JP2005191256A - Coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component capable of having a plurality of functions. <P>SOLUTION: A vertically wound coil 2 having the coil central axis O<SB>Z</SB>in the vertical direction, and a horizontally wound coil 3 having the coil central axis O<SB>Y</SB>in the horizontal direction, are integrated into a coil component 1. A coil 8 of the vertically wound coil portion 2 and a coil 14 of the horizontally wound coil 3 are electrically connected in series. Since the coil 8 and the coil 14 can each operate as an independent coil, the coil component 1 has impedance characteristics for both the vertically wound coil 2 and horizontally wound coil 3. It is possible, for example, to operate the vertically wound coil 2 for the purpose of waveform shaping, and the horizontally wound coil 3 for the purpose of signal noise rejection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coil component incorporated in a circuit for use such as signal noise removal.

  As one of the coil parts, for example, there is a coil part called a vertical winding type as shown in an image sectional view of FIG. 7A and a schematic exploded view of FIG. 7B. In the coil component 30, for example, insulating magnetic layers 31 and coil forming conductor patterns 32 are alternately stacked and integrated in the vertical direction. All of the coil forming conductor patterns 32 (32a to 32f) are electrically connected in series by a through hole 33 formed in the magnetic layer 31 to form a coil 34 having a longitudinal central axis O. .

  External connection electrodes 36 (36A, 36B) are respectively formed on the side surfaces of the laminated body 35 of the magnetic layer 31 and the coil forming conductor pattern 32 at portions facing each other. One end side of the coil 34 (coil forming conductor pattern 32a in the example of FIG. 7) is connected to the external connection electrode 36A, and the other end side of the coil 34 (coil formation in the example of FIG. 7) is connected to the external connection electrode 36B. Conductor pattern 32f) is connected. The coil 34 can be electrically connected to the outside by the external connection electrodes 36A and 36B.

  The vertically wound type coil component 30 has the above-described configuration. Next, a configuration example of another type of coil component will be shown. For example, there is a coil component called a horizontal winding type as shown in the image sectional view of FIG. 8 (see, for example, Patent Document 1). In the coil component 38 of FIG. 8, the laminated body 35 constituting the vertically wound type coil component 30 is arranged in an orientation in which the direction of the central axis O of the coil 34 is horizontal, and the horizontal laminated bodies 35 are mutually arranged. It has a configuration in which external connection electrodes 36A and 36B are formed on opposite side portions.

  That is, in the coil component 38, the magnetic layers 31 and the coil forming conductor patterns 32 are alternately arranged in the horizontal direction and integrated, and all the coil forming conductor patterns 32 are formed in the magnetic layer 31. A coil 34 having a lateral central axis O is formed by being electrically connected in series through the formed through hole. External connection electrodes 36 </ b> A and 36 </ b> B are formed on side surfaces of the laminated body 35 including the magnetic layer 31 and the coil forming conductor pattern 32 that face each other. One end side of the coil 34 is connected to the external connection electrode 36A, the other end side of the coil 34 is connected to the external connection electrode 36B, and the coil 34 is connected to the outside by the external connection electrodes 36A and 36B. It is possible.

  Furthermore, an example of another coil component is shown. FIG. 9A shows an image cross-sectional view of a horizontal winding type coil component, and FIG. 9B schematically shows an exploded view of the horizontal winding type coil component (for example, Patent Documents). 2). In this specification, in order to distinguish between the horizontally wound type coil component of FIG. 8 and the horizontally wound type coil component of FIG. 9, the coil component shown in FIG. The coil component shown in FIG. 9 is referred to as a vertically laminated / horizontal winding type coil component.

  In the vertically laminated / horizontal winding type coil component 40, conductor pattern layers 41 (41 a, 41 b) forming a pair are laminated in the vertical direction via an insulating magnetic layer 42, and these conductor pattern layers A plurality of coil forming conductor patterns 44 are formed on 41a and 41b, respectively. In the example of FIG. 9, the magnetic layer 42 includes a plurality of magnetic green sheets 43, and a plurality of through holes 45 are formed in the magnetic layer 42. Each of these through holes 45 has a plurality of coil-forming conductor patterns 44 in the conductor pattern layer 41b and a predetermined coil-forming conductor pattern in the plurality of coil-forming conductor patterns 44 in the conductor pattern layer 41a. 44.

  In the vertically laminated / horizontal winding type coil component 40, a coil 46 having a central axis O in the horizontal direction is formed by the plurality of coil forming conductor patterns 44 of the conductor pattern layers 41 a and 41 b and the through holes 45. Yes. In addition, the code | symbol 42 (42A) and the code | symbol 42 (42B) in FIG. 9 have each shown the magnetic layer which has a function which protects the coil 46. FIG.

  External connection electrodes 48 (48A, 48B) are respectively formed on the side surfaces of the laminated body 47 of the conductor pattern layer 41 and the magnetic layer 42 at portions facing each other. Connected to the external connection electrode 48A, the other end of the coil 46 is connected to the external connection electrode 48B. The coil 46 can be connected to the outside by external connection electrodes 48A and 48B.

