| 摘要 |
PROBLEM TO BE SOLVED: To reduce an irregularity in position accuracy of end parts of a surface treatment layer and an irregularity in liquid drop discharge characteristic by forming an insulating layer to a face of a nozzle form member at the side of a liquid channel of a conductor base and to an inner wall face of a nozzle hole of the nozzle form member and, forming the surface treatment layer to a surface of the conductor base. SOLUTION: The ink jet head has an electrode substrate 3 set to the lower side of a diaphragm substrate 1 via a gap member 2, a liquid chamber substrate 4 as a liquid channel member set to the upper side of the diaphragm substrate 1, and a nozzle plate 5 set above the liquid chamber substrate. Discharge chambers 7 to which each of nozzles 6 connects, a common ink chamber 8 for supplying ink to each discharge chamber 7, a fluid resistance part 9 connecting both chambers 7 and 8, and the like are formed in the ink jet head. An individual electrode 15 opposite to a diaphragm 11 is buried in the electrode substrate 3. In this case, an insulating layer 21 is formed to a face of the nozzle plate 5 at the side of a liquid chamber of a conductor base 20, and a water-repellent layer 22 as a surface treatment layer is formed to a surface of the conductor base 20, whereby an irregularity in liquid drop discharge characteristic is restricted.
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