| 摘要 |
<p>[Problem] The purpose of the present invention is to provide a liquid ejection head in which the plates constituting the fluid passage member, as well as the piezo actuator substrate and the fluid passage member, are joined in a satisfactory fashion; a recording device employing the same; and a piezo actuator substrate for use therein. [Solution] The liquid ejection head (2) includes: a fluid passage member (4) comprising a plurality of stacked tablular plates (4a-l) and provided with a pressurization chamber (10), a plurality of ejection holes (8), and a common liquid passage (5); and a piezo actuator substrate (21) stacked on the fluid passage member (4), and having a plurality of displacing elements (30) disposed thereon. On one principal face of the piezo actuator substrate (21) are disposed a plurality of connection electrodes (26, 27) for supplying drive signals to the displacing elements (30). The number of connection electrodes (26, 27) per unit area disposed in a first region (D1) not overlapping the common liquid passage (5) is greater than the number of connection electrodes (26, 27) per unit area disposed in a second region (D2) overlapping the common liquid passage (5).</p> |
