Inkjet printer and printer head

An inkjet head having an ink flow path communicated with an ink chamber through an inkjet nozzle and having an orifice plate to which the nozzle is formed, wherein an ink-philic layer is formed on the surface of the ink flow path, and an ink repellent layer is formed on the surface of the orifice plate where the nozzle aperture is formed, the ink-philic layer being made of a polymeric material containing atomic groups of —(O—Si—OH)p, —(Si—O—)q and —(Si—OR—)r, wherein p, q and r are integers of one or more, and the ink repellent layer containing a compound having perfluoropolyether chain and alkoxysilane residue as a terminal.

An inkjet head having an ink flow path communicated with an ink chamber through an inkjet nozzle and having an orifice plate to which the nozzle is formed, wherein an ink-philic layer is formed on the surface of the ink flow path, and an ink repellent layer is formed on the surface of the orifice plate where the nozzle is formed, the ink-philic layer containing an inorganic layer of polymeric silica bonded with a polymer of (Si—OR), and the ink repellent layer containing a compound having perfluoropolyether chain and alkoxysilane residue as a terminal, a water content of the ink-philic layer being 3 wt % or less.

A method of manufacturing an inkjet head having an ink flow path and a nozzle from which ink is jetted, the ink flow path being communicated with an ink chamber and the nozzle, the ink flow path and the nozzle being formed in an orifice plate, which comprises forming an ink repellent layer containing a compound having a perfluoropolyether chain and an alkoxysilane residue as a terminal on a surface of the orifice plate in which the nozzle is formed, and forming an ink-philic layer being made of a polymeric material containing —(O—Si)p—OH, —(Si—O)q— and —(Si—OR)r—, wherein p, q and r are integers of one or more on the surface of the ink flow path.

A method of manufacturing an inkjet head having an ink flow path and a nozzle from which ink is jetted, the ink flow path being communicated with an ink chamber and the nozzle, the ink flow path and the nozzle being formed in an orifice plate, which comprises forming an ink repellent layer containing a compound having a perfluoro chain and an alkoxysilane residue as a terminal on a surface of the orifice plate in which the nozzle is formed, and forming an ink-philic layer containing polymeric silica bound by a polymer of (Si—OR) on the surface of the ink flow path, and wherein a water content of the ink-philic layer is 3 wt % or less.