Patent ID: 7968872

Claim:
A polymer comprising repeating unit(s) of the following formula wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently of each other hydrogen, F, SiR 100 R 101 R 102 , or an organic substituent, or R 1 and R 3 , R 4 and R 2 , R 3 and R 4 , and/or any of the substituents R 5 and/or R 6 , which are adjacent to each other, together form an aromatic, or heteroaromatic ring, or ring system, which can optionally be substituted, with the proviso that at least two of the substituents R 1 , R 2 , R 3 and R 4 are an optionally substituted C 6 -C 24 aryl or C 2 -C 20 heteroaryl group, m is 0, or an integer of 1 to 3, n1 and n2 are 0, or an integer 1, or 2, R 100 , R 101 and R 102 are independently of each other C 1 -C 18 alkyl, substituted or unsubstituted C 6 -C 18 aryl, and Ar 1 and Ar 2 are each independently of each other a substituted or unsubstituted arylen, or heteroarylen group.