JP2016115895A - Coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce local heating of a coil electrode and to suppress impedance mismatch, in a coil component including an insulation layer where a coil core is embedded, and a coil electrode wound around the coil core.SOLUTION: A coil electrode 4 of a coil component 1a has a plurality of upper wiring patterns 6a arranged on the upper surface of an insulation layer 2, a plurality of lower wiring patterns 6b arranged on the lower surface of the insulation layer 2 so as to form a plurality of pairs with the upper wiring patterns 6a, respectively, a plurality of inner metal pins 5a for connecting one ends of the upper wiring patterns 6a and one ends of the lower wiring patterns 6b to be paired therewith, and a plurality of outer metal pins 5b for connecting the other ends of the upper wiring patterns 6a and the other ends of the lower wiring patterns 6b adjacent to the lower wiring patterns 6b to be paired with the upper wiring patterns 6a. The upper and lower wiring patterns 6a, 6b have the same shape.SELECTED DRAWING: Figure 2

Description

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 a problem in reducing the manufacturing cost of the coil component.

  Therefore, conventionally, coil parts that do not require manual winding work have been proposed. For example, the coil component 100 described in Patent Document 1 shown in FIG. 7 includes an insulating layer and a coil electrode 101 formed on the insulating layer. Specifically, a power supply layer is provided on the upper surface of the insulating layer, and a ground layer is provided on the lower surface. Here, a plurality of upper wiring patterns 101a are formed in the power supply layer. Each upper wiring pattern 101a is arranged radially and equidistantly around a certain point. In the ground layer, the same number of lower wiring patterns 101b as the upper wiring patterns 101a are formed. Then, the center side ends and the outside ends of the upper and lower wiring patterns 101a and 101b are connected to each other by any of a plurality of through-hole conductors 101c provided so as to penetrate the insulating layer. A toroidal coil is formed in the layer. According to such a configuration of the coil electrode 101, manual work is not required for winding the coil electrode, so that an inexpensive coil component can be manufactured.

Japanese Patent Laid-Open No. 10-321973 (see paragraphs 0029 to 0031, FIG. 1, etc.)

  However, in the conventional coil electrode 101, the upper wiring pattern 101a and the lower wiring pattern 101b are different in shape such as length and area. In this case, since the wiring resistance of the upper wiring pattern 101a and the wiring resistance of the lower wiring pattern 101b are different, there is a possibility that heat is generated locally in the coil electrode 101. Further, when the shapes of the upper and lower wiring patterns 101a and 101b connected by the through-hole conductor 101c are different, impedance mismatch may occur.

  The present invention has been made in view of the above problems, and in a coil component including an insulating layer in which a coil core is embedded and a coil electrode wound around the coil core, local heat generation of the coil electrode is achieved. The purpose is to reduce the impedance and the impedance mismatch.

In order to achieve the above object, a coil component of the present invention includes an insulating layer in which a coil core is embedded, and a coil electrode wound around the coil core, and the coil electrode has one end of the coil core. A plurality of first wiring patterns arranged on one side and the other end arranged on the other side of the coil core, arranged in the winding axis direction of the coil electrode on one main surface of the insulating layer, and one end The coil core is disposed on one side of the coil core and the other end is disposed on the other side of the coil core, and is wound 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 arranged in the axial direction, one end of each of the first wiring patterns arranged on one side of the coil core, and the first wiring pattern forming a pair with the first wiring pattern A plurality of one-side conductor connecting of one end of the wiring pattern,
The second wiring pattern disposed on the other side of the coil core and adjacent to the other end of each of the first wiring patterns and a predetermined side of the second wiring pattern that forms a pair with the first wiring pattern A plurality of other conductors connecting the other end of the first wiring pattern, and the first wiring pattern and the second wiring pattern are formed in the same shape.

