Patent ID: 8507179

Claim:
An antireflective coating compositions comprising (I) a silsesquioxane comprising the units (Ph(CH 2 ) r SiO (3-x)/2 (OR′) x ) m (HSiO (3-x)/2 (OR′) x ) n (MeSiO (3-x)/2 (OR′) x ) o (RSiO (3-x)/2 (OR′) x ) p (R 1 SiO (3-x)/2 (OR′) x ) q (II) a compound selected from photo-acid generators and thermal acid generators; and (III) a solvent wherein in the silsesquioxane resin Ph is a phenyl group, Me is a methyl group; R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; each R is a carboxylic acid forming group of general formula —R 2 C(O)OR 3 or a sulfuric acid forming group of general formula —R 2 SO 3 R 3 with optionally trace amounts of the corresponding carboxylic acid or sulfuric acid, wherein R 2 is selected from alkylene groups having 1-10 carbon atoms and polyether groups having the general formula —(CH 2 ) a [O(CH 2 ) b ] f — where a has a value of 1 to 12, b has a value of 2 to 6 and f has a value of 1 to 10 and R 3 is a protecting group selected from t-butyl, trimethylsilyl, anhydride groups, methylthiomethyl ester, benzyloxymethyl ester, diphenylmethyl ester and p-methoxybenzyl ester; and each R 1 is independently selected from substituted phenyl groups, ester groups, polyether groups; mercapto groups, sulfur-containing organic functional groups, hydroxyl producing group, aryl sulfonic ester groups, and reactive or curable organic functional groups; and r has a value of 0, 1, 2, 3, or 4; x has a value of 0, 1 or 2; m has a value of 0 to 0.95; n has a value of 0.05 to 0.95; o has a value of 0 to 0.95; p has a value of 0.05 to 0.5; q has a value of 0 to 0.95; and m+n+o+p+q≈1.