Patent ID: 7326518

Claim:
A photoresist composition comprising: i) one or more photoacid generator compounds, ii) one or more resins that comprise a structure of the following Formula (I): wherein: R is a non-hydrogen substituent; R 1 is a non-hydrogen substituent that does not include a hydroxy or carboxy group; Acetal/Alicyclic is a substituent that includes both i) one or more photoacid-labile acetal groups and ii) one or more alicyclic groups; each Z is independently hydrogen or optionally substituted C 1-6 alkyl; m is an integer of from 0 to 4; n is an integer of from 0 to 5; w, x and y are mole percents of the respective polymer units based on total units of the polymer and each of w, x and y are greater than zero.