Piezoelectric vibrator unit, liquid jet head, manufacturing method of piezoelectric vibrator unit, and manufacturing method of liquid jet head

摘要

In a piezoelectric vibrator unit (4) provided with a plurality of piezoelectric vibrators (29) each having internal electrodes (32,33) and piezoelectric material layers (31) laminated alternately, a free end part (23a) of an outermost layer (31a) of a piezoelectric vibrator is trimmed to form a partial recess, thereby adjusting a natural vibration period of the piezoelectric vibrator. The vibrator unit is preferably part of a liquid jet unit such as in ink jet printing heads.