JPH04106910A - Electronic parts - Google Patents

Abstract

PURPOSE:To offer electronic parts of low loss, low heat generation, and high efficiency by inserting a core member in the hole of a coil support in such a way that the boundary face between a magnetic part and an insulating part parallels in the direction of the winding axis of a coil. CONSTITUTION:A coil 1 is buried in a coil support 2. Both ends of the coil 1 are connected in continuity to terminal electrodes 41 and 42, respectively. The coil support 2 is constituted of an insulator, and a hole 21 is provided on the winding axis O1 nearly at the center. The core member 3 is inserted in the hole 21 in such a way that the boundary face between the magnetic part 31 and the insulating part 32 parallels in the direction of the winding axis O1 of the coil, and the core member 3 is inserted in the hole 21 so that the position can be adjusted in the direction of an arrow a or b. This way, electronic parts of low loss, low heat generation, and high efficiency can be obtained.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to an electronic component including a coil portion in which a core member is inserted into a hole provided in a coil support, and the core member has a magnetic portion and an insulating portion. The magnetic part overlaps with the insulating part in between and forms a magnetic path divided by the insulating part, and the boundary surface between the magnetic part and the insulating part is along the direction of the coil winding axis, and the coil support is By inserting it into the hole, it is possible to obtain characteristics depending on the position of the core member, and it also prevents eddy currents generated based on the magnetic flux created by the coil current from flowing between the magnetic parts of the core member. , it is possible to provide an electronic component with low eddy current loss in the core member, low loss, low heat generation, and high efficiency.

<Prior Art> Electronic components including a coil portion in which a core member is inserted into a hole provided in a coil support body are disclosed in Utility Model Application No. 62-4110 as, for example, laminated chip variable coils, laminated chip variable intermediate frequency transformers, etc. , Utility Model No. 62-4111, Utility Model No. 6
No. 2-5618, Utility Model No. 62-5619, Utility Model No. 62
-19715, Utility Model Application Publication No. 62-19716, etc. The basic structure is that a coil is buried inside a coil support made of ferrite, etc., and a through hole is provided on the winding shaft of the coil, and a core member made of ferrite etc. is inserted into the through hole. The inductance value was adjusted by moving the core member.

<Object to be solved by the invention*U> In the above-mentioned conventional technology, when an alternating current is passed through the coil, an eddy current based on the magnetic flux created by the coil current flows inside the core member inserted into the through hole. , eddy current losses occur. In particular, the core member is made of a magnetic material with high magnetic permeability.
For example, if it is made of permalloy, silicon steel, or an amorphous alloy, the eddy current loss will be extremely large because these materials have low electrical resistance. This eddy current loss increases loss, lowers efficiency, and increases heat generation temperature, making further miniaturization difficult. If the core member is made of ferrite having high electrical resistance, eddy current can be reduced. However, ferrite materials with high electrical resistance tend to have poor magnetic properties, such as low magnetic permeability.

For this reason, it has been difficult to obtain electronic components with low eddy current loss and excellent magnetic properties.

Therefore, the object of the present invention is to solve the above-mentioned problems, to make it possible to obtain characteristics according to the position of the core member in the hole of the coil support, and to create an eddy current generated based on the magnetic flux created by the coil current. is prevented from flowing between the magnetic parts of the core member, and the eddy current loss in the core member is small.
The objective is to provide electronic components with low loss, low heat generation, and high efficiency.

Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides an electronic component having a coil portion in which a coil is embedded inside a coil support, wherein the coil portion is located inside the coil support. It has a core member inserted into a hole provided on a coil winding shaft, the core member includes a magnetic part and an insulating part that are integrally coupled, and the magnetic part is connected to the insulating part. The core member is arranged such that the boundary surface between the magnetic part and the insulating part is along the direction of the coil winding axis. , is inserted into the hole.

Effect> Since the coil part has a core member inserted into a hole provided on the coil winding axis of the coil support, the characteristics depending on the position of the core member, such as the inductance value or mutual inductive coupling, can be obtained.

