WO2016068067A1

WO2016068067A1 - Coil component

Info

Publication number: WO2016068067A1
Application number: PCT/JP2015/080085
Authority: WO
Inventors: 喜人大坪; 西出　充良
Original assignee: 株式会社村田製作所
Priority date: 2014-10-31
Filing date: 2015-10-26
Publication date: 2016-05-06
Also published as: JPWO2016068067A1

Abstract

Provided is a coil component capable of easily increasing the number of turns of a coil electrode wound around a coil core. A coil component 1a comprises: an insulation layer 2 in which an annular coil core 3 is embedded; and a coil electrode 4 wound around the coil core 3. The coil electrode 4 has a plurality of lower wiring patterns 6b arranged on a lower surface of the insulating layer 2, and a plurality of upper wiring patterns 6a arranged on an upper surface of the insulation layer 2 so as to respectively form a plurality of pairs with the lower wiring patterns 6b. Each lower wiring pattern 6b is disposed, when viewed in a plane, perpendicular to a central axis CA parallel to a winding axis of the coil electrode 4 of the coil core 3. Each upper wiring pattern 6a is disposed, when viewed in a plane, such that a straight imaginary line VL, which crosses both an outer overlapping line OL and an inner overlapping line IL and is perpendicular to a tangential line of an inner circumferential circle of the coil core 3, is drawn, the outer overlapping line OL and the inner overlapping line IL being formed by overlapping said upper wiring pattern 6a with the outer circumferential circle and the inner circumferential circle, respectively.

Description

Coil parts

The present invention relates to a coil component including an insulating layer in which a coil core is embedded and a coil electrode wound around the coil core.

In an electronic device using a high-frequency signal, a coil component may be used to prevent noise. This type of coil component includes a coil core formed of a magnetic material or the like and a coil electrode around which the coil core is wound. Here, the winding of the coil electrode is often performed manually, and eliminating this manual operation has been an issue in reducing the manufacturing cost of the coil component.

Therefore, conventionally, coil parts that do not require manual work for winding the coil electrode have been proposed. For example, a coil component 100 described in Patent Document 1 shown in FIG. 10 includes a plate-like base portion 101 made of ceramic containing a magnetic material and a coil electrode 102 embedded in the base portion 101. .

The coil electrode 102 includes a plurality of first coil patterns 102a (see FIG. 10A) formed on the upper surface of the base portion 101 and a plurality of second coil patterns 102b (see FIG. 10) formed on the lower surface of the base portion 101. 10 (b)) and a plurality of via conductors 103 connecting predetermined first and second coil patterns 102a and 102b. An annular virtual line VL2 is set in the base body 101, and the toroidal coil is formed by winding the coil electrode 102 spirally along the circumferential direction of the virtual line VL2. According to this configuration, the manual operation is not necessary for winding the coil electrode 102, so that the manufacturing cost of the coil component 100 can be reduced. 10A is a plan view of the coil component 100, and FIG. 10B is a bottom view of the coil component 100. FIG.

Japanese Patent Laying-Open No. 2013-98310 (see paragraphs 0013 to 0017, FIG. 3, etc.)

Incidentally, in this type of coil component, it is required to improve the coil characteristics without increasing the size of the coil component. As an example of improving the coil characteristics, it is conceivable to increase the number of turns of the coil electrode to obtain a high inductance. However, in the conventional coil electrode 102, a part of the first coil pattern 102a is arranged so as to be orthogonal to the virtual line VL2 in plan view. For example, each of the second coil patterns 102b is virtual in plan view. Arranged obliquely from the direction orthogonal to the line VL2. Thus, when the direction of each second coil pattern 102b is shifted from the direction orthogonal to the virtual line VL2 in plan view, it is difficult to increase the number of turns of the coil electrode 102.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a coil component that can easily increase the number of turns of a coil electrode that winds a coil core.

In order to achieve the above object, a coil component of the present invention includes an insulating layer in which an annular coil core is embedded, and a coil electrode wound around the coil core, and the coil electrode has one end. A plurality of first wiring patterns arranged on the inner peripheral side of the coil core and the other end arranged on the outer peripheral side of the coil core, arranged on one main surface of the insulating layer, and one end of the inner circumference of the coil core And the other end is arranged on the outer peripheral side of the coil core, and a plurality of second lines arranged on the other main surface of the insulating layer so as to form a plurality of pairs with each of the first wiring patterns. A plurality of wiring patterns, which are arranged on the inner peripheral side of the coil core, connect one end of each of the first wiring patterns and one end of the second wiring pattern that forms a pair with the first wiring pattern. The second conductor adjacent to the second wiring pattern disposed on the outer peripheral side of the one side conductor, the coil core, and the other end of each of the first wiring patterns and the first wiring pattern. A plurality of other conductors connecting the other end of the wiring pattern, and each of the first and second wiring patterns is formed by overlapping the wiring pattern and the outer circumference of the coil core in plan view. An imaginary straight line that intersects both the outer overlapped line and the inner overlapped line formed by the overlapping of the wiring pattern and the inner circumference of the coil core and orthogonal to the tangent of the inner circumference of the coil core can be drawn. It is characterized by being arranged like this.

