JP2012227223A - Laminated coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated coil component capable of reducing stray capacitance and DC resistance.SOLUTION: A laminated coil component 1 comprises an element 2, coils C1-C4, and external electrodes 3, 4, and each of the coils C1-C3 includes spiral first coils C1A-C4A and spiral second coils C1B-C4B connected in parallel. First conductor patterns 12a-12d and second conductor patterns 13a-13d have the same shape, and are arranged in point symmetry on the same insulator layers L4-L7 around the circumferential center line C so that the circumferential center lines C of the first coils C1A-C4A and the second coils C1B-C4B are aligned. Between the first conductor patterns 12a-12d and second conductor patterns 13a-13d arranged in point symmetry on the insulator layers L4-L7, a separation part D is formed to face the first conductor patterns 12a-12d or the second conductor patterns 13a-13d at the adjoining coils C1-C4.

Description

  The present invention relates to a laminated coil component.

  As a conventional multilayer coil component, a component including an element body formed by laminating a plurality of insulator layers and a plurality of coils spirally formed in the element body is known (for example, Patent Documents). 1). In this laminated coil component, a plurality of conductor patterns having a substantially U shape are arranged in the same direction in each insulator layer, and a plurality of coils are configured by connecting each conductor pattern in series in the lamination direction. .

JP 2006-32425 A

  However, the conventional laminated coil component has a problem in that stray capacitance is generated in the adjacent coil because the sides of the conductor patterns face each other, and stray capacitance is generated in the portion. Further, in the laminated coil component, it is desired to reduce the direct current resistance.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a laminated coil component capable of reducing stray capacitance and direct current resistance.

  In order to solve the above problems, a multilayer coil component according to the present invention includes an element body in which a plurality of insulator layers are laminated, a plurality of coils juxtaposed inside the element body, and a surface of the element body. A plurality of external electrodes connected to both ends of each of the plurality of coils, the plurality of coils including a plurality of first coil conductors connected in series, and a plurality of first coils formed in series. Each of the second coil conductors includes a spiral second coil connected in parallel with the first coil, and the first coil conductor and the second coil conductor have the same shape. The first coil and the second coil are arranged symmetrically on the same insulator layer around the circumference center line so that the circumference center lines of the first coil and the second coil coincide with each other, and point symmetry on the insulator layer. 1st coil conductor and 2nd coil arranged in Body are formed spaced area between the, in the coil which are adjacent element assembly, and apart from those of the first coil conductor and the second coil conductor, characterized in that the faces.

  In this laminated coil component, a separation portion is formed between the first coil conductor and the second coil conductor that are arranged point-symmetrically on the insulator layer, and in the adjacent coil, the separation portion and the first coil conductor or The second coil conductor faces the second coil conductor. As described above, since the sides of the coil conductors are not opposed to each other in the adjacent coils, generation of stray capacitance due to the sides can be suppressed, and stray capacitance can be reduced. Also, a spiral first coil constituted by connecting a plurality of first coil conductors in series and a plurality of second coil conductors connected in series and connected in parallel with the first coil A plurality of coils are constituted by the spiral second coil. Therefore, in the connection conductors constituting the first coil and the second coil, there is almost no portion where the conduction path becomes narrow (the cross-sectional area becomes small), so that the direct current resistance can be reduced.

  It is preferable that the adjacent coils are arranged such that the other coil is rotated by approximately 90 ° around the rotation center line with respect to one coil. According to such a configuration, the separated portion and the first coil conductor or the second coil conductor can be suitably opposed to each other.

  It is preferable that the first coil conductor and the second coil conductor have a linear shape. According to such a structure, since a separation part is favorably formed between the first coil conductor and the second coil conductor, it is possible to further suppress the generation of stray capacitance in adjacent coils.

  The element body has a pair of end surfaces facing each other, a pair of main surfaces extending so as to connect the pair of end surfaces, and extending so as to connect the pair of main surfaces and facing each other in the stacking direction of the plurality of insulator layers. Preferably, each of the plurality of external electrodes is formed on each of the pair of side surfaces, and the center line of the plurality of coils extends in the opposing direction of the pair of side surfaces. According to such a configuration, the number of turns of the coil can be ensured as compared with the case where each coil extends in the opposing direction of the main surface. Further, the portion where the coil and the external electrode face each other can be reduced, and the stray capacitance between the coil and the external electrode can be reduced.

  According to the present invention, stray capacitance and direct current resistance can be reduced.

It is a perspective view which shows the multilayer coil component which concerns on 1st Embodiment. FIG. 2 is a developed perspective view of an element body of the multilayer coil component shown in FIG. 1. It is a perspective view which shows the coil comprised by the coil conductor shown in FIG. It is the figure which looked at the insulator layer shown in FIG. 2 from the top. It is a graph which shows the relationship between a frequency and an impedance. It is an expansion | deployment perspective view of the element | base_body of the multilayer coil component which concerns on 2nd Embodiment. It is a perspective view which shows the coil comprised by the coil conductor shown in FIG. It is the figure which looked at the insulator layer shown in FIG. 6 from the top. It is a perspective view which shows the coil which concerns on a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

[First Embodiment]
As shown in each figure, the laminated coil component 1 is a laminated bead array mounted on the surface of a circuit board (not shown), and has a rectangular parallelepiped shape formed by laminating a plurality of insulator layers L1 to L10. The element body 2, a plurality (four in this case) of external electrodes 3 formed on one side surface 2e of the element body 2, and a plurality (four in this case) formed on the other side surface 2f of the element body 2. The external electrode 4 and a coil portion 5 including a plurality of (here, four) coils C1 to C4 are provided.

