| 摘要 |
PROBLEM TO BE SOLVED: To provide an inkjet recording head in which a shock force generated at the time of defoaming of bubbles is suppressed while an energy efficiency of ink ejection is kept high. SOLUTION: The inkjet recording head has an ejection opening 5 where ink ejects, a pressure chamber 3 where an energy for ejection is applied to the ink, and a nozzle part 1 which makes the pressure chamber 3 and the ejection opening 5 communicate with each other. A large diameter part 8 which has a larger cross section than an area of the ejection opening 5, and a small diameter part 9 which has a smaller cross section than the cross section of the large diameter part 8 are formed along an ejection direction of the ink at the nozzle part 1. Moreover, the small diameter part 9 is set between the large diameter part 8 and the pressure chamber 3. COPYRIGHT: (C)2006,JPO&NCIPI
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