Inductor component and inductor component mounting substrate

Abstract

The present application relates to an inductor component and an inductor component mounting substrate. A component main body (40) of an inductor component (30) has a mounting surface (41) and a top surface (42). A spiral inductor wiring (50) that advances in the direction of extension of a winding central axis is provided inside the component main body. A first external electrode (60) is connected to a first end of the inductor wiring (50). A second external electrode (70) is connected to a second end of the inductor wiring (50). The component main body has a first inclined surface (45) that is connected to a first end of a first side in the length direction of the mounting surface (41) and that is inclined in such a way that the farther from the first end, the closer to the top surface (42) side. The component main body (40) has a second inclined surface (46) that is connected to a second end of a second side in the length direction of the mounting surface (41) and that is inclined in such a way that the farther from the second end, the closer to the top surface (42) side. The winding central axis extends in a direction that is parallel to the mounting surface (41) and perpendicular to the length direction.

Description

Technical Field

[0001] This disclosure relates to inductor components and inductor component mounting substrates. Background Technology

[0002] The inductor component described in Patent Document 1 has a main body comprising a mounting surface and a top surface facing the mounting surface. When viewed from a direction perpendicular to the mounting surface, the lengths of each side of the top surface are greater than the lengths of each side of the mounting surface. Furthermore, the top surface and the mounting surface are connected by an inclined surface that is inclined relative to the mounting surface. That is, the main body of the component is shaped like a reverse-angled frustum extending from the mounting surface to the top surface.

[0003] Inside the main body of the component, the inductor wiring is wound into a spiral shape. A first external electrode is connected to the first end of the inductor wiring. The first external electrode extends from the mounting surface in the main body across an inclined surface. A second external electrode is connected to the second end of the inductor wiring. The second external electrode extends from the mounting surface across an inclined surface opposite to the first external electrode. The central axis of the coil of the inductor wiring is perpendicular to the mounting surface.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2007-188957

[0005] The inductor component described in Patent Document 1 has a main body that is an inverted frustum-shaped quadrangular pyramid extending from the mounting surface to the top surface. Therefore, it has a larger volume compared to a cuboid-shaped main body with the same area as the mounting surface. This larger volume allows for an increase in the inner diameter of the inductor wiring within the main body.

[0006] In the inductor component described in Patent Document 1, the winding center axis of the inductor wiring extends in a direction perpendicular to the mounting surface. Therefore, the direction of the magnetic flux generated by the current flowing through the inductor wiring is also perpendicular to the mounting surface. Consequently, in the inductor component described in Patent Document 1, even if the inner diameter of the inductor wiring is increased, the magnetic flux will be blocked by the external electrodes extending to the mounting surface and the inclined surface, which may prevent the desired characteristics from being obtained. Summary of the Invention

[0007] To address the aforementioned issues, one aspect of this disclosure is an inductor component comprising: a component body having a mounting surface and a top surface facing the mounting surface; a spiral inductor wiring disposed within the component body and extending along a winding central axis; a first external electrode connected to a first end of the inductor wiring and exposed on the mounting surface; and a second external electrode connected to a second end of the inductor wiring and exposed on the mounting surface. The first external electrode is disposed on a first side in a first direction parallel to the mounting surface, and the second external electrode is disposed on a second side in the first direction opposite to the first side. The component body has: a first inclined surface connected to a first end of the first side of the mounting surface in the first direction, inclined such that it approaches the top surface as it moves further away from the first end; and a second inclined surface connected to a second end of the second side of the mounting surface in the first direction, inclined such that it approaches the top surface as it moves further away from the second end. The winding central axis of the inductor wiring extends along a direction parallel to the mounting surface and perpendicular to the first direction.

[0008] In the above structure, the winding center axis of the inductor wiring extends along a direction parallel to the mounting surface and perpendicular to the first direction. Therefore, the direction of the magnetic flux generated by the current flowing through the inductor wiring is also parallel to the mounting surface and perpendicular to the first direction. With such a direction of magnetic flux, even if the inner diameter of the inductor wiring is increased, the magnetic flux will not be easily blocked by the first external electrode and the second external electrode.

[0009] Suppressing situations where magnetic flux is easily blocked by the first external electrode and the second external electrode. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view showing the mounting substrate of the inductor component.

[0011] Figure 2 This is a side view showing the inductor component.

[0012] Figure 3 This is a bottom view showing the inductor component.

[0013] Figure 4 This is an explanatory diagram illustrating the process of manufacturing inductor components.

[0014] Figure 5 This is a side view showing a modified inductor component.

