| 摘要 |
An ultrasonic surgical apparatus includes a treatment portion, a driving portion which drives the treatment portion by resonance, an operation portion main body which drives and controls the driving portion, and a connecting portion which connects the treatment portion and the operation portion main body. The driving portion includes a piezoelectric film and is formed on the treatment portion inside the connecting portion. The piezoelectric film has a perovskite structure, with crystals constituting the perovskite structure being oriented in the (100) direction or the (001) direction with a degree of orientation of not less than 60%.
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