The virtual straight line is a straight line orthogonal to the central axis parallel to the winding axis direction of the coil electrode of the coil core in plan view. A wiring pattern that intersects both the outer overlapping line and the inner overlapping line on the virtual straight line is arranged at an angle close to the direction orthogonal to the coil core (the central axis) in a range overlapping the coil core in plan view. . According to such an arrangement, all the first and second wiring patterns constituting the coil electrode can be arranged at an angle close to the direction orthogonal to the coil core in plan view, so that the number of turns of the coil electrode can be easily set. Can be increased.

Further, each of the first wiring patterns may be arranged so as to be orthogonal to a central axis parallel to a winding axis direction of the coil electrode in a plan view of the coil core. In this case, the increase in the number of turns of the coil electrode is further facilitated. In addition, the first wiring pattern is arranged so as to be orthogonal to the central axis, and the second wiring pattern forming a pair is arranged so as to be shifted from the first wiring pattern in plan view within a range where the virtual straight line can be drawn. In addition, the number of turns of the coil electrode can be increased, and the connection by one or the other side conductors of both wiring patterns forming a pair can be facilitated.

Further, both the first wiring patterns and the second wiring patterns may be arranged so as to be orthogonal to the central axis parallel to the winding axis direction of the coil electrode of the coil core in a plan view. Good. According to this configuration, since all of the first and second wiring patterns are arranged so as to be orthogonal to the coil core (the central axis), the number of turns of the coil electrode can be further increased.

Further, each of the first and second wiring patterns may be arranged so as to overlap the imaginary straight line in plan view from the one end to the other end. In this case, since the first and second wiring patterns are disposed so as to be substantially orthogonal to the coil core over the entire length direction, the number of turns of the coil electrode can be further increased.

One of each of the first wiring patterns and each of the second wiring patterns includes a linear main body portion that is substantially orthogonal to the central axis in plan view, and one end thereof is connected to the main body portion and bends. You may have a bending part. According to this configuration, it is possible to easily increase the number of turns of the coil electrode while easily winding the coil electrode in a spiral shape.

And an insulating layer in which an annular coil core is embedded, and a coil electrode wound around the coil core, the coil electrode having one end disposed on the inner peripheral side of the coil core and the other end A plurality of first wiring patterns arranged on the outer peripheral side of the coil core and arranged on one main surface of the insulating layer, and one end arranged on the inner peripheral side of the coil core and the other end on the outer peripheral side of the coil core A plurality of second wiring patterns arranged on the other principal surface of the insulating layer so as to form a plurality of pairs with each of the first wiring patterns, and arranged on the inner peripheral side of the coil core, A plurality of one-side conductors connecting one end of each first wiring pattern and one end of the second wiring pattern paired with the first wiring pattern, and disposed on the outer peripheral side of the coil core A plurality of other-side conductors connecting the other end of each of the first wiring patterns and the other end of the second wiring pattern adjacent to the second wiring pattern paired with the first wiring pattern The coil core includes two linear portions arranged in parallel, a first curved portion having a semicircular shape in plan view that connects one ends of the two linear portions, and the other ends of the two linear portions. Each of the first and second wiring patterns arranged in the straight line part is formed in an oval shape composed of a semicircular second curved part connected to each other in plan view. Crosses both the outer overlapping line formed by the overlap of the wiring pattern and the outer periphery of the coil core and the inner overlapping line formed by the overlap of the wiring pattern and the inner periphery of the coil core, and the straight line portion Draw an orthogonal virtual straight line Thus, each of the first and second wiring patterns arranged and arranged in the first and second curved portions is formed by overlapping of the wiring pattern and the outer circumference of the coil core in plan view. An imaginary straight line that intersects both the outer overlapping line and the inner overlapping line formed by the overlapping of the wiring pattern and the inner peripheral circle of the coil core and orthogonal to the tangent of the inner peripheral circle of the coil core can be drawn. , May be arranged. In this case, when the coil core is formed in an oval shape, the number of turns of the coil electrode can be easily increased.