  The element body 2 has a pair of end faces 2a, 2b facing the longitudinal direction of the element body 2 and parallel to each other, and a pair of main faces 2c, 2d extending so as to connect the pair of end faces 2a, 2b and facing each other. And a pair of side surfaces 2e and 2f extending so as to connect the pair of main surfaces 2c and 2d and facing each other. In the element body 2, the dimension between the pair of side surfaces 2e and 2f is larger than the dimension between the pair of main surfaces 2c and 2d. The external electrode 3 extends in the laminating direction on the side surface 2e and protrudes from the side surfaces 2c and 2d. The external electrode 4 extends in the laminating direction on the side surface 2f and protrudes from the side surfaces 2c and 2d. The external electrodes 3 and 4 are formed by applying a conductive paste containing Ag or glass as a main component after firing the element body 2 and performing a plating treatment after firing.

  The element body 2 is configured by stacking a plurality (here, ten) of rectangular insulating layers L1 to L10. Specifically, a predetermined conductor pattern such as a coil conductor is printed and a through hole is formed on the surface of a ferrite green sheet made of a ferrite material mainly composed of Fe, Ni, Cu, and Zn. Thereafter, a plurality of ferrite green sheets are laminated and pressure-bonded by applying pressure in the laminating direction to obtain a sheet laminate. And the element | base_body 2 is formed by baking after the said sheet | seat laminated body is cut into the unit shape of the element | base_body 2. As shown in FIG. The size of the element body 2 after firing is such that the length (L) in the stacking direction is 0.35 to 1.55 mm, and the size of the side perpendicular to the stacking direction (width: W) is 0.8 to 3. 2 mm, and the size (height: T) of the side perpendicular to the stacking direction is 0.2 to 0.8 mm. Moreover, the thickness of the insulating layers L1 to L10 after firing is set to 0.005 to 0.015 mm. The dimensions (L × W × T) of the laminated coil component 1 are, for example, 0.8 mm × 0.4 mm × 0.2 mm, 1.6 mm × 0.8 mm × 0.4 mm, and the like. In the actual laminated coil component 1, the insulating layers L <b> 1 to L <b> 10 are integrated so as not to be visually recognized.

  As shown in FIG. 2, the element body 2 is configured by laminating a plurality of (here, ten) rectangular insulator layers L1 to L10. Inside the element body 2, four coils C <b> 1 to C <b> 4 are configured by laminating conductor patterns printed on a ferrite green sheet, and these coils C <b> 1 to C <b> 4 are arranged in the longitudinal direction of the element body 2. They are juxtaposed in the direction facing the end faces 2a and 2b or the direction perpendicular to the stacking direction.

  In addition, in the element body 2, lead-out portions 6 and 7 that lead out the coils C1 to C4 in the stacking direction and electrically connect the external electrodes 3 and 4 (see FIG. 1) and the coils C1 to C4, respectively. The first connection conductor pattern 8 and the second connection conductor pattern 9 that electrically connect the coils C1 to C4 and the lead portions 6 and 7, respectively, are disposed. The conductors are connected to each other by through-hole conductors in the stacking direction. Each coil C1-C4 is comprised from 1st coil C1A-C4A and 2nd coil C1B-C4B, respectively. The rotation center line C of each of the coils C1 to C4 extends in the stacking direction (opposite direction of the side surfaces 2e and 2f).

  The lead-out portion 6 is configured by laminating a plurality (here, two layers) of insulator layers L1 and L2. A lead conductor 10 is formed on the surface of the insulator layer L1. The lead conductors 10 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically connected to the external electrode 3. The lead conductors 10 are electrically insulated from each other.

  A lead conductor 11 is formed on the surface of the insulator layer L2. The lead conductors 11 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other. The lead conductor 11 is electrically connected to a through-hole conductor H1 formed through the insulator layer L2 in the thickness direction. The lead conductor 11 is electrically connected to the adjacent first connection conductor pattern 8 through the through-hole conductor H1 in a stacked state. The lead conductor 10 and the lead conductor 11 are electrically connected by a through-hole conductor (not shown) and constitute the lead portion 6.

  A first connection conductor pattern 8 is formed on the surface of the insulator layer L3. The 1st connection conductor pattern 8 is a part which connects 1st coil C1A-C4A and 2nd coil C1B-C4B in parallel, and is formed in linear form (I shape). The first connection conductor patterns 8 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other. Both ends of the first connection conductor pattern 8 are electrically connected to through-hole conductors H2 and H3 formed through the insulator layer L3 in the thickness direction. The first connection conductor pattern 8 is electrically connected to one end of the adjacent first conductor pattern 12a and one end of the second conductor pattern 13a via the through-hole conductors H2 and H3 in a stacked state. The central portion of the first connection conductor pattern 8 is a region that is electrically connected to the through-hole conductor H1 in a stacked state. This region has a substantially circular shape and is formed wider than the width of the conductor pattern. Hereinafter, the region electrically connected to the through-hole conductor has the same configuration.

  A first conductor pattern (first coil conductor) 12a and a second conductor pattern (second coil conductor) 13a are formed on the surface of the insulator layer L4. A set of the first conductor pattern 12a and the second conductor pattern 13a is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 12a constitutes the first coils C1A to C4A and is formed in a straight line shape (I shape) on the insulator layer L4. The first conductor pattern 12a corresponds to approximately ¼ turn of the first coils C1A to C4A. One end of the first conductor pattern 12a is a region electrically connected to the through-hole conductor H2 in a stacked state. The other end of the first conductor pattern 12a is electrically connected to a through-hole conductor H4 formed through the insulator layer L4 in the thickness direction. The first conductor pattern 12a is electrically connected to one end of the adjacent first conductor pattern 12b through the through-hole conductor H4 in a stacked state.

