| abstract |
This invention pertains to silsesquioxane resins useful in antireflective coatings wherein the silsesquioxane resin is comprised of 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 where 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; R is selected from a hydroxyl producing group; and R 1 is selected from substituted phenyl groups, ester groups, polyether groups; mercapto 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; wherein in the resin m has a value of 0 to 0.95; n has a value of 0.05 to 0.95; o has a value of 0.05 to 0.95; p has a value of 0.05 to 0.5; q has a value of 0 to 0.5; and m + n + o + p + q ≈ 1. |