Moreover, each said one side conductor and each said other side conductor may be formed with the metal pin.
In the case of via conductors or through-hole conductors that require the formation of through-holes, it is necessary to provide a predetermined gap between adjacent conductors in order to form independent through-holes. There is a limit to increasing the number of turns of the coil. On the other hand, in the case of a metal pin that does not form a through hole, it is easy to narrow the gap between adjacent metal pins, so that the number of turns of the coil electrode can be easily increased.

In addition, since the metal pin has a lower specific resistance than a via conductor or a through-hole conductor formed by filling a via hole with a conductive paste, the resistance value of the entire coil electrode can be reduced. Therefore, for example, a coil component excellent in coil characteristics such as Q value can be provided.

According to the present invention, since all of the first and second wiring patterns constituting the coil electrode are arranged so as to be substantially orthogonal to the coil core in plan view, the number of turns of the coil electrode can be easily increased.

It is sectional drawing of the coil components concerning 1st Embodiment of this invention. It is a top view of the coil component of FIG. It is a figure for demonstrating the wiring pattern of FIG. It is a figure which shows the modification of a wiring pattern. It is a top view of the coil components concerning 2nd Embodiment of this invention. It is a figure for demonstrating the wiring pattern of FIG. It is a top view of the coil components concerning 3rd Embodiment of this invention. It is a figure for demonstrating the wiring pattern of FIG. It is a top view of the coil components concerning 4th Embodiment of this invention. It is a figure which shows the conventional coil components.

<First Embodiment>
A coil component 1a according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a sectional view of the coil component 1a, FIG. 2 is a plan view of the coil component 1a, and FIG. 3 is a diagram for explaining the wiring patterns 6a and 6b. FIG. 3A is a plan view of the coil component 1a with the upper wiring pattern 6a removed, and FIG. 3B is a plan view of the coil component 1a with the lower wiring pattern 6b removed.

As shown in FIGS. 1 and 2, the coil component 1 a according to this embodiment includes an insulating layer 2 in which a coil core 3 is embedded and a coil electrode 4 wound around the coil core 3. It is mounted on an electronic device such as a mobile phone used.

The insulating layer 2 is formed of, for example, a resin such as an epoxy resin, and is formed with a predetermined thickness so as to cover the coil core 3 and a plurality of metal pins 5a and 5b described later.

The coil core 3 is formed of a magnetic material that is employed as a general coil core such as Mn—Zn ferrite. In addition, the coil core 3 of this embodiment has comprised the annular | circular shape.

The coil electrode 4 is spirally wound around the annular coil core 3, and has a plurality of metal pins 5 a disposed around the coil core 3 in a state of being erected in the thickness direction of the insulating layer 2. 5b, and a plurality of upper wiring patterns 6a and a plurality of lower wiring patterns 6b. Each metal pin 5a, 5b is formed of a metal material generally adopted as a wiring electrode, such as Cu, Au, Ag, Al, or a Cu-based alloy. Moreover, in this embodiment, each metal pin 5a, 5b is formed in the column shape.

Each lower wiring pattern 6b is formed on the lower surface of the insulating layer 2 (corresponding to “one main surface of the insulating layer” of the present invention). At this time, each lower wiring pattern 6 b is arranged in the circumferential direction in a state where one end is disposed on the inner peripheral side of the coil core 3 and the other end is disposed on the outer peripheral side of the coil core 3.

Each upper wiring pattern 6a is formed on the upper surface of the insulating layer 2 (corresponding to “the other main surface of the insulating layer” of the present invention) so as to form a plurality of pairs with each lower wiring pattern 6b. At this time, each upper wiring pattern 6 a is arranged in the circumferential direction in a state where one end is disposed on the inner peripheral side of the coil core 3 and the other end is disposed on the outer peripheral side of the coil core 3, similarly to each lower wiring pattern 6 b. The In this embodiment, the upper and lower wiring patterns 6a and 6b are formed in a slightly tapered shape from the outer peripheral side toward the inner peripheral side.

These upper and lower wiring patterns 6a and 6b can be formed by screen printing using a conductive paste containing a metal such as Cu or Ag, for example. Since the conductive paste is formed by mixing a filler formed of Cu or Ag and an organic solvent, in this embodiment, the upper and lower wiring patterns 6a and 6b are compared with the metal pins 5a and 5b. And the specific resistance is high.