The magnetic parts that make up the core member overlap with an insulating part in between, forming a magnetic path partitioned by the insulating part. Since the coil is inserted into the hole along the same line, the eddy current generated based on the magnetic flux created by the coil current is
It is blocked by the insulating parts placed between the magnetic parts and cannot flow between them. Therefore, an electronic component with low eddy current loss, low loss, low heat generation, and high efficiency can be obtained. Although eddy currents can flow inside the magnetic parts, since the cross-sectional area of each magnetic part is small, the path of the eddy currents is short and the eddy current losses are small. As mentioned above, due to the high eddy current suppression effect, the magnetic portion of the core member can be constructed from a magnetic material with high magnetic permeability, such as permalloy, silicon steel, or an amorphous alloy.

Since the magnetic portion forms a magnetic path for the magnetic flux generated by the coil current, the necessary magnetic properties can be ensured by the magnetic portion.

The electronic component according to the present invention includes a coil component alone, a composite component in combination with a passive circuit element such as a capacitor or a resistor,
Alternatively, it includes hybrid integrated circuit components that are a combination of these and integrated circuit components. Examples of uses for coil parts alone include:
There are magnetic field generating means such as inductors, transformers, rotary transformers, mixer transformers, or motor stators, and examples of applications of composite parts include trap elements, low-pass filters, bypass filters, band-pass filters, equalizers, and IFTs. Hybrid integrated circuit components include highly integrated, high-performance, ultra-small equalizer amplifiers, DC/DC converters, active filters, and the like.

<Example> Figure $1 is a partially cutaway perspective view of an electronic component according to the present invention;
The figure is also a front sectional view. 1 is a coil, 2 is a coil support body, 3 is a core member, and 41 and 42 are terminal electrodes.

The coil 1 is embedded inside the coil support 2.

Both ends of the coil 1 are electrically connected to terminal electrodes 41 and 42, respectively. The coil support 2 is made of a magnetic or non-magnetic insulator, and a hole 21 is provided on the coil winding axis oI approximately in the center thereof. The technique for embedding the coil 1 in the coil support 2 is disclosed in Japanese Patent Publication No. 57-395.
The technology described in Publication No. 21 and the like can be used.

The core member 3 includes a magnetic portion 31 and an insulating portion 32 that are integrally coupled, as shown in an enlarged view in FIG. The magnetic portions 31 overlap with the insulating portion 32 in between, and constitute a magnetic path partitioned by the insulating portion 32. In the core member 3, the boundary surface between the magnetic portion 31 and the insulating portion 32 is aligned with the coil winding axis 0. It is inserted into the hole 21 along the direction of. The core member 3 is inserted into the hole 21 by means such as screws or press-fitting, so that it can be adjusted in position in the direction of arrows a or b (see FIG. 2). After positioning, adhesive may be applied.

The magnetic portions 31 and the insulating portions 32 shown in the embodiment are alternately laminated and integrally bonded by mutual bonding force.

The thickness of the magnetic portion 31, the thickness of the insulating portion 32, and the number of layers that determine the overall diameter are arbitrary. The magnetic portion 31 is made of ferrite, permalloy, silicon steel, amorphous alloy, or the like. The insulating portion 32 can be made of an insulating material such as ceramic.

As shown in FIG. 3, when the magnetic flux φ produced by the coil current passes through the magnetic portion 31, an eddy current Ie tends to occur around it. Since the insulating portion 32 exists in the direction of this eddy current IeI, the eddy current Ie is blocked by the insulating portion 32 and cannot flow between the magnetic portions 31-31. Therefore, an electronic component with low eddy current loss, low loss, low heat generation, and high efficiency can be obtained. Although eddy currents can flow inside the magnetic portions 31, since the individual magnetic portions 31 have small cross-sectional areas, the paths of the eddy currents are shortened, and eddy current losses are reduced.

FIG. 4 is a perspective view showing another embodiment of the core member 3.