  The second conductor pattern 13a constitutes the second coils C1B to C4B, and is formed linearly (I-shaped) on the insulator layer L4. The second conductor pattern 13a corresponds to approximately ¼ turn of the second coils C1B to C4B. One end of the second conductor pattern 13a is a region electrically connected to the through-hole conductor H3 in a stacked state. The other end of the second conductor pattern 13a is electrically connected to a through-hole conductor H5 formed through the insulator layer L4 in the thickness direction. The second conductor pattern 13a is electrically connected to one end of the adjacent second conductor pattern 13b through the through-hole conductor H5 in a stacked state.

  Each first conductor pattern 12a and each second conductor pattern 13a have the same shape, have a predetermined interval on the insulator layer L4, and center around the center line C of the coils C1 to C4. They are arranged point-symmetrically. On the insulator layer L4, the first conductor pattern 12a and the second conductor pattern 13a constituting the coil C1 are disposed along a pair of opposing sides S3 and S4 of the insulator layer L4, and the coil C1. The first conductor pattern 12a and the second conductor pattern 13a constituting the coil C2 adjacent to are arranged along a pair of opposing sides S1 and S2 of the insulator layer L4.

  Similarly, the first conductor pattern 12a and the second conductor pattern 13a constituting the coil C3 are arranged along a pair of opposing sides S3 and S4 of the insulator layer L4, and a coil adjacent to the coil C3. The first conductor pattern 12a and the second conductor pattern 13a that constitute C4 are arranged along a pair of opposing sides S1 and S2 of the insulator layer L4. That is, in the adjacent coils C1 to C4, the set of the first conductor pattern 12a and the second conductor pattern 13a is arranged in a state of being rotated by 90 ° around the circumferential center line C with respect to the adjacent set.

  A first conductor pattern 12b and a second conductor pattern 13b are formed on the surface of the insulator layer L5. A set of the first conductor pattern 12b and the second conductor pattern 13b is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 12b constitutes the first coils C1A to C4A, and is formed linearly on the insulator layer L5. The first conductor pattern 12b corresponds to approximately ¼ turn of the first coils C1A to C4A. One end of the first conductor pattern 12b is a region electrically connected to the through-hole conductor H4 in a stacked state. The other end of the first conductor pattern 12b is electrically connected to a through-hole conductor H6 that is formed through the insulator layer L5 in the thickness direction. The first conductor pattern 12b is electrically connected to one end of the adjacent first conductor pattern 12c through the through-hole conductor H6 in a stacked state.

  The second conductor pattern 13b constitutes the second coils C1B to C4B and is formed linearly on the insulator layer L5. The second conductor pattern 13b corresponds to approximately ¼ turn of the second coils C1B to C4B. One end of the second conductor pattern 13b is a region electrically connected to the through-hole conductor H5 in a stacked state. The other end of the second conductor pattern 13b is electrically connected to a through-hole conductor H7 formed through the insulator layer L5 in the thickness direction. The second conductor pattern 13b is electrically connected to one end of the adjacent second conductor pattern 13b through the through-hole conductor H7 in a stacked state.

  Each first conductor pattern 12b and each second conductor pattern 13b have the same shape, have a predetermined interval on the insulator layer L5, and center around the center line C of the coils C1 to C4. They are arranged point-symmetrically. On the insulator layer L5, the first conductor pattern 12b and the second conductor pattern 13b constituting the coil C1 are arranged along a pair of opposing sides S1 and S2 of the insulator layer L5. The coil C1 The first conductor pattern 12b and the second conductor pattern 13b that constitute the coil C2 adjacent to are disposed along a pair of opposing sides S3 and S4 of the insulator layer L5.

  Similarly, the first conductor pattern 12b and the second conductor pattern 13b constituting the coil C3 are arranged along a pair of opposing sides S1 and S2 of the insulating layer L5, and a coil adjacent to the coil C3. The first conductor pattern 12b and the second conductor pattern 13b constituting C4 are arranged along a pair of opposing sides S3 and S4 of the insulator layer L5. That is, in the adjacent coils C1 to C4, the set of the first conductor pattern 12b and the second conductor pattern 13b is arranged in a state of being rotated by 90 ° around the circumferential center line C with respect to the adjacent set.

  A first conductor pattern 12c and a second conductor pattern 13c are formed on the surface of the insulator layer L6. The first conductor pattern 12c and the second conductor pattern 13c are the first conductor pattern 12a and the second conductor pattern 13a. It has the same composition as. A first conductor pattern 12d and a second conductor pattern 13d are formed on the surface of the insulating layer L7, and the first conductor pattern 12d and the second conductor pattern 13d are the first conductor pattern 12b and the second conductor pattern 13b. It has the same composition as. The first conductor pattern 12c and the first conductor pattern 12d are electrically connected by a through-hole conductor H8, and the second conductor pattern 13c and the second conductor pattern 13d are electrically connected by a through-hole conductor H9. Has been.

  A second connection conductor pattern 9 is formed on the surface of the insulator layer L8. The second connection conductor pattern 9 is a portion that connects the first coils C1A to C4A and the second coils C1B to C4B in parallel, and is formed linearly on the insulator layer L8. Both ends of the second connection conductor pattern 9 are stacked, and a through-hole conductor H10 formed at the other end of the first conductor pattern 12d and a through-hole conductor H11 formed at the other end of the second conductor pattern 13d. It is an area that is electrically connected to the. The central portion of the second connection conductor pattern 9 is electrically connected to a through-hole conductor H12 formed through the insulator layer L8 in the thickness direction. The second connection conductor pattern 9 is electrically connected to the adjacent lead conductor 14 through the through-hole conductor H12 in a stacked state.

