JPH06251945A - Laminated element - Google Patents

Abstract

PURPOSE:To miniaturize parts and to improve workability and electric characteristics by a method wherein a plurality of the second insulating sheets, which are partially provided and cover the parts coming into contact with the first and the second conductor and partially provided avoiding the bending part, are provided. CONSTITUTION:Insulating sheets 10, which are alternately folded in opposite direction alternately, inductor conductors 20, which form an inductor and a capacitor when the above-mentioned insulating sheets 10 are folded, and capacitor inductors are arranged. Besides, a plurality of insulating sheets 40 and 42, with which the partial connection by overlapping of the above-mentioned conductors 20 or the capacitor conductors 30 can be prevented, are provided. The insulating sheets 40 and 42 have the minimum area required for insulation, and a laminated body is formed in the state wherein the insulating sheets 40 are pinched between the inductor conductors, and the insulating sheets between the capacitor inductors 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated element, and more particularly to a laminated element in which an inductor and a capacitor exist in a distributed constant in a laminated body in which insulating sheets are laminated.

[0002]

2. Description of the Related Art With the development of electronic technology in recent years, electronic circuits have been widely used in various fields. Therefore, it is possible to operate these electronic circuits in a stable and reliable manner without being affected by the outside. desired.

However, noise enters the electronic circuit directly or indirectly from the outside. For this reason,
There is a problem that various electronic devices using electronic circuits often cause malfunctions.

In particular, electronic circuits often use a switching regulator as a DC power source. Therefore, a large amount of noise having various frequency components is often generated in the power supply line of the switching regulator due to a transient current such as switching or due to a load variation caused by the switching operation of the digital IC used. Then, these noises are propagated to other circuits in the same device through the power supply line or by radiation, and have an adverse effect such as malfunction or reduction in S / N ratio, and other electronic devices that are being used nearer May cause malfunction of.

In order to remove such noise, various noise filters are generally used in electronic circuits.
In particular, in recent years, various high-performance electronic devices have been used, and regulations on noise are becoming more and more stringent. As a result, a small yet high-performance noise filter that can reliably remove generated noise is provided. Development of a functional LC element is desired.

As one of such LC elements, a laminated element in which the L component and the C component exist in a distributed constant is known. 22 is an external perspective view of this laminated element, and FIG. 23 is a diagram showing a state in which the insulating sheet is folded in the manufacturing process of the laminated element. Further, FIG. 24 is a diagram showing a positional relationship between two conductors formed on both surfaces of the insulating sheet.

In these figures, the conductor 102 becomes an inductor having a predetermined number of turns when the insulating sheet 100 is folded. In addition, the conductor 104 is for forming a capacitor, and forms a capacitor between the conductor 104 and the conductor 102 that faces when the insulating sheet 100 is folded.

In this way, the inductance L formed by the conductor 102 and the capacitance C formed by the conductor 104 form a distributed constant circuit, and a good L is obtained.
It can function as a C noise filter.

[0009]

However, in the above-mentioned conventional laminated type element, the conductors 102 are provided on both sides of the insulating sheet 100.
Since the insulating sheet is folded after forming the electrodes 104 and 104, it is necessary to insulate the conductors 102 or the conductors 104 adjacent to each other with the folded portion on the valley side interposed therebetween so as not to make electrical contact with each other. That is, the conductor 102,
It is necessary to add second and third insulating sheets to the outside of each of the 104 and fold the insulating sheet 100 together with these added insulating sheets.

As a result, the thickness of the laminated element shown in FIG. 22 increases, which makes it difficult to reduce the size of the component.

The second and third insulating sheets 10 are also provided.
Since it is necessary to simultaneously bend 6 and 108 in each folded portion of the insulating sheet 100, the conductors 102 and 104
When the sheet is folded, springback occurs due to the insulating sheets 100, 106 and 108, which makes it difficult to process. In particular, when such a spring is generated when manufacturing a laminated element on an automated manufacturing line, it becomes difficult to position the element in a manufacturing apparatus, which causes a problem that the manufacturing line cannot be substantially automated.

Further, paying attention to each folded portion, the conductor 102 or 104 existing on the outer peripheral side is bent with a large radius of curvature, so that an excessive stress is applied to the outer conductor and cracks are likely to occur. There was a problem. If cracks occur, it may cause wire breakage and bias in characteristics,
The failure rate of the LC element will increase.

Further, as the number of insulating sheets to be folded increases, the capacitance C decreases correspondingly, so that there is a problem that good characteristics cannot be obtained.

The present invention has been made in view of such conventional problems, and an object thereof is to make it possible to reduce the size of parts and to improve the workability and the electrical characteristics. To provide.

