| 摘要 |
In order to provide a liquid ejection head which enables ejection of a droplet at a higher frequency, according to the invention, a piezoelectric vibrator has a multilayer structure. In the multilayer structure, an upper piezoelectric layer and a lower piezoelectric layer are laminated one on another. A drive electrode is formed at a boundary between the upper piezoelectric layer and the lower piezoelectric layer and is electrically connected to a source for supplying a drive signal. An upper common electrode is formed on the surface of the upper piezoelectric layer. A lower common electrode is formed on the surface of the lower piezoelectric layer. An inertance of a nozzle orifice and an inertance of an ink supply port are set so as to become greater than an inertance of a pressure generating portion.
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