Patent ID: 8221965

Claim:
An antireflective coating composition comprising a polymer which does not contain an aromatic chromophore, and a thermal acid generator, where the polymer comprises a structural unit derived from a diacid, a triacid, a dianhydride or its corresponding tetraacid or a mixture thereof and a structural unit derived from a diol, a triol, a diepoxy containing compound, a triepoxy containing compound, or mixture thereof, wherein the polymer comprises a moiety 3 and further where the polymer comprises a repetitive unit of structure (1) or (2) where each of Y and Y1 independently are a non-aromatic linking moiety; each of Z and Z1 independently are the structural unit derived from a group selected from a diol, a triol, a diepoxy containing compound, a triepoxy containing compound, a diepoxy compound containing a moiety 3 and a triepoxy compound containing a moiety 3; each of R 1 and R 10 independently are hydrogen or the structural unit derived from a monoepoxy containing compound; each of R 2 and R 20 are independently selected from structural unit derived from a diepoxy containing compound, structural unit derived from a triepoxy containing compound, structural unit derived from a diepoxy compound containing a moiety 3, and structural unit derived from a triepoxy containing compound-containing a moiety 3, provided an epoxy group is present such that the polymer is capable of forming a self crosslinked polyester; each of Q1, Q2, Q3, and Q4 are independently a direct bond or an unsubstituted or substituted C 1-4 alkylene; each of h and h1 are 1; and each of k or k1 independently are 0 or 1,wherein moiety 3 is