Patent ID: 7964332

Claim:
A method of forming a pattern of a semiconductor device, comprising: forming an anti-reflective coating layer on a substrate using a composition that includes a polymer, a photoacid generator, a cross-linking agent and a solvent, the polymer including a first repeating unit represented by Formula 1 and having a basic side group, a second repeating unit having a light-absorbing group, and a third repeating unit having a cross-linkable group; forming a photoresist film on the anti-reflective coating layer; exposing the photoresist film and the anti-reflective coating layer to light; and developing the photoresist film and the anti-reflective coating layer to form a photoresist pattern and an anti-reflective coating layer pattern on the substrate, wherein R 1 is a hydrogen atom or C 1 -C 4 lower alkyl, —X— is a divalent group selected from the group consisting of alkylene, arylene, oxyalkylene, alkyleneoxy, oxyarylene, aryleneoxy, carbonyl, oxy, oxycarbonyl, carbonyloxy, carbonylalkylene, carbonylarylene, alkylenecarbonyl, arylenecarbonyl and combinations thereof, and R 2 is the basic side group having nitrogen, the basic side group being selected from the group consisting of amino; alkylamino; alkenylamino; arylamino; alkanoylamino; alkyl, alkenyl, cycloalkyl, cycloalkenyl and aryl, each of which is substituted by at least one selected from amino, alkylamino, alkenylamino, arylamino and alkanoylamino; and heterocycloalkyl, heterocycloalkenyl and heteroaryl, each of which has a nitrogen hetero atom, and wherein the polymer comprises the first repeating unit in a range of about 0.1 to about 0.5% by weight, based on a total weight of the polymer.