JPS6240012B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Recently, ultrasonic tomography apparatuses, which are used as medical devices and can view tomographic images of the heart and abdomen in real time, have rapidly become popular. This is because it is non-invasive, has little risk, and provides a large amount of information despite its low price. Ultrasonic diagnostic methods include the pulse reflection method, the Doppler method, and the transmission method, but the pulse reflection method is currently in practical use and the mainstream of research. The principle of pulse reflection method is 1MHz to 10MHz from a vibrator (piezoelectric element).
The same transducer emits an ultrasonic pulse of about 300 degrees, receives echoes returned from the fields of two tissues (materials) with different acoustic impedances due to impedance mismatch, and uses the intensity to modulate the brightness of the oscilloscope. This displays the location of the echo. There are two types of diagnostic equipment: a mechanical scanning method and an electronic scanning method, but there is a tendency to standardize on the electronic scanning method, which provides a large amount of information.

In the case of the electronic scanning method, there are two types: one in which only one electrode of the vibrator is divided into m pieces, and one in which the vibrator is divided into m pieces, and the present invention relates to the latter case.

The present invention uses a flexible substrate which has a space in the center and has m copper foil sections alternately wired on both sides and is used instead of a lead wire from the vibrator electrode divided into m to the detector. After electrically connecting a vibrator with electrodes on both sides, bonding it to a backing material and dividing the vibrator into m sections, even if the cutting width is minute, electrical connection from the vibrator electrode to the detector can be made using a flexible board. This provides the advantage of making it possible.

In the conventional case, the electrical connection between the transducer electrode and the detector was made using a flexible board, but since the copper foil part was only exposed on one side, the insulation and mechanical strength of each copper foil part had to be considered. This resulted in the disadvantage that the interval between the copper foil parts became large, making it impossible to reduce the division width of the vibrator.

An embodiment of the present invention will be described using FIGS. 1 to 4. 1 is a vibrator having electrodes 2 and 3 on both sides. 4 is an electrode 2 on the lower surface of the vibrator 1 divided into m parts.
It is a flexible board having m copper foil parts 5 which serve as lead wires from the wire to the detector (not shown), and the central part is a space and the copper foil parts 5
are distributed alternately on both sides. In this space of the flexible substrate 4, both longitudinal ends of the electrode 2 of the vibrator 1 and the copper foil portion 5 of the flexible substrate 4 are placed.
The flexible substrate 4 is stacked so that the overlapping part is minimized, and then the flexible substrate 4
and the vibrator 1 are electrically connected. This is a backing material 6 that serves to absorb ultrasonic waves to the back side.
The vibrator 1 is divided into m parts. After the divided electrodes 2 of the vibrator 1 are divided, they are wired to the detector using the copper foil portion 5 of the flexible substrate 4.

In order to improve the performance of ultrasound diagnostic equipment and display clear images, it is necessary to make the division interval of the transducer of the ultrasound probe very small. With a flexible board that has lead wires on only one side, it was impossible to make the division width minute, considering the insulation and mechanical strength of the individual copper foil sections. However, in the present invention, a space is provided in the center of the flexible board, and copper foil parts are provided alternately on both sides. Since the copper foil that serves as the lead wire for the third vibrator is placed next to it, it has high insulation properties, and the dividing width of the vibrator can be made very small.Moreover, since it uses a flexible substrate, Since one side of the lead wire is an insulator, handling is charged, and the pattern shape of the copper foil can be designed arbitrarily, allowing the routing of the lead wire to be set freely, making it extremely valuable in practical use. be.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a vibrator according to the method of the present invention, Fig. 2 is a perspective view of the flexible substrate, Fig. 3 is a perspective view of the backing material, and Fig. 4 is an ultrasonic probe obtained by the method. It is a perspective view of a tentacle. DESCRIPTION OF SYMBOLS 1... Vibrator, 2, 3... Electrode, 4... Flexible board, 5... Copper foil part, 6... Backing material.

Claims (1)

[Claims] 1 There is a space in the center and copper foil parts are arranged alternately on both sides.
After electrically connecting the vibrator with electrodes on both sides to a flexible substrate used in place of the lead wire from the electrode of one side of the vibrator divided into m to the detector, the vibrator with electrodes on both sides is bonded to the backing material. A method for manufacturing an ultrasonic probe, characterized in that by dividing the transducer into m sections, electrical connection from the transducer electrode to the detector can be made using the flexible substrate even when the cutting width is minute.