[0015] Explanation of reference numerals in the attached figures

[0016] 10…Inductor component mounting substrate; 20…Substrate; 21…First wiring; 22…Second wiring; 25…Solder; 30…Inductor component; 40…Component body; 41…Mounting surface; 42…Top surface; 43…First end face; 44…Second end face; 45…First inclined surface; 46…Second inclined surface; 50…Inductor wiring; 51…First straight section; 52…Second straight section; 53…Third straight section; 54…Fourth straight section; 55…Fifth straight section; 56…Sixth straight section; 60…First external electrode; 70…Second external electrode. Detailed Implementation

[0017] The following describes one embodiment of an inductor component mounting substrate on which inductor components are mounted. Furthermore, to facilitate understanding of the drawings, some components are shown enlarged. The dimensional ratios of the components may sometimes differ from the actual dimensions or those shown in other drawings.

[0018] like Figure 1 As shown, the inductor component mounting substrate 10 includes a substrate 20 and an inductor component 30.

[0019] The substrate 20 is plate-shaped. A first wiring 21 is disposed within the substrate 20. The terminal portion 21A of the first wiring 21 is exposed on a first surface of the substrate 20 in the thickness direction. The portion of the terminal portion 21A exposed on the first surface of the substrate 20 is a first pad 21L. Additionally, a second wiring 22 is disposed within the substrate 20. The terminal portion 22A of the second wiring 22 is exposed on the first surface of the substrate 20. The portion of the terminal portion 22A exposed on the first surface of the substrate 20 is a second pad 22L. Furthermore, although not shown in the figure, the first wiring 21 is connected to the non-grounded terminal of the AC power supply. Additionally, the second wiring 22 is connected to the grounded terminal of the AC power supply.

[0020] An inductor component 30 is mounted on the first surface of the substrate 20 via solder 25. The inductor component 30 includes a component body 40, inductor wiring 50, a first external electrode 60, and a second external electrode 70.

[0021] The component body 40 of the inductor component 30 has a mounting surface 41 and a top surface 42 that are parallel to each other, a first end surface 43 and a second end surface 44 that are parallel to each other, a first side surface 47 and a second side surface 48 that are parallel to each other, a first inclined surface 45 and a second inclined surface 46. Furthermore, the component body 40 is hexagonal prism-shaped. When viewed from the axial direction of the hexagonal prism, when the surface of the inductor component 30 is mounted on the substrate 20, one of the six outer surfaces of the component body 40 corresponding to one side of the hexagon becomes the mounting surface 41 facing the first surface of the substrate 20. In the following description, the direction of the central axis of the hexagonal prism-shaped component body 40 is defined as the width direction Wd. The direction perpendicular to the mounting surface 41 is defined as the height direction Td, the side on which the substrate 20 is mounted relative to the mounting surface 41 is defined as the lower side, and the opposite side is defined as the upper side. Furthermore, the direction perpendicular to both the width direction Wd and the height direction Td is defined as the length direction Ld. In this embodiment, the length direction Ld corresponds to the first direction.

[0022] In the main body 40, a first inclined surface 45 is connected to the first end on the first side of the mounting surface 41 along the length direction Ld. The first inclined surface 45 is inclined such that the further away from the first end of the mounting surface 41 along the length direction Ld, the closer it is to the top surface 42. The angle formed by the first inclined surface 45 and the mounting surface 41 is 135 degrees at the center side of the main body 40.

[0023] A first end face 43 is connected to the upper side of the first inclined surface 45 in the height direction Td. The first end face 43 is orthogonal to the length direction Ld. The angle formed by the first end face 43 and the first inclined surface 45, the angle at the center side of the component body 40 is 135 degrees.

[0024] A second inclined surface 46 is connected to the second end of the second side of the mounting surface 41 along the length direction Ld. The second inclined surface 46 is inclined such that the further away from the second end of the mounting surface 41 along the length direction Ld, the closer it is to the top surface 42. The angle formed by the second inclined surface 46 and the mounting surface 41 is 135 degrees at the center side of the component body 40.

[0025] A second end face 44 is connected to the upper side of the second inclined surface 46 in the height direction Td. The second end face 44 is orthogonal to the length direction Ld. The angle formed by the second end face 44 and the second inclined surface 46, the angle at the center side of the main body 40 of the component is 135 degrees.

[0026] A top surface 42 is connected to the upper side of the first end face 43 in the height direction Td and the upper side of the second end face 44 in the height direction Td. The top surface 42 is orthogonal to the height direction Td. That is, the top surface 42 is opposite to the mounting surface 41. In the angle formed by the top surface 42 and the first end face 43, the angle on the center side of the component body 40 is 90 degrees. In the angle formed by the top surface 42 and the second end face 44, the angle on the side of the component body 40 is 90 degrees.

