Patent ID: 7625687

Claim:
A silsesquioxane resin comprising HSiO 3/2 units and RSiO 3/2 units where R is an acid dissociable group having the formula wherein each R 3 are independently a linking group; R 4 a second linking group; L is selected from the group consisting of linear or branch alkylene groups having 1 to 10 carbon atoms, fluoroalkylene groups having 2 to 20 carbon atoms, substituted and unsubstituted arylene groups, substituted and unsubstituted cycloalkylene groups, and substituted and unsubstituted alkarylene groups; R 5 is hydrogen, linear or branched alkyl or fluoroalkyl; R 6 is alkyl or fluoroalkyl; Z is an acid-cleavable group; and g may have a value of 0 or 1 and h may have the value of 0 or 1; and k may have the value of 0 or 1.