JP-A-8-55726 JP 7-320936 A

  By the way, a coil component is often incorporated into an electric circuit in order to shape the waveform of a signal that is energized in the electric circuit, or is incorporated into an electric circuit in order to remove noise from the signal. For example, a coil component used for signal waveform shaping preferably has a high impedance and a large inductance value for a signal having a frequency of about 10 MHz to 100 MHz, for example. Moreover, it is preferable that the coil component used for signal noise removal has high impedance with respect to a signal having a frequency of about 100 MHz to 1000 MHz, for example.

  In the configuration of the longitudinally wound type coil component 30 shown in FIG. 7, by reducing the thickness of the magnetic layer 31, the interval (that is, the winding pitch) between adjacent coil forming conductor patterns 32 via the magnetic layer 31 is increased. For example, even if the height of the coil component 30 is limited, the number of coil-forming conductor patterns 32 (that is, the number of turns of the coil 34) can be increased. For this reason, it is easy to obtain a large inductance and impedance. However, the vertical winding type coil component 30 has a self-resonant frequency due to stray capacitance between the coil forming conductor patterns 32 and stray capacitance between the coil forming conductor pattern 32 and the external connection electrode 36. Therefore, for example, the impedance with respect to a signal having a frequency higher than about 100 MHz is low. For this reason, the vertical winding type coil component 30 has an impedance characteristic as shown in the graph of FIG. 10A, for example, and is often used for signal waveform shaping due to the impedance characteristic.

  In the vertically wound type coil component 30, as shown in FIG. 7A, the intervals between the coil forming conductor patterns 32b to 32e and the external connection electrode 36 are substantially the same. While approximately the same stray capacitance is generated between the coil forming conductor patterns 32b to 32e and the external connection electrode 36, the total stray capacitance is increased. In the configuration of the laterally laminated / horizontal winding type coil component 38 shown in FIG. 8, the left and right coil forming conductor patterns 32 are close to the external connection electrode 36 and a large stray capacitance is generated between the external connection electrode 36. However, since the inner coil-forming conductor pattern 32 is separated from the external connection electrode 36, the stray capacitance between the external connection electrode 36 is small. For this reason, the total stray capacitance generated between each coil forming conductor pattern 32 and the external connection electrode 36 is kept small, and the self-resonant frequency of the coil component 38 is set to a frequency higher than, for example, 100 MHz. it can.

  However, since it is difficult to increase the cross-sectional area of the magnetic flux at the center of the coil 34 for reasons such as height restriction, the laterally laminated / horizontal winding type coil component 38 is the same as the vertical winding type coil component 30. In order to have an inductance value, it is necessary to increase the number of turns of the coil. In order to increase the number of turns of the coil, the number of coil forming conductor patterns 32 and the number of magnetic layers 31 must be increased, which increases material costs and manufacturing costs, and is not economical. For this reason, in consideration of cost reduction, it is difficult to have a large inductance value in the configuration of the laterally laminated / horizontal winding type coil component 38.

  Further, in the vertically laminated / horizontal winding type coil component 40, the winding pitch of the coil 46 can be reduced because the spacing between the coil forming conductor patterns 44 and the spacing between the through holes 45 cannot be reduced due to manufacturing problems. However, it is difficult to increase the inductance value and impedance of the coil component 40, but the total stray capacitance generated between each coil forming conductor pattern 44 and the external connection electrode 48 is reduced. In addition, since the stray capacitance between the coil forming conductor patterns 44 can be reduced, the self-resonant frequency of the coil component 40 can be set to a frequency higher than 100 MHz, for example. Therefore, the vertically laminated / horizontal winding type coil component 40 has an impedance characteristic as shown in FIG. 10B, for example, and is often used for signal noise removal due to the impedance characteristic.

  As described above, there is a characteristic for each type of coil component, and it was difficult to provide a high impedance characteristic with a single coil component for a wide frequency range of, for example, about 10 MHz to 1000 MHz. For this reason, for example, when both signal waveform shaping and signal noise removal are to be performed, a signal waveform shaping coil component 51 and a signal noise removing coil, as shown in the model diagram of FIG. It was necessary to interpose the component 52 separately on the signal line 50.

  An object of the present invention is to provide a coil that can have a high impedance over a wide frequency range with one component, for example, a signal waveform shaping function and a signal noise removing function. To provide parts.

  In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, one configuration of the present invention is a coil component having a longitudinally wound coil portion having a longitudinal coil central axis and a laterally wound coil portion having a lateral coil central axis perpendicular to the longitudinal direction, The longitudinally wound coil portion is formed by alternately laminating a coil forming conductor pattern and an insulating magnetic layer in the vertical direction, and all the coil forming conductor patterns are electrically connected by connecting means formed on the magnetic layer. The coils are connected in series to form a coil having a central axis in the vertical direction, and in the case of the laterally wound coil portion, the conductor pattern layer forming a pair has an insulating magnetic layer. A plurality of coil forming conductor patterns formed on one side of the conductor pattern layer are respectively formed on the other conductor pattern layer by connecting means formed on the magnetic layer. A coil having a central axis in the horizontal direction connected to a predetermined coil-forming conductor pattern of a connection partner among a plurality of coil-forming conductor patterns formed, The winding coil portion and the horizontal winding coil portion are stacked in the vertical direction, and the coil of the vertical winding coil portion and the coil of the horizontal winding coil portion are electrically connected in series.

