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JP-2026076234-A - Inductor components

JP2026076234AJP 2026076234 AJP2026076234 AJP 2026076234AJP-2026076234-A

Abstract

[Problem] To provide an inductor component that improves the efficiency of acquiring inductance. [Solution] The inductor component 1 includes a plurality of first coil wirings 11b arranged along the axis AX on a plane parallel to the first main surface 100b, a plurality of second coil wirings 11t arranged along the axis on a plane parallel to the second main surface, a plurality of first through wirings 13 extending from the first coil wiring toward the second coil wiring and arranged along the axis, and a plurality of second through wirings 14 extending from the first coil wiring toward the second coil wiring, provided on the opposite side of the axis from the first through wiring, and arranged along the axis. The first coil wiring, the first through wiring, the second coil wiring, and the second through wiring are connected in this order to form at least a part of a spiral, and the first through wiring and the second through wiring are non-parallel when viewed from the axial direction. [Selection Diagram] Figure 1

Inventors

  • 加茂 秀基
  • 吉岡 由雅
  • 高松 剛

Assignees

  • 株式会社村田製作所

Dates

Publication Date
20260511
Application Date
20260120
Priority Date
20221102

Claims (20)

  1. A base body including a first principal surface and a second principal surface that are opposite to each other, A coil provided on the aforementioned body and wound spirally along the axis, The body comprises a first external electrode and a second external electrode, which are provided on the body and electrically connected to the coil, The shaft of the coil is arranged parallel to the first main surface. The aforementioned coil is A plurality of first coil wirings are provided on the first main surface side with respect to the shaft and are arranged along the shaft on a plane parallel to the first main surface, A plurality of second coil wirings are provided on the second main surface side with respect to the shaft and are arranged along the shaft on a plane parallel to the second main surface, A plurality of first through-wirings extending from the first coil wiring toward the second coil wiring and arranged along the axis, It includes a plurality of second through-wirings that extend from the first coil wiring toward the second coil wiring, are provided on the opposite side of the shaft from the first through-wiring, and are arranged along the shaft, The first coil wiring, the first through wiring, the second coil wiring, and the second through wiring are connected in this order to form at least a portion of the helical shape. An inductor component in which the first through-wiring and the second through-wiring are non-parallel when viewed from the axial direction.
  2. The inductor component according to claim 1, wherein the first through-wiring and the second through-wiring are symmetrical with respect to the axis when viewed from a direction perpendicular to the first main surface.
  3. The inductor component according to claim 1 or 2, wherein the first through-wiring and the second through-wiring are symmetrical with respect to a line perpendicular to the first main surface and containing the axis, as viewed from the axial direction.
  4. The inductor component according to any one of claims 1 to 3, wherein the line edge roughness of the first through-wiring is greater than the line edge roughness of the first coil wiring.
  5. The inductor component according to any one of claims 1 to 3, wherein the line edge roughness of the first through-wiring is equal to or less than the line edge roughness of the first coil wiring.
  6. The inductor component according to claim 1, wherein the widths of the first through-wiring and the second through-wiring are different.
  7. The first through-wiring has an outer peripheral portion that, when viewed from the axial direction, is located radially outside the coil compared to the first coil wiring and the second coil wiring. The inductor component according to any one of claims 1 to 6, wherein the outer peripheral portion is arranged between 0.3 and 0.7 in height in a direction perpendicular to the first main surface of the base body, with reference to the first main surface.
  8. A second coil is provided on the aforementioned body and is wound spirally along a second axis parallel to the aforementioned axis, The substrate further comprises a third external electrode and a fourth external electrode, which are provided on the substrate and electrically connected to the second coil, The second coil is, A plurality of third coil wirings are provided on the first main surface side with respect to the second axis and are arranged along the second axis on a plane parallel to the first main surface, A plurality of fourth coil wirings are provided on the second main surface side with respect to the second axis and are arranged along the second axis on a plane parallel to the second main surface, A plurality of third through-wirings extending from the third coil wiring toward the fourth coil wiring and arranged along the second axis, It includes a plurality of fourth through-wirings that extend from the third coil wiring toward the fourth coil wiring, are provided on the opposite side of the second axis from the third through-wiring, and are arranged along the second axis, The third coil wiring, the third through wiring, the fourth coil wiring, and the fourth through wiring are connected in this order to constitute at least a portion of the spiral shape of the second coil. The inductor component according to any one of claims 1 to 7, wherein the second through-wiring and the third through-wiring are adjacent to each other.
  9. The inductor component according to claim 8, wherein, viewed from the axial direction of the coil, the first through-wiring, the second through-wiring, the third through-wiring, and the fourth through-wiring are symmetrical with respect to the center line between the coil and the second coil.
  10. The inductor component according to claim 8 or 9, wherein, viewed from the axial direction of the coil, the second through-wiring and the third through-wiring are arranged in parallel.
  11. The inductor component according to claim 9, wherein the first through-wiring and the second through-wiring are asymmetrical with respect to a line perpendicular to the first main surface and containing the axis, as viewed from the axial direction.
  12. The inductor component according to claim 8, wherein the third through-wiring and the fourth through-wiring are non-parallel when viewed from the second axial direction.
  13. The first through-wiring has a first connection surface connected to the first coil wiring and a second connection surface connected to the second coil wiring. The first external electrode is provided on the first main surface side and, when viewed from a direction perpendicular to the first main surface, overlaps at least a portion of the first connecting surface. The inductor component according to any one of claims 1 to 12, wherein, when viewed from the axial direction, the inclination angle on the axial side between the line connecting the center of the first connection surface and the center of the second connection surface and the connection surface connected to the first through-wiring of the second coil wiring is 60° or more and less than 90°.
  14. The inductor component according to claim 13, wherein, when viewed from a direction perpendicular to the first main surface, a portion of the first connecting surface and a portion of the second connecting surface overlap.
  15. The inductor component according to claim 13 or 14, wherein, viewed from a direction perpendicular to the first main surface, the center of the first connection surface is closer to the axis than the center of the second connection surface.
  16. The inductor component according to any one of claims 1 to 15, wherein the first through-wiring comprises a conductive layer located on the outer periphery when viewed from the direction in which the first through-wiring extends, and a non-conductive layer located inside the conductive layer.
  17. The inductor component according to any one of claims 1 to 16, wherein the cross-sectional area of at least one end of the first through-wiring in the extending direction is greater than the cross-sectional area of the central part of the first through-wiring in the extending direction.
  18. The inductor component according to any one of claims 1 to 17, wherein the thickness of the inductor component is 200 μm or less.
  19. The inductor component according to any one of claims 1 to 18, wherein, when viewed from a direction perpendicular to the first main surface, the first external electrode and the second external electrode are located inward from the outer circumferential surface of the main body.
  20. Furthermore, the first main surface is provided with an organic insulator, The inductor component according to any one of claims 1 to 19, wherein the base material is an inorganic insulator, and the organic insulator is located inside the outer surface of the inorganic insulator when viewed from a direction perpendicular to the first main surface.