[0027] like Figure 3 As shown, the first side surface of the component body 40 in the width direction Wd becomes a first side surface 47 orthogonal to the mounting surface 41, the first inclined surface 45, the first end surface 43, the second inclined surface 46, the second end surface 44, and the top surface 42. Furthermore, the second side surface of the component body 40 in the width direction Wd becomes a second side surface 48 orthogonal to the mounting surface 41, the first inclined surface 45, the first end surface 43, the second inclined surface 46, the second end surface 44, and the top surface 42.

[0028] like Figure 1 As shown, the component body 40 is constructed by stacking multiple conductive layers and multiple insulating layers in the width direction Wd. The conductive layers are made of conductive materials such as silver and copper, and constitute the inductor wiring 50, the first external electrode body 61 of the first external electrode 60, and the second external electrode body 71 of the second external electrode 70. The insulating layers are made of insulators such as glass, resin, and alumina, and constitute the substrate 80. That is, the component body 40 has a structure in which the inductor wiring 50, the first external electrode body 61, and the second external electrode body 71 are embedded inside the generally hexagonal prism-shaped substrate 80.

[0029] A first external electrode body 61 of a first external electrode 60 is provided on the mounting surface 41 and the first inclined surface 45 of the component body 40. The first external electrode body 61 is plate-shaped and extends from the mounting surface 41 throughout the first inclined surface 45. The first external electrode body 61 is embedded inside the substrate 80. Moreover, the outer surface of the first external electrode body 61 is coplanar with the mounting surface 41 and the first inclined surface 45. Therefore, the outer surface of the first external electrode body 61 is exposed from the substrate 80.

[0030] The end of the first external electrode body 61 on the second side in the length direction Ld is located closer to the first side in the length direction Ld than the center of the mounting surface 41. Therefore, the first external electrode body 61 is positioned closer to the first side than the center of the mounting surface 41 in the length direction Ld. The end of the first side of the first external electrode body 61 in the length direction Ld reaches the end of the first side of the first inclined surface 45 in the length direction Ld. Therefore, the amount of the thickness of the first external electrode body 61 exposed at the lower end of the first end face 43 is [amount missing]. Furthermore, the thickness of the first external electrode body 61 is 15 μm.

[0031] like Figure 2 as well as Figure 3 As shown, the width direction Wd of the first external electrode body 61 is 0.6 to 0.9 times the width direction Wd of the component body 40. In this embodiment, the width direction Wd of the first external electrode body 61 is 0.75 times the width direction Wd of the component body 40. Furthermore, the position of the first external electrode body 61 in the width direction Wd is the center of the component body 40. Therefore, the first end of the first external electrode body 61 in the width direction Wd is far from the first end of the component body 40 in the width direction Wd. Similarly, the second end of the first external electrode body 61 in the width direction Wd is far from the second end of the component body 40 in the width direction Wd.

[0032] like Figure 1 As shown, a first plating layer 62 is stacked on the surface of the first external electrode body 61 that is exposed from the substrate 80. Although the figure is omitted, the first plating layer 62 has a double-layer structure, with a nickel plating layer and a tin plating layer stacked on top of the nickel plating layer.

[0033] A second external electrode body 71 of a second external electrode 70 is provided on the mounting surface 41 and the second inclined surface 46 of the component body 40. The second external electrode body 71 is plate-shaped and extends from the mounting surface 41 throughout the second inclined surface 46. The second external electrode body 71 is embedded inside the substrate 80. Moreover, the outer surface of the second external electrode body 71 is coplanar with the mounting surface 41 and the second inclined surface 46. Therefore, the outer surface of the second external electrode body 71 is exposed from the substrate 80.

[0034] The end of the second external electrode body 71 on its first side in the length direction Ld is located on a second side in the length direction Ld, closer to the center of the mounting surface 41. Therefore, the second external electrode body 71 is positioned on a second side closer to the center of the mounting surface 41 in the length direction Ld. The end of the second side of the second external electrode body 71 in the length direction Ld reaches the end of the second side of the second inclined surface 46 in the length direction Ld. Therefore, the amount of the second external electrode body 71's thickness exposed at the lower end of the second end face 44 is [amount missing]. Furthermore, the thickness of the second external electrode body 71 is 15 μm.