  Further, according to the present invention, in order to suppress crosstalk between the vertical winding coil portion and the horizontal winding coil portion between the vertical winding coil portion and the horizontal winding coil portion, the magnetism between the coil forming conductor patterns is reduced. It is also characterized in that a magnetic layer having a lower magnetic permeability than the layer or a nonmagnetic layer is formed.

  Further, another configuration of the present invention is a coil component having a longitudinally wound coil portion having a longitudinal coil central axis and a laterally wound coil portion having a lateral coil central axis perpendicular to the longitudinal direction. In the longitudinally wound coil portion, insulating magnetic layers and coil forming conductor patterns are alternately stacked in the vertical direction, and all the coil forming conductor patterns are connected to the magnetic layer. To form a coil electrically connected in series and having a central axis in the vertical direction, and the magnetic layer has a conductor pattern layer that forms a laterally wound coil portion at an interval adjacent to the coil forming conductor pattern. A conductor having a size that can be arranged side by side, and in the case of a horizontally wound coil portion, a pair of conductors arranged in a region adjacent to a coil forming conductor pattern that constitutes a vertically wound coil portion Pattern layer is vertical A plurality of coil forming conductor patterns arranged in a vertical direction via a magnetic layer common to the coil portion and formed on one side of the conductor pattern layers are respectively connected by connecting means formed on the magnetic layer. Forming a coil having a lateral central axis connected to a predetermined coil forming conductor pattern of a plurality of coil forming conductor patterns formed on the other conductor pattern layer The coil of the vertical winding coil part and the coil of the horizontal winding coil part are electrically connected in series.

  Furthermore, according to the present invention, an external body connected to one end side of a series connection circuit of a coil of a vertical winding coil portion and a coil of a horizontal winding coil portion is provided on a side surface of a laminate including a coil forming conductor pattern and a magnetic layer. A connection electrode and an external connection electrode connected to the other end of the series connection circuit are formed with a gap therebetween, and the external connection electrode is a bottom surface of the top surface and the bottom surface of the laminate. It is also characterized by being formed around only the side.

  According to this invention, the vertical winding coil part and the horizontal winding coil part are formed in one coil component, and the respective coil central axes of the vertical winding coil part and the horizontal winding coil part are Since the directions are orthogonal to each other, the vertically wound coil portion and the horizontally wound coil portion can operate as separate coils. Moreover, since the vertical winding coil portion has a configuration in which the magnetic layers and the coil forming conductor patterns are alternately stacked in the vertical direction, it is high like the above-described vertical winding type coil component. Although it is difficult to have a self-resonant frequency, since it can have a large impedance and inductance, for example, the longitudinally wound coil portion can be easily configured to function for signal waveform shaping.

  Further, the laterally wound coil portion is formed on the magnetic layer and a coil forming conductor pattern in which a pair of conductor pattern layers are vertically arranged via a magnetic layer and formed on each pair of conductor pattern layers. Since it has a configuration that forms a coil having a lateral center axis by connecting means, it is easy to increase the self-resonance frequency in the same way as the above-described vertically laminated / horizontal winding type coil component. As a result, it is easy to increase the frequency of the frequency region showing a large impedance. For this reason, it is possible to easily configure the horizontally wound coil portion so as to function, for example, for removing signal noise.

  Therefore, the coil component of the present invention has an impedance characteristic that combines the impedance characteristic of the longitudinally wound coil part and the impedance characteristic of the laterally wound coil part that is different from the impedance characteristic (that is, the longitudinally wound coil part or the vertically laminated / horizontal). (Impedance characteristics with a wide frequency range with a larger impedance than the impedance characteristics of the winding type coil component). For example, a signal waveform shaping function and a signal noise removing function can be achieved with a single component. And can have both functions.

  For this reason, by incorporating the coil component of the present invention into a circuit, for example, both signal waveform shaping and signal noise removal can be performed. Therefore, by adopting the coil component of the present invention, signal waveform shaping can be performed. This eliminates the need to separately incorporate a coil component for removing signal noise and a coil component for removing signal noise separately from the coil component into the circuit. For example, the number of circuit components can be reduced and the circuit can be simplified. It is possible to reduce the work of assembling the coil component into the circuit. In addition, since only one coil component needs to be incorporated in the circuit, the area occupied by the coil component in the circuit can be reduced.

  Furthermore, the above-described vertical winding type coil component and the vertically laminated / horizontal winding type coil component are simply overlapped or arranged side by side. While the magnitude of the stray capacitance generated between the conductor pattern and the conductor pattern does not change, in the present invention, the vertically wound coil portion and the horizontally wound coil portion are integrated, and an external connection electrode is provided in this integrated body. Since the provided configuration can be adopted, the external connection electrode is not formed in the portion between the vertical winding coil portion and the horizontal winding coil portion, and the size of the external connection electrode can be reduced accordingly. In addition, stray capacitance generated between the coil forming conductor pattern and the external connection electrode can be reduced. For this reason, an impedance and an inductance value can be enlarged. This effect increases especially as the frequency increases.