  According to this configuration, each first wiring pattern and each second wiring pattern are formed in the same shape, so that the wiring resistance of each wiring pattern can be made the same. Therefore, it is possible to reduce local heat generation due to a change in wiring resistance in the coil electrode. In addition, impedance mismatch between the first wiring pattern and the second wiring pattern connected to the one side or the other side conductor can be suppressed.

  The first wiring patterns may be arranged at equal intervals, and the second wiring patterns may be arranged at equal intervals. If it does in this way, since each one side conductor and each other side conductor can be formed in the same length, the wiring resistance of each one side and the other side conductor can be made the same value.

  Each of the first and second wiring patterns may be arranged so as to be orthogonal to the winding axis direction in plan view. In this case, for example, any one of the first and second wiring patterns is arranged so as to be orthogonal to the winding axis direction, and the other is inclined with respect to the direction orthogonal to the winding axis direction. The number of turns of the coil electrode can be easily increased as compared with the case where each of the coil electrodes is disposed.

  Each of the first wiring patterns has a pair so as to have a portion overlapping the second wiring pattern forming a pair and each of the second wiring patterns adjacent to the predetermined side in plan view. The first wiring patterns are arranged so as to be shifted in parallel to the winding axis direction in plan view with respect to the second wiring pattern formed, and each of the one side conductors forms a pair in the first wiring pattern of the connection destination The second conductor pattern is disposed in a portion overlapping with the second wiring pattern, and each of the other side conductors overlaps with the second wiring pattern adjacent to the predetermined side in the first wiring pattern to be connected. May be arranged.

  According to this configuration, the first and second wiring patterns can be connected using, for example, columnar via conductors or metal pins as the respective one side and other side conductors, so that the coil component is manufactured at low cost. be able to. Further, when the first wiring patterns are arranged at equal intervals and the second wiring patterns are also arranged at equal intervals, each first wiring pattern overlaps with the second wiring pattern in plan view. Can be made equal in area. In this case, since the variation in stray capacitance generated between the first wiring pattern and the second wiring pattern can be reduced, the characteristic variation of the coil electrode can be suppressed.

  Each of the first wiring patterns includes an area of a portion overlapping with the second wiring pattern forming a pair in plan view, and a portion of the portion overlapping with the second wiring pattern adjacent to the predetermined side in plan view. The area may be equal. In this case, it is possible to reduce the variation in stray capacitance that occurs between the first wiring pattern and the second wiring pattern.

  The coil core includes an insulating layer in which an annular coil core is embedded, and a coil electrode wound around the coil core. The coil core includes two linear portions arranged in parallel and one ends of the linear portions. Are formed in an oval shape composed of a first curved portion in a plan view semicircular shape connecting the two and a second curved portion in a semicircular shape in plan view connecting the other ends of the two linear portions, and the coil electrode is , 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 a plurality of first elements arranged in the winding axis direction of the coil electrode on one main surface of the insulating layer. One end of the insulating layer 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 a plurality of pairs are formed with each of the first wiring patterns. Winding of the coil electrode on the other main surface A plurality of second wiring patterns arranged in a direction, the second wiring patterns arranged on the inner peripheral side of the coil core, and one end of each of the first wiring patterns, and the second wiring pattern forming a pair with the first wiring pattern A plurality of inner conductors that connect one end of the wiring pattern, and the second end that is disposed on the outer peripheral side of the coil core and that forms a pair with the other end of each of the first wiring patterns and the first wiring pattern. A plurality of outer conductors connecting the other end of the second wiring pattern adjacent to a predetermined side of the wiring pattern, and each of the first wiring patterns arranged on both the straight portions of the coil core, and Each of the second wiring patterns is formed in the same shape, and each of the first wiring pattern and each of the second wiring patterns arranged on the first curved portion and the second curved portion of the coil core Deviation may also be formed in the same shape.

  According to this configuration, the wiring resistance of each wiring pattern arranged in both linear portions of the coil core can be made the same size, and the wiring resistance of each wiring pattern arranged in both curved portions of the coil core can be made the same size. can do. Therefore, local heat generation due to the change of the wiring resistance in the coil electrode can be suppressed. In addition, impedance mismatch between the first wiring pattern and the second wiring pattern connected to the one side or the other side conductor can be suppressed.