[0015]

In order to solve the above-mentioned problems, the laminated element of the present invention comprises a first insulating sheet having a plurality of folding portions which are alternately folded in the opposite direction and laminated. A first conductor provided on one side of each of the folded portions of the first insulating sheet so as to form an inductor with a predetermined number of turns when the folded portions are alternately folded in the opposite direction and laminated; A second conductor, which is provided on the other surface side of each folded portion of the insulating sheet so as to substantially face the first conductor and forms a capacitor between the first conductor and the first conductor; A plurality of second insulating sheets that cover a portion where the first and second conductors are in contact with each other when the second conductor is folded and that are partially provided so as not to reach the bent portion. It is characterized by being provided.

Further, the laminated element of the present invention has a first insulating sheet having a plurality of folding portions which are alternately folded in the opposite direction and laminated, and a first insulating sheet on one side of each folding portion. A first conductor provided so as to form an inductor having a predetermined number of turns when the folding parts are alternately folded in the opposite direction and stacked, and the first conductor is formed when the first conductor is folded. And a plurality of second insulating sheets that are provided partially so as not to cover the bent portions.

[0017]

In the laminated element of the present invention, a plurality of folds forming the first insulating sheet are alternately folded in opposite directions to form a laminated body, whereby the folds provided on one side of each fold One conductor forms an inductor with a predetermined number of turns. The second insulating sheet is for preventing the first conductors having different potentials from electrically contacting each other when the first conductor is folded to form the inductor in this way. It suffices to have a minimum area capable of covering only the contact portion of one conductor. Each of such a plurality of second insulating sheets,
Insulation is performed by sandwiching the first conductor in a portion where the first conductors are in contact with each other.

Further, the second conductor provided on the other surface side of each folded portion of the first insulating sheet so as to be substantially opposed to the first conductor forms a capacitor between the second conductor and the first conductor. To do. Even when the second conductor is folded to form a capacitor, the second conductors having different potentials may be in electrical contact with each other. I do.

In this way, the first conductors or the second conductors
By insulating only the contact portions of the conductors of the above with the second insulating sheet, a laminated element in which the inductor of the first conductor and the capacitor of the second conductor exist in a distributed constant is formed, and the multilayer element is spread over a wide band. Good damping characteristics can be obtained.

In the present invention, the contact between the conductors is partially insulated by the second insulating sheet, so that the area of the second insulating sheet can be reduced as compared with the case where the entire surface of the conductor is insulated. It is possible to reduce the size of parts.

Further, since it is not necessary to have an insulating sheet to be laminated together to insulate the second and third conductors from each other, the occurrence of springback can be suppressed as compared with the case where these insulating sheets are simultaneously bent and folded. It is possible to improve workability.

Further, by thinning the insulating layer interposed between the first conductors or the second conductors, the electrical characteristics can be improved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a laminated type element to which the present invention is applied will be specifically described below with reference to the drawings.

First Embodiment FIG. 1 is an exploded view of the laminated element of the present embodiment for each component, and shows the state of folding when manufacturing the laminated element by folding each component. ing. Also, FIG.
[Fig. 6] is an explanatory diagram showing a positional relationship of each component, and shows an engagement state when the respective components are stacked.

As shown in FIGS. 1 and 2, the laminated element of this embodiment has an insulating sheet 1 which is alternately folded in opposite directions.
0, the inductor conductor 20 and the capacitor conductor 30 arranged on both sides of the insulating sheet 10, the insulating sheet 40 sandwiched between the folded inductor conductors 20, and the insulating sheet 42 sandwiched between the folded capacitor conductors 30. It is configured to include and.

The insulating sheet 10 is formed by arranging a plurality of folding portions 12 which are folded and laminated in series through a folding portion 14. Perforations are formed in advance in each of the bent portions 14 in order to facilitate the bending.

The inductor conductor 20 is formed on one surface side (the upper side in FIG. 1) of the insulating sheet 10 so as to form a coil when the insulating sheet 10 is folded.
Focusing on each folded portion 12 of the insulating sheet 10, the inductor conductor 20 is formed so that each conductor has a U-shape or an L-shape, and each of the U-shape and L-shape conductors is formed. The inductors are arranged and connected alternately, and when they are alternately folded in the opposite direction, they form an inductor as a whole.

The capacitor conductor 30 is formed on the other surface side (lower side in FIG. 1) of the insulating sheet 10 so as to form a capacitor with the inductor conductor 20 when the insulating sheet 10 is folded. There is. This capacitor conductor 30 is similar to the inductor conductor 20 in the insulating sheet 1.
Focusing on each folded portion 12 of 0, each conductor is formed to have a U-shape or an L-shape, and the U-shape and L-shape conductors are alternately arranged and connected, When alternately folded in the opposite direction, the coil is constructed as a whole.