  Furthermore, by providing a configuration in which a magnetic layer having a lower magnetic permeability than the magnetic layer between the coil forming conductor patterns or a nonmagnetic layer is formed between the vertically wound coil portion and the horizontally wound coil portion. The crosstalk between the vertical winding coil portion and the horizontal winding coil portion can be suppressed.

  Furthermore, the external connection electrode formed on the side surface of the multilayer body including the coil forming conductor pattern and the magnetic layer has a configuration in which it is formed so as to wrap around only the bottom surface side of the top surface and the bottom surface of the multilayer body. Therefore, the external connection electrode is smaller than the case where the external connection electrode is formed so as to wrap around both the upper surface side and the bottom surface side of the laminate, so that the coil forming conductor pattern and the external connection electrode The stray capacitance generated during the period can be reduced. Thereby, the impedance and inductance value of the coil component can be increased.

  Embodiments according to the present invention will be described below with reference to the drawings.

  1A is a schematic perspective view showing the coil component of the first embodiment, and FIG. 1B is an image sectional view of the coil component of the first embodiment. FIG. 2C shows a schematic exploded view of the coil component of the first embodiment. The coil component 1 according to the first embodiment has a configuration in which a vertically wound coil portion 2 and a horizontally wound coil portion 3 are laminated in the longitudinal direction with a nonmagnetic layer 4 interposed therebetween.

The longitudinally wound coil section 2 has a configuration in which insulating magnetic layers 5 and coil forming conductor patterns 6 are alternately stacked in the longitudinal direction. All the coil forming conductor patterns 6 (6a to 6g) are made of a conductive material such as Ag, Au, or Cu, and all the coil forming conductor patterns 6 (6a to 6g) are formed on the magnetic layer 5. are electrically connected in series by a through-hole 7 is connected means to form a coil 8 having a longitudinal central axis O _Z.

  The magnetic layer 5 is made of a magnetic material such as ferrite. Of the magnetic layers 5a to 5h constituting the longitudinal coil portion 2, the lowermost magnetic layer 5a and the uppermost magnetic layer 5h also have a function as a protective layer. For example, when each magnetic layer 5 is configured using a green sheet based on a magnetic material such as ferrite, the magnetic layers 5a and 5h functioning as protective layers are formed by stacking a plurality of green sheets, for example. And formed thicker than the other magnetic layers 5.

The laterally wound coil portion 3 has a configuration in which conductor pattern layers 10 (10A, 10B) forming a pair are stacked in the vertical direction with an insulating magnetic layer 11 interposed therebetween. A plurality of strip-shaped coil forming conductor patterns 12 are arrayed on the conductor pattern layers 10A and 10B, respectively. Each of the coil forming conductor patterns 12 of the conductor pattern layer 10 on one side of the conductor pattern layers 10A and 10B is respectively replaced with a predetermined coil counterpart conductor pattern 12 of the conductor pattern layer 10 on the other side. , it is connected via a through-hole 13 is a connecting means which is formed in the magnetic layer 11, a coil 14 having a transverse center axis O _Y is formed.

  FIG. 1C shows a configuration example in the case where the magnetic layer 11 is configured using a green sheet based on a magnetic material such as ferrite. In the illustrated example, a plurality of sheets are illustrated. The magnetic layer 11 is formed by overlapping the green sheets. Further, the horizontal winding coil portion 3 is formed with a magnetic layer 15 (15a, 15b) that functions as a protective layer for protecting the conductor pattern layer 10. When these magnetic layers 15 (15a, 15b) are formed of green sheets, for example, the magnetic layer 15 is formed by stacking a plurality of green sheets.

  In the first embodiment, the coil 8 of the vertical winding coil portion 2 and the coil 14 of the horizontal winding coil portion 3 are electrically connected in series via a through hole 16 formed in the nonmagnetic layer 4. Yes.

  The laminate 17 including the magnetic layers 5, 11, 15 and the coil forming conductor patterns 6, 12 as described above has a rectangular parallelepiped shape, and on the side surfaces of the laminate 17 facing each other, FIG. As shown in a), external connection electrodes 18 (18A, 18B) are formed. These external connection electrodes 18A and 18B are formed so as to wrap around the upper surface, the bottom surface, and the adjacent side surfaces of the multilayer body 17, respectively.

  One end side of the series connection circuit of the coil 8 of the vertical winding coil portion 2 and the coil 14 of the horizontal winding coil portion 3 (for example, the end portion on the coil 14 side of the horizontal winding coil portion 3) is connected to the external connection electrode 18A. The other end side of the series connection circuit (for example, the end portion on the coil 8 side of the longitudinally wound coil portion 2) is connected to the external connection electrode 18B. In the first embodiment, for example, the external connection electrodes 18A and 18B of the coil component 1 are connected to a circuit setting position by solder or the like, whereby the series connection circuit of the coils 8 and 14 is incorporated into the circuit. it can.