  Each of the first wiring patterns has a pair so as to have a portion overlapping the second wiring pattern forming a pair and each of the second wiring patterns adjacent to the predetermined side in plan view. The second wiring pattern is arranged so as to be shifted to the predetermined side in a plan view, and each of the inner conductors is connected to the second wiring pattern forming a pair in the connection destination first wiring pattern. Each of the outer conductors may be disposed in an overlapping portion with the second wiring pattern adjacent to the predetermined side in the first wiring pattern to be connected.

  According to this configuration, the first and second wiring patterns can be connected using, for example, columnar via conductors or metal pins as the respective one side and other side conductors, so that the coil component is manufactured at low cost. be able to. Further, when the first wiring patterns are arranged at equal intervals and the second wiring patterns are also arranged at equal intervals, each first wiring pattern overlaps with the second wiring pattern in plan view. Can be made equal in area. In this case, since the variation in stray capacitance that occurs between the first wiring pattern and the second wiring pattern can be reduced, variation in the characteristics of the coil electrode can be suppressed.

  According to the present invention, since each first wiring pattern and each second wiring pattern are formed in the same shape, the wiring resistance of each wiring pattern can be made equal. Therefore, it is possible to reduce local heat generation due to a change in wiring resistance in the coil electrode. In addition, impedance mismatch between the first wiring pattern and the second wiring pattern connected to the one side or the other side conductor can be suppressed.

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 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 top view of 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 lower wiring pattern 6b removed, and FIG. 3B is a plan view of the coil component 1a with the upper wiring pattern 6a removed.

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

  The insulating layer 2 is formed of a resin such as an epoxy resin, for example, 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 is formed in the annular | circular shape.

  The coil electrode 4 is spirally wound around the annular coil core 3 and is formed on the upper surface of the insulating layer 2 (corresponding to “one main surface of the insulating layer” of the present invention). A plurality of lower wiring patterns 6b formed on the lower 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 the wiring patterns 6a and the respective upper wiring patterns 6a. And a plurality of inner metal pins 5a and outer metal pins 5b that connect a predetermined upper wiring pattern 6a and a lower wiring pattern 6b.

  Each upper wiring pattern 6 a is arranged in the winding axis direction of the coil electrode 4 (circumferential direction of the coil core 3) with one end disposed on the inner peripheral side of the coil core 3 and the other end disposed on the outer peripheral side of the coil core 3. Is done. Each lower wiring pattern 6b 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 in the same manner as each upper wiring pattern 6a. In this embodiment, each of the upper and lower wiring patterns 6a and 6b is formed in a tapered shape as it goes from the outer peripheral side to the inner peripheral side.

  Each of the upper and lower wiring patterns 6a and 6b is laminated with a base electrode 7 formed by screen printing using a conductive paste containing a metal such as Cu or Ag, and the base electrode 7 is laminated by, for example, Cu plating. It is formed in a two-layer structure with the surface electrode 8. Each upper and lower wiring pattern 6a, 6b may have a single layer structure. In this case, similarly to the base electrode 7, it can be formed by screen printing using a conductive paste containing a metal such as Cu or Ag. Here, the above-described upper wiring pattern 6a corresponds to a “first wiring pattern” of the present invention, and the lower wiring pattern 6b corresponds to a “second wiring pattern” of the present invention.

  Each inner metal pin 5a connects one end of each upper wiring pattern 6a and one end of the lower wiring pattern 6b paired with the upper wiring pattern 6a, and stands in the thickness direction of the insulating layer 2 respectively. It is arranged along the inner peripheral surface of the coil core 3 in the installed state.

