JP2003197995A - Inductor, laminated inductor, electric circuit including the same, and method for manufacturing the inductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric circuit that has an excellent performance and can reduce manufacturing cost by providing such an element that can partly act for a function of circuit elements comprising an electric circuit. <P>SOLUTION: This inductor 1 comprises an ultrathin plate 2 and a film-like electrode 3 that is arranged in contact with the flat surface of the ultrathin plate 2, and it is also provided with a spiral electrode formed of a spiral electrode 5 whose one end is connected with a film-like electrode body 4, in at least one section of the film-like electrode 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a derivative having a spiral electrode, a laminated type derivative, a method for producing the derivative, and an electric circuit including the derivative. More specifically, the present invention relates to a piezoelectric ceramic having a film electrode partially containing a spiral electrode, a method for manufacturing the same, and an electric circuit including the piezoelectric ceramic.

[0002]

2. Description of the Related Art Electric and electronic devices are constructed by including at least one set of electric circuits in which electric circuit elements having desired functions are connected by conducting wires or the like. These electric circuit elements include a power supply that supplies a current to the electric circuit, a lamp that receives a current from the power source and outputs a specific operation from the electric circuit to the outside, a motor, a piezoelectric element, an electromagnet, a semiconductor element, etc. (hereinafter, these elements are operated. Elements), and elements such as resistors, capacitors, and coils that adjust the voltage and current according to the characteristics of the actuating elements (hereinafter these elements are referred to as adjustment elements).

Although these adjusting elements are indispensable elements for fulfilling the function of the electric circuit, the arrangement of the adjusting elements causes various problems. For example, if a resistor is used as the adjusting element, heat is generated, and sometimes an electric circuit is damaged. Further, if the adjusting elements are arranged in the electric circuit more than necessary, the manufacturing cost of the electric circuit is increased. Moreover, if the number of adjusting elements to be mounted increases, the size of the apparatus will increase.

[0004]

However, regarding these adjusting elements, although various proposals have been made in the past for improving the performance of the adjusting elements themselves, a proposal that is useful for improving the quality of the electric circuit as a whole and reducing the manufacturing cost. There is nothing, and it is the actual situation that even suggestions cannot be found.

For example, a flat plate-shaped dielectric (piezoelectric element, etc.)
When a device in which the film-like electrode is arranged in contact on the plane (1) (in this specification, such a device is referred to as a dielectric) is used as an actuator, a current limiting resistor is generally connected. If a structure in which a plurality of ultra-thin plate dielectrics are laminated is adopted to improve the performance as an actuator, the number of required resistors increases and the physical size of the circuit increases. In addition, since there are many resistors, problems such as heat generation become serious.

The present invention solves the drawbacks of the prior art and improves the quality and manufacturing cost of an electric circuit, and provides a derivative, a laminated type derivative, an electric circuit including the same, and a method for manufacturing the derivative. The purpose is to do.

[0007]

A derivative according to the present invention for achieving the above object is a derivative comprising a flat plate and a membrane electrode arranged in contact with the surface of the flat plate. On the surface on which the film electrode is arranged, a spiral electrode having one end connected to the film electrode is formed.

The laminated dielectric according to the present invention for achieving the above object is a laminated dielectric in which a plurality of flat plates and a plurality of film electrodes are laminated, and On the surface of the flat plate on which at least one of them is arranged, a spiral electrode having one end connected to the film electrode is formed.

Further, according to the present invention, there is provided an electric circuit including the above-mentioned derivative or laminated type derivative.

Further, according to another aspect of the present invention, there is provided a method for producing the above derivative. The method for producing the derivative is a method for producing a derivative including an ultrathin flat plate and a film electrode, wherein a conductive material is printed on the surface of the ultrathin plate to form the film electrode and one end thereof. Form a spiral electrode connected to the film electrode.

[0011]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

First, an outline of the embodiment will be described. In the present embodiment, as shown in FIG. 1, it is composed of an ultrathin plate (2) made of a piezoelectric ceramic and a film electrode (3) arranged in contact with either or both of the planes of the ultrathin plate (2). Derivative (1)
Is disclosed. In this derivative (1), at least a partial area of at least one film electrode is formed by a spiral electrode (5) (hereinafter, spiral electrode) whose one end is connected to the film electrode body (4). .

Although FIG. 1 shows one dielectric, it is a laminated dielectric in which a plurality of ultra-thin flat plates (2) are laminated with a film electrode (3) interposed therebetween. May be. At that time, the spiral electrode (5) may be arranged on all of the film electrodes used, or may be arranged on a part of the film electrodes. That is, the spiral electrode is arranged on at least one film-shaped electrode.

Further, in the laminated dielectric having a spiral electrode, spiral directions of spiral electrodes of a plurality of film electrodes are formed in a pair of right-handed and left-handed spirals, and the laminated derivative of two spiral electrodes of the pair. More preferably, the inner positions are arranged correspondingly, that is, facing each other in the direction perpendicular to the plane of the dielectric. It is preferable to use a ceramic plate having piezoelectricity as the electrode flat plate (1), but it is also possible to use other dielectrics.

