Patent ID: 8034546

Claim:
A method for the formation of a patterned resist layer on a substrate surface, the method comprising the steps of: forming a coating layer; selectively irradiating said coating layer; and developing to selectively dissolve away said irradiated layer, wherein the coating layer comprises a methanofullerene derivative having a plurality of open-ended addends, said methanofullerene being represented by the formula C 2x (CR 1 R 2 ) m where x is at least 17, m is at least 2, each addend represented by CR 1 R 2 is the same or different, and wherein each R 1 and R 2 is each a monovalent organic group, or a divalent organic group which forms a ring structure by being joined to the fullerene shell, or where both R 1 and R 2 of an addend are divalent groups, they may be mutually joined to form a ring structure, save that at least two of R 1 or two of R 2 are monovalent, or a mixture of such derivatives, wherein the methanofullerene derivative has one or more addends satisfying the formula: wherein R 3 and R 4 are independently selected from —[(CH 2 ) n O q ] p —R 5 —, n is from 1 to 8, p is from 1 to 5, q is 0 or 1, and R 5 is selected from the group consisting of straight alkyl, branched alkyl, cycloalkyl, a heterocycle, a substituted aromatic moiety, and an unsubstituted aromatic moiety, and the bridge is —[O q (CH 2 ) n O q ] p —.