| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet printer head which achieves excellent ink ejection without causing troubles such as changes in ink quality or the like, when using ink having electric conductivity like aqueous ink or the like, and its manufacturing method. SOLUTION: The ink jet printer head (1) has a plurality of pressure chambers (13) to which ink is supplied, nozzles which are provided for every pressure chamber and communicate the pressure chamber with the outside, and a main body a part of which is formed of piezoelectric materials (2, 3). Electrodes (7) for applying voltage to the piezoelectric materials are provided in every pressure chamber to change the volume of the pressure chamber. The surface of these electrodes are coated with an insulating film (16) to insulate the ink electrically, and the surface of the insulating film is locally or entirely coated with a metallic film (30).
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