Patent ID: 8653217

Claim:
An antireflecting coating (ARC) composition comprising (i) a silsesquioxane resin having the formula (PhSiO (3-x)/2 (OH) x ) m (HSiO (3-x)/2 (OH) x ) n (MeSiO (3-x)/2 (OH) x ) p where Ph is a phenyl group, Me is a methyl group, x has a value of 0, 1 or 2; m has a value of 0.05 to 0.50, n has a value of 0.10 to 0.70 and p has a value of 0.10 to 0.70, and m+n+p≈1; (ii) a solvent; wherein in the silsesquioxane resin 6 to 38 mol % of the units contain Si—OH groups.