Patent ID: 8692234

Claim:
A polymer compound comprising a repeating unit represented by the following formula (I): wherein R 1 and R 2 each independently represent a hydrogen atom, an aromatic hydrocarbon group optionally having a substituent except a crosslinking group, an aromatic heterocyclic group optionally having a substituent except a crosslinking group, or an alkyl group optionally having a substituent except a crosslinking group, R 1 and R 2 may bond to each other to form a ring; n indicates an integer of from 0 to 3; Ar 1 and Ar 2 each independently represent a direct bond, an aromatic hydrocarbon group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent; Ar 3 to Ar 5 each independently represent an aromatic hydrocarbon group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent; T represents a group comprising a crosslinking group, wherein the crosslinking group is selected from the group of crosslinking groups consisting of: wherein R 21 and R 23 to R 25 each independently represent a hydrogen atom or an alkyl group; Ar 41 represents an aromatic hydrocarbon group optionally having a substituent, or an aromatic heterocyclic group optionally having a substituent; the benzocyclobutene ring may have a substituent; the substituents may together form a ring, provided that when Ar 1 , Ar 2 and Ar 4 are fluorene rings, then they do not have a group comprising a crosslinking group as the substituent.