Ultrasonic probe and production method thereof

A manufacturing method and ultrasonic technology, which is applied in the field of ultrasonic probes, can solve problems such as the decrease of the transmission characteristics of the detection signal, the increase of the electrical impedance of the vibrator, and the reduction of the size of the vibrator, so as to improve the electromechanical coupling coefficient, reduce the electrical impedance, and reduce the acoustic impedance.

Inactive Publication Date: 2008-10-08
FUJIFILM CORP
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  • Abstract
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  • Claims
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Problems solved by technology

[0017] However, as the vibrator becomes smaller, the electrical impedance of the vibrator increases
When the electrical impedance of the vibrator in the frequency band of ultrasonic waves transmitted and received is larger than the electrical impedance of the receiving circuit of the main body of the ultrasonic diagnostic device or the characteristic impedance of the connecting cable, the transmission characteristics of the detection signal will deteriorate.
In addition, the size of the vibrator becomes smaller, and the sensitivity at the time of reception decreases

Method used

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  • Ultrasonic probe and production method thereof
  • Ultrasonic probe and production method thereof
  • Ultrasonic probe and production method thereof

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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below with reference to the drawings. In addition, the same reference numerals are assigned to the same constituent elements, and description thereof will be omitted.

[0034] figure 1 It is a schematic plan view showing an ultrasonic transducer array (transducer array) used in the ultrasonic probe according to the first embodiment of the present invention. This vibrator array includes a plurality of ultrasonic transducers (vibrators) 1 that expand and contract when supplied with a driving signal, transmit ultrasonic waves to a subject to be detected, and output electrical signals (detection signals) by receiving ultrasonic waves reflected by the subject to be detected. . exist figure 1 In the figure, in order to show the arrangement of the vibrators 1 , the upper electrode layer of the vibrators 1 and the insulating resin between the vibrators 1 are omitted. In addition, among the plurality of vibrato...

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Abstract

An ultrasonic probe realizing a high sensitivity and a wide band thereof while miniaturizing a transducer and also taking into consideration a measure against generated heat. The ultrasonic probe includes: a backing material; a transducer array having a multi-layered structure in which a plurality of transducers are arranged in a first direction to compose a transducer group and a plurality of the transducer groups are arranged in a second direction different from the first direction; a first layer of conductive resin electrically connecting the first electrode layers of adjacent transducers with each other in each transducer group; a second layer of conductive resin electrically connecting the internal electrode layers of adjacent transducers with each other in each transducer group; and an insulating resin disposed in a predetermined region among the plurality of transducers in each transducer group.

Description

technical field [0001] The present invention relates to an ultrasonic probe for transmitting and receiving ultrasonic waves in an ultrasonic diagnostic device, and further relates to a manufacturing method of the ultrasonic probe. Background technique [0002] In an ultrasonic probe, piezoelectric ceramics represented by PZT (lead zirconate titanate: Pb(lead) zirconate titanate) and PVDF (polyester) are generally used as ultrasonic transducers for transmitting and / or receiving ultrasonic waves. Vinylidene fluoride: polyvinyliden difluoride) is a vibrator (piezoelectric vibrator) in which electrodes are formed at both ends of a piezoelectric body such as a piezoelectric polymer material. [0003] When a voltage is applied to the electrodes of such a vibrator, the piezoelectric body expands and contracts due to the piezoelectric effect, and elastic waves are generated. In particular, a resonant elastic wave having a wavelength corresponding to the thickness of the piezoelectr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00A61B8/12G01N29/24
Inventor 大泽敦
Owner FUJIFILM CORP
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