Patent ID: 8513359

Claim:
A method for fabricating a film comprising nanoscale microstructures, comprising: forming a solution comprising an azido-functionalized random graft copolymer by: reacting a reaction mixture comprising p-chloromethylstyrene monomers to form a p-chloromethylstyrene homopolymer comprising chloromethyl moieties and repeating units derived from p-chloromethylstyrene; reacting the p-chloromethylstyrene homopolymer with one or more oligomers or polymers of poly(ethylene oxide) to form a graft copolymer comprising chloromethyl moieties, wherein the poly(ethylene oxide) has only one nucleophilic end; and reacting the graft copolymer with an azide compound to displace chlorine atoms of the chloromethyl moieties to form azidomethyl moieties on the graft copolymer, wherein the azide compound is selected from the group consisting of sodium azide and R(N 3 ) X , where R is a metal atom other than sodium, a hydrogen atom or an ammonium radical, and x is greater than zero; applying the solution comprising the azido-functionalized random graft copolymer to a floor of at least one trench in a substrate to form a random graft copolymer material; crosslinking at least a portion of the random graft copolymer material; forming a self-assembling block copolymer on the random graft copolymer material; and annealing the self-assembling block copolymer to form a material comprising self-assembled polymer domains.