Patent ID: 8502209

Claim:
A polymer compound comprising a repeating unit represented by the formula (I): wherein X 1 represents an oxygen atom, a sulfur atom or —N(R N )—, R 1 , R 2 and R N represent each independently a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, an arylalkyl group, an arylalkoxy group, an arylalkylthio group, an arylalkenyl group, an arylalkynyl group, a mono-valent heterocyclic group, a heterocyclic thio group, an amino group, a substituted amino group, a silyl group, a substituted silyl group, an acyl group, an acyloxy group, an imine residue, an amide group, an acid imide group, a carboxyl group, a substituted carboxyl group, a cyano group or a nitro group, R 3 and R 4 represent each independently a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, an arylalkyl group, an arylalkoxy group, an arylalkylthio group, an arylalkenyl group, an arylalkynyl group, a mono-valent heterocyclic group, a heterocyclic thio group, an amino group, a substituted amino group, a silyl group, a substituted silyl group, an acyl group, an imine residue, an amide group, an acid imide group, a carboxyl group, a substituted carboxyl group, a cyano group or a nitro group, and plurality of R 2 s may be the same or mutually different.