Each of the upper and lower wiring patterns 6a and 6b includes, for example, a base electrode formed of a conductive paste containing a metal such as Cu or Ag on the upper surface (or lower surface) of the insulating layer 2, and the base For example, the electrode may be formed in a two-layer structure with a surface electrode laminated by Cu plating. In this case, the resistance value can be lowered as compared with the case where the upper and lower wiring patterns 6a and 6b are formed only with the conductive paste. The upper wiring pattern 6a corresponds to the “second wiring pattern” of the present invention, and the lower wiring pattern 6b corresponds to the “first wiring pattern” of the present invention.

Each of the metal pins 5a and 5b is arranged along the inner peripheral surface of the coil core 3 (hereinafter may be referred to as the inner metal pin 5a), and is arranged along the outer peripheral surface of the coil core 3 (hereinafter referred to as “inner metal pin 5a”). , Sometimes referred to as the outer metal pin 5b). In this embodiment, the upper end surface of each inner metal pin 5a and each outer metal pin 5b is exposed from the upper surface of the insulating layer 2, and the lower end surface of each inner metal pin 5a and each outer metal pin 5b is the insulating layer. 2 exposed from the lower surface. Here, each inner metal pin 5a corresponds to "one side conductor" of the present invention, and each outer metal pin 5b corresponds to "other side conductor" of the present invention.

Each inner metal pin 5a connects one end of each lower wiring pattern 6b to one end of the upper wiring pattern 6a paired with the lower wiring pattern 6b. Each outer metal pin 5b is connected to the other end of each lower wiring pattern 6b and the upper wiring adjacent to a predetermined side (in this embodiment, clockwise) of the upper wiring pattern 6a paired with the lower wiring pattern 6b. The other end of the pattern 6a is connected to each other.

In this embodiment, the inner and outer metal pins 5a and 5b are formed in a cylindrical shape, but may be formed in a prismatic shape, for example. Also, the inner and outer metal pins 5a and 5b may be formed of via conductors.

With the configuration as described above, the coil electrode 4 spirally wound around the coil core 3 is formed. In this embodiment, the coil electrode 4 is devised so that the number of turns of the coil electrode 4 can be easily increased. Yes.

Specifically, as shown in FIG. 3A, each lower wiring pattern 6b has a central axis CA parallel to the winding axis direction of the coil electrode 4 of the coil core 3 (see the one-dot chain line in FIG. 2). They are arranged so as to be orthogonal in a plan view. In other words, each lower wiring pattern 6 b is formed by overlapping the outer wiring line OL and the inner circumferential circle formed by overlapping the lower wiring pattern 6 b and the outer circumferential circle of the coil core 3 in plan view. Among the plurality of virtual straight lines VL (see the two-dot chain line in FIG. 3) that intersect both of the inner overlapping lines IL and orthogonal to the tangent to the inner circumference of the coil core 3, the width direction of the lower wiring pattern 6b ( It is arranged in parallel to a virtual straight line VL passing through the center in the short direction. Here, the virtual straight line VL is a straight line orthogonal to the central axis CA.

Each upper wiring pattern 6a overlaps in plan view with one end (inner peripheral side) of the lower wiring pattern 6b whose one end (inner peripheral side) forms a pair, and the other end (outer peripheral side) forms a pair. The lower wiring pattern 6b adjacent to the pattern 6b (adjacent in the counterclockwise direction) is disposed so as to partially overlap. The inner metal pin 5a is disposed at a position where one end of the upper wiring pattern 6a and one end of the lower wiring pattern 6b overlap in plan view, and the other end of the upper wiring pattern 6a and the other end of the lower wiring pattern 6b. The outer metal pin 5b is disposed at a position where the two overlap.

Further, as shown in FIG. 3B, each upper wiring pattern 6a has an outer overlapping line OL and an inner peripheral circle formed by overlapping the upper wiring pattern 6a and the outer peripheral circle of the coil core 3 in plan view. Are arranged so as to draw a virtual straight line VL that intersects both of the inner overlapping lines IL formed by the overlap with each other and that is perpendicular to the tangent to the inner circumference of the coil core 3. Here, each upper wiring pattern 6a forms a pair such that the other end overlaps the other end (outer peripheral side) of the lower wiring pattern 6b adjacent to the lower wiring pattern 6b forming a pair in plan view. The lower wiring pattern 6b is displaced from the plan view. Thus, in this embodiment, the number of turns of the coil electrode 4 is easily increased by arranging both the upper and lower wiring patterns 6a and 6b at an angle orthogonal to or close to the central axis CA. It is configured to be able to. In this embodiment, each of the upper and lower wiring patterns 6a and 6b is arranged so as to overlap with one virtual straight line VL in plan view from one end to the other end.