[0035] like Figure 3As shown, the width direction Wd of the second external electrode body 71 is 0.6 to 0.9 times the width direction Wd of the component body 40. In this embodiment, the width direction Wd of the second external electrode body 71 is 0.75 times the width direction Wd of the component body 40. Furthermore, the position of the second external electrode body 71 in the width direction Wd is the center of the component body 40. Therefore, the end of the second external electrode body 71 on the first side of the width direction Wd is away from the end of the component body 40 on the first side of the width direction Wd. Similarly, the end of the second external electrode body 71 on the second side of the width direction Wd is away from the end of the component body 40 on the second side of the width direction Wd.

[0036] A second plating layer 72 is stacked on the outer surface of the second external electrode body 71, above the surface exposed from the substrate 80. Although not shown in the figure, the second plating layer 72 has a double-layer structure, with a nickel plating layer and a tin plating layer stacked on top of a nickel plating layer.

[0037] like Figure 1 As shown, in the inductor component mounting substrate 10, the distance DL from the end of the first side of the first pad 21L in the length direction Ld on the first surface of the substrate 20 to the end of the second side of the second pad 22L in the length direction Ld on the first surface of the substrate 20 is less than or equal to the maximum dimension of the length direction Ld of the inductor component 30. Specifically, the distance DL is the same as the distance from the end of the first side of the first external electrode body 61 in the length direction Ld of the first external electrode 60 to the end of the second side of the length direction Ld of the second external electrode body 71 of the second external electrode 70. That is, in this embodiment, the distance DL is the same as the dimension of the length direction Ld of the component body 40. Furthermore, in this embodiment, the maximum dimension of the length direction Ld of the inductor component 30 is the dimension of the length direction Ld of the inductor component 30 in a cross-section passing through the center of the width direction Wd and perpendicular to the width direction Wd. Therefore, the maximum dimension of the length direction Ld of the inductor component 30 is the dimension from the end of the first side of the length direction Ld of the first external electrode 60 to the end of the second side of the length direction Ld of the second external electrode 70.

[0038] Furthermore, although the illustration is omitted, the width Wd of terminal portion 21A is the same as the width Wd of the first external electrode body 61. Similarly, the width Wd of terminal portion 22A is the same as the width Wd of the second external electrode body 71. Therefore, when viewed from the height Td, terminal portion 21A is within the range of the first external electrode 60. Likewise, when viewed from the height Td, terminal portion 22A is within the range of the second external electrode 70.

[0039] Here, the wiring structure of inductor wiring 50 is described in detail.

[0040] like Figure 1 As shown, when viewed from the width direction Wd, the inductor wiring 50 is centered on a winding center axis CA parallel to the width direction Wd, and passes through a hexagonal trajectory TR similar to the hexagon of the component body 40. That is, when viewed from the width direction Wd, the inductor wiring 50 has a first straight section 51 to a sixth straight section 56 corresponding to each side of the trajectory TR. In this embodiment, multiple conductive layers, each containing a portion of the aforementioned straight sections in the same layer, are stacked to form the inductor wiring 50. The multiple conductive layers are connected through vias (not shown in the figure).

[0041] When viewed from the width direction Wd, the first straight portion 51 of the inductor wiring 50 extends parallel to the mounting surface 41 and is located on the lower side of the center of the component body 40 in the height direction Td.

[0042] A second straight section 52 is connected to the end of the first straight section 51 on the first side of the length direction Ld. When viewed from the width direction Wd, the second straight section 52 extends parallel to the first inclined surface 45. The second straight section 52 extends to the first side of the length direction Ld, which is closer to the end of the mounting surface 41 on the first side of the length direction Ld. The angle formed by the second straight section 52 and the first straight section 51, the angle on the side of the winding center axis CA, is 135 degrees.

[0043] A third straight section 53 is connected to the end of the second straight section 52 on the first side of the length direction Ld. The third straight section 53 is positioned on the first side of the length direction Ld, closer to the end of the mounting surface 41 than the end of the second straight section 52. When viewed from the width direction Wd, the third straight section 53 extends parallel to the first end face 43. The angle formed by the third straight section 53 and the second straight section 52, the angle on the side of the wrapping center axis CA, is 135 degrees.

[0044] A fourth straight section 54 is connected to the upper end of the third straight section 53 in the height direction Td. When viewed from the width direction Wd, the fourth straight section 54 extends parallel to the top surface 42. The first end of the fourth straight section 54 in the length direction Ld is positioned closer to the first end of the length direction Ld than the first end of the mounting surface 41 in the length direction Ld. The second end of the fourth straight section 54 in the length direction Ld is positioned closer to the second end of the length direction Ld than the second end of the mounting surface 41 in the length direction Ld. The angle formed by the fourth straight section 54 and the third straight section 53, the angle on the side of the winding center axis CA, is 90 degrees.