In this embodiment, the magnetic portion 31 and the insulating portion 32 are arranged coaxially. Although not shown, the magnetic portion 31 and the insulating portion 32 may be arranged in a spiral shape. In these cases as well, similar effects can be obtained.

FIG. 5 is a partially cutaway perspective view of another embodiment of the electronic component according to the present invention, and FIG. 34s is a front sectional view thereof. This embodiment has a plurality of coils 101, 102,
The magnetic path constituted by the magnetic portion 31 is shared by the plurality of coils 101.102, and the plurality of coils 101.
102 is inductively coupled. Therefore, the fifth
The embodiments of the figures and FIG. 6 illustrate electronic components useful as various transformers. 41 to 44 are terminal electrodes.

FIG. 7 is a partially cutaway perspective view of another embodiment of the electronic component according to the present invention, and FIG. 8 is a front sectional view thereof.

A feature of this embodiment is that not only the core member 3 but also the coil support 2 are composed of a magnetic portion 22 and an insulating portion 23. The magnetic portions 22 sandwich an insulating portion 23 therebetween, and constitute a magnetic path partitioned by the insulating portion 23. The magnetic portions 22 and the insulating portions 23 are alternately laminated and are integrally bonded by mutual bonding force. magnetic part 2
2, the thickness of the insulating portion 23, and the total thickness can be determined arbitrarily. The magnetic portion 22 is made of ferrite, permalloy, silicon steel, amorphous alloy, or the like. The insulating portion 23 can be made of an insulator such as a ceramic material.

The coil 1 is formed such that the winding axis is along the direction of the boundary between the magnetic portion 22 and the insulating portion 23 .

When the magnetic flux created by the coil current passes through the magnetic part 22, an eddy current is generated around it, but since there is an insulating part 23, the eddy current is blocked by the insulating part 23 and flows between the magnetic parts 22-22. I can't. Therefore, an electronic component with low eddy current loss, low loss, low heat generation, and high efficiency can be obtained. The necessary magnetic properties can be ensured by the magnetic portion 22. Since eddy currents can be blocked by the insulating part 23, it is possible to use a material with excellent magnetic properties as the magnetic part 22, with emphasis placed on improving the magnetic properties rather than suppressing the eddy currents.

FIG. 9 shows an example of an LC composite part. 6 is a coil portion, and 7 is a capacitor portion. The coil section 6 includes a coil 1 , a coil support 2 and a core member 3 . The core member 3 is composed of a magnetic part 31 and an insulating part 32. Each of the magnetic parts 31 forms a magnetic path for the magnetic flux produced by the coil current, and the insulating part 32 is arranged to fill in the space between the magnetic parts 31-31.

The capacitor portion 7 has a capacitor network 72 embedded inside a dielectric ceramic 71. The capacitor network 72 is constructed by connecting capacitors formed with electrodes facing each other via a dielectric ceramic layer to form a required capacitor circuit. The circuit configuration of the capacitor network 72 is arbitrarily selected depending on the application. The capacitor part 6 is laminated continuously with the coil part 6 in an integrated state by means such as sintering or adhesion. The coil 1 of the coil section 6 and the capacitor network 72 of the capacitor section are connected to the terminal electrodes 41, 42 in such a way that the desired circuit is obtained.

Although not shown, a structure in which capacitor portions are provided on both sides of the coil portion 6 or a structure in which the coil portion 6 is provided on one or both sides of the capacitor portion 7 may be used.

FIG. 10 shows a hybrid integrated circuit component. 8 is an integrated circuit component. The integrated circuit component 8 is a chip containing a transistor circuit, etc., and is mounted on the surface side of the capacitor portion. 81 is a chip body, and 82 is a lead conductor. The lead conductor 82 is soldered to conductor patterns 91 and 92 formed on the surface of the capacitor portion, and is connected to the capacitor and the coil to form a predetermined circuit.