(Manufacturing method of coil parts)
Next, an example of a method for manufacturing the coil component 1a will be briefly described.

First, the metal pins 5a and 5b are arranged on one main surface of the flat transfer plate. In this case, the upper end surfaces of the metal pins 5a and 5b are fixed to one main surface of the transfer plate, and the metal pins 5a and 5b are fixed in a standing state. The metal pins 5a and 5b can be formed by, for example, shearing a metal wire (for example, Cu, Au, Ag, Al, or Cu alloy) having a circular cross section.

Next, a resin layer is formed on one main surface of the resin sheet with a release layer (flat plate shape). In this case, the resin sheet, the release layer, and the resin layer are arranged in this order, and the resin layer is formed in an uncured state.

Next, the transfer plate is inverted and mounted on the resin sheet so that the lower end surfaces of the metal pins 5a and 5b are in contact with the resin layer, and then the resin in the resin layer is cured.

Next, after peeling off the transfer plate, the coil core 3 is disposed at a predetermined position on the resin sheet, and the metal pins 5a and 5b and the coil core 3 are molded with, for example, epoxy resin to form the insulating layer 2 on the resin sheet. To do.

Next, the resin sheet with a release layer is peeled off, and the front and back surfaces of the insulating layer 2 are polished or ground. Thereby, the upper end surface of each metal pin 5a, 5b is exposed from the upper surface of the insulating layer 2, and the lower end surface is exposed from the lower surface of the insulating layer 2.

Finally, the upper wiring patterns 6a are formed on the upper surface of the insulating layer 2, and the lower wiring patterns 6b are formed on the lower surface of the insulating layer 2, thereby completing the coil component 1a. Each of the upper and lower wiring patterns 6a and 6b can be formed by screen printing using a conductive paste containing a metal such as Cu, for example. Further, the upper and lower wiring patterns 6a and 6b may be formed in a two-layer structure by performing Cu plating on the wiring pattern formed of this conductive paste. In addition, as another example of the method of forming the upper and lower wiring patterns 6a and 6b, for example, a predetermined pattern shape (upper or lower side) is formed by etching a plate member with a Cu foil attached to one main surface. The shape of the wiring patterns 6a and 6b). This plate-like member is prepared individually for each of the upper and lower wiring patterns 6a and 6b. In this case, the upper and lower wiring patterns 6a and 6b can be bonded to the upper end surface or the lower end surface of the metal pins 5a and 5b by ultrasonic bonding using the plate-like member.

Therefore, according to the above-described embodiment, each of the lower wiring patterns 6b is arranged so as to be orthogonal to the central axis CA, and each of the upper wiring patterns 6a is arranged on the outer overlapping line OL in a plan view. Further, the imaginary straight line VL intersecting both the inner overlapping line IL and perpendicular to the tangent of the inner circumferential circle of the coil core 3 is arranged. Since this virtual straight line VL is a straight line orthogonal to the central axis CA, the wiring pattern that can be drawn by the virtual straight line VL intersecting both the outer overlap line OL and the inner overlap line IL is in a range overlapping the coil core 3 in plan view. The coil core 3 (center axis CA) is arranged substantially orthogonally. According to this configuration, since all the upper and lower wiring patterns 6a and 6b constituting the coil electrode 4 can be arranged so as to be orthogonal or substantially orthogonal to the coil core 3 in plan view, the number of turns of the coil electrode 4 can be reduced. It can be increased easily.

The lower wiring pattern 6b is arranged so as to be orthogonal to the central axis CA, and the paired upper wiring patterns 6a are arranged so as to be shifted from the lower wiring pattern 6b in a plan view within a range in which a virtual straight line VL can be drawn. The In this way, it is possible to easily form an overlap between the other end of the upper wiring pattern 6a and the other end of the lower wiring pattern 6b adjacent to the paired lower wiring pattern 6b in a plan view. Therefore, the upper wiring pattern 6a and the lower wiring pattern 6b can be easily connected with the configuration using the columnar metal pins 5a and 5b.

Also, in this type of coil component, the coil characteristic (eg, Q value) can be improved by lowering the resistance value of the entire coil electrode. Therefore, when the specific resistance of the upper and lower wiring patterns 6a and 6b is high as in this embodiment, the coil characteristics can be improved by shortening the length of the upper and lower wiring patterns 6a and 6b. Can do. In this respect, in this embodiment, the upper and lower wiring patterns 6a and 6b are arranged so as to be substantially orthogonal to the central axis CA of the coil core 3 in a plan view, whereby the inner metal pin 5a and the outer metal pin 5b are arranged. Connection distance can be shortened. That is, since the portion occupied by the upper and lower wiring patterns 6a and 6b having a high specific resistance in the entire length of the coil electrode 4 can be reduced, the coil characteristics can be improved.

