| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet printer head and its manufacturing method. SOLUTION: The ink jet printer head has a substrate on one face of which an ink chamber is formed and in which a channel for supplying ink to the ink chamber is formed at a bottom face of the ink chamber, a nozzle plate which includes a penetrating nozzle corresponding to a center of the ink chamber, and at least two insulating layers formed on the substrate, a bubble guide formed inside the nozzle plate and extending from the nozzle into the ink chamber, and a heater set between the insulating layers to surround the nozzle. A hydrophobic coating layer is formed on a surface of an uppermost layer of the nozzle plate, and a droplet ejecting port which has a diameter smaller than that of the nozzle of the nozzle plate and is disposed on the same axis as that of the nozzle is formed in the hydrophobic coating layer. The nozzle plate is prevented from becoming wet due to the ink, and a stability of an ink spray from the nozzle and a consecutive spray performance are improved. COPYRIGHT: (C)2004,JPO
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