Ultrasonic probe device

The ultrasonic probe device addresses the challenge of achieving high acoustic power and compact size by configuring the element stacking and electric field directions in a laminated structure with a piezoelectric single crystal, resulting in improved mechanical quality and coercive field, and reduced size.

WO2025005315A1PCT designated stage expired Publication Date: 2025-01-02IBULE PHOTONICS
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Patent Information

Application Number
PCT/KR2023/008914
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-26
Filing Date
2023-06-27
Publication Date
2025-01-02

AI Technical Summary

Technical Problem

Conventional ultrasonic probes face challenges in achieving high acoustic power characteristics while maintaining a compact size, due to limitations in physical properties such as mechanical quality factor and coercive electric field.

Method used

The ultrasonic probe device incorporates a laminated structure with a piezoelectric single crystal, a matching layer, and conductive members, where the element stacking direction, electric field application direction, and polarization direction are configured to have a predefined relationship, enhancing mechanical quality factor and coercive field, and utilizing a lateral electrode arrangement to reduce the device's size in the axial direction.

Benefits of technology

This configuration secures high acoustic power characteristics and reduces the probe's size by improving mechanical quality factor and coercive field, while maintaining the same level of piezoelectric constant, thus enhancing voltage resistance and output performance.

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Abstract

An ultrasonic probe device according to one aspect of the present invention comprises: a rear layer, a piezoelectric body, and a matching layer that are sequentially stacked; and first and second conductive members disposed, respectively, on first and second surfaces of the piezoelectric body composed of a piezoelectric single crystal, wherein the stacking direction of the rear layer, the piezoelectric body, and the matching layer, the direction of applying an electric field through the first and second conductive members, and the polarization direction of the piezoelectric body have a predefined relation profile.
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Citation Information

Patent Citations

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    JP1997327096A

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  • Manufacturing method of ultrasonic probe

    JP2012182758A

  • Ultrasonic transducer using relaxor ferroelectric polymers

    KR101395264B1

  • Fragrance concentration selectable fragrance device

    KR1020230023169A