| 摘要 |
PURPOSE:To obtain an inexpensive sector scanning type ultrasonic probe which eliminates the need for a control circuit by forming plural piezoelectric ceramic vibrators on the surface of an ultrasonic absorber opposite to where a notch is formed, and curving the absorber by utilizing the notch. CONSTITUTION:A piezoelectric ceramic plate 8 provided with electrodes 6 and 7 on both top and reverse surfaces is adhered with an adhesive to one surface of the rectangular ultrasonic absorber 5 which has the V-shaped notch 4 in the other surface and is small in rigidity. Then, the ceramic plate 8 is cut to form plural piezoelectric ceramic vibrators 9. Then the absorber 5 is curved arcuately by utilizing the notch 4 so that the surface provided with the vibrators 9 projects out. In this state, one surface of the absorber 5 is coupled with a block 11 for fixation, and then acoustic matching layers 12 are formed on the top surfaces of the vibrators 9. Consequently, the inexpensive sector scanning type ultrasonic probe which eliminates the need for a control circuit is obtained.
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