Further, the capacitor conductor 30 needs to face the inductor conductor 20 so as to have a capacitance component with the inductor conductor 20. In this embodiment, the U-shaped portion of the capacitor conductor 30 faces the L-shaped portion of the inductor conductor 20, and the L-shaped portion of the capacitor conductor 30 faces the U-shaped portion of the inductor conductor 20. And, the mutually overlapping portions have a capacitance component.

The insulating sheet 40 prevents the adjacent U-shaped portion and L-shaped portion from partially contacting each other when the inductor conductor 20 is folded. In this embodiment, four insulating sheets 40 are provided so as to be sandwiched between the contact portions. This insulation sheet 40
Is the insulating sheet 10 as shown in FIGS.
Is bent on both sides of the respective bent portions 14 on the valley side (the valley side when viewed from the upper side in FIG. 1, and the bent portion 14 with “V” in FIG. 2 is the valley side). It is sandwiched between the inductor conductors 20 that are in contact with each other, and may have a slightly larger area than the contact portion between the inductor conductors 20.

Similarly, the insulating sheet 42 prevents the adjacent U-shaped portion and L-shaped portion from partially contacting each other when the capacitor conductor 30 is folded. In this embodiment, four insulating sheets 42 are provided so as to be sandwiched between the contact portions. Like the insulating sheet 40, the insulating sheet 42 also includes the capacitor conductor 3
The area may be slightly larger than the contact area between 0s.

The insulating sheets 40 and 42 cover the contacting portions (contacting portions having different potentials) between the inductor conductors 20 or the capacitor conductors 30 and do not cover the bent portions 14 of the insulating sheet 10. Although it is necessary, the size may be substantially the same as that of each surface of each folded portion 12 of the insulating sheet 10 in addition to the case where the contact portion is made slightly wider as described above.

When manufacturing the laminated element of this embodiment, first, the inductor conductor 20 is formed on one surface of the insulating sheet 10 and the capacitor conductor 30 is formed on the other surface. For example, the inductor conductor 20 and the capacitor conductor 3
0 can be formed by coating on each surface of the insulating sheet 10 by various methods such as printing, etching and plating.
It can be formed by an arbitrary method, such as attaching the patterned conductive plate shown in FIGS. 1 and 2 onto the insulating sheet 10.

FIG. 2 (a) shows the positional relationship of the inductor conductor 20 to be formed with the insulating sheet 10 from the inductor conductor 20 side.
The state where the inductor conductor 20 and the insulating sheet 10 are seen is shown. In addition, in FIG.
The positional relationship of 0 with respect to the insulating sheet 10 is shown,
The state where the capacitor conductor 30 and the insulating sheet 42 are seen from the insulating sheet 10 side is shown.

Next, the insulating sheet 40 is partially attached to the surface of the inductor conductor 20. Although the insulating sheet 40 is attached at the position shown in FIG. 2A, an insulating layer may be formed on the surface of the inductor conductor 20 by a method such as thin film molding.

Similarly, the insulating sheet 42 is partially attached to the surface of the capacitor conductor 30. The insulating sheet 42 is attached at the position shown in FIG. 2B, but the insulating layer may be formed on the surface of the capacitor conductor 30 by a method such as thin film molding, similarly to the insulating sheet 40. Is.

Next, the insulating sheet 10 having the inductor conductor 20, the capacitor conductor 30, and the insulating sheets 40 and 42 formed on both sides thereof is bent in a zigzag shape through the bending portion 14 as shown in FIG. 12 are stacked (in FIG. 1, the constituent parts are shown separately so that the engagement relationship between the constituent parts is clear).

By folding the insulating sheet 10 in this manner, the inductor conductor 20 forms a coil having 4.5 turns and each winding is insulated by the insulating sheet 40, and has an inductance L. It will function as an inductor. At the same time, the capacitor conductor 30 faces the inductor conductor 20 with the insulating sheet 10 in between, and forms a capacitance C therebetween.

Next, terminals are formed from the laminated body thus folded.

FIG. 3 is an explanatory view of the case where terminals are taken out from the laminated body after being folded. FIG. 1A is a perspective view of the laminated body with the direction of arrow B in FIG. 1 facing upward, and shows the input / output lead 2 connected to one end of the inductor conductor 20.
It is shown that 6 is exposed at the uppermost end of the stack. In FIG. 3B, the capacitor conductor 30 is obtained by performing a process such as burning off the end portion of the insulating sheet 10 with a laser.
The state is shown in which the grounding lead 36 connected to one end is exposed. 3C is a perspective view of the laminated body with the direction of arrow C in FIG. 1 facing upward, and shows the input / output lead 28 connected to the other end of the inductor conductor 20.
Is exposed on the opposite end of the stack.