  Each outer metal pin 5b has a lower side adjacent to the other end of each upper wiring pattern 6a and a predetermined side (counterclockwise in this embodiment) of the lower wiring pattern 6b paired with the upper wiring pattern 6a. The other end of the wiring pattern 6b is connected. Each outer metal pin 5 b is arranged along the outer peripheral surface of the coil core 3 in a state of being erected in the thickness direction of the insulating layer 2. 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.

  The upper end surfaces of the inner metal pins 5a and the outer metal pins 5b are exposed from the upper surface of the insulating layer 2, and the lower end surfaces of the inner metal pins 5a and the outer metal pins 5b are lower surfaces of the insulating layer 2. It is provided exposed from. These metal pins 5a and 5b are formed of a metal material generally employed 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 with the substantially same thickness and length.

  By the way, if the upper wiring pattern 6a and the lower wiring pattern 6b connected by one metal pin 5a and 5b are different in shape, local heat may be generated due to the difference in wiring resistance when the coil electrode 4 is energized. is there. In addition, impedance mismatch may occur between the wiring patterns 6a and 6b. Therefore, in this embodiment, the above-described local heat generation and impedance mismatch can be reduced.

  In addition, since the conductive paste for forming the upper and lower wiring patterns 6a and 6b is formed by mixing a filler formed of Cu or Ag and an organic solvent, the metal pins 5a and 5b The specific resistance is lower than that of the upper and lower wiring patterns 6a and 6b. When the wiring resistance of each of the upper and lower wiring patterns 6a and 6b is high, the coil characteristics (for example, Q value) of the coil electrode 4 are lowered. Therefore, in this embodiment, by increasing the area of each upper wiring pattern 6a and each lower wiring pattern 6b, the heat radiation characteristics of heat generated from the coil electrode 4 are improved, and the wiring resistance is suppressed to reduce the coil. It is comprised so that the characteristic can be improved.

  Specifically, as shown in FIG. 3, the upper and lower wiring patterns 6a and 6b are both formed in substantially the same shape. The upper wiring patterns 6a are arranged at equal intervals, and the lower wiring patterns 6b are also arranged at equal intervals (equal pitch). Furthermore, in this embodiment, the intervals between the upper wiring patterns 6a and the intervals between the lower wiring patterns 6b are designed to be approximately the same size. It should be noted that the above-mentioned “the upper and lower wiring patterns 6a and 6b are substantially the same shape” means that both the upper and lower wiring patterns 6a and 6b have completely the same shape and manufacturing variations. And the case where the shape is slightly different due to such errors. Similarly, the above “equal interval” includes errors such as manufacturing variations.

  Each upper wiring pattern 6a and each lower wiring pattern 6b are arranged so as to be orthogonal to a central axis CA parallel to the winding axis direction of the coil core 3 in plan view. Here, “perpendicular to the central axis CA” means that a straight line CL passing through only the center point in the width direction of the wiring patterns 6a and 6b is perpendicular to a tangent line at a point where the central axis CA intersects the straight line CL. However, this includes the case where the angle is slightly deviated from the direction perpendicular to the central axis CA due to errors such as manufacturing variations.

  In a plan view, in an area sandwiched between an outer circle formed by arranging the outer metal pins 5b and an inner circle formed by arranging the inner metal pins 5a, As shown in FIG. 3A, the upper wiring pattern 6a is formed except for a predetermined amount of gap between the adjacent upper wiring patterns 6a, and the circumferential width of each upper wiring pattern 6a is increased. Is planned. The same applies to the lower wiring patterns 6b (see FIG. 3B).

  Here, as shown in FIG. 2, each upper wiring pattern 6a has a pair of a lower wiring pattern 6b and a lower wiring pattern 6b adjacent to the predetermined side (counterclockwise direction) in plan view. The lower wiring patterns 6b forming a pair are arranged so as to be shifted to the predetermined side in plan view so as to have overlapping portions. In this embodiment, each upper wiring pattern 6a is moved in parallel with the lower wiring pattern 6b forming a pair by a half pitch (about half the pattern width) in the circumferential direction (winding axis direction). They are offset. In this case, each upper wiring pattern 6a has an area of a portion overlapping the paired lower wiring pattern 6b in plan view, and the lower wiring pattern 6b adjacent to the predetermined side of the lower wiring pattern 6b in plan view. The area of the overlapping part becomes equal.