[0045] A fifth straight section 55 is connected to the end of the fourth straight section 54 on the second side of the length direction Ld. When viewed from the width direction Wd, the fifth straight section 55 extends parallel to the second end face 44. The fifth straight section 55 extends to the second side of the length direction Ld, which is closer to the end of the mounting surface 41 than the end of the fourth straight section 54. The angle formed by the fifth straight section 55 and the fourth straight section 54, the angle on the side of the winding center axis CA, is 90 degrees.

[0046] A sixth straight section 56 is connected to the lower end of the fifth straight section 55 in the height direction Td. Viewed from the width direction Wd, the sixth straight section 56 extends parallel to the second inclined surface 46. Most of the second side of the sixth straight section 56 in the length direction Ld is located closer to the second side of the length direction Ld than the end of the mounting surface 41. The angle formed by the sixth straight section 56 and the fifth straight section 55 is 135 degrees. Furthermore, the angle formed by the sixth straight section 56 and the first straight section 51, on the side surrounding the central axis CA, is also 135 degrees. In addition, in… Figure 1 In the cross-section shown, the sixth straight section 56 is disposed in a layer different from the other straight sections.

[0047] In this way, the first straight section 51 to the sixth straight section 56 are repeatedly wound, so that the inductor wiring 50 as a whole becomes a spiral shape that extends along the extension direction of the winding center axis, i.e., the winding center axis CA. Moreover, the winding center axis CA of the inductor wiring 50 extends in a direction perpendicular to the first side surface 47, i.e., the width direction Wd. In addition, when viewed from the width direction Wd, the winding center axis CA is located at the center of the component body 40.

[0048] Among the distances in the longitudinal direction Ld between the inner edges of the winding center axis CA side of the inductor wiring 50, the distance between the inner edges of the third straight portion 53 and the fifth straight portion 55 is the largest. The distance between the inner edges of the third straight portion 53 and the fifth straight portion 55 is larger than the dimension of the mounting surface 41 in the longitudinal direction Ld. That is, in this embodiment, the inner diameter of the inductor wiring 50 in the longitudinal direction Ld is larger than the dimension of the mounting surface 41 in the longitudinal direction Ld. Therefore, the inductor wiring 50 is wound along the longitudinal direction Ld, covering the area from the upper side of the first inclined surface 45, through the upper side of the mounting surface 41, to the upper side of the second inclined surface 46.

[0049] Next, the function of the above-described implementation method will be explained.

[0050] In the inductor component mounting substrate 10, if a voltage is applied from the first wiring 21 of the substrate 20 to the inductor component 30, current flows through the inductor wiring 50. If current flows through the inductor wiring 50, the direction of magnetic flux is substantially the same as that of the inductor wiring 50 in the width direction Wd at the same position as the inductor wiring 50 in the width direction Wd.

[0051] Next, the effects of the above-described embodiments will be explained. Furthermore, the combined effects of the first external electrode 60 and the second external electrode 70 will be described using the first external electrode 60 as an example.

[0052] (1) Assume that the winding center axis CA of the inductor wiring 50 is orthogonal to the mounting surface 41. In this case, the direction of the magnetic flux generated in the inductor component 30 also becomes the direction along the height direction Td. Therefore, as Figure 3 As shown, when viewed from the height direction Td, the larger the proportion occupied by the first external electrode 60, the easier it is for the magnetic flux generated in the inductor component 30 to be shielded by the first external electrode 60. When the inductor component 30 is mounted on the substrate 20 with solder 25, a correspondingly large area of ​​the first external electrode 60 exposed from the substrate 80 is required. Therefore, if the winding center axis CA of the inductor wiring 50 is orthogonal to the mounting surface 41, the magnetic flux generated in the inductor component 30 is easily shielded by the first external electrode 60.

[0053] In contrast, according to the above embodiment, the winding center axis CA of the inductor wiring 50 extends in a direction perpendicular to the first side surface 47. Therefore, as described above, the direction of the magnetic flux generated in the inductor component 30 is also perpendicular to the first side surface 47. Moreover, in the above embodiment, the first external electrode 60 does not extend along the first side surface 47 and the second side surface 48, thus suppressing the magnetic flux from being blocked by the first external electrode 60. Therefore, even if the inner diameter of the inductor wiring 50 is set to reach the upper side of the first inclined surface 45 and the upper side of the second inclined surface 46, the magnetic flux will not be easily blocked by the first external electrode 60.

[0054] (2) According to the above embodiment, the first external electrode 60 extends from the mounting surface 41 and over the first inclined surface 45. Therefore, the surface area of ​​the first external electrode 60 on the mounting surface 41 side is correspondingly larger. As a result, the inductor component 30 can be securely fixed to the substrate 20.