  Since the vertical winding coil portion 2 of the coil component 1 of the first embodiment has the same properties as the above-described vertical winding type coil component 30, for example, as shown by a dotted line A in the graph of FIG. For example, it can have impedance characteristics suitable for signal waveform shaping. Further, since the laterally wound coil section 3 has the same properties as the above-described vertically laminated / horizontal winding type coil component 40, for example, for example, signal noise removal as indicated by a chain line B in the graph of FIG. It is possible to have impedance characteristics suitable for.

  For these reasons, the coil component 1 as a whole has impedance characteristics as indicated by, for example, the solid line C in the graph of FIG. 2 in which the impedance characteristics of the vertical winding coil portion 2 and the horizontal winding coil portion 3 are combined. Can do. By the way, for example, when the vertically laminated / horizontal winding type coil component 40 shown in FIG. 9 is simply stacked on the upper side of the vertical winding type coil component 30 shown in FIG. A part of each of the external connection electrodes 36 (36A, 36B), 48 (48A, 48B) of the coil parts 30, 40 enters between the parts 40. On the other hand, in the coil component 1 of the first embodiment, the non-magnetic layer 4 is only provided between the vertical winding coil portion 2 and the horizontal winding coil portion 3, and there is no external connection electrode 18, Compared with the case where the coil components 30 and 40 are merely overlapped, the coil-forming conductor pattern and the external connection electrode are less than the amount of the external connection electrode 18 between the vertical winding coil portion 2 and the horizontal winding coil portion 3. The generated stray capacitance can be reduced. For this reason, the coil component 1 of the first embodiment can have a large impedance as compared with the case where the coil components 30 and 40 are simply overlapped.

  Moreover, the vertical winding coil part 2 of the coil component 1 according to the first embodiment has a DC superposition characteristic as indicated by a dotted line A in the graph of FIG. It has a DC superposition characteristic as shown by a chain line B in the graph of FIG. For this reason, the coil component 1 as a whole can have a DC superimposition characteristic as indicated by a solid line C in the graph of FIG. 3, for example, which combines the DC superposition characteristics of the vertical winding coil portion 2 and the horizontal winding coil portion 3. .

  That is, in the case of the vertically wound type coil component 30 of FIG. 7, for example, it can have an inductance value of about 5 to 10 μH, but magnetic saturation occurs with a direct current of about 100 mA or more, and the coil The inductance value of the component 30 becomes extremely small. On the other hand, in the coil component 1 of the first embodiment, for example, as shown in the graph of FIG. 3, the longitudinal winding coil portion 2 can have an inductance value of about 5 to 10 μH. In addition, even if the vertical winding coil portion 2 is magnetically saturated, the horizontal winding coil portion 3 is less likely to be magnetically saturated than the vertical winding coil portion 2, so that the direct current of a magnitude that causes the vertical winding coil portion 2 to generate magnetic saturation. However, a decrease in the inductance value is suppressed by the horizontally wound coil portion 3. In particular, the magnetic properties of the vertically wound coil portion 2 and the horizontally wound coil portion 3 are set so that the magnetic permeability of the magnetic layers 11 and 15 of the horizontally wound coil portion 3 is lower than the permeability of the magnetic layer 5 of the vertically wound coil portion 2. By appropriately selecting the magnetic material constituting the layers 5, 11, and 15, the laterally wound coil portion 3 can more effectively suppress the inductance value reduction of the coil component 1 due to the magnetic saturation of the vertically wound coil portion 2. It becomes possible to do.

  The coil component 1 according to the first embodiment is configured as described above. This coil component 1 can be manufactured as follows, for example. For example, a plurality of green sheets based on a magnetic material such as ferrite and a green sheet to be the nonmagnetic layer 4 are prepared. For example, the coil forming conductor patterns 6 (6a to 6g) and 12 are formed by screen printing or the like. Each is formed on a green sheet. Further, the through holes 7 and 13 are formed in the green sheet as necessary. And the conductor pattern layer 10 which consists of each green sheet in which each coil formation conductor pattern 6 (6a-6g) of the vertical winding coil part 2 was each formed, and several coil formation conductor patterns 12 of the horizontal winding coil part 3 is formed. (10A, 10B) formed in advance, through-hole formed green sheet for forming the magnetic layer 11 of the laterally wound coil portion 3, green sheet forming the nonmagnetic layer 4 and the like are determined in advance. Laminated and arranged in the order given.

  Thereafter, these green sheet laminates are pressurized and pressure-bonded and fired to obtain a sintered body of magnetic material. Thereafter, a conductive paste to be the external connection electrode 18 is applied to the side surface of the sintered body and baked, and then a plating process is performed. In this way, the coil component 1 can be manufactured. In the configuration of the first embodiment, the stacking direction of the magnetic layer 5 and the coil forming conductor pattern 6 of the longitudinally wound coil portion 2 and the stacking direction of the conductor pattern layer 10 and the magnetic layer 11 of the horizontally wound coil portion 3 are as follows. Since it is the same direction, the vertical winding coil part 2 and the horizontal winding coil part 3 can be manufactured continuously and collectively. For this reason, complication of manufacture of the coil component 1 can be prevented.

  The second embodiment will be described below. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions of common portions are omitted.