  The amount of deviation with respect to the lower wiring pattern 6b of each upper wiring pattern 6a is not limited to the above-mentioned approximately half pitch, but a pair of the lower wiring pattern 6b and the lower wiring pattern 6b adjacent to the predetermined side thereof. As long as both have a portion overlapping in plan view, it can be changed as appropriate.

  Each inner metal pin 5a is arranged at a portion of the connection destination upper wiring pattern 6a that overlaps the paired lower wiring pattern 6b, and each outer metal pin 5b is connected to the connection destination upper wiring pattern 6a. The lower wiring pattern 6b forming a pair is disposed in a portion overlapping the lower wiring pattern 6b adjacent to the predetermined side (counterclockwise direction). In other words, the inner metal pin 5a is disposed on a portion of the upper wiring pattern 6a that overlaps the lower wiring pattern 6b on one side (clockwise side) with respect to the straight line CL, and the other side (counterclockwise) of the upper wiring pattern 6a with respect to the straight line CL. The outer metal pin 5b is arranged at a portion overlapping the lower wiring pattern 6b on the direction side.

  In this embodiment, each of the inner and outer metal pins 5a and 5b is formed in a columnar shape, but may be formed in a prismatic shape, for example. Further, the inner and outer metal pins 5a and 5b may be formed of columnar conductors such as via conductors.

(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, after mounting the transfer plate on the resin sheet so that the lower end surfaces of the metal pins 5a and 5b are in contact with the resin layer, the resin of 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, each upper wiring pattern 6a is formed on the upper surface of the insulating layer 2, and each lower wiring pattern 6b is 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, since each upper wiring pattern 6a and each lower wiring pattern 6b are formed in the same shape, the wiring resistance of each wiring pattern 6a, 6b is made the same. Can do. Therefore, local heat generation due to the change in the wiring resistance in the coil electrode 4 can be reduced. Further, impedance mismatch between the upper wiring pattern 6a and the lower wiring pattern 6b connected to each of the metal pins 5a and 5b can be suppressed.

  Further, each metal pin 5a, 5b is disposed in a portion where the upper wiring pattern 6a and the lower wiring pattern 6b overlap in a plan view, thereby connecting the upper wiring pattern 6a and the lower wiring pattern 6b. For example, columnar conductors such as metal pins 5a and 5b and via conductors can be used.

  If the upper wiring patterns 6a are arranged at equal intervals and the lower wiring patterns 6b are also arranged at equal intervals, the upper wiring patterns 6a are shifted in the circumferential direction of the coil core 3 with respect to the lower wiring patterns 6b. When arranged, each upper wiring pattern 6a can have the same area in a region overlapping with the lower wiring pattern 6b in plan view. In this case, the variation in stray capacitance generated between the wiring patterns 6a and 6b can be reduced, so that the variation in characteristics of the coil electrode 4 can be suppressed. In addition, when the upper wiring patterns 6a are arranged at equal intervals and the lower wiring patterns 6b are also arranged at equal intervals, the lengths of the metal pins 5a and 5b can be made the same length. The wiring resistance of the metal pins 5a and 5b can be set to the same value.

  In addition, each of the upper and lower wiring patterns 6a and 6b is disposed so as to be orthogonal to the central axis CA of the coil core 3 in plan view, so that, for example, each upper wiring pattern 6a is orthogonal to the central axis CA. The number of turns of the coil electrode 4 can be easily increased as compared with the case where each lower wiring pattern 6b is disposed obliquely with respect to the direction orthogonal to the central axis CA.

  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.