Further, in the case of the metal pins 5a and 5b, it is easy to narrow the gap between the adjacent metal pins 5a and 5b as compared with the via conductor or the through-hole conductor that requires the formation of a through hole in the insulating layer 2. Therefore, the number of turns of the coil electrode 4 can be easily increased. Further, since the metal pins 5a and 5b have a lower specific resistance than a via conductor or a through-hole conductor formed by filling a via hole with a conductive paste, the resistance value of the coil electrode 4 as a whole can be lowered. Therefore, for example, the coil component 1a having excellent coil characteristics such as the Q value can be provided.

(Modification of wiring pattern)
Next, a modification of the wiring patterns 6a and 6b will be described with reference to FIG. 4A and 4B are diagrams for explaining modifications of the wiring patterns 6a and 6b, in which FIG. 4A is a plan view of the coil component 1a with the upper wiring pattern 6a removed, and FIG. 4B is a lower wiring pattern. It is a top view of the coil component 1a of the state except 6b.

In the above-described embodiment, the case where each of the upper and lower wiring patterns 6a and 6b is formed in a slightly tapered shape from the outer peripheral side (the other end) toward the inner peripheral side (one end) has been described. The shapes of the upper and lower wiring patterns 6a and 6b can be changed as appropriate. For example, as shown in FIG. 4, each of the upper and lower wiring patterns 6a and 6b may be formed in a straight line having an equal line width from one end to the other end.

Second Embodiment
A coil component 1b according to a second embodiment of the present invention will be described with reference to FIGS. 5 is a plan view of the coil component 1b, and FIG. 6 is a diagram for explaining the wiring patterns 6a and 6b. 6A is a plan view of the coil component 1b with the upper wiring pattern 6a removed, and FIG. 6B is a plan view of the coil component 1b with the lower wiring pattern 6b removed.

The coil component 1b according to this embodiment differs from the coil component 1a of the first embodiment described with reference to FIGS. 1 to 3 in that each of the upper and lower wirings is as shown in FIGS. The patterns 6a and 6b are formed in a straight line having the same line width from one end to the other end, and each lower wiring pattern 6b is arranged with an angle shifted from the direction orthogonal to the central axis CA. That is. Since other configurations are the same as those of the first embodiment, the description thereof is omitted by attaching the same reference numerals.

In this case, each of the upper and lower wiring patterns 6a and 6b is an imaginary straight line that intersects both the outer overlapping line OL and the inner overlapping line IL in a plan view and is orthogonal to the tangent of the inner circumferential circle of the coil core 3. As long as VL can be drawn, the angle is shifted from the direction orthogonal to the central axis CA. Here, the amount of deviation of the upper wiring pattern 6a (the amount of deviation (angle) from the direction orthogonal to the central axis CA) is set larger than that of the lower wiring pattern 6b. Then, due to the difference in the shift amount, between the other end (outer peripheral side) of the upper wiring pattern 6a and the other end of the lower wiring pattern 6b adjacent to the lower wiring pattern 6b that forms a pair with the upper wiring pattern 6a. A region that overlaps with each other in plan view is formed. And the outer metal pin 5b is arrange | positioned to the said overlapping area | region similarly to 1st Embodiment. According to this configuration, the same effect as that of the coil component 1a of the first embodiment can be obtained.

<Third Embodiment>
A coil component 1c according to a third embodiment of the present invention will be described with reference to FIGS. 7 is a plan view of the coil component 1c, FIG. 8 is a diagram for explaining the wiring patterns 6a and 6b, and FIG. 7A is a plan view of the coil component 1c in a state where the upper wiring pattern 6a is removed. FIG. 5B is a plan view of the coil component 1c with the lower wiring pattern 6b removed.

The coil component 1c according to this embodiment differs from the coil component 1a of the first embodiment described with reference to FIGS. 1 to 3 in that each of the upper and lower wirings is as shown in FIGS. The patterns 6a and 6b are different in shape. Since the other configuration is the same as that of the coil component 1a of the first embodiment, description thereof is omitted by attaching the same reference numerals.

In this case, each lower wiring pattern 6b is formed in a straight line having an equal line width from one end to the other end (see FIG. 8A). These lower wiring patterns 6b are arranged so as to be orthogonal to the central axis CA, similarly to the coil component 1a of the first embodiment.

