| 主权项 |
1. A liquid discharge apparatus configured to discharge liquid, comprising:
a channel structure in which liquid channels are formed to include a plurality of nozzles aligned in an array direction and a plurality of pressure chambers communicating with the plurality of nozzles respectively and aligned in the array direction; and a piezoelectric actuator including a piezoelectric layer arranged on the channel structure to cover the plurality of pressure chambers, wherein for each of the plurality of pressure chambers, two grooves are formed in the piezoelectric layer to locate on two sides of each pressure chamber in the array direction, and to extend respectively in an orthogonal direction orthogonal to the array direction; wherein among the plurality of pressure chambers, there is an equal separation distance between the two grooves arranged on the two sides of the pressure chamber; and wherein when letting X be positions of the grooves from an edge of the pressure chamber in the array direction, and letting Xc be a center position between the edge of the pressure chamber to the edge of an adjacent other pressure chamber in the array direction, the positions X of the grooves satisfy 0.2Xc−20 μm≦X≦0.6Xc+20 μm. |
