Ultrasound transducer unit, array and ultrasonic treatment device
AssigneeShenzhen Peninsula Medical Group
InventorsPengbo Liu, Yanan Li, Xiaobing Lei, Yujia Peng, Jianrong Luo, Zhibing Liu
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Abstract
Disclosed are an ultrasonic transducer unit, an array and an ultrasonic treatment device. The ultrasonic transducer unit includes a backing layer, a heavy backing layer, a piezoelectric layer and a matching layer stacked in sequence. The thickness of the piezoelectric layer ranges from 0.125 times of the wavelength to 0.25 times of the wavelength, excluding 0.25 times of the wavelength. The wavelength refers to the wavelength of the wave at the center frequency of the ultrasonic transducer unit in the piezoelectric layer.
Claims12
An ultrasonic transducer unit, comprising
- a backing layer;
- a heavy backing layer;
- a piezoelectric layer;
- and
- a matching layer,
- wherein the backing layer, the heavy backing layer, the piezoelectric layer and the matching layer are stacked in sequence;
- a thickness of the piezoelectric layer ranges from 0.125 times of a wavelength to 0.25 times of the wavelength, excluding 0.25 times of the wavelength;
- the heavy backing layer is configured to damp vibration of a back surface of the piezoelectric layer to substantially zero vibration;
- a contact surface between the heavy backing layer and the piezoelectric layer is defined as a nodal plane of vibration;
- and
- when the piezoelectric layer vibrates, a displacement of the contact surface in a vibration direction is zero, and the wavelength refers to a wavelength of a wave at a center frequency of the ultrasonic transducer unit in the piezoelectric layer.
Dependencies are inferred from the claim text.