PURPOSE: To realize an inverted polarization ultrasonic wave prove and a high density paper-tablet vibrator.
CONSTITUTION: A comb-line vibrator 2 is obtained by applying groove-cutting to one side of a piezoelectric body polarized uniformly at an arrangement pitch 2P being twice an arrangement pitch P with a blade whose width is nearly equal to the arrangement pitch P. Other comb-line vibrator 2 obtained by the similar procedure is fitted to the vibrator 2 above with each other, and in order to obtain the part having the arrangement pitch P, the piezoelectric body 1 is cut till the arrangement part having the arrangement pitch P from the upper and the lower part. Electrodes are provided to both sides obtained to form an arrangement vibrator 5. As a result, the arrangement pitch of the vibrator is doubled, a conventional probe, a high density composite piezoelectric body and an inverted polarization arrangement vibrator are easily obtained and a high performance probe is realized.
NAKATANI CHITOSE
KATAKURA KAGEYOSHI
NARENDORA SANGUBI
