| 摘要 |
An ink-jet printer head includes a main body which is provided with a plurality of pressure chambers to which ink is supplied and a nozzle which is provided for each pressure chamber to cause the pressure chamber to communicate with the outside, and whose portion is formed from a piezoelectric material. In each pressure chamber, an electrode for applying a voltage to the piezoelectric material is provided to change the volume of the pressure chamber. A surface of the electrode is coated with an insulating film to electrically insulate the electrode from the ink, and the surface of the insulating film is partially or entirely coated with a metal film.
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