FIG. 3D shows each lead 2 in this way.
Surface treatment is applied to the laminated body in which 6, 28, 36 are exposed, and input / output terminals 26a, 28a electrically connected to the leads 26, 28, 36 and a ground terminal 3 on the surface thereof.
6a is formed. By mounting the terminals in this way, it is possible to realize a small SMD (Surface Mount Device) type stacked element, which is extremely effective in assembling a circuit which has been increasingly automated in recent years.

The laminated element of the present embodiment has each terminal 2
Not only may 6a, 28a, and 36a be directly soldered to the circuit board, but each of these terminals may be formed into a pin structure for connection, if necessary.

FIG. 4 is a diagram showing an equivalent circuit of the laminated element of this embodiment shown in FIGS. As shown in FIG. 4, the laminated element of the present embodiment includes an inductor formed by the inductor conductor 20 and the inductor conductor 20.
, And a capacitor formed by the capacitor conductor 30 between them, and these inductors and capacitors appear as distributed constants, and exhibit excellent damping characteristics not found in lumped constant filters.

As described above, in the laminated element of this embodiment, the insulation between the inductor conductors 20 or the insulation between the capacitor conductors 30 is performed by the insulation sheets 40 and 42 which cover only the contact portions so as to occupy the minimum necessary area. Therefore, when the insulating sheet 10 is folded, the thickness of the entire laminated element becomes thin, and the parts can be downsized. For example, in the conventional case, the insulating sheet is folded back so as to face the entire surface of the inductor conductor 20 or the capacitor conductor 30, but in the present embodiment, each folded portion 1 of the insulating sheet 10 is folded.
Since the size is a part of 2, and only one insulating sheet is required without folding back, it is possible to considerably reduce the thickness of the laminated element as a whole. Further, since the minimum amount of insulating sheet may be used, there is an effect that the material cost can be reduced.

Further, in the present embodiment, the other second and third insulating sheets are not bent together at each bent portion 14 of the insulating sheet 10, so that the occurrence of springback can be suppressed in the stacking step. . In addition, since the outer diameter of each bent portion 14 is reduced due to the absence of the second and third insulating sheets, excessive stress is not applied to the inductor conductor 20 or the capacitor conductor 30, which is the outer side when bending, There is no cracking in each of these conductors. Therefore, it is possible to prevent the disconnection due to the cracks, the deviation of the characteristics, and the increase in the defective rate of the laminated element due to the deviation.

In addition, in this embodiment, the inductor conductor 20 is used.
Also, since the number of insulating sheets interposed between the capacitor conductors 30 is smaller than that of the conventional element, there is an effect that the value of the capacitance component can be increased, and good electrical characteristics can be obtained. .

[Modification of First Embodiment] FIG. 5 is a laminated LC in which the occurrence of springback is suppressed and the insulating sheet 10 is easily bent by further improving the above-described laminated element of the first embodiment. It is a figure which shows the structure of an element.

This drawing corresponds to FIG. 2 described above. Instead of the inductor conductor 20 of FIG. 2 (a), a partial groove 22 is formed in the vicinity of the center of each bent portion which becomes a valley at the time of bending. The feature is that the inductor conductor 20a is used. Similarly, the capacitor conductor 30 of FIG.
Instead of, the capacitor conductor 30a having a partial groove 32 near the center of each bent portion which becomes a valley when bent
It is characterized by using.

When manufacturing the laminated element having such a structure, the inductor conductor 20 is formed on both surfaces of the insulating sheet 10.
a, the capacitor conductor 30a, and the insulating sheets 40 and 42 are coated and formed, the insulating sheet 10 is then bent.
It is bent in zigzag shape through 4 to form a laminated body.

When the insulating sheet 10 is bent, grooves 22 and 32 are formed in the bent portions of the inductor conductor 20a and the capacitor conductor 30a. All that is required is to fold the insulating sheet 10 of. That is, it is not necessary to bend the inductor conductor 20a or the capacitor conductor 30a at the same time, and the insulating sheet 10 is easier to bend than in the laminated element having the structure shown in FIG.

FIG. 6 is a diagram showing the structure of the laminated device in which the laminated device of the first embodiment is further improved to improve the electrical characteristics and the thickness of the laminated body is made uniform.

2A corresponds to FIG. 2A, and four dummy conductors 44 are formed on the same plane as the inductor conductor 20 so as to fill the gap between the inductor conductors 20.
It is characterized by the provision of. Similarly, FIG.
It corresponds to (b) and is characterized in that four dummy conductors 46 are provided on the same surface as the capacitor conductors 30 so as to fill the gaps between the capacitor conductors.