  As shown in the image sectional view of FIG. 4 (a) and the schematic exploded view of FIG. 4 (b), the coil component 1 of the second embodiment is composed of a vertically wound coil portion 2 and a horizontally wound coil portion 3. The configuration is such that they are juxtaposed in the horizontal direction. In the coil component 1 of the second embodiment, the vertical winding coil portion 2 and the horizontal winding coil portion 3 are arranged in parallel in the horizontal direction, not in the vertical direction (height direction), and the height is suppressed. It is suitable for cases where height restrictions due to specifications are severe.

  In the second embodiment, a plurality of magnetic layers 20 (20a to 20g) common to the vertical winding coil portion 2 and the horizontal winding coil portion 3 are stacked in the vertical direction. The coil forming conductor pattern 6 of the vertically wound coil portion 2 is formed in each of the right regions shown in FIG. The coil forming conductor pattern 6 is also formed between the magnetic layers 20b and 20c, between the magnetic layers 20c and 20d, and between the magnetic layers 20d and 20e. In FIG. 4B, these coil forming conductors are formed. Since the pattern 6 is hidden behind the magnetic layer 20, it is not shown.

The plurality of coil-forming conductor patterns 6 arranged between the magnetic layers 20 are electrically connected in series by through holes 7 formed in the magnetic layer 20 and are longitudinally connected in the same manner as in the first embodiment. A coil 8 having a central axis O _{Z in the} direction is formed.

  The plurality of coil forming conductor patterns 12 on one side 10A of the conductor pattern layers 10A and 10B forming a pair of the horizontally wound coil portion 3 are respectively out of the plurality of coil forming conductor patterns 6 of the vertically wound coil portion 2. (In the example of FIG. 4, the coil forming conductor pattern 6 </ b> L disposed on the lowermost side) is formed in the left region of the magnetic layer 20 a that is the same formation surface. Each of the plurality of coil forming conductor patterns 12 of the other conductor pattern layer 10B is one of the coil forming conductor patterns 6 different from the coil forming conductor pattern 6L of the longitudinally wound coil portion 2 (FIG. 4). In this example, the magnetic layer 20f is formed in the left region of the same formation surface as the coil forming conductor pattern 6H) disposed on the uppermost side.

In addition, in the left region of the magnetic layer 20 (20b to 20f) between the conductor pattern layers 10A and 10B, the coil forming conductor patterns 12 of the conductor pattern layer 10A are respectively determined in advance of the conductor pattern layer 10B. A through hole 13 is formed for connection to the coil forming conductor pattern 12 to be connected. This through-hole 13, the conductor pattern layer 10A, a plurality of coils forming conductor patterns 12 and 10B is electrically connected in series, as in the first embodiment, with the lateral center axis O _Y A coil 14 is formed.

  The coil 8 of the vertical winding coil portion 2 and the coil 14 of the horizontal winding coil portion 3 are electrically connected in series by, for example, a conductor pattern 21 formed on the magnetic layer 20f. One end side (for example, the end portion on the coil 14 side) of the series connection circuit of the coils 8 and 14 is an external connection electrode formed on the side surface of the laminate 17 of the coil forming conductor patterns 6 and 12 and the magnetic layer 20. The other end side (for example, the end portion on the coil 8 side) of the series connection circuit is connected to another external connection electrode 18B formed on the side surface of the multilayer body 17. That is, the series connection circuit of the coils 8 and 14 can be connected to the outside by the external connection electrodes 18A and 18B.

  The coil component 1 of the second embodiment is configured as described above, and has the same impedance characteristics as the first embodiment (that is, the impedance characteristics as shown by the solid line C in FIG. 2) and the DC superposition characteristics. (For example, DC superposition characteristics as indicated by a solid line C in FIG. 3).

  By the way, for example, when the vertically wound type coil component 30 as shown in FIG. 7 and the vertically laminated and horizontally wound type coil component 40 as shown in FIG. In contrast to the presence of the external connection electrodes 36 and 48, in the second embodiment, there is no external connection electrode between the vertical winding coil portion 2 and the horizontal winding coil portion 3. The stray capacitance generated between the connecting electrode and the coil forming conductor patterns 6 and 12 can be reduced. For this reason, also in the coil component 1 of the second embodiment, as in the coil component 1 of the first embodiment, the vertically wound type coil component 30 and the vertically laminated / horizontal wound type coil component 40 are merely provided. The impedance of the coil component 1 can be increased as much as the stray capacitance is reduced as compared with the configuration in which the coils are arranged in parallel.

  When manufacturing the coil component 1 according to the second embodiment, for example, first, the coil forming conductor patterns 6 and 12 and the through holes 7 and 13 are formed on the green sheet to be the magnetic layer 20 based on the magnetic material. Etc. At this time, for example, the coil forming conductor pattern 6 of the vertically wound coil portion 2 and the coil forming conductor pattern 12 of the horizontally wound coil portion 3 are simultaneously formed on the green sheet to be the magnetic layer 20a. In the green sheet, the component part of the vertical coil part 2 and the component part of the horizontal coil part 3 are formed simultaneously.