  The lead-out portion 7 is configured by laminating a plurality (here, two layers) of insulator layers L9 and L10. A lead conductor 14 is formed on the surface of the insulator layer L9. The lead conductor 14 is a region that is electrically connected to the through-hole conductor H12 in a stacked state. The lead conductors 14 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other.

  A lead conductor 15 is formed on the surface of the insulating layer L10. The lead conductors 15 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically connected to the external electrode 4. The lead conductors 15 are electrically insulated from each other. The lead conductor 14 and the lead conductor 15 are electrically connected by a through-hole conductor (not shown) and constitute the lead portion 7.

  By laminating the insulator layers L1 to L10, the first conductor patterns 12a to 12d are connected in series, the second conductor patterns 13a to 13d are connected in series, and the coil C1 is formed inside the element body 2. To C4 (first coils C1A to C4A and second coils C1B to C4B) are formed. As shown in FIG. 3, the coils C1 to C4 are configured by first coils C1A to C4A and second coils C1B to C4B. The first coils C1A to C4A and the second coils C1B to C4B are connected in parallel by the first connection conductor pattern 8 and the second connection conductor pattern 9. The first coils C1A to C4A and the second coils C1B to C4B intersect with each other in a spiral shape, and the respective rotation center lines coincide with each other. As a result, the coils C1 to C4 have a spiral shape around the center line C. The center axis of each through-hole conductor H1, H12 coincides with the circumferential center line C.

  FIG. 4 is a top view of the insulator layer shown in FIG. As shown in FIG. 4, for example, on the insulator layer L5, the first conductor pattern 12b and the second conductor pattern 13b constituting each of the coils C1 to C4 are arranged to face each other with a predetermined distance, A separation portion D is formed between the first conductor pattern 12b and the second conductor pattern 13b. And in the coil part 5, the coil C2 is rotated 90 degree | times centering on the circumference centerline C with respect to the coil C1, and the coil C3 is rotated 90 degree | times centering on the circumference centerline C with respect to the coil C2. The coil C4 is rotated 90 ° around the center line C with respect to the coil C3.

  With such a configuration, in the adjacent coil C1 and coil C2, the second conductor pattern 13b and the separated portion D face each other in the longitudinal direction of the element body 2, and in the coil C2 and coil C3, the length of the element body 2 is long. In the direction, the separated portion D and the first conductor pattern 12b face each other, and in the coil C3 and the coil C4, the second conductor pattern 13b and the separated portion D face each other in the longitudinal direction of the element body 2. That is, in the adjacent coils C1 to C4, the sides of the first conductor patterns 12a to 12d and the second conductor patterns 13a to 13d, the sides of the first conductor patterns 12a to 12d, and the sides of the second conductor patterns 13a to 13d Are not opposite.

  As described above, in the laminated coil component 1 according to the present embodiment, the separation portion D is formed between the first conductor patterns 12a to 12d and the second conductor patterns 13a to 13d on the insulator layers L4 to L7. In the adjacent coils C1 to C4, the separated portion D and the first conductor patterns 12a to 12d or the second conductor patterns 13a to 13d are opposed to each other. Therefore, since the sides of the first conductor patterns 12a to 12d and the second conductor patterns 13a to 13d are not opposed to each other in the adjacent coils C1 to C4, generation of stray capacitance due to these sides can be suppressed, and stray capacitance is reduced. it can.

  In the laminated coil component 1, the coils C1 to C4 are configured by the first coils C1A to C4A and the second coils C1B to C4B connected in parallel, and the first coils C1A to C4A and the second coils C1B to The first conductor patterns 12a to 12d and the second conductor patterns 13a to 13d having the same shape are arranged point-symmetrically around the center line C so that the center line C of C4B coincides. The first coils C1A to C4A have through-hole conductors H2, H4 and one end portions of the first conductor pattern 12 and one end portions of the other first conductor patterns 12 arranged via the insulator layers L4 to L7. The second coils C1B to C4B are configured to be connected in series by H6 and H8, and the second coils C1B to C4B have one end of the second conductor pattern 13 and one end of another second conductor pattern 13 disposed via the insulator layers L4 to L7. Are connected in series by through-hole conductors H3, H5, H7, and H9.

  Therefore, in the laminated coil component 1, there is almost no portion where the conduction path becomes narrow (the cross-sectional area becomes small) in the connection conductors constituting the first coils C1A to C4A and the second coils C1B to C4B. Reduction can be achieved. Further, in the laminated coil component 1, the first conductor patterns 12a to 12d and the second conductor patterns 13a to 13d overlap each other in the laminating direction of the insulating layers L4 to L7, as compared with the conventional laminated coil components. The stray capacitance due to the patterns 12a to 12d and the second conductor patterns 13a to 13d can be reduced.

  In such a laminated coil component 1, since the stray capacitance can be reduced as described above, the following characteristics can be obtained. FIG. 5 is a diagram showing the relationship between frequency and impedance. In FIG. 5, the solid line indicates the characteristic of the conventional laminated coil, and the alternate long and short dash line indicates the characteristic of the laminated coil of the present embodiment. As shown in FIG. 5, in the laminated coil component 1 of the present embodiment, the characteristics can be shifted to a high frequency band as compared with the conventional laminated coil by reducing the stray capacitance (C value).

[Second Embodiment]
Next, the second embodiment will be described. FIG. 6 is an exploded perspective view of the element body of the multilayer coil component according to the second embodiment, and FIG. 7 is a perspective view showing a coil constituted by the coil conductor shown in FIG.

