Patent ID: 8129491

Claim:
A method for preparing an anti-reflective coating on a substrate, said method comprising (I) applying an anti-reflective coating composition onto a substrate to form a coated substrate, wherein the anti-reflective coating composition comprises (A) a siloxane resin having the formula (HSiO 3/2 ) a (RSiO 3/2 ) b (SiO 4/2 ) c where R is Z, Z(CH 2 ) n or ZO(CH 2 ) n where Z is a phenyl or substituted phenyl group; n has a value of 1 to 6, a has value of 0.2 to 0.5, b has a value of 0.15 to 0.35, c has a value of 0.25 to 0.6 and a+b+c≈1, and (B) a solvent selected from 1- methoxy-2-propanol, propylene methyl ether acetate and cyclohexanone; and (II) curing the coated substrate, to form the anti-reflective coating on the substrate.