  Then, the respective green sheets on which the predetermined coil forming conductor patterns 6 and 12 and the through holes 7 and 13 are formed are stacked and arranged in a predetermined order, and the green sheets are formed as in the first embodiment. Are pressed and pressed, and sintered to form a sintered body of magnetic material. Thereafter, the external connection electrode 18 is formed on the side surface of the sintered body. In this way, the coil component 1 of the second embodiment can be manufactured by forming the longitudinal coil portion 2 and the lateral coil portion 3 collectively.

  In addition, this invention is not limited to the form of each 1st or 2nd embodiment, Various embodiments can be taken. For example, in the first embodiment, the horizontal winding coil portion 3 is laminated on the upper side of the vertical winding coil portion 2, but the vertical winding coil portion 2 is laminated on the upper side of the horizontal winding coil portion 3 in the vertical direction. It may be. Further, the horizontal winding coil portion 3 may be laminated on the upper side of the vertical winding coil portion 2, and another vertical winding coil portion 2 may be laminated on the upper side of the horizontal winding coil portion 3. The numbers of the vertical winding coil portion 2 and the horizontal winding coil portion 3 included in the component 1 and the stacking order thereof are not particularly limited, and may be set as appropriate.

  In the first embodiment, for example, as shown in the cross-sectional view of FIG. 1B, the thickness of the lowermost magnetic layer 5a and the thickness of the uppermost magnetic layer 5h in the longitudinally wound coil portion 2 are as follows. The thicknesses of the magnetic layer 15a and the magnetic layer 15b in the laterally wound coil portion 3 were almost the same. The magnetic layer 5a of the vertical winding coil part 2 and the magnetic layer 15b of the horizontal winding coil part 3 need to be thick enough to protect the coil forming conductor patterns 6 and 12, but the magnetic layers 5h and 15a are Since the coil forming conductor patterns 6 and 12 do not have to be protected, the magnetic layers 5h and 15a are thinner than the magnetic layers 5a and 15b as shown in the image cross-sectional view of FIG. It may be formed. By forming the magnetic layers 5h and 15a thin, it is possible to make the height lower than that of the coil component 1 shown in FIG.

  Furthermore, in the first embodiment, the nonmagnetic layer 4 is interposed between the vertical winding coil portion 2 and the horizontal winding coil portion 3. However, for example, the height restriction on the coil component 1 is loose and the vertical winding coil portion. When the space between the coil forming conductor pattern 6 of 2 and the coil forming conductor pattern 12 of the horizontally wound coil portion 3 can be widened, the longitudinally wound coil portion 2 and the horizontally wound coil portion are widened by the wide space. 3 can be suppressed. In such a case, the nonmagnetic layer 4 may be omitted.

  Further, in addition to the configuration of the second embodiment, a magnetic part having a magnetic permeability lower than that of the magnetic layer 20 in the part between the vertical winding coil part 2 and the horizontal winding coil part 3, or non- The magnetic portion may be provided continuously in the longitudinal direction or intermittently.

  Furthermore, in the second embodiment, the vertical winding coil portion 2 and the horizontal winding coil portion 3 are examples arranged in the horizontal direction one by one, but each of the vertical winding coil portion 2 and the horizontal winding coil portion 3. The number of formed may be plural, and of course, the number of formed of the vertical winding coil part 2 and the horizontal winding coil part 3 may be different.

  Furthermore, in each of the first and second embodiments, the external connection electrode 18 is formed so as to wrap around the both sides of the top surface and the bottom surface of the multilayer body 17, but in order to incorporate the coil component 1 into a circuit. If the external connection electrode 18 wraps around only on the bottom surface side of the laminate 17, a better connection with an external circuit can be obtained. For example, as shown in the model diagram of FIG. The external connection electrode 18 may be formed so as to wrap around only on the bottom surface side of the top surface and bottom surface of the multilayer body 17 and not on the top surface side. In this case, since the external connection electrode 18 does not wrap around the upper surface side of the multilayer body 17, the external connection electrode 18 and the coil formation are formed rather than the coil component 1 of each of the first and second embodiments. The stray capacitance between the conductive patterns 6 and 12 can be suppressed.

  Thereby, for example, when the external connection electrodes 18 are formed so as to wrap around the both sides of the top surface and the bottom surface of the multilayer body 17, the coil component 1 has an impedance as indicated by a dotted line in FIG. 6B, for example. In contrast to having the characteristic, by eliminating the wraparound of the external connection electrode 18 to the upper surface side of the multilayer body 17, the impedance can be increased as shown by the solid line in FIG. 6B. it can. The impedance characteristics shown in FIG. 6B were obtained under the condition that the longitudinally wound coil portion 2 has an inductance value of about 10 μH and the laterally wound coil portion 3 has an inductance value of about 1 μH. Is.

  Further, in each of the first and second exemplary embodiments, the example in which the coil component 1 is manufactured using the green sheet is shown, but the coil component 1 may be manufactured without using the green sheet. For example, a base substrate is prepared, a paste-like magnetic material is formed on the substrate by printing, the coil forming conductor patterns 6 and 12 are laminated on the upper side, and the magnetic is again on the upper side. The coil component 1 may be manufactured by using printing, a vacuum film formation technique, or the like, such as stacking materials.