  As shown in FIG. 6, the element body 20 is configured by laminating a plurality of (here, 14) rectangular insulator layers L20 to L33. Inside the element body 20, four coils C <b> 11 to C <b> 14 are configured by laminating a conductor pattern printed on a ferrite green sheet, and these coils C <b> 11 to C <b> 14 are arranged in the longitudinal direction of the element body 20. They are juxtaposed in the direction facing the end faces 2a and 2b or the direction perpendicular to the stacking direction.

  In addition, inside the element body 20, lead portions 21 and 22 that lead out the coils C <b> 11 to C <b> 14 in the stacking direction and electrically connect the external electrodes 3 and 4 (see FIG. 1) and the coils C <b> 11 to C <b> 14, The first connection conductor pattern 23 and the second connection conductor pattern 24 that electrically connect the coils C11 to C14 and the lead portions 21 and 22, respectively, are disposed. The conductors are connected to each other by through-hole conductors in the stacking direction. Each of the coils C11 to C14 includes a first coil C11A to C14A and a second coil C11B to C14B, respectively. The center line C of the coils C11 to C14 extends in the stacking direction.

  The lead-out portion 22 is configured by laminating a plurality (here, two layers) of insulator layers L20 and L21. A lead conductor 25 is formed on the surface of the insulating layer L20. The lead conductors 25 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically connected to the external electrode 3. The lead conductors 25 are electrically insulated from each other.

  A lead conductor 26 is formed on the surface of the insulating layer L21. The lead conductors 26 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other. The lead conductor 26 is electrically connected to a through-hole conductor H20 formed through the insulator layer L21 in the thickness direction. The lead conductor 26 is electrically connected to the adjacent first connection conductor pattern 23 via the through-hole conductor H20 in a stacked state. The lead conductor 25 and the lead conductor 26 are electrically connected by a through-hole conductor (not shown) to form a lead portion 22.

  A first connection conductor pattern 23 is formed on the surface of the insulator layer L22. The first connection conductor pattern 23 is a portion that connects the first coils C11A to C14A and the second coils C11B to C14B in parallel, and is formed in a straight line shape (I shape). The first connection conductor patterns 23 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other. Both ends of the first connection conductor pattern 23 are electrically connected to through-hole conductors H21 and H22 formed through the insulator layer L22 in the thickness direction. The first connection conductor pattern 23 is electrically connected to one end of the adjacent first conductor pattern 27a and one end of the second conductor pattern 28a via the through-hole conductors H21 and H22 in a stacked state. The central portion of the first connection conductor pattern 23 is a region that is electrically connected to the through-hole conductor H20 in a stacked state. This region has a substantially circular shape and is formed wider than the width of the conductor pattern. Hereinafter, the region electrically connected to the through-hole conductor has the same configuration.

  A first conductor pattern 27a and a second conductor pattern 28a are formed on the surface of the insulator layer L23. A set of the first conductor pattern 27a and the second conductor pattern 28a is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 27a constitutes the first coils C11A to C14A, and is formed in a substantially L shape on the insulator layer L23. The first conductor pattern 27a corresponds to approximately 3/8 turn of the first coils C11A to C14A. One end of the first conductor pattern 12a is a region electrically connected to the through-hole conductor H21 in a stacked state. The other end of the first conductor pattern 27a is electrically connected to a through-hole conductor H23 formed through the insulating layer L23 in the thickness direction. The first conductor pattern 27a is electrically connected to the other end of the adjacent first conductor pattern 27b through the through-hole conductor H23 in a stacked state.

  The second conductor pattern 28a constitutes the second coils C11B to C14B and is formed in an approximately L shape on the insulator layer L23. The second conductor pattern 28a corresponds to approximately 3/8 turn of the second coils C11B to C14B. One end of the second conductor pattern 13a is a region electrically connected to the through-hole conductor H22 in a stacked state. The other end of the second conductor pattern 28a is electrically connected to a through-hole conductor H24 formed through the insulating layer L23 in the thickness direction. The second conductor pattern 28a is electrically connected to the other end of the adjacent second conductor pattern 28b through the through-hole conductor H24 in a stacked state.

  Each first conductor pattern 27a and each second conductor pattern 28a have the same shape, have a predetermined interval on the insulator layer L23, and center around the center line C of the coils C11 to C14. They are arranged point-symmetrically. Specifically, the long side portion of the first conductor pattern 27a and the long side portion of the second conductor pattern 28a are arranged to face each other, and the short side portion of the first conductor pattern 27a and the second conductor pattern 28a The short side portion is arranged to face. The long side portion of the first conductor pattern 27a and the long side portion of the second conductor pattern 28a in the coils C11 and C13 are formed along a pair of opposing sides S1 and S2 of the insulator layer L23. The short side portion of the conductor pattern 27a and the short side portion of the second conductor pattern 28a are arranged along a pair of opposing sides S3 and S4 of the insulator layer L23. The long side portion of the first conductor pattern 27a and the long side portion of the second conductor pattern 28a in the coils C12 and C14 are formed along a pair of opposing sides S3 and S4 of the insulator layer L23. The short side portion of the conductor pattern 27a and the short side portion of the second conductor pattern 28a are arranged along a pair of opposing sides S1 and S2 of the insulator layer L23.

  A first conductor pattern 27b and a second conductor pattern 28b are formed on the surface of the insulator layer L24. A set of the first conductor pattern 27b and the second conductor pattern 28b is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 27b constitutes the first coils C11A to C14A, and is formed in a substantially L shape on the insulator layer L24. The first conductor pattern 27b corresponds to approximately 3/8 turn of the first coils C11A to C14A. One end of the first conductor pattern 27b is electrically connected to a through-hole conductor H25 formed through the insulator layer L24 in the thickness direction. The first conductor pattern 27b is electrically connected to one end of the adjacent first conductor pattern 27c through the through-hole conductor H25 in a stacked state. The other end of the first conductor pattern 27b is a region electrically connected to the through-hole conductor H23 in a stacked state.