When manufacturing the laminated element having such a structure, the inductor conductor 20 and the four dummy conductors 44 are formed on one surface of the insulating sheet 10, and the capacitor is formed on the other surface of the insulating sheet 10. The conductor 30 and the four dummy conductors 46 are formed. Next, four insulating sheets 40 and 42 are formed on both surfaces of the insulating sheet 10 by coating, and then the insulating sheet 10 is bent in zigzag through the bending portion 14 to form a laminated body.

In this laminated element, the dummy conductor 44 fills the gap between the inductor conductors 20 and the dummy conductor 46 fills the gap between the capacitor conductors 30. Therefore, when the insulating sheet 10 is bent to form a laminated body, the laminated body has a uniform thickness, and post-processing such as terminal attachment and wiring processing is facilitated.

In particular, when stacking the dummy conductors 44 and 46 so as to face the inductor conductor 20 or the capacitor conductor 30 with the valleys or peaks of the insulating sheet 10 interposed therebetween,
The opposing dummy conductor 44 and inductor conductor 20, and the dummy conductor 46 and capacitor conductor 30 are respectively soldered, and the thickness of the insulating sheets 40 and 42 is almost the same as the thickness of this solder layer (for example, about 10 μm). By this, the thickness of the laminate can be adjusted to be completely uniform.

FIGS. 7 and 8 are views showing the structure of a laminated element having the features (grooves) of FIG. 5 and the features (dummy conductor) of FIG. 6 described above. FIG. 7 shows a state in which the laminated element is developed for each component, and FIG. 8 shows the positional relationship of each component.

This laminated element is composed of the inductor conductor 20a.
And the grooves 22, 32 in the folded portion of the capacitor conductor 30a.
Therefore, it is easy to fold when forming the laminated body, and springback hardly occurs. Also,
Since the dummy conductor 44 is provided so as to fill the gap between the inductor conductors 20a and the dummy conductor 46 is provided so as to fill the gap between the capacitor conductors 30a, the thickness of the laminated body can be made completely uniform. .

FIG. 9 shows an inductor conductor 20 and a capacitor conductor 30 for the laminated element of the first embodiment described above.
It is a figure which shows the structure of the laminated element which changed the conductor pattern of FIG.

FIG. 9A shows the engagement relationship between the inductor conductor 20b and the insulating sheets 10 and 40 after the pattern change, and FIG. 11B shows the capacitor conductor 30b and the insulating sheet 10 and 40 after the pattern change. 42 shows the engagement relationship with 42. Inductor conductor 20b, capacitor conductor 30b
Is the inductor conductor 20 and the capacitor conductor 3 described above.
It has a shape in which a part of 0 is deleted, the capacitance C is reduced by the amount of reduction of the facing area, and a laminated element having slightly different frequency characteristics is formed. Therefore, when the capacitance C may be small, the stacked element shown in FIG. 9 may be used, and conversely, when the capacitance C is desired to be increased, the stacked element shown in FIGS. 1 to 8 may be used.

The pattern shapes of the inductor conductor and the capacitor conductor are not limited to the shapes described so far, and may be any shapes as long as they function as an inductor and a capacitor when a laminated body is formed. For example, each of these conductors may have a gradually increasing or decreasing radius.

Second Embodiment Next, the laminated element of the second embodiment will be described.

A feature of the laminated element of this embodiment is that the capacitor conductor is made to face a part of the inductor conductor, and the laminated element of the above-mentioned first embodiment (particularly in FIG. 7).
And a laminated element shown in FIG. 8) as a noise filter having a frequency characteristic different from that of the laminated element shown in FIG.

FIG. 10 is a diagram in which the laminated element of the present embodiment is developed for each component, and shows a state in which each component is folded to manufacture the laminated element. In addition, FIG.
[Fig. 3] is an explanatory view showing the positional relationship of the respective component parts, and shows the engagement relationship when the respective component parts are stacked.

As shown in FIG. 10 and FIG. 11, the laminated element of this embodiment comprises an insulating sheet 10 which is alternately folded in the opposite direction, an inductor conductor 20a and a capacitor conductor arranged on both sides of the insulating sheet 10. 30c and insulating sheets 40 and 42 sandwiched between the inductor conductor 20a and the capacitor conductor 30c.

Among them, the capacitor conductor 30c partially faces the inductor conductor 20a, forms a coil of 2.5 turns, and forms a capacitor with the inductor conductor 20a. Therefore, as compared to the case where the inductor conductor and the capacitor conductor are opposed to each other in the entire range as in the above-described laminated element of the first embodiment, the capacitance C is reduced and the frequency characteristics are different. FIG. 12 is a diagram showing an equivalent circuit of the laminated element of the present embodiment, in which the capacitor conductor 30c is the inductor conductor 20.
Since it partially faces a, the capacitor is formed only in this facing portion.

