Crosslinkable graft polymer non preferentially wetted by polystyrene and polyethylene oxide
First Claim
Patent Images
1. 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(N3)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.
7 Assignments
0 Petitions
Accused Products
Abstract
Methods for fabricating a random graft PS-r-PEO copolymer and its use as a neutral wetting layer in the fabrication of sublithographic, nanoscale arrays of elements including openings and linear microchannels utilizing self-assembling block copolymers, and films and devices formed from these methods are provided. In some embodiments, the films can be used as a template or mask to etch openings in an underlying material layer.
245 Citations
14 Claims
-
1. 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(N3)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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for fabricating a film comprising nanoscale microstructures, the method comprising:
-
forming a solution comprising an azido-functionalized random polystyrene-r-ethylene oxide) graft copolymer by; reacting a reaction mixture comprising p-chloromethylstyrene and styrene to form polymer chains comprising chloromethyl moieties and repeating units derived from p-chloromethylstyrene and styrene, wherein the reaction mixture comprises p-chloromethylstyrene in a molecular amount greater than a molecular amount of styrene; reacting the polymer chains 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 comprising chloromethyl moieties with an azide compound to displace chlorine atoms of the chloromethyl moieties to form azidomethyl moieties on the graft copolymer; applying the solution comprising an azido-functionalized random poly(styrene-r-ethylene oxide) 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. - View Dependent Claims (12, 13, 14)
-
Specification