  The second conductor pattern 28b constitutes the second coils C11B to C14B and is formed in a substantially L shape on the insulator layer L24. The second conductor pattern 28b corresponds to approximately 3/8 turn of the second coils C11B to C14B. One end of the second conductor pattern 28b is electrically connected to a through-hole conductor H26 formed through the insulator layer L24 in the thickness direction. The second conductor pattern 28b is electrically connected to one end of the adjacent second conductor pattern 28c through the through-hole conductor H26 in a stacked state. The other end of the second conductor pattern 28b is a region electrically connected to the through-hole conductor H24 in a stacked state.

  Each first conductor pattern 27b and each second conductor pattern 28b have the same shape, have a predetermined interval on the insulating layer L5, and center around the center line C of the coils C11 to C14. They are arranged point-symmetrically. The long side portion of the first conductor pattern 27b and the long side portion of the second conductor pattern 28b in the coils C11 and C13 are formed along a pair of opposing sides S1 and S2 of the insulator layer L24. The short side portion of the conductor pattern 27b and the short side portion of the second conductor pattern 28b are arranged along a pair of opposing sides S3 and S4 of the insulator layer L24. The long side portion of the first conductor pattern 27b and the long side portion of the second conductor pattern 28b in the coils C12 and C14 are formed along a pair of opposing sides S3 and S4 of the insulator layer L24. The short side portion of the conductor pattern 27b and the short side portion of the second conductor pattern 28a are arranged along a pair of opposing sides S1 and S2 of the insulator layer L24.

  A first conductor pattern 27c and a second conductor pattern 28c are formed on the surface of the insulating layer L25. A set of the first conductor pattern 27c and the second conductor pattern 28c is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 27c constitutes the first coils C11A to C14A and is formed in a substantially L shape on the insulator layer L25. The first conductor pattern 27c corresponds to approximately 3/8 turn of the first coils C11A to C14A. One end of the first conductor pattern 27c is a region electrically connected to the through-hole conductor H25 in a stacked state. The other end of the first conductor pattern 27c is electrically connected to a through-hole conductor H27 formed through the insulator layer L25 in the thickness direction. The first conductor pattern 27c is electrically connected to the other end of the adjacent first conductor pattern 27d via the through-hole conductor H27 in a stacked state.

  The second conductor pattern 28c constitutes the second coils C11B to C14B and is formed in an approximately L shape on the insulator layer L25. The second conductor pattern 28c corresponds to approximately 3/8 turn of the second coils C11B to C14B. One end of the second conductor pattern 28c is a region electrically connected to the through-hole conductor H26 in a stacked state. The other end of the second conductor pattern 28c is electrically connected to a through-hole conductor H28 formed so as to penetrate in the thickness direction of the insulator layer L25. The second conductor pattern 28c is electrically connected to the other end of the adjacent second conductor pattern 28d through the through-hole conductor H28 in a stacked state.

  Each first conductor pattern 27c and each second conductor pattern 28c have the same shape, have a predetermined interval on the insulator layer L25, and center around the center line C of the coils C11 to C14. They are arranged point-symmetrically. The long side portion of the first conductor pattern 27c and the long side portion of the second conductor pattern 28c in the coils C11 and C13 are formed along a pair of opposing sides S3 and S4 of the insulator layer L25. The short side portion of the conductor pattern 27c and the short side portion of the second conductor pattern 28c are arranged along a pair of opposing sides S1 and S2 of the insulator layer L25. The long side portion of the first conductor pattern 27c and the long side portion of the second conductor pattern 28c in the coils C12, 14 are formed along a pair of opposing sides S1, S2 of the insulator layer L25. The short side portion of the conductor pattern 27c and the short side portion of the second conductor pattern 28c are arranged along a pair of opposing sides S3 and S4 of the insulator layer L25.

  A first conductor pattern 27d and a second conductor pattern 28d are formed on the surface of the insulating layer L26. A set of the first conductor pattern 27d and the second conductor pattern 28d is juxtaposed in the longitudinal direction with a predetermined distance from each other, and is electrically insulated from each other. The first conductor pattern 27d constitutes the first coils C11A to C14A, and is formed in a substantially L shape on the insulator layer L26. The first conductor pattern 27d corresponds to approximately 3/8 turn of the first coils C11A to C14A. One end of the first conductor pattern 27d is electrically connected to a through-hole conductor H29 formed through the insulator layer L26 in the thickness direction. The other end of the first conductor pattern 27d is electrically connected to one end of the adjacent first conductor pattern 27e via the through-hole conductor H29 in a stacked state. The other end of the first conductor pattern 27d is a region electrically connected to the through-hole conductor H27 in a stacked state.

  The second conductor pattern 28d constitutes the second coils C11B to C14B, and is formed in a substantially L shape on the insulator layer L26. The second conductor pattern 28d corresponds to approximately 3/8 turn of the second coils C11B to C14B. One end of the second conductor pattern 28d is electrically connected to a through-hole conductor H30 formed through the insulator layer L26 in the thickness direction. The second conductor pattern 28d is electrically connected to one end of the adjacent second conductor pattern 28e through the through-hole conductor H30 in a stacked state. The other end of the second conductor pattern 28d is a region electrically connected to the through-hole conductor H28 in a stacked state.