The electric circuit containing the derivative having the spiral electrode as described above substitutes for at least a part of the function of the adjusting element used as an essential element of the electric circuit, and therefore the quality and the manufacturing cost are improved. It has been done.

Further, the present embodiment discloses a method for producing a derivative in which a film electrode having such a spiral electrode is arranged. In the manufacturing method of the present embodiment, a film electrode having a spiral electrode is formed by printing on the plane of an ultrathin plate.

The inventor of the present invention has earnestly studied a derivative having a spiral electrode, and as a result, by arranging the spiral electrode on a part of the electrode of the derivative, a reluctance effect (hereinafter referred to as an L effect), that is, an electrode is applied. It was found that the effect of making the alternating current difficult to flow is exhibited. Therefore, in the electrode circuit containing the derivative having the spiral electrode according to the present embodiment, the L effect of the derivative can reduce the number of resistance elements used in the electric circuit. As a result, it is possible to prevent heat generation due to the resistance element in the electric circuit, and it is possible to reduce the manufacturing cost by reducing the usage amount of the resistance element.

The derivative, the electric circuit, and the method for producing the derivative according to the embodiment will be described in more detail below. Figure 1
It is a figure which shows an example of the derivative | guide_body which has the spiral electrode by this embodiment, and is a piezoelectric ceramic which has arrange | positioned the film-shaped electrode to the piezoelectric ceramic of an ultrathin flat plate in this embodiment.

In the piezoelectric ceramic 1 shown in FIG. 1, a film electrode 3 is adhered to one surface (upper surface) of an ultrathin flat plate 2 made of ceramic, and one end of the film electrode 3 extends from a film electrode body 4. The spiral electrode 5 is arranged.

Since the spiral electrode 5 is formed as a part of the film electrode 3, the reluctance effect (L effect) is exhibited in this part. The spiral electrode may have any shape as long as long and narrow conductive materials are continuously arranged in a single plane in a spiral shape, and in many cases, a circular spiral shape is adopted. However, a polygonal spiral such as a triangle or a quadrangle may be adopted if necessary. Number of swirls,
The thickness of the conductive material used, the size of the spiral portion, the arrangement position, etc. may be determined according to the properties required of the product used.

In order to connect and arrange the spiral electrode to the film-like electrode body, a conductive material is printed on the ultrathin flat plate 2 (a known method of exposure, development and etching, or a method of silk printing). ) Is preferable.
However, for example, after arranging the membrane electrode body 4 on the ultrathin flat plate 2,
Alternatively, a spiral electrode may be separately formed on the film electrode, and the spiral electrode and the film electrode body may be connected to each other.

The derivative having the spiral electrode according to this embodiment can also be applied to a laminated type derivative. The laminated type dielectric is a combination of an ultrathin plate and a film electrode laminated in a plurality of layers according to the purpose, and is suitable for use as an actuator. The number of layers to be stacked may be selected according to the purpose, and currently there are some from 4, 5 to 20 or more. A spiral electrode is provided on at least one of the film electrodes in the plurality of dielectric films, but the spiral electrode may be connected to all the film electrodes.

When a spiral electrode is provided for a plurality of film electrodes, the spiral electrodes may be symmetrically arranged and used as a pair as shown in FIGS. 2 to 5 (direction of spiral ( Spiral direction) may be used in the opposite direction). FIG. 2 shows the fifth piezoelectric ceramic 11a of the laminated piezoelectric ceramics.
2A is a plan view, and FIG. 2B is an enlarged view of a broken line circle portion of FIG. 2A. Further, FIG. 3 shows the ninth piezoelectric ceramic 11b, and both FIG. 3A and FIG. 3B are the same drawings as FIG.

Similarly, FIG. 4 shows a laminated piezoelectric ceramic 13
The piezoelectric ceramic 11c used for the
2A and 2B are the same drawings as FIGS. 2A and 2B. Further, similarly, FIG. 5 shows one of the laminated piezoelectric ceramics.
It is the seventh piezoelectric ceramic 11d, and both FIGS. 5A and 5B are the same drawings as FIGS. 2A and 2B.

As can be seen by comparing FIG. 2 and FIG.
In the piezoelectric ceramics 11a and 11b shown in FIG. 3, the spiral electrodes 15a and 15b are both arranged at the upper left corner of the film-shaped electrode bodies 14a and 14b as shown in FIGS. 2 (A) and 3 (A). Therefore, when these are stacked, the spiral electrodes 15a and 15b are arranged at corresponding positions in the direction perpendicular to the plane of the piezoelectric ceramic. In the piezoelectric ceramic 11a arranged in the fifth position, the spiral direction is left-handed as indicated by 15a in FIG. 2 (B), whereas in the piezoelectric ceramic 11b arranged in the ninth position, as shown in FIG. 3 (B). As shown by 15b, it is right-handed.