[0055] (3) According to the above embodiment, the first external electrode 60 extends throughout the entire length direction Ld of the first inclined surface 45. Therefore, the first external electrode 60 can be mounted on the substrate 20 by solder 25 over the entire length direction Ld of the first inclined surface 45. Consequently, the inductor component 30 can be easily and securely fixed to the substrate 20.

[0056] Furthermore, even though the first external electrode 60 extends throughout the entire first inclined surface 45, when viewed from the width direction Wd, the proportion of the first external electrode 60 in the component body 40 is not that large. Therefore, the area of ​​the first external electrode 60 facing the substrate 20 can be ensured, and the situation where the first external electrode 60 blocks the magnetic flux along the width direction can be suppressed.

[0057] (4) According to the above embodiment, when viewed from the width direction Wd, the main body 40 of the component is hexagonal. Moreover, the angle formed by two adjacent sides among the six sides is 90 degrees or more. Therefore, compared with the case where the corners of the main body 40 are acute angles, the corners of the main body 40, which are the boundary parts between surfaces, are less likely to be damaged.

[0058] Here, when manufacturing the main body of component 40, such as Figure 4 As shown, a substrate having multiple component bodies 40 is sliced ​​along a straight line. In this case, the multiple component bodies 40 can be arranged in the substrate before slicing, such that the first external electrode body 61 or the second external electrode body 71 of the four component bodies 40 forms a rhombus surrounded by the four external electrode bodies with the exposed surface as the inner side. Therefore, many component bodies 40 can be arranged on the substrate, and the parts that are not component bodies 40 are suppressed to be only the rhombus-shaped parts.

[0059] (5) According to the above embodiment, the inductor wiring 50 includes a first straight portion 51 to a sixth straight portion 56 so as to pass through a hexagonal trajectory TR. Moreover, when viewed from the width direction Wd, the first straight portion 51 extends parallel to the mounting surface 41. Therefore, the first straight portion 51 can be positioned relatively close to the mounting surface 41. Similarly, the second straight portions 52 to the sixth straight portions 56 can also be positioned relatively close to their respective outer surfaces when viewed from the width direction Wd. As a result, the inner diameter of the inductor wiring 50 can be made relatively larger.

[0060] (6) According to the above embodiment, the angle formed by the extension direction of the first straight portion 51 and the extension direction of the second straight portion 52, where the angle on the center side of the component body 40, i.e., the winding center axis CA side of the inductor wiring 50, is 135 degrees. Furthermore, the angle formed by the extension direction of the second straight portion 52 and the extension direction of the third straight portion 53, where the angle on the component body 40 side, i.e., the winding center axis CA side of the inductor wiring 50, is also 135 degrees. Therefore, when the inductor wiring 50 extends from the mounting surface 41 through the first inclined surface 45 to the first end face 43, a sharp bend can be avoided. Therefore, the loss of current flowing through the inductor wiring 50 can be suppressed.

[0061] (7) According to the above embodiment, the thickness of the first external electrode body 61, that is, the distance from the upper end of the first external electrode 60 in the height direction Td to the mounting surface 41, is 15 μm. Therefore, the distance from the upper end of the first external electrode 60 in the height direction Td to the mounting surface 41 is 10 μm or more. Therefore, as... Figure 4As shown, when cutting along the length direction Ld, even if the cutting position accuracy is low, the first external electrode body 61 is not easy to fall off from the component body 40.

[0062] (8) According to the above embodiment, the dimension of the width direction Wd of the first external electrode body 61 is more than 0.6 times and less than 0.9 times the dimension of the width direction Wd of the component body 40. Therefore, in the first external electrode 60, it is possible to suppress the first plating layer 62 from growing excessively from the surface of the first external electrode body 61 to the first side surface 47 and the second side surface 48.

[0063] (9) According to the above embodiment, when viewed from the height direction Td, the terminal portion 21A is within the range of the first external electrode 60. Similarly, when viewed from the height direction Td, the terminal portion 22A is within the range of the second external electrode 70. Therefore, in the inductor component mounting substrate 10, when the inductor component 30 is mounted on the substrate 20, the space on the substrate 20 can be utilized more effectively.

[0064] (10) According to the above embodiment, the solder 25 can be disposed in the space below the first inclined surface 45. Therefore, when the inductor component 30 is viewed from the height direction Td, the solder 25 is less likely to be exposed to the outside of the inductor component 30. As a result, when the inductor component 30 is mounted on the substrate 20, it is not necessary to excessively extend the spacing with other components.