  Further, the shapes of the coil forming conductor patterns 6 and 12 of the vertical winding coil portion 2 and the horizontal winding coil portion 3 shown in FIG. 1 and FIG. 4 and the coils 8 and 14 including the coil forming conductor patterns 6 and 12 are used. The number of turns of the coil is an example, and the number of turns and the winding pitch of the coils 8 and 14 and the shape of the coil forming conductor patterns 6 and 12 are not limited to the examples shown in the drawings, and are required by the specifications. It is appropriately set according to the impedance, inductance value, DC superposition characteristics, and the like.

It is a figure for demonstrating the coil components of the example of 1st Embodiment. It is the graph which showed an example of the impedance characteristic of the coil components of 1st Embodiment. It is the graph which showed an example of the direct current superposition characteristic of the coil components of the example of the 1st embodiment. It is a figure for demonstrating the coil components of the example of 2nd Embodiment. It is typical sectional drawing which showed the modification of the example of 1st Embodiment. It is a figure for demonstrating other example embodiments. It is a figure for demonstrating an example of a coil component of a vertical winding type. It is typical sectional drawing for demonstrating an example of a coil component of a horizontal lamination | stacking and horizontal winding type. It is a figure for demonstrating an example of a vertical direction lamination | stacking / horizontal winding type coil component. It is a graph which shows an example of the impedance characteristic which the coil components shown by FIG.7 and FIG.9 have. It is a model figure which shows one example of a case where the coil component for signal waveform shaping and the coil component for signal noise removal are provided in the signal line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil components 2 Vertically wound coil part 3 Horizontally wound coil part 4 Nonmagnetic layer 5,11,15,20 Magnetic layer 6,12 Coil formation conductor pattern 7,13 Through hole 8,14 Coil 10 Conductor pattern layer 18 External connection Electrode

Claims (4)

  A coil component having a longitudinally wound coil portion having a longitudinal coil central axis and a laterally wound coil portion having a transverse coil central axis perpendicular to the longitudinal direction, wherein the longitudinally wound coil portion is a coil-forming conductor. Patterns and insulating magnetic layers are alternately stacked in the vertical direction, and all the coil-forming conductor patterns are electrically connected in series by connecting means formed in the magnetic layer and are connected in the vertical direction. The coil has a configuration in which a coil having a central axis is formed, and in the laterally wound coil portion, a pair of conductor pattern layers are laminated in the vertical direction via an insulating magnetic layer, and A plurality of coil forming conductor patterns formed on one side of the conductor pattern layer are respectively connected to a plurality of coil forming conductor patterns formed on the other conductor pattern layer by connecting means formed on the magnetic layer. The coil has a configuration in which a coil having a central axis in the horizontal direction connected to a predetermined coil forming conductor pattern in the pattern is formed, and a longitudinally wound coil part, a transversely wound coil part, Are stacked in the vertical direction, and the coil of the vertical winding coil part and the coil of the horizontal winding coil part are electrically connected in series.   In order to suppress crosstalk between the vertical winding coil portion and the horizontal winding coil portion between the vertical winding coil portion and the horizontal winding coil portion, the magnetic permeability is lower than that of the magnetic layer between the coil forming conductor patterns. The coil component according to claim 1, wherein a magnetic layer having a nonmagnetic layer or a nonmagnetic layer is formed.   A coil component having a longitudinally wound coil portion having a longitudinal coil central axis and a laterally wound coil portion having a transverse coil central axis perpendicular to the longitudinal direction, wherein the longitudinally wound coil portion has an insulating magnetic property. Layers and coil forming conductor patterns are alternately stacked in the vertical direction, and all the coil forming conductor patterns are electrically connected in series by connecting means formed in the magnetic layer. A coil having a central axis is formed, and the magnetic layer has a configuration having a size that allows a conductor pattern layer constituting a laterally wound coil portion to be arranged side by side on the side adjacent to the coil forming conductor pattern, Further, in the horizontally wound coil portion, the conductor pattern layers forming a pair arranged in the adjacent region of the coil forming conductor pattern constituting the vertically wound coil portion have the same magnetic layer as the vertically wound coil portion. Through the vertical The plurality of coil forming conductor patterns formed on one side of the conductor pattern layers are respectively formed on the other conductor pattern layer by connecting means formed on the magnetic layer. It is configured to form a coil having a central axis in the horizontal direction that is connected to a predetermined coil-forming conductor pattern of a connection partner among a plurality of coil-forming conductor patterns, A coil component, wherein the coil and the coil of the horizontally wound coil portion are electrically connected in series.   On the side surface of the laminate including the coil forming conductor pattern and the magnetic layer, an external connection electrode connected to one end side of a series connection circuit of a coil of a vertical winding coil portion and a coil of a horizontal winding coil portion, and the series External connection electrodes connected to the other end side of the connection circuit are formed with a space therebetween, and these external connection electrodes are formed so as to wrap around only the bottom surface side of the top surface and the bottom surface of the laminate. The coil component according to claim 1, 2, or 3.

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