The inductor conductor 2 is formed by the insulating sheet 40.
0a is insulated from each other in the same manner as in the laminated element shown in FIG.
The insulation of 0c may be performed only when necessary. That is,
As shown in the present embodiment, the capacitor conductor 30c is set to 2.
If the number of turns is 5, the two insulating sheets 42 are required. However, if the number of capacitor conductors 30c is less than 1.5, the capacitor conductors 30c may not be in electrical contact with each other. Insulating sheet 42 is not required for this.

In addition, in the laminated element of this embodiment, it is possible to reduce the size of the component due to the reduced overall thickness, and the conductor cracks due to the fact that the second and third insulating sheets are not bent together. In the first embodiment described above, it is possible to prevent wire breakage and disconnection, reduce the defect rate, and increase the value of the capacitance component due to the proximity of the inductor conductor and the capacitor conductor to obtain good electrical characteristics. This is the same as the laminated element of the example.

Although the inductor conductor 20a and the capacitor conductor 30c have the grooves 22 and 32 and the dummy conductors 44 and 46 are added in FIGS. 10 and 11, the laminated element is shown. , 32, the dummy conductors 44, 46 are not provided, and other conductor patterns are changed. Various modifications are conceivable as in the first embodiment.

Third Embodiment Next, the laminated element of the third embodiment will be described.

A feature of the laminated element of this embodiment is that input / output terminals are provided at both ends of the capacitor conductor. That is, the laminated elements of the first and second embodiments are different from each other in that they are of the normal mode, whereas the laminated elements of this embodiment are of the common mode.

FIG. 13 is a diagram in which the laminated element of the present embodiment is developed for each component, and shows a state in which each component is folded to manufacture the laminated element. In addition, FIG.
[Fig. 3] is an explanatory view showing the positional relationship of the respective component parts, and shows the engagement relationship when the respective component parts are stacked.

The laminated element shown in FIGS. 13 and 14 corresponds to the laminated element shown in FIGS. 7 and 8.
The capacitor conductor 30d has the input / output terminals 37 and 3 at both ends thereof.
8 is different.

That is, the inductor conductor 20a and the capacitor conductor 30d function as inductors for the inductances L1 and L2, respectively, and both conductors 20a and 20d.
A capacitor having a capacitance C is formed between a and 30d. FIG. 15 is a diagram showing an equivalent circuit of the laminated element of this example.

In the laminated element of this example,
The insulating sheet 40, 42 partially insulates the inductor conductor 20a and the capacitor conductor 30d from each other, which is similar to the above-described first embodiment and the like, and various effects such as miniaturization and improvement of electric characteristics and various modifications. The aspect can be considered in the same manner as in the first embodiment and the like.

Fourth Embodiment Next, a laminated element of the fourth embodiment will be described.

The feature of the laminated element of this embodiment is that the inductor conductor and the capacitor conductor are divided into a plurality of parts along the folded portions that serve as the valleys of the insulating sheet 10. Since it does not exist, the occurrence of springback is almost eliminated and the workability is further improved.

FIG. 16 is a diagram in which the laminated element of the present embodiment is developed for each component, and shows the state of folding when manufacturing the laminated element by folding each component. In addition, FIG. 17 is an explanatory diagram for showing the positional relationship between the constituent parts, and shows the engagement relationship when the constituent parts are stacked.

Five inductor conductors 120-1 and 120
-2, 120-3, 120-4, and 120-5 are 4.5 when the insulating sheet 10 is folded and a laminated body is formed.
It forms a turn inductor and has the same function as the inductor conductor 20a shown in FIGS. 7 and 8 as a whole.

Electrical connection between the divided inductor conductors in the laminated device of this embodiment is performed through a part of the inductor conductors which are laminated facing each other. However, by soldering the portions where the conductors are in contact with each other. , More complete electrical connection can be made. Note that such an electrical connection between the inductor conductors is made possible because the contact portions having different potentials are insulated by the insulating sheet 40 and the other portions are exposed. It can be said that it is a secondary effect of the insulation.

Similarly, the five capacitor conductors 130-
1,130-2,130-3,130-4,130-5
Is to form a coil with 4.5 turns when the insulating sheet 10 is folded to form a laminated body, and to form a capacitor between the inductor sheet 120-1 and the like. As a whole, it has a function equivalent to that of the capacitor conductor 30a shown in FIGS.

