| 摘要 |
A hydrophobic treatment method of a nozzle plate used with an ink jet head includes preparing an ink jet head provided with a nozzle plate having a nozzle for ejecting ink, and forming a hydrophobic layer on the nozzle plate, the hydrophobic layer being formed of a silane compound containing a terminal functional group transformed to a hydrophilic functional group using a photochemical reaction. The silane compound is selectively exposed. In the hydrophobic treatment method, both a hydrophobic surface and a hydrophilic surface may be formed on one material layer.
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