  Each first conductor pattern 27d and each second conductor pattern 28d have the same shape, have a predetermined interval on the insulator layer L26, and center around the center line C of the coils C11 to C14. They are arranged point-symmetrically. The long side portion of the first conductor pattern 27d and the long side portion of the second conductor pattern 28d in the coils C11 and C13 are formed along a pair of opposing sides S3 and S4 of the insulator layer L26. The short side portion of the conductor pattern 27d and the short side portion of the second conductor pattern 28d are arranged along a pair of opposing sides S1 and S2 of the insulator layer L26. The long side portion of the first conductor pattern 27d and the long side portion of the second conductor pattern 28d in the coils C12, 14 are formed along a pair of opposing sides S1, S2 of the insulator layer L26. The short side portion of the conductor pattern 27d and the short side portion of the second conductor pattern 28d are arranged along a pair of opposing sides S3 and S4 of the insulator layer L26.

  A first conductor pattern 27e and a second conductor pattern 28e are formed on the surface of the insulator layer L27, and the first conductor pattern 27e and the second conductor pattern 28e are the first conductor pattern 27a and the second conductor pattern 28a. It has the same composition as. A first conductor pattern 27f and a second conductor pattern 28f are formed on the surface of the insulator layer L28. The first conductor pattern 27f and the second conductor pattern 28f are the first conductor pattern 27b and the second conductor pattern 28b. It has the same composition as. A first conductor pattern 27g and a second conductor pattern 28g are formed on the surface of the insulating layer L29, and the first conductor pattern 27g and the second conductor pattern 28g are the first conductor pattern 27c and the second conductor pattern 28c. It has the same composition as. A first conductor pattern 27h and a second conductor pattern 28h are formed on the surface of the insulating layer L30, and the first conductor pattern 27h and the second conductor pattern 28h are the first conductor pattern 27d and the second conductor pattern 28d. It has the same composition as.

  The first conductor pattern 27e and the first conductor pattern 28f are electrically connected by a through-hole conductor H31, and the second conductor pattern 28e and the second conductor pattern 28f are electrically connected by a through-hole conductor H32. Has been. The first conductor pattern 27f and the first conductor pattern 27g are electrically connected by a through-hole conductor H33, and the second conductor pattern 28f and the second conductor pattern 28g are electrically connected by a through-hole conductor H34. Has been. The first conductor pattern 27g and the first conductor pattern 27h are electrically connected by a through-hole conductor H35, and the second conductor pattern 28g and the second conductor pattern 28h are electrically connected by a through-hole conductor H36. Has been.

  A second connection conductor pattern 24 is formed on the surface of the insulator layer L31. The second connection conductor pattern 24 is a portion that connects the first coils C11A to C14A and the second coils C11B to C14B in parallel, and is formed in a linear shape. The second connection conductor patterns 24 are arranged in parallel in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other. Both ends of the second connection conductor pattern 24 are stacked and electrically connected to the through-hole conductor H37 formed at one end of the first conductor pattern 27h and the through-hole conductor H38 formed at one end of the second conductor pattern 28h. It is an area to be connected. The center portion of the second connection conductor pattern 24 is electrically connected to a through-hole conductor H39 formed through the insulator layer L31 in the thickness direction. The second connection conductor pattern 24 is electrically connected to the adjacent lead conductor 29 via the through-hole conductor H39 in a stacked state.

  The lead-out portion 22 is configured by laminating a plurality (here, two layers) of insulator layers L32 and L33. A lead conductor 29 is formed on the surface of the insulating layer L32. The lead conductor 29 is a region electrically connected to the through-hole conductor H39 in a stacked state. The respective lead conductors 29 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically insulated from each other.

  A lead conductor 30 is formed on the surface of the insulator layer L33. The lead conductors 30 are juxtaposed in the longitudinal direction with a predetermined distance from each other, and are electrically connected to the external electrode 4. The lead conductors 30 are electrically insulated from each other. The lead conductor 29 and the lead conductor 30 are electrically connected by a through-hole conductor (not shown) to form a lead portion 22.

  By laminating the insulator layers L20 to L33, the first conductor patterns 27a to 27h are connected in series, the second conductor patterns 28a to 28h are connected in series, and the coil C11 is provided inside the element body 20. To C14 (first coils C11A to C14A and second coils C11B to C14B) are formed. As shown in FIG. 7, the coils C11 to C14 are configured by first coils C11A to C14A and second coils C11B to C14B. The first coils C11A to C14A and the second coils C11B to C14B are connected in parallel by the first connection conductor pattern 23 and the second connection conductor pattern 24. The first coils C11A to C14A and the second coils C11B to C14B intersect with each other in a spiral shape, and the respective rotation center lines coincide with each other. As a result, the coils C11 to C14 are formed in a spiral shape around the rotation center line C. The center axes of the through-hole conductors H20 and H39 coincide with the circuit center line C.

  FIG. 8 is a top view of the insulator layer shown in FIG. As shown in FIG. 8, for example, on the insulator layer L24, the first conductor pattern 27b and the second conductor pattern 28b constituting each of the coils C11 to C14 are arranged to face each other with a predetermined distance, A separation portion D is formed between the first conductor pattern 27b and the second conductor pattern 28b. And in the coil part 31, the coil C12 is rotated 90 degree | times centering on the circumference centerline C with respect to the coil C11, and the coil C13 is rotated 90 degree | times centering on the circumference centerline C with respect to the coil C12. The coil C14 is arranged so as to be rotated by 90 ° about the circling center line C with respect to the coil C12.

  With such a configuration, in the adjacent coil C11 and coil C12, the second conductor pattern 28b and the separated portion D face each other in the longitudinal direction of the element body 20, and in the coils C2 and C3, the length of the element body 2 is long. In the direction, the separated portion D and the first conductor pattern 27b face each other, and in the coil C3 and the coil C4, the second conductor pattern 28b and the separated portion D face each other in the longitudinal direction of the element body 2.

