| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric actuator substrate capable of being manufactured as a non-defective product even when a ceramic substrate which is currently manufactured is partially defective, and to provide a liquid discharge head including the piezoelectric actuator substrate, and a recording apparatus.SOLUTION: A piezoelectric actuator substrate 21 comprises: a diaphragm; a common electrode; a piezoelectric ceramic layer having a plurality of through holes 39; a plurality of individual electrodes 35 arranged in a region, facing the common electrode, of the piezoelectric ceramic layer; and common surface electrodes 72 arranged inside and around the plurality of through holes 39 of the piezoelectric ceramic layer. The piezoelectric actuator substrate 21 is long in a first direction and has a pair of sides 21-1 which are substantially parallel and extended in a direction crossing the first direction. The plurality of through holes 39 are arranged only near the pair of sides 21-1 so as to be arranged along each of the pair of sides 21-1. |
