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

摘要

Common internal electrodes 27 and segment internal electrodes 28 are laminated alternately with a piezoelectric material 29 between and a common external electrode 30 and a segment external electrode 31 are provided on the surface, forming a drive vibrator 24 . A free end part 24 a of the drive vibrator 24 is formed with an active region L and can be expanded and contracted in the length direction of the vibrator. A piezoelectric material 29 of the outermost layer in the free end part 24 a can be operated based on the potential difference between the external and internal electrodes and a portion of the active region L in the external electrode is used as a trimming portion with an effective length x varied by trimming.