[0065] The above embodiments can be implemented by modifications as follows. The above embodiments and the following modifications can be combined and implemented within the scope of technical inconsistency.

[0066] • In the substrate 20 of the inductor component mounting substrate 10, the arrangement of the terminal portion 21A of the first wiring 21 and the terminal portion 22A of the second wiring 22 is not limited to the examples of the above embodiments. For example, the distance DL from the end of the first side of the first wiring 21 in the length direction Ld of the first surface of the substrate 20 to the end of the second side of the second wiring 22 in the length direction Ld of the first surface of the substrate 20 may be larger than the dimension of the length direction Ld of the inductor component 30.

[0067] The shape of the component body 40 is not limited to the examples of the above embodiments, as long as it has a mounting surface 41, a first inclined surface 45, and a second inclined surface 46. For example, when viewed from the width direction Wd, the component body 40 may also be a trapezoidal shape in which the mounting surface 41 is smaller than the top surface 42. In this case, the upper ends of the first inclined surface 45 and the second inclined surface 46 are connected by the top surface 42.

[0068] • The shape of the main body 40 may not be symmetrical about the first and second sides in the width direction Wd, but rather about the center of the width direction Wd. For example, the angles of the first inclined surface 45 relative to the mounting surface 41 and the second inclined surface 46 relative to the mounting surface 41 may also be different.

[0069] In the inductor wiring 50, the angle formed by two adjacent straight sections is not limited to the example of the above embodiment. For example, the angle formed by the first straight section 51 and the second straight section 52, and the angle formed by the second straight section 52 and the third straight section 53, may sometimes deviate by about 10 degrees due to manufacturing errors. Therefore, as long as the angle formed by the first straight section 51 and the second straight section 52, and the angle formed by the second straight section 52 and the third straight section 53, is between 125 degrees and 145 degrees, the current flowing through the inductor wiring 50 can be suppressed from abruptly changing direction, just like in the above embodiment. Furthermore, the angle formed by the first straight section 51 and the second straight section 52 can be smaller than 125 degrees or larger than 145 degrees. Similarly, the angle formed by the second straight section 52 and the third straight section 53 can be smaller than 125 degrees or larger than 145 degrees.

[0070] • In the inductor wiring 50, the connection between straight sections can also be connected via curved sections. In this case, the connection between straight sections can also become smooth without forming angles, as in the embodiment described above.

[0071] The structure of the inductor wiring 50 is not limited to the examples described above. For example, when viewed from the width direction Wd, the inductor wiring 50 may also follow a circular or elliptical path. Furthermore, the inductor wiring 50 may also have a shape that includes both straight and curved portions.

[0072] The shape of the inductor wiring 50 can be any spiral extending along the direction of the winding center axis CA. The spiral shape extending along the direction of the winding center axis CA of the inductor wiring 50 is not limited to a spiral structure with less than one turn around the winding center axis CA in each layer, but can also be a vortex structure with more than one turn around the winding center axis CA in each layer.

[0073] The width Wd of the first external electrode body 61 can be smaller than 0.6 times or larger than 0.9 times the width Wd of the component body 40. If the dimensions of the component body 40 are relatively large, the inductor component 30 can be securely fixed to the substrate 20 even if the width Wd of the first external electrode body 61 is relatively small compared to the width Wd of the component body 40. Furthermore, even if the dimensions of the component body 40 are relatively small, if the width Wd of the first external electrode body 61 is relatively large compared to the width Wd of the component body 40, it is possible to prevent the inductor component 30 from being difficult to fix to the substrate 20. The same applies to the width Wd of the second external electrode body 71.

[0074] The thickness of the first external electrode body 61 is not limited to the examples of the above embodiments. The thickness of the first external electrode body 61 can also be thinner than 10 μm. In this case, the amount of substrate 80 can be increased while maintaining the same volume of inductor component 30. The same applies to the thickness of the second external electrode body 71.

[0075] The exposed portion of the first external electrode 60 is not limited to the examples of the above embodiments. For example, the first end of the first external electrode 60 in the longitudinal direction Ld may also be located midway along the first inclined surface 45. Alternatively, the first external electrode 60 may be exposed only at the mounting surface 41. Furthermore, the first external electrode 60 may be exposed within a range from the mounting surface 41, through the first inclined surface 45, to the first end face 43. The same applies to the exposed portion of the second external electrode 70.

[0076] The structure of the first external electrode 60 is not limited to the examples described in the above embodiments. The structure of the first plating layer 62 can also be appropriately modified. For example, the first plating layer 62 can be a single layer or a structure with three or more layers stacked. Furthermore, the first plating layer 62 can be omitted. In this case, the first external electrode 60 is constituted only by the first external electrode body 61.

