Patent ID: 7510979

Claim:
A method for forming a pattern on a semiconductor device comprising the steps of: (a) coating an organic anti-reflective coating composition on a top portion of a film layer to be etched, wherein the organic anti-reflective coating composition comprises: a light absorbent agent polymer represented by the following formula I; a cross-linking polymer represented by the following formula II; a thermal acid generator; and an organic solvent: wherein each of a and b represents the mole percent of respective monomers and a:b=5 to 95:5 to 95; and, wherein R 4 and R 5 represent independently alkyl groups having 1 to 10 carbon atoms substituted by a branched chain or a main chain; R 3 is a hydrogen or a methyl group; c and d represent the mole percent of respective monomers and c:d=5 to 90:10 to 95; (b) conducting a baking process for the obtained material to generate cross-linkage bonds and form a resultant organic anti-reflective coating; (c) applying a photoresist on a top portion of the organic anti-reflective coating, exposing and developing the photoresist to produce a desired photoresist pattern; and (d) etching the organic anti-reflective coating by using the obtained photoresist pattern as an etching mask and, in turn, the film layer to be etched, thereby forming a pattern on the film layer to be etched.