Patent ID: 7838200

Claim:
A resist composition, comprising: a polymer comprising first repeating units containing a lactone moiety, said polymer having the properties of being substantially soluble in a first solvent and becoming substantially insoluble in said first solvent after heating said polymer to a first temperature; a thermal base generator capable of releasing a base upon heating said thermal base generator above a second temperature, said thermal base generator is selected from the group consisting of (i) structure: wherein each R 1 or R 2 is independently selected from the group consisting of a hydrogen atom, a linear alkyl, a branched alkyl, a cycloalkyl, a halogenated linear alkyl, a halogenated branched alkyl, a halogenated cycloalkyl, an aryl, a halogenated aryl, and combinations thereof, and (ii) dimers of said structure (i); a photosensitive acid generator capable of releasing acid upon exposure to radiation; and wherein said polymer consists of elements selected from the group consisting of C, N, O, H, F, S and combinations thereof.