10 is a resistor, 11 to 14 are conductive patterns for the resistor 10, 15 is a crossover insulating layer, and 16 is an insulating coating layer. The resistor 10 is formed on at least the negative side of the coil portion 6 or the capacitor portion 7 by means such as printing, and the insulating layer 15 and the insulating coating layer 16 are made of glass.

Although not shown, the embodiments described above can be combined in various ways. In addition to the examples, mixer transformers, magnetic field generators such as motor stators, trap elements, low-pass filters, bypass filters, band-pass filters, equalizers or IFTs, equalizer amplifiers, DC/DC converters, or active filters are also available. Various electronic components such as can be realized. Further, the coil, coil support, core member, capacitor portion, etc. constituting the coil portion can be formed by a thick film technique such as screen printing or plating, or a thin film technique such as sputtering or vapor deposition.

<Effects of the Invention> As described above, according to the present invention, the following effects can be obtained.

(a) Since the coil portion has a core member inserted into a hole provided on the coil winding shaft of the coil support,
An electronic component having characteristics depending on the position of the core member can be provided.

(b) The magnetic parts constituting the core member overlap with an insulating part in between, forming a magnetic path partitioned by the insulating part, and the core member has an interface between the magnetic part and the insulating part that is the coil winding axis. Since it is inserted into the hole along the direction of , it is possible to provide an electronic component with low eddy current loss, low loss, low heat generation, and high efficiency.

(C) Since eddy currents can be blocked by the insulating portion, it is possible to provide an electronic component with excellent magnetic properties in which the magnetic portion of the core member is made of a magnetic material with high magnetic permeability, such as permalloy, silicon steel, or an amorphous alloy.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an electronic component according to the present invention, and FIG.
The figures are also front sectional views, Figure 's3 is a perspective view of a core member constituting an electronic component according to the present invention, Figure 4 is a perspective view showing another embodiment of the core member, and Figure 5 is a perspective view of a core member constituting an electronic component according to the present invention. FIG. 6 is a partially cutaway perspective view of another embodiment of the electronic component, FIG. 7 is a front sectional view thereof, FIG. 7 is a partially cutaway perspective view of another embodiment of the electronic component according to the present invention, and FIG. Similarly, FIG. 9 is a cross-sectional view of the electronic component according to the present invention embodied as an LC composite component, and FIG. 10 is a partial cross-sectional view of the electronic component according to the present invention embodied as a hybrid integrated circuit component. It is a diagram. 1.101.102... Coil 2... Coil support 21... Hole 31... Magnetic part 32... Insulating part diagram

Claims (8)

[Claims] (1) An electronic component having a coil portion in which a coil is embedded inside a coil support, the coil portion having a core member inserted into a hole provided on a coil winding shaft of the coil support. The core member includes a magnetic part and an insulating part that are integrally coupled, and the magnetic part overlaps with the insulating part in between, and a magnetic path is defined by the insulating part. An electronic component comprising: the core member being inserted into the hole such that a boundary surface between the magnetic portion and the insulating portion is along the direction of the coil winding axis. (2) The coil support includes a magnetic part and an insulating part that are integrally coupled, and the magnetic part overlaps with the insulating part in between, and a magnetic path is defined by the insulating part. 2. The electronic device according to claim 1, wherein the coil is provided with a coil winding axis along a boundary surface between the magnetic portion and the insulating portion that constitute the coil support. parts. (3) The electronic component according to claim 1 or 2, wherein the core member is variably adjustable. (4) The electronic component according to claim 1, 2 or 3, wherein the magnetic portion and the insulating portion are alternately laminated. (5) The electronic component according to claim 1, 2, 3, or 4, wherein the number of the coils is one. (6) The electronic component according to claim 1, 2, 3, or 4, wherein the number of coils is plural. (7) The electronic component according to claim 6, wherein at least one set of the plurality of coils is inductively coupled. (8) The electronic device according to claim 1, 2, 3, 4, 5, 6, or 7, wherein at least one of a passive circuit component and an active circuit component is provided on the coil support. parts.