Description

This disclosure relates to inductor components. Conventionally, an inductor component is described in Japanese Patent Publication No. 6652280 (Patent Document 1). This inductor component comprises a base body, a coil provided within the base body and wound axially, and a first external electrode and a second external electrode provided on the base body and electrically connected to the coil. The coil has multiple coil patterns stacked along its axis. Adjacent coil patterns in the axial direction are connected via conductive vias. The coil pattern has a wiring section extending perpendicular to the axis and a pad section at the end of the wiring section that connects to the conductive via. The width of the pad section is wider than the width of the wiring section to improve connectivity between the pad section and the conductive via. Patent No. 6652280 This is a schematic bottom view of the inductor component of the first embodiment, viewed from the bottom side.This is a cross-sectional view taken along line II-II in Figure 1.This is a cross-sectional view taken along line III-III in Figure 1.This is a magnified view of a portion of Figure 2.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a cross-sectional view showing a first modified example of an inductor component.This is a cross-sectional view showing a second modified example of an inductor component.This is a cross-sectional view showing a third modified example of an inductor component.This is a cross-sectional view showing a fourth modified example of an inductor component.This is a cross-sectional view showing a fifth modified example of an inductor component.This is a schematic bottom view of the inductor component of the second embodiment, viewed from the bottom side.This is a cross-sectional view taken along line VIII-VIII in Figure 7.This is a partially enlarged view of Figure 8.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a schematic cross-sectional view illustrating a manufacturing method for inductor components.This is a cross-sectional view showing a first modified example of an inductor component.This is a cross-sectional view showing a second modified example of an inductor component. Hereinafter, an inductor component, which is one aspect of this disclosure, will be described in detail with reference to the illustrated embodiment. Note that some of the drawings are schematic and may not reflect actual dimensions or proportions. <First Embodiment> The inductor component 1 according to the first embodiment will be described below. Figure 1 is a schematic bottom view of the inductor component 1 as seen from the bottom. Figure 2 is a cross-sectional view taken along line II-II in Figure 1. Figure 3 is a cross-sectional view taken along line III-III in Figure 1. In Figure 1, for convenience, the external electrodes are shown as dashed lines. Also, in Figure 1, the main body 10 is shown as transparent so that its structure can be easily understood, but it may be semi-transparent or opaque. 1. Overview of the Configuration The overview of