JPS61260799A - Ultrasonic vibrator - Google Patents

Abstract

PURPOSE:To easily pick out an electrode from a piezoelectric elements group arranged in matrix by jointing and fixing the printed boards on which conductive parts are printed corresponding to the position of each piezoelectric element. CONSTITUTION:Common electrode 3 is installed on ultrasonic wave transmission/ reception surface of piezoelectric elements group 2 which is provided with plural number of piezoelectric elements 1, 1, and a printed board 4 is adhered to the reverse side by a conductive adhesive. On the first layer 5 on the surface of a printed board 4 is provided with conductive pads 7 which are positioned in correspondence with the position of each piezoelectric element, and the conductive pads 7 located at the peripheral part are connected with conductive wire parts which extend towards outside, while through holes 9 are made to the conductive pads 7 placed at inner location. Further, through holes 10 which is electrically connected with the through holes 9 and conductive wire parts 11 which are conductive with the through holes 10 are provided, and conductive wire part 11 and conductive wire part 8 from the electrode picking up part.

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention relates to an ultrasonic transducer used in an ultrasonic diagnostic device, an ultrasonic flaw detection device, etc. The present invention provides a novel method for taking out electrodes.

<Summary of the Invention> The present invention provides an ultrasonic transducer in which a plurality of piezoelectric bodies are arranged in a 7-trix shape, in which a conductor portion is arranged corresponding to the position of each piezoelectric body for this group of piezoelectric bodies. This makes it easy to take out the electrodes from the piezoelectric bodies arranged in a matrix.

<Background of the Invention> In a conventional ultrasonic transducer of this type, an i11 electrode is provided on one surface of each piezoelectric body arranged in a matrix, and a divided electrode is provided on the other surface, and a lead wire is connected to the surface of each divided electrode. The electrodes are connected by soldering or pounding, etc., and then the electrodes are taken out. However, in this method, when the number of piezoelectric bodies is large or when the area of the divided electrodes is small, it becomes difficult to take out the electrodes, resulting in poor working efficiency and low productivity.

<Object of the invention> This invention is intended to solve the above problems,
It is an object of the present invention to provide an ultrasonic transducer with a novel structure in which electrodes can be easily taken out from a group of piezoelectric bodies arranged in a matrix.

<Structure and Effects of the Invention> In order to achieve the above objectives, the present invention provides an ultrasonic transducer in which a plurality of piezoelectric bodies are arranged in a matrix. , a common electrode was provided, and a printed board having conductor portions arranged corresponding to the positions of the piezoelectric bodies was bonded and fixed to the opposite surface thereof.

According to this invention, even if the piezoelectric bodies are arranged in a matrix, the electrodes can be easily taken out by appropriately leading out the conductor portion of the printed board that comes into contact with each piezoelectric body. This invention achieves the remarkable effects of achieving the purpose of the invention, such as improving work efficiency and, in turn, improving the productivity of ultrasonic transducers.

<Description of Examples> FIG. 1 shows an ultrasonic transducer according to the present invention. The illustrated example includes a plurality of piezoelectric bodies 1゜1 arranged in a plurality of rows and columns (for example, 4 rows x 4 columns), and a common electric ellipse 3 is provided on the ultrasonic transmission/reception wave surface of the piezoelectric body group 2. On the opposite side of +I+i, print &4 was pasted with conductive adhesive.

The illustrated example print 4 has Jr. on the front and back sides. It is a two-layer FM +iff-2 on which a body pattern is formed, and the first layer 5 on the surface is provided with conductor panes 17 corresponding to each piezoelectric body position, as shown in FIG. An outer/extending conductor wire portion 8 is connected to the outer conductor pad 7,
In addition, a through hole 9 is provided on the inside (1° i position) Fj body pad 7.

The second layer [; on the front side of the printed board 4] is provided with a conductive pattern shown in FIG.
0 and 'l1ffl, and each conductor wire part 11 extends outward to form the conductor wire part 8 of the first layer 5.
Together with this, it constitutes an electrode extraction section.

Note that in 1-J, an example is shown in which the electrodes of the piezoelectric material group arranged in 4 rows x 4 columns were taken out on a printed board with a two-layer structure.
The present invention is not limited to this, and can be applied to take out electrodes from a group of piezoelectric bodies of any number and arrangement. In this case, the number of layers l of the printed board is 1 = n / 2, where the piezoelectric material group is arranged in m rows x n columns (where m > n) (where k is the piezoelectric material arrangement This increase in the number of conductor wires (the number of conductor wires that can be passed through the pitch) and the number of layers can be handled by stacking a large number of printed boards or by using a multilayer printed board.

By aligning the lower surfaces of the piezoelectric bodies 1 of the piezoelectric body group 2 on the conductor pads 7 on the first layer 5 of the printed board 4 and bonding them together with a conductive adhesive, a matrix arrangement is formed. The individual electrodes of the piezoelectric body group 2 can be taken out within the printed material 4.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the ultrasonic transducer according to the present invention, and FIG.
3 and 3 are diagrams showing the arrangement of conductors on a printed board. 1... Piezoelectric body 2... Piezoelectric group 3... Common electrode 4... Printed board 7... Conductor pad 8.11.・・・・・・
Conductor wire section 9.10...Through hole patent Applicant: Tachimen Electric Co., Ltd. Agent Patent attorney: Mitsuru Suzuki Yama

Claims (1)

[Scope of Claims] 1. An ultrasonic transducer in which a plurality of piezoelectric bodies are arranged in a matrix, wherein a common electrode is provided on the ultrasonic wave transmitting/receiving surface of the piezoelectric body group, and a common electrode is provided on the opposite surface thereof. An ultrasonic transducer made by bonding and fixing a printed board on which conductor parts are arranged corresponding to each piezoelectric body position. 2. The ultrasonic transducer according to claim 1, wherein the printed board is formed by stacking a plurality of layers.