Second Embodiment
A coil component 1b according to a second embodiment of the present invention will be described with reference to FIGS. 4 is a plan view of the coil component 1b, FIG. 5A is a plan view of the coil component 1b with the lower wiring patterns 60b and 61b removed, and FIG. 5B is a plan view of the upper wiring patterns 60a and 61a. It is a top view of the coil component 1b of the state 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 the coil core 3 is parallel to each other as shown in FIGS. Two linear portions 3a arranged, a first curved semicircular shape 3b connecting one end of both linear portions 3a, and a second semicircular second shape connecting the other ends of both linear portions 3a. It is formed in an oval shape constituted by the curved portion 3c, wiring patterns 60a and 60b arranged in the straight portion 3a, and wiring patterns 61a and 61b arranged in the curved portions 3b and 3c. Is different. Since the other configuration is the same as that of the coil component 1b of the first embodiment, description thereof is omitted by attaching the same reference numerals.

  In this case, each of the upper wiring patterns 60a and the lower wiring patterns 60b arranged in both the straight portions 3a of the coil core 3 is formed in a rectangular shape in plan view with the same shape. Each of the upper wiring patterns 61a and the lower wiring patterns 61b arranged on the two curved portions 3b and 3b of the coil core 3 has substantially the same shape, and the outer peripheral side, like the wiring patterns 6a and 6b of the first embodiment. It is formed in a tapered shape as it goes from the inner circumference side to the inner circumference side.

  Further, each of the upper wiring patterns 60a and 61a is respectively paired with the lower wiring patterns 60b and 61b and the lower wiring patterns 60b and 61b adjacent to the predetermined side (counterclockwise direction). The lower wiring patterns 60b and 61b forming a pair are arranged so as to be shifted counterclockwise in a plan view so as to have a portion overlapping with the plan view.

  According to this configuration, the upper and lower wiring patterns 60a and 60b arranged in the straight line portion 3a have the same shape, and the upper and lower wiring patterns arranged in the first and second curved portions 3b and 3c. Since both the patterns 61a and 61b have the same shape, local heat generation of the coil electrode 4 can be suppressed.

  The wiring patterns 60a and 60b of the straight line portion 3a are rectangular in plan view, and the wiring patterns 61a and 61b of the curved portions 3b and 3c are formed in a tapered shape from the outer peripheral side toward the inner peripheral side. By doing so, each wiring pattern 60a, 60b, 61a, 61b can be densely arranged in the circumferential direction of the coil core 3 (increasing the area of the wiring patterns 60a, 60b, 61a, 61b).

<Third Embodiment>
A coil component 1c according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a plan view of the coil component 1c.

  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 the shape of the coil core 3 is different as shown in FIG. The shape of each wiring pattern 6a, 6b is different. 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 is formed in a rod shape, and each of the upper and lower wiring patterns 6a and 6b is formed in a long rectangular shape with the same shape. Further, on one side of the coil core 3 (lower side of the coil core 3 in FIG. 6), a plurality of one-side metal pins 50a are arranged along the longitudinal direction of the coil core 3, and the other side (upper side of the coil core 3 in FIG. 6). ), The plurality of other metal pins 50 b are arranged along the longitudinal direction of the coil core 3. Here, each one side metal pin 50a corresponds to “one side conductor” of the present invention, and each other side metal pin 50b corresponds to “other side conductor” of the present invention.

  Each of the upper and lower wiring patterns 6 a and 6 b has one end portion in the longitudinal direction disposed on one side of the coil core 3 and the other end portion in the longitudinal direction disposed on the other side of the coil core 3. . Here, each wiring pattern 6a, 6b is arranged so as to be orthogonal to the central axis CA1 of the coil core 3 parallel to the winding axis direction of the coil electrode 4 as in the first embodiment.

  According to this structure, when the coil core 3 is rod-shaped, the same effect as 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, 60a, 61a, 6b, 60b, 61b 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.