Each upper wiring pattern 6a has a linear main body 6a1 substantially orthogonal to the central axis CA, and a bent portion 6a2 whose one end is connected to the main body 6a1 and bends (see FIG. 8B). In this embodiment, the line width of each main body 6a1 is formed to be substantially the same as the line width of the paired lower wiring pattern 6b, and is arranged so as to overlap the lower wiring pattern 6b in plan view. The And one end of each main-body part 6a1 is connected to the end (inner peripheral side) of the lower wiring pattern 6b which makes a pair by the inner side metal pin 5a.

The other end of each bent portion 6a2 is disposed so as to overlap with the other end of the lower wiring pattern 6b adjacent to the pair of lower wiring patterns 6b in a plan view. It is connected to the wiring pattern 6b (the adjacent lower wiring pattern 6b).

According to this configuration, each lower wiring pattern 6b and the main body portion 6a1 of each upper wiring pattern 6a are arranged so as to be orthogonal to the central axis CA, so that the number of turns of the coil electrode 4 can be easily increased. . Further, since each upper wiring pattern 6a has a bent portion 6a2, in order to spirally surround the coil core 3 around the coil electrode 4 with the coil electrode 4, columnar inner and outer metal pins 5a and 5b are erected on the insulating layer 2. A simple configuration can be adopted.

<Fourth embodiment>
A coil component 1d according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a plan view of the coil component 1d.

The coil component 1d according to this embodiment differs from the coil component 1a of the first embodiment described with reference to FIGS. 1 to 3 in that the shape of the coil core 3 is different as shown in FIG. . Since the other configuration is the same as that of the coil component 1a of the first embodiment, description thereof is omitted by attaching the same reference numerals.

In this case, the coil core 3 includes two linear portions 3a1 and 3a2 arranged in parallel, a first curved portion 3b having a semicircular shape in plan view that connects one ends of both linear portions 3a1 and 3a2, and both linear portions 3a1 and 3a1. It is formed in an oval shape composed of a second curved portion 3c having a semicircular shape in plan view that connects the other ends of 3a2.

Here, among the lower wiring patterns 6b, those arranged on the first and second curved portions 3b, 3c of the coil core 3 are the coil electrodes 4 of the coil core 3 as in the coil component 1a of the first embodiment. Is arranged so as to be substantially orthogonal to the central axis CA1 (see the one-dot chain line in FIG. 9) parallel to the winding axis direction in plan view (see FIG. 3A).

Further, among the upper wiring patterns 6a, those arranged on the first and second curved portions 3b and 3c of the coil core 3 also have the upper wiring pattern in a plan view, like the coil component 1a of the first embodiment. 6a intersects with both the outer overlapping line OL formed by the overlap of the outer periphery circle of the coil core 3 and the inner overlap line IL formed by the overlap of the inner periphery circle, and tangent to the inner periphery circle of the coil core 3 It arrange | positions so that the orthogonal virtual line VL can be drawn (refer FIG.3 (b)).

Of the lower wiring patterns 6b, those arranged in the straight portions 3a1 and 3a2 are arranged so as to be substantially orthogonal (perpendicular to the central axis CA1) to the straight portions 3a1 and 3a2 in plan view.

Further, among the upper wiring patterns 6a, those arranged in the straight portions 3a1 and 3a2 are caused by the overlapping of the outer overlapping line OL1 formed by the overlapping of the upper wiring pattern 6a and the outer periphery of the coil core 3 and the inner periphery. Arranged so that an imaginary straight line VL1 intersecting both of the formed inner overlapping lines IL1 and perpendicular to the straight portions 3a1 and 3a2 can be drawn. Note that the lower wiring pattern 6b disposed in the straight portions 3a1 and 3a2 may also be disposed with an angle shifted from a direction orthogonal to the straight portions 3a1 and 3a2 within a range where the virtual straight line VL1 can be drawn.

According to this configuration, even when the coil core 3 has an oval shape, the same effect as that of the coil component 1a of the first embodiment can be obtained.

The present invention is not limited to the above-described embodiments, and various modifications other than those described above can be made without departing from the spirit of the invention. For example, the insulating layer 2 may be formed of a ceramic material, for example.

Further, protective films for protecting the upper and lower wiring patterns 6a and 6b may be provided on the upper and lower surfaces of the insulating layer 2. In this case, examples of the material for forming the protective film include an epoxy resin and a polyimide resin.

Also, the present invention can be widely applied to various coil components including an insulating layer in which a coil core is embedded and a coil electrode wound around the coil core.

