| 摘要 |
PROBLEM TO BE SOLVED: To provide a high reliable ink-jet printer head capable of ejecting an ink stably over a long time, with a pressure accumulation partition wall having a good adhesion property with respect to a substrate. SOLUTION: A common electrode 21, a common electrode feeding terminal, an individual wiring electrode 23, a head generating part 25, a driving circuit 26, and a driving circuit terminal are formed on a chip substrate 20. An eliminating part hole 28 is formed in an electrode connecting wiring part 21-1 in a part facing an opening (ink inlet opening) of a section part 32 formed by a sealing partition wall 31-2 and a section partition wall 31-3 surrounding the heat generating part 25 from three directions. A pressure accumulation partition wall 31-4 is provided by direct contact of a part or the entirety of an upright surface with a passive state film on the chip substrate 20 surface exposed in the eliminating part hole 28. Even if the electrode film is an inactive metal, the adhesion force of the pressure accumulation partition wall 31-4 to be contacted directly with the passive state film on the chip substrate 20 surface via the eliminating part hole 28 so that the risk of lacking or collapse in a curing step or another step can be eliminated.
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