[0077] For example, such as Figure 5 As shown, the upper edge of the first external electrode 60 in the height direction Td can also be non-linear. Alternatively, a cutout 65 can be provided on the upper edge of the first external electrode 60 in the height direction Td, recessed downwards along the first inclined surface 45 towards the height direction Td. In this case, the recessed surface of the first external electrode 60 can also contact the component body 40. Therefore, the first external electrode 60 is securely mounted to the component body 40.

Claims

1. An inductor component comprising: The main body of the component has a mounting surface and a top surface facing the mounting surface; Spiral inductor wiring is disposed within the main body of the component and extends along the extension direction of the central axis of the winding. A first external electrode is connected to a first end of the inductor wiring and exposed on the mounting surface; as well as The second external electrode is connected to the second end of the inductor wiring and is exposed on the mounting surface. In a first direction parallel to the mounting surface, the first external electrode is disposed on a first side, and in the same first direction, the second external electrode is disposed on a second side opposite to the first side. The main body of the component has: A first inclined surface is connected to a first end of a first side of the first direction of the mounting surface, and is inclined in such a way that the further away from the first end it is from the top surface side; and The second inclined surface is connected to the second end of the second side of the mounting surface in the first direction, and is inclined in such a way that the farther away from the second end, the closer to the top surface side. The winding center axis of the inductor wiring extends in a direction parallel to the mounting surface and perpendicular to the first direction. The first external electrode extends from the mounting surface throughout the first inclined surface. The second external electrode extends from the mounting surface across the second inclined surface.

2. The inductor component according to claim 1, wherein, The first external electrode extends to the end of the first side of the first inclined surface in the first direction. The second external electrode extends to the end of the second side of the first direction of the second inclined surface.

3. The inductor component according to claim 1 or 2, wherein, A notch is provided on the edge of the top surface of the first external electrode, which is recessed along the first inclined surface toward the mounting surface.

4. The inductor component according to claim 1 or 2, wherein, The main body of the component has a first end face and a second end face that are orthogonal to the mounting surface. The end of the first side of the first inclined surface in the first direction and the end of the first side of the top surface in the first direction are connected by the first end face. The end of the second side of the second inclined surface in the first direction and the end of the second side of the top surface in the first direction are connected by the second end face.

5. The inductor component according to claim 4, wherein, When viewed from the extending direction of the winding center axis, the inductor wiring has: The first straight portion extends parallel to the mounting surface; The second straight section is connected to the end of the first straight section on the first end face side and extends parallel to the first inclined surface. The third straight section is connected to the end of the second straight section on the first end face side and extends parallel to the first end face; The fourth straight section is connected to the end of the third straight section on the top surface side and extends parallel to the top surface; The fifth straight section is connected to the end of the fourth straight section on the second end face side and extends parallel to the second end face; as well as The sixth straight section is connected to the end of the fifth straight section on the mounting surface side and extends parallel to the second inclined surface.

6. The inductor component according to claim 5, wherein, The angle between the extension direction of the first straight section and the extension direction of the second straight section, and the angle between the extension direction of the second straight section and the extension direction of the third straight section, wherein the angle is between 125 degrees and 145 degrees, are both above 125 degrees and below 145 degrees.

7. The inductor component according to claim 1 or 2, wherein, In the portion of the first external electrode that extends parallel to the mounting surface, the distance from the end of the first external electrode on the top surface side to the mounting surface is 10 μm or more.

8. The inductor component according to claim 1 or 2, wherein, The first external electrode has: A first external electrode body is disposed inside the component body and connected to a first end of the inductor wiring; and The first plating layer is stacked on the exposed surface of the outer surface of the first external electrode body on the component body. The second external electrode has: The second external electrode body is disposed inside the component body and is connected to the second end of the inductor wiring; and The second plating layer is stacked on the exposed surface of the outer surface of the component body of the second external electrode body. The dimension of the first external electrode body in the extension direction of the winding center axis is more than 0.6 times and less than 0.9 times the dimension of the component body in the extension direction of the winding center axis. The dimension of the second external electrode body in the extension direction of the winding center axis is more than 0.6 times and less than 0.9 times the dimension of the component body in the extension direction of the winding center axis.

9. An inductor component mounting substrate, wherein, The device comprises an inductor component as described in any one of claims 1 to 8, and a substrate on which the inductor component is mounted. The substrate comprises: The first pad is for connecting the first external electrode; and The second pad is used for connecting the second external electrode. The distance from the first side of the first pad in the first direction to the second side of the second pad in the first direction is less than or equal to the maximum dimension of the inductor component in the first direction.

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