DESCRIPTION OF SYMBOLS 1a-1d Coil components 2 Insulating layer 3 Coil core 3a1, 3a2 Straight line part 3b 1st curve part 3c 2nd curve part 4 Coil electrode 5a Inner metal pin (one side conductor)
5b Outer metal pin (other side conductor)
6a Upper wiring pattern (second wiring pattern)
6b Lower wiring pattern (first wiring pattern)
6a1 Main body 6a2 Bent part IL, IL1 Inner overlap line OL, OL1 Outer overlap line VL, VL1 Virtual straight line CA, CA1 Central axis

Claims

An insulating layer with an annular coil core embedded therein;
A coil electrode wound around the coil core,
The coil electrode is
A plurality of first wiring patterns having one end disposed on the inner peripheral side of the coil core and the other end disposed on the outer peripheral side of the coil core, and arranged on one main surface of the insulating layer;
One end is disposed on the inner peripheral side of the coil core and the other end is disposed on the outer peripheral side of the coil core, and arranged on the other main surface of the insulating layer so as to form a plurality of pairs with each of the first wiring patterns. A plurality of second wiring patterns,
A plurality of one-side conductors arranged on the inner peripheral side of the coil core and connecting one end of each of the first wiring patterns and one end of the second wiring pattern paired with the first wiring pattern; ,
The other end of each of the first wiring patterns disposed on the outer peripheral side of the coil core and the other end of the second wiring pattern adjacent to the second wiring pattern paired with the first wiring pattern. A plurality of other conductors connecting the
Each of the first and second wiring patterns is
In plan view, it intersects both the outer overlapping line formed by the overlapping of the wiring pattern and the outer peripheral circle of the coil core and the inner overlapping line formed by the overlapping of the wiring pattern and the inner peripheral circle of the coil core, The coil component is arranged so that a virtual straight line orthogonal to a tangent to the inner circumference of the coil core can be drawn.
2. The coil component according to claim 1, wherein each of the first wiring patterns is arranged to be orthogonal to a central axis parallel to a winding axis direction of the coil electrode in a plan view of the coil core. .
Both each said 1st wiring pattern and each said 2nd wiring pattern are arrange | positioned so that it may orthogonally cross in a planar view with the central axis parallel to the winding axis direction of the said coil electrode of the said coil core. The coil component according to claim 1.
4. Each of the first and second wiring patterns is arranged so as to overlap the virtual straight line in plan view from the one end to the other end. The coil component described.
One of each of the first wiring patterns and each of the second wiring patterns includes a linear main body portion that is substantially orthogonal to the central axis in plan view, and a bent portion that is bent with one end connected to the main body portion. The coil component according to claim 3, wherein:
An insulating layer with an annular coil core embedded therein;
A coil electrode wound around the coil core,
The coil electrode is
A plurality of first wiring patterns having one end disposed on the inner peripheral side of the coil core and the other end disposed on the outer peripheral side of the coil core, and arranged on one main surface of the insulating layer;
One end is disposed on the inner peripheral side of the coil core and the other end is disposed on the outer peripheral side of the coil core, and arranged on the other main surface of the insulating layer so as to form a plurality of pairs with each of the first wiring patterns. A plurality of second wiring patterns,
A plurality of one-side conductors arranged on the inner peripheral side of the coil core and connecting one end of each of the first wiring patterns and one end of the second wiring pattern paired with the first wiring pattern; ,
The other end of each of the first wiring patterns disposed on the outer peripheral side of the coil core and the other end of the second wiring pattern adjacent to the second wiring pattern paired with the first wiring pattern. A plurality of other conductors connecting the
The coil core includes two linear portions arranged in parallel, a first curved portion in a plan view semicircular shape that connects one ends of the two straight portions, and a semicircle in plan view that connects the other ends of the two straight portions. Formed in an oval shape composed of a second curved portion having a shape,
Each of the first and second wiring patterns arranged in both the straight portions is
In plan view, it intersects both the outer overlapping line formed by the overlap of the wiring pattern and the outer periphery of the coil core and the inner overlapping line formed by the overlap of the wiring pattern and the inner periphery of the coil core, and Arranged so that a virtual straight line perpendicular to the straight part can be drawn,
Each of the first and second wiring patterns arranged in the first and second curved portions is respectively
In plan view, it intersects both the outer overlapping line formed by the overlapping of the wiring pattern and the outer peripheral circle of the coil core and the inner overlapping line formed by the overlapping of the wiring pattern and the inner peripheral circle of the coil core, The coil component is arranged so that a virtual straight line orthogonal to a tangent to the inner circumference of the coil core can be drawn.
The coil component according to any one of claims 1 to 6, wherein each one-side conductor and each other-side conductor are formed of metal pins.