Patent ID: 7956145

Claim:
A polymer containing units represented by the following formula (1): wherein Y 1 is an aryl group, and Y 2 is an aryl group, a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, a silyl group, a siloxy group, an alkoxy group, an aralkyloxy group, an aryloxy group, an amino group, an amide group, an imide group, or a hydrocarbylthio group; Y 1 and Y 2 may be linked with each other to form a ring; A 1 , A 2 , A 3 , A 4 , A 5 , A 6 , A 7 , A 8 , A 9 and A 10 are independently of one another a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an aryl group, a silyl group, a siloxy group, an alkoxy group, an aralkyloxy group, an aryloxy group, an amino group, an amide group, an imide group, or a hydrocarbylthio group; m is 0 or 1; and n is an integer of 1 to 20.