| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet head which can be compactified and can be enhanced in resistance to liquid contact, as to the ink jet head which is equipped with a nozzle for ejecting ink drops, an ejecting chamber communicating with the nozzle, a vibration plate forming a wall face of the ejecting chamber and a driving means for changing the shape of the vibration plate, and ejects ink drops from the nozzle by pressurizing ink in the ejecting chamber by driving the driving means. SOLUTION: A flow path substrate 1 having a vibration plate 10 and an electrode substrate 2 having an electrode 15 are laminated. An ink supplying aperture 9 passing through the flow path substrate 1 and the electrode substrate 15 is formed and a silicon oxide film 21 is formed on the wall face of the ink supplying aperture 9.
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