exposed region, to deplete the primer layer surface in the exposed region of first polymer moiety to form the patterned chemical epitaxy template.