The electrical continuity between the divided capacitor conductors is also carried out through a part of the capacitor conductors laminated facing each other. However, by soldering the portions where the conductors are in contact with each other, a more complete electrical connection can be achieved. It can be performed.

As described above, in the laminated element of this embodiment, the inductor conductor and the capacitor conductor are divided along every other bent portion of the insulating sheet 10. Therefore, when the conductors are bent together, Compared with the above-described first embodiment and the like, the workability can be further improved by suppressing the occurrence of springback.

The equivalent circuit of the laminated device of this embodiment can be the one shown in FIG. 4 as it is. Further, the laminated element of this embodiment may be a common mode type as well as a normal mode type.

Fifth Embodiment Next, the laminated device of the fifth embodiment will be described.

The laminated element of this embodiment is characterized in that a second inductor conductor is added to the laminated elements shown in FIGS. 7 and 8 to form a common mode type laminated element.

18 and 19 are views showing the structure of the laminated element of this embodiment. As shown in these figures, the laminated element of the present embodiment is the same as the laminated element shown in FIGS. 7 and 8 except that an insulating sheet 70 having the same shape as the insulating sheet 10 is added.
The inductor conductor 60 having substantially the same shape as the capacitor conductor 30a and having input / output terminals 66 and 68 at both ends, four dummy conductors 64 for filling the gap between the inductor conductor 60, and the inductor conductors 60 are in contact with each other. It has a structure in which four insulating sheets 48 for partially preventing the above are added. Here, the inductor conductor 60 has a groove 62 formed at every other folded portion.

FIG. 20 is an equivalent circuit of the laminated element of this embodiment, which has an inductance L1 of the inductor conductor 20a and an inductance L2 of the inductor conductor 60.
And the capacitance C formed between the inductor conductors 20a and 60 and the capacitor conductor 30a exist in a distributed constant manner.

Thus, the three layers of conductors (inductor conductor 20a, capacitor conductor 30a, inductor conductor 60)
Even when the laminated elements are configured by alternately folding, the insulating sheet 40 insulates partial contact between the inductor conductors 20a and the insulating sheet 48 insulates partial contact between the inductor conductors 60a. Therefore, it is possible to minimize the number of insulating sheets that are folded together when forming the laminated body. Therefore, similar to the above-described first embodiment and the like, there are effects such as thinning and improvement of electrical characteristics.

In particular, since the conductors 20a, 30a and 60 are provided with the grooves 22, 32 and 62 in the folded portions, when three layers of conductors are stacked as in the laminated element of this embodiment, or more. Even when the conductors of the layers are stacked, the spring back is small and the laminate can be easily formed.

Sixth Embodiment Next, the laminated element of the sixth embodiment will be described.

The feature of the laminated element of this embodiment is that the inductor is formed by laminating only the inductor conductor without using the capacitor conductor. That is, the laminated element of this example is the same as the insulating sheet 10 of the laminated element of FIG.
The inductor conductor 20 and the insulating sheet 40 are included. FIG. 25 is a diagram showing the configuration of the laminated element of this embodiment forming an inductor.

As described above, even when only the inductor conductor 20 is alternately folded to form the laminated element,
Insulating sheet 4 prevents partial contact between inductor conductors 20
Since it is insulated with 0, it is possible to minimize the number of insulating sheets that are folded together when forming a laminated body,
It is possible to suppress the occurrence of springback and improve workability.

Note that springback can be further suppressed by forming a groove in each bent portion 12 of the inductor conductor 20, and that the thickness of the element can be made uniform by adding a dummy conductor. Is the same as in each of the above-described embodiments.

Other Embodiments The present invention is not limited to the above-described embodiments, and various modifications can be made in addition to this.

For example, in the laminated element of each of the above-mentioned embodiments, the capacitor conductors 30 and 30a may be divided and each divided portion may be grounded. 21 is a diagram showing an equivalent circuit of a laminated element in which a capacitor conductor is divided and grounded, and FIG. 21A shows a case where the capacitor conductor of the laminated element having the equivalent circuit of FIG. 4 is divided. 20B corresponds to the case where the capacitor conductor of the laminated element having the equivalent circuit of FIG. 20 is divided.

In the laminated element of each of the above-mentioned embodiments, if it is desired to increase the inductance component, a magnetic material may be mixed on the surface of each conductor or in the insulating sheet.

[0097]

As described above, according to the present invention, the contact between the conductors is partially insulated by the second insulating sheet, which is more effective than the case where the entire surface of the conductor is insulated. The area of the insulating sheet can be reduced and the parts can be downsized.

Further, since it is not necessary to have an insulating sheet to be stacked together for insulating the second and third conductors from each other, the occurrence of springback can be suppressed as compared with the case where these insulating sheets are simultaneously bent and folded. It is possible to improve workability.

