Manufacturing method of ultrasonic transducer

A technology for ultrasonic transducers and manufacturing methods, applied in ultrasonic/sonic/infrasonic diagnostics, instruments, material analysis using acoustic/ultrasonic/infrasonic, etc., capable of solving problems such as poor impact resistance, vulnerability to damage, and firm solder joints To improve the impact resistance, ensure firmness and reliability, and resist thermal expansion and contraction.

Inactive Publication Date: 2009-11-04
PHILIPS ULTRASOUND SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can be used in the manufacture of convex arc array and micro-convex array transducers, but the firmness and reliabilit

Method used

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  • Manufacturing method of ultrasonic transducer
  • Manufacturing method of ultrasonic transducer
  • Manufacturing method of ultrasonic transducer

Examples

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Example Embodiment

[0024] According to Figure 6 Describe a preferred embodiment of the present invention;

[0025] Such as Figure 6 Shown is a specific embodiment of a method for manufacturing an ultrasonic transducer provided by the present invention,

[0026] This embodiment is a convex array with a radius of curvature of R40mm. The ultrasonic transducer includes an aluminum block 14, two flexible circuit boards 7 or PCB circuit boards 7 pasted on the aluminum block 14, a backing 6, an electrode line 16, and a connection back The piezoelectric ceramic sheet 1 of the lining 6 and the acoustic matching layer 2 and the acoustic lens 11 connected to the piezoelectric ceramic sheet 1;

[0027] In order to achieve the above objective, the invention provides a method for manufacturing an ultrasonic transducer, which is characterized in that it includes the following steps:

[0028] Step 1: Cut the piezoelectric ceramic 1 into array elements, and the piezoelectric ceramic 1 is bent into a concave shape;

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Abstract

The invention provides a manufacturing method of an ultrasonic transducer so as to achieve the purpose, which is characterized by comprising the following steps: (1) cutting piezoelectric ceramics into array elements, and bending the piezoelectric ceramics into a concave shape; (2)respectively bonding two circuit boards on the right side and the reverse side of an aluminium block, and aligning one end of a circuit board circular arc to a central circular arc line of the concave of the piezoelectric ceramics, with both centers of circles superposed and both curvature radii differing by about 5 mm; (3) welding one end of an electrode wire on a welding pad at one end of the circuit board circular arc, and welding the other end of the electrode wire on a welding spot of an array element signal electrode surface of the piezoelectric ceramics; and (4) filling the concave space of the piezoelectric ceramics and the welded part of the electrode wire with an elastic polymer material mixture by a casting method, namely carrying out backing casting. The manufacturing method can greatly improve the fastness and the reliability of the welding spot and the shock resistance of the transducer, and has a very obvious effect on resisting expansion caused by heat and contraction caused by cold.

Description

technical field [0001] The invention relates to a manufacturing method of an ultrasonic transducer. Background technique [0002] Ultrasonic transducer is a device that can convert electrical signals into ultrasonic waves, and can convert ultrasonic reflection signals received from the human body or other detected objects into electrical signals. It is widely used in the field of medical ultrasonic diagnosis and field of ultrasonic nondestructive testing. Usually the structure of the ultrasonic transducer is as figure 1 As shown, it includes a piezoelectric ceramic 1', an acoustic matching layer 2', a backing 6', an acoustic lens 11' and a circuit board 15' with connectors. [0003] Commonly used array ultrasonic transducers include linear array and convex arc array. In the manufacturing process of array ultrasonic transducers, how to connect the electrodes of dozens or even hundreds of array elements of piezoelectric ceramics to the circuit board is the key One of the pr...

Claims

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Application Information

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IPC IPC(8): A61B8/00G01N29/24
Inventor 蔡耀明
Owner PHILIPS ULTRASOUND SHANGHAI CO LTD
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