On the other hand, as can be seen by comparing FIGS. 4 and 5, in the piezoelectric ceramics 11c and 11d, the spiral electrodes 15c and 15d have the film-shaped electrode body 14c as shown in FIGS. 4 (A) and 4 (B). It is located in the lower left corner of 14d. Therefore, when these are stacked, the electrode 15c,
15d will be arranged at a corresponding position in the direction perpendicular to the plane of the piezoelectric ceramic. And in the 13th voltage ceramic 11c arranged, the spiral direction is left-handed as shown by 15c in FIG.
In the 17th piezoelectric ceramic 11d, as shown in FIG.
As shown in (B), it is right-handed.

As described above, it is preferable that the spiral directions of the spiral electrodes of the thin film electrodes, which are arranged in pairs at a distance, are symmetrically arranged in opposite directions because the reluctance effect is further promoted.

6 and 7 show model comparisons of the present invention and the conventional electric circuit. FIG. 6 shows an electric circuit 6 including a dielectric having a spiral electrode (piezoceramic in this case) of the present embodiment, and FIG. 7 shows an electric diagram 6a including a conventional piezoelectric ceramic. As described above, the use of the derivative having the spiral electrode has the L effect, so that the number of resistance elements can be reduced. In the conventional example shown in FIG. 7, the resistance elements 8a and 8b are used, but in the case of this embodiment, an electric circuit can be formed only by the resistance element 8. In the figure, 7 is an alternating current and 9 is a coil.

In this way, the circuit element can be omitted,
In the case where a plurality of ceramic flat plates are laminated to form an actuator as described above, the amount that can be omitted is increased, so that the effect becomes more remarkable.

[0030]

As described above, according to the present invention,
Due to the L effect of the spiral electrode, it is possible to reduce the number of related components in the electric circuit, and as a result, it is possible to eliminate problems such as heat generation of the electric circuit, achieve quality improvement, and reduce manufacturing cost. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a derivative having a spiral electrode of the present invention.

FIG. 2 shows a laminated piezoelectric ceramic according to one embodiment of the present invention.
It is a figure which shows the shape of the 5th piezoelectric ceramic, and is FIG.
2A is a plan view, and FIG. 2B is an enlarged view of a portion indicated by a broken line view in FIG. 2A.

FIG. 3 is a view similar to FIG. 2 showing a shape of a ninth piezoelectric ceramic of a laminated piezoelectric ceramic, FIG. 3 (A) is a plan view and FIG. 3 (B) is an enlarged view.

4 is a view similar to FIG. 2 showing the shape of a thirteenth piezoelectric ceramic of a laminated piezoelectric ceramic, and FIG.
Is a plan view, and FIG. 4B is an enlarged view.

5 is a view similar to FIG. 2 showing the shape of the 17th piezoelectric ceramic of the laminated piezoelectric ceramic, and FIG.
Is a plan view, and FIG. 5B is an enlarged view.

FIG. 6 is a diagram showing an example of an electric circuit including a dielectric according to the present embodiment.

FIG. 7 is a diagram showing an example of an electric circuit including a general dielectric.

[Explanation of symbols]

1 ... derivative (piezoelectric element) 2 ... Ultra thin flat plate 3 ... Membrane electrode 4 ... Membrane electrode body 5 ... spiral electrode 6 ... electric circuit

Claims (10)

[Claims] 1. A dielectric comprising a flat plate and a film electrode arranged in contact with the surface of the flat plate, wherein one end of the film is formed on the surface of the flat plate on which the film electrode is arranged. A spiral electrode is formed so as to be connected to the electrode. 2. The derivative according to claim 1, wherein the flat plate is an extremely thin ceramic flat plate having piezoelectricity. 3. The derivative according to claim 1, wherein a part of the film electrode is formed as the spiral electrode. 4. An electric circuit comprising the derivative according to any one of claims 1 to 3. 5. A laminate type dielectric in which a plurality of flat plates and a plurality of film electrodes are stacked, wherein at least one of the plurality of film electrodes is arranged on the surface of the flat plate. A laminated-type dielectric material, characterized in that a spiral electrode having one end thereof connected to the film electrode is formed. 6. The laminated dielectric is connected to each of a pair of film electrodes of the plurality of film electrodes, and is disposed at a position facing each other with one or a plurality of the flat plates sandwiched therebetween. 6. The laminated derivative according to claim 5, comprising a pair of spiral electrodes, wherein one spiral direction is clockwise and the other spiral direction is counterclockwise. 7. The laminated derivative according to claim 4, wherein the flat plate is an ultrathin ceramic flat plate having piezoelectricity. 8. The laminated derivative according to claim 5, wherein a part of the film electrode is formed as the spiral electrode. 9. An electric circuit comprising the laminated derivative according to claim 5. Description: 10. A method for producing a derivative including an ultrathin flat plate and a film electrode, wherein a conductive material is printed on the surface of the ultrathin plate so that the film electrode and one end thereof are made of the film. And a spiral electrode connected to the spiral electrode, the method for producing a derivative having a spiral electrode.