Further, by thinning the insulating layer interposed between the first conductors or the second conductors, the electrical characteristics can be improved.

[Brief description of drawings]

FIG. 1 is a diagram in which a laminated element according to a first embodiment is developed for each component.

FIG. 2 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG.

FIG. 3 is an explanatory diagram of a case where terminals are provided from a laminated body.

FIG. 4 is an equivalent circuit diagram of the stacked device of the first embodiment.

5 is a diagram showing a structure of a laminated element in which a groove is added to the laminated element of FIG.

FIG. 6 is a diagram showing a structure of a laminated element in which a dummy conductor is added to the laminated element of FIG.

FIG. 7 is a diagram in which a laminated element in which a groove and a dummy conductor are added is developed for each component.

8 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG. 7. FIG.

FIG. 9 is a diagram showing a structure of a laminated element in which a conductor pattern is changed.

FIG. 10 is a developed view of the laminated element of the second embodiment for each component.

FIG. 11 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG.

FIG. 12 is an equivalent circuit diagram of the stacked device of the second embodiment.

FIG. 13 is a developed view of the laminated element of the third embodiment for each component.

FIG. 14 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG.

FIG. 15 is an equivalent circuit diagram of the stacked device of the third embodiment.

FIG. 16 is a developed view of the laminated element of the fourth embodiment for each component.

FIG. 17 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG.

FIG. 18 is a developed view of the laminated element of the fifth embodiment for each component.

FIG. 19 is an explanatory diagram showing a positional relationship of each component of the laminated element of FIG.

FIG. 20 is an equivalent circuit diagram of the stacked device of the fifth embodiment.

FIG. 21 is an equivalent circuit diagram of a stacked element according to another example.

FIG. 22 is an external perspective view of a conventional laminated element.

FIG. 23 is a diagram showing a manufacturing process of a laminated element.

FIG. 24 is a diagram showing positions of conductors in FIG. 23.

FIG. 25 is a diagram showing the structure of the stacked element of the sixth embodiment.

[Explanation of symbols]

 10, 40, 42 Insulation sheet 12 Folding part 14 Bending part 20 Inductor conductor 26, 28 Input / output lead 30 Capacitor conductor 36 Grounding lead

Claims (8)

[Claims] 1. A first insulating sheet having a plurality of folding portions which are alternately folded in the opposite direction and stacked, and the folding portions are alternately reversed on one side of each folding portion of the first insulating sheet. First provided so as to form an inductor having a predetermined number of turns when laminated by being folded in the direction
And a second conductor that is provided on the other surface side of each folded portion of the first insulating sheet so as to substantially face the first conductor and forms a capacitor between the first conductor and the first conductor. A conductor and, when the first and second conductors are folded, covering a portion where the first and second conductors are in contact with each other, and
A laminated element comprising: a plurality of second insulating sheets which are partially provided so as not to reach the bent portions. 2. A first insulating sheet having a plurality of folding portions that are alternately folded in the opposite direction and laminated, and the folding portions are alternately reversed on one side of each folding portion of the first insulating sheet. First provided so as to form an inductor having a predetermined number of turns when laminated by being folded in the direction
And a plurality of second insulating sheets that partially cover the portions where the first conductors are in contact with each other when the first conductors are folded and that are partially provided so as not to reach the bent portions, And a laminated element. 3. The first conductor or the second conductor according to claim 1, wherein the second insulating sheet covers only a portion where the first conductors contact each other or the second conductors contact each other. 3. A laminated element, wherein a third conductor or an insulating sheet is provided in at least one of the gaps of the conductor so as to fill this gap. 4. The laminated element according to claim 1, wherein at least one of the first conductor and the second conductor has a groove in a part of each bent portion. 5. The inductor according to claim 1, 3 or 4, wherein the first conductor is formed as an inductor conductor having input / output terminals provided at both ends thereof, and the second conductor is provided with a ground terminal at one end thereof. A laminated element formed as a capacitor conductor provided with. 6. The inductor according to claim 1, 3 or 4, wherein the first conductor is formed as an inductor conductor having first input / output terminals provided at both ends thereof, and the second conductor is provided at both ends thereof. A laminated element formed as a capacitor conductor provided with a second input / output terminal. 7. The method according to claim 1, wherein at least one of the first conductor and the second conductor is divided along each folded portion of the first insulating sheet which becomes a valley when folded. A plurality of partial conductors, and when the first insulating sheet is folded, electrical connection is made between the partial conductors that face each other with each folded portion of the first insulating sheet serving as a valley therebetween. A laminated element characterized by being performed. 8. The laminated element according to claim 1, wherein the second insulating sheet is an insulating film formed by film forming.