| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of a crack owing to the deterioration of machinability and to prevent the breakage of vibrators owing to stress on the adhesive surfaces of the vibrators with a backing material by using the backing material having a specified hardness in an ultrasonic probe where many vibrators are arranged in an array shape. SOLUTION: A material with an A-scale hardness H being 70 <=H<=89 which is stipulated by JIS-K6301 is used for the backing material in the ultrasonic probe which is utilized for an ultrasonic wave image device being a medical diagnostic device and where vibrators are arranged in the array shape. Thus, the breakage of the vibrators when the backing material is adhered to the vibrators is prevented and also the crack is prevented from occurring in the vibrators owing to the deterioration of the array machinability. Piezoelectric monocrystal by a perovskite complex oxide which is stipulated by a formula: pb((Zn1/3Nb(2/3)-(2z/3)Ta2z/3)1-x-yTixM2y)03 is adopted as the vibrators to be utilized. M2 means Pt, Fe, Bi or Rh or the like in the formula.
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