Patent ID: 7045268

Claim:
A photoresist composition comprising: (A) at least two polymers selected from the group consisting of: (a) a fluorine-containing copolymer comprising a repeat unit derived from at least one ethylenically unsaturated compound characterized in that the at least one ethylenically unsaturated compound is polycyclic; (b) a branched polymer containing protected acid groups, said polymer comprising one or more branch segment(s) chemically linked along a linear backbone segment; (c) a fluoropolymer having at least one fluoroalcohol group having the structure: —C(R f )(R f ′)OH wherein R f and R f ′ are the same or different fluoroalkyl groups of from 1 to about 10 carbon atoms or taken together are (CF 2 ) n wherein n is 2 to about 10; and a nitrile/fluoroalcohol-containing polymer prepared from substituted or unsubstituted vinyl ethers; and (B) at least one photoactive component.