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

DESCRIPTION OF SYMBOLS 1a-1c Coil components 2 Insulating layer 3 Coil core 3a Linear 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, 60a, 61a Upper wiring pattern (first wiring pattern)
6b, 60b, 61b Lower wiring pattern (second wiring pattern)
50a One side metal pin (one side conductor)
50b The other side metal pin (the other side conductor)

Claims (7)

An insulating layer with a coil core embedded therein;
A coil electrode wound around the coil core,
The coil electrode is
A plurality of first wirings having one end disposed on one side of the coil core and the other end disposed on the other side of the coil core and arranged in the winding axis direction of the coil electrode on one main surface of the insulating layer With patterns,
One end is disposed on one side of the coil core and the other end is disposed on the other side of the coil core, and the first main surface of the insulating layer forms a plurality of pairs with each of the first wiring patterns. A plurality of second wiring patterns arranged in the winding axis direction;
A plurality of one-side conductors arranged on one 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 second wiring pattern disposed on the other side of the coil core and adjacent to the other end of each of the first wiring patterns and a predetermined side of the second wiring pattern that forms a pair with the first wiring pattern A plurality of other conductors connecting the other end of the
Each of the first wiring patterns and each of the second wiring patterns are formed in the same shape.   2. The coil component according to claim 1, wherein the first wiring patterns are arranged at equal intervals, and the second wiring patterns are arranged at equal intervals.   3. The coil component according to claim 1, wherein each of the first and second wiring patterns is disposed so as to be orthogonal to the winding axis direction in a plan view. Each of the first wiring patterns is paired so as to have a portion overlapping the second wiring pattern and the second wiring pattern adjacent to the predetermined side of the first wiring pattern in plan view. The second wiring pattern is displaced so as to translate in the winding axis direction in plan view,
Each of the one side conductors is disposed in a portion overlapping with the second wiring pattern forming a pair in the first wiring pattern of the connection destination,
4. Each of the other-side conductors is disposed in a portion overlapping the second wiring pattern adjacent to the predetermined side in the first wiring pattern to be connected. The coil component according to crab.   Each of the first wiring patterns includes an area of a portion overlapping with the second wiring pattern forming a pair in a plan view, and an area of a portion overlapping with the second wiring pattern adjacent to the predetermined side in a plan view. The coil parts according to claim 4, wherein the two are equal. An insulating layer with an annular coil core embedded therein;
A coil electrode wound around the coil core,
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,
The coil electrode is
One end is disposed on the inner peripheral side of the coil core, the other end is disposed on the outer peripheral side of the coil core, and a plurality of first electrodes arranged in the winding axis direction of the coil electrode on one main surface of the insulating layer. A wiring pattern;
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 the first main surface of the insulating layer is formed on the other main surface of the insulating layer so as to form a plurality of pairs. A plurality of second wiring patterns arranged in the winding axis direction of the coil electrode;
A plurality of inner conductors that are arranged on the inner peripheral side of the coil core and 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 wiring pattern disposed on the outer peripheral side of the coil core and adjacent to the other end of each of the first wiring patterns and a predetermined side of the second wiring pattern that forms a pair with the first wiring pattern A plurality of outer conductors connecting the other end of the
Each of the first wiring patterns and the second wiring patterns arranged in the both linear portions of the coil core are formed in the same shape,
The coil component, wherein each of the first wiring patterns and the second wiring patterns arranged in the first curved portion and the second curved portion of the coil core are formed in the same shape. . Each of the first wiring patterns is paired so as to have a portion overlapping the second wiring pattern and the second wiring pattern adjacent to the predetermined side of the first wiring pattern in plan view. The second wiring pattern is arranged so as to be shifted to the predetermined side in plan view,
Each of the inner conductors is disposed in a portion overlapping with the second wiring pattern forming a pair in the first wiring pattern of the connection destination,
7. The coil component according to claim 6, wherein each of the outer conductors is disposed in a portion overlapping with the second wiring pattern adjacent to the predetermined side in the first wiring pattern of the connection destination. .

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