Patent ID: 7264329

Claim:
An inkjet recording head, which comprises a nozzle having: a hole for discharging a recording liquid including an ink; and a portion capable of repelling the ink at the periphery of the hole, wherein the portion comprises a cured film formed from a composition comprising a block copolymer, and the block copolymer comprises: a block polymer (A) comprising a fluorine-containing polymer; and a block polymer (B) comprising a repeating unit having a siloxane structure, wherein the fluorine-containing polymer comprises at least one of a polymeric unit represented by formula (FI), a polymeric unit represented by formula (FII) and a polymeric unit represented by formula (FIII): wherein R 0 represents a perfluoroalkyl group having from 1 to 8 carbon atoms, or an —OR f 1 group; and the R f 1 group represents a fluorine-containing aliphatic group having from 1 to 30 carbon atoms, wherein R 1 and R 2 are the same of different and each represents a fluorine atom or a —C v F 2v+1 group; v represents an integer of from 1 to 4; a represents 0 or 1; b represents an integer of from 2 to 5; and c represents 0 or 1, and wherein R 3 and R 4 each represents a fluorine atom or a —CF 3 group; a represents the same as in formula (FII); d represents 0 or 1; k represents an integer of from 0 to 5; 1 represents an integer of from 0 to 4; m represents 0 or 1; and (k+1+m) represents an integer in the range of from 1 to 6.