Patent ID: 6951705

Claim:
A photoresist composition comprising: (a) a polymer comprising: (i) a first repeat unit derived from at least one ethylenically unsaturated compound comprising a vinyl ether and having the structure: C(R 1 )(R 2 )═C(R 3 )O—R where R 1 , R 2 , and R 3 independently area hydrogen atom or an alkyl group ranging from 1 to 3 carbon atoms; R is a substituted or unsubstituted hydrocarbon group containing from 1 to 20 carbon atoms, when R is a substituted hydrocarbon group it contains at least one fluorine, chlorine, bromine or oxygen atom; (ii) a second repeat unit derived from at least one ethylenically unsaturated compound having the structure: (H)(R 4 )C═C(R 5 )(CN) wherein R 4 is a hydrogen atom or a cyano group; R 5 is a hydrogen atom, an alkyl group ranging from 1 to 8 carbon atoms, or a CO 2 R 6 group, wherein R 6 is a hydrogen atom or an alkyl group ranging from 1 to 8 carbon atoms; and (iii) an acidic group, wherein the acidic group is a fluoroalcohol, comprising the structure: —C(R f )(R f ′)OH wherein R f and R f ′ are the same or different fluoroalkyl groups containing from 1 to 10 carbon atoms or taken together are (CF 2 ) n wherein n is an integer ranging from 2 to 10, wherein the fluoroalcohol is optionally protected, and at least one photoactive component.