  As described above, in the laminated coil component including the element body 20, the separated portion D is formed between the first conductor patterns 27a to 27h and the second conductor patterns 28a to 28h on the insulator layers L23 to L30. In the adjacent coils C11 to C14, the separated portion D and the first conductor patterns 27a to 27h or the second conductor patterns 28a to 28h are opposed to each other. Therefore, since the sides of the first conductor patterns 27a to 27h and the second conductor patterns 28a to 28h are not opposed to each other in the adjacent coils C11 to C14, generation of stray capacitance due to these sides can be suppressed, and stray capacitance is reduced. it can.

  Moreover, in this laminated coil component, each coil C11-C14 is comprised by 1st coil C11A-C14A and 2nd coil C11B-C14B connected in parallel, 1st coil C11A-C14A and 2nd coil C11B- The first conductor patterns 27a to 27h and the second conductor patterns 28a to 28h having the same shape are arranged point-symmetrically around the center line C so that the center line C of C14B coincides. The first coils C11A to C14A have through-hole conductors H23, H25, one end portion of the first conductor pattern 27 and one end portion of the other first conductor pattern 27 arranged via the insulator layers L23 to L30. H27, H29, H31, H33, and H35 are connected in series, and the second coils C11B to C14B are connected to the other end of the second conductor pattern 28 and other insulating layers L23 to L30. One end of the two conductor pattern 28 is connected in series by through-hole conductors H24, H26, H28, H30, H32, H34, and H36.

  Therefore, in this laminated coil component, there is almost no portion where the conduction path becomes narrow (the cross-sectional area becomes small) in the connection conductors constituting the first coils C11A to C14A and the second coils C11B to C14B. Reduction can be achieved.

  The present invention is not limited to the above embodiment. For example, the structure shown in FIG. 9 may be sufficient as a coil. FIG. 9 is a perspective view showing a coil according to a modification. As shown in FIG. 9, the coil 60 includes a first coil 60A composed of first conductor patterns 61a to 61h, a second coil 60B composed of second conductor patterns 62a to 62h, and third conductor patterns 63a to 63h. The third coil 60C is configured to include a fourth coil 60D configured from the fourth conductor patterns 64a to 64h. The first conductor patterns 61a to 61h and the second conductor patterns 62a to 62h are point symmetric about the circuit center line C on the insulator layer, and the third conductor patterns 63a to 63h and the fourth conductor patterns 64a to 64a. 64h is point-symmetric about the circumference center line C on the insulator layer. Each conductor pattern is electrically connected by a through-hole conductor.

  Moreover, in the said embodiment, 1st coil C1A-C4A, C11A-C14A and 2nd coil C1B-C4B, C11B-C14B are connected by the 1st extraction conductor patterns 8 and 24 and the 2nd extraction conductor patterns 9 and 25. Although connected to the lead-out portions 6, 7, 22, 23, the first coils C1A to C4A, C11A to C14 and the second coils C1B to C4B, C11B to C14B are directly connected to the external electrodes 3 and 4. There may be.

  In the laminated coil component of the above embodiment, a plurality of insulator layers on which conductor patterns and through-hole conductors are formed are laminated. However, the laminated coil component is formed of a conductor paste directly on an insulator green sheet. And an insulating paste may be alternately printed and stacked.

  DESCRIPTION OF SYMBOLS 1 ... Laminated coil component, 2,20 ... Element body, 2a, 2b ... End face, 2c-2f ... Side face, 3, 4 ... External electrode, 12a-12d, 27a-27h, 61a-61h ... First conductor pattern (first 1 coil conductor), 13a to 13d, 28a to 28h, 61a to 61h ... second conductor pattern (second coil conductor), C ... circuit center line, C1 to C4, C11 to C14, 60 ... coil, C1A to C4A, C11A-C14A, 60A ... 1st coil, C1B-C4B, C11B-C14B, 60B ... 2nd coil, L1-L10, L20-L33 ... insulator layer.

Claims (4)

An element body formed by laminating a plurality of insulator layers;
A plurality of coils juxtaposed inside the element body;
A plurality of external electrodes formed on the surface of the element body and connected to both ends of each of the plurality of coils;
The plurality of coils include a spiral first coil configured by connecting a plurality of first coil conductors in series, a plurality of second coil conductors connected in series, and the first coil. Each including a spiral second coil connected in parallel,
The first coil conductor and the second coil conductor have the same shape, and the same centering on the circumference center line so that the circumference center lines of the first coil and the second coil coincide with each other. They are arranged point-symmetrically on the insulator layer,
A spaced-apart portion is formed between the first coil conductor and the second coil conductor disposed symmetrically on the insulator layer,
In the adjacent coils in the element body, the spaced-apart portion and the first coil conductor or the second coil conductor face each other.   2. The laminated coil component according to claim 1, wherein the adjacent coils are arranged such that the other coil is rotated by approximately 90 ° about the circuit center line with respect to one of the coils.   The multilayer coil component according to claim 1 or 2, wherein the first coil conductor and the second coil conductor have a linear shape. The element body includes a pair of end surfaces facing each other, a pair of main surfaces extending so as to connect the pair of end surfaces, and a stacking direction of the plurality of insulator layers extending so as to connect the pair of main surfaces. And a pair of side surfaces opposed to each other,
The plurality of external electrodes are respectively formed on the pair of side surfaces,
The laminated coil component according to any one of claims 1 to 3, wherein a center line of the plurality of coils extends in a direction opposite to the pair of side surfaces.

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