Laminated coil components

Abstract

To provide a laminated coil component capable of reducing stray capacitance. [Solution] The laminated coil component 1 comprises a base body 2 having a main surface 2d that constitutes the mounting surface, a coil disposed within the base body 2, and external electrodes 4 and 5 spaced apart from each other in a first direction D1 along the main surface 2d. The external electrode 4 has an electrode portion 41 embedded in the base body 2 so as to be exposed from the main surface 2d. The coil is connected to the end 4b of the external electrode 4 in a second direction D2 that intersects the first direction D1 and is along the main surface 2d. The length L1 of the electrode portion 41 in the first direction D1 decreases monotonically as it moves away from the end 4b in the second direction D2.

Description

Technical Field

[0001] The present disclosure relates to a multilayer coil component.

Background Art

[0002] A multilayer coil component including a body, a coil disposed within the body, and a pair of external electrodes connected to the coil is known (see, for example, Patent Document 1). In the coil component described in Patent Document 1, L-shaped external terminal electrodes are provided on the main surface and the end surface of the body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above multilayer coil component, the external electrode and the coil are arranged to face each other. As a result, a parasitic capacitance occurs between the external electrode and the coil.

[0005] An object of the present disclosure is to provide a multilayer coil component capable of reducing parasitic capacitance.

Means for Solving the Problems

[0006] (1) The multilayer coil component according to one aspect of the present disclosure includes a body having a main surface constituting a mounting surface, a coil disposed within the body, and a first external electrode and a second external electrode spaced apart from each other in a first direction along the main surface. The first external electrode has a first main surface electrode portion embedded in the body so as to be exposed from the main surface. The coil intersects the first direction and is connected to a first end portion of the first external electrode in a second direction along the main surface. The length of the first main surface electrode portion in the first direction monotonically decreases as it moves away from the first end portion in the second direction.

[0007] In the above-described laminated coil component, the size of the first main surface electrode portion is smaller compared to a configuration in which the length of the first main surface electrode portion in the first direction does not change in the second direction and the length at the first end is maintained. This reduces the surface area between the first main surface electrode portion and the coil. As a result, stray capacitance can be reduced.

[0008] (2) In the laminated coil component described in (1) above, the base body may have a first end face adjacent to the main surface, and the first external electrode may have a first end face electrode portion embedded in the base body so as to be exposed from the first end face. In this case, the mounting strength is improved.

[0009] (3) In the laminated coil component described in (2) above, the length of the first end face electrode portion in a third direction perpendicular to the main surface may monotonically decrease as it moves away from the first end in the second direction. In this case, the size of the first end face electrode portion becomes smaller compared to a configuration in which the length of the first end face electrode portion in the third direction does not change in the second direction and the length at the first end is maintained. This reduces the area of ​​contact between the first end face electrode portion and the coil. As a result, stray capacitance can be further reduced.

[0010] (4) In any one of the laminated coil components described in (1) to (3) above, the base body has a second end face adjacent to the main face and facing the first end face in the first direction, and the second external electrode has a second main face electrode portion embedded in the base body so as to be exposed from the main face, and a second end face electrode portion embedded in the base body so as to be exposed from the second end face, and the coil is connected to the second end of the second external electrode in the second direction, and the length of the second main face electrode portion in the first direction and the length of the second end face electrode portion in the third direction may decrease monotonically as they move away from the second end in the second direction. In this case, the size of the second main face electrode portion becomes smaller compared to a configuration in which the length of the second main face electrode portion in the first direction does not change in the second direction and the length at the second end is maintained. This reduces the area of ​​contact between the second main face electrode portion and the coil. Also, the size of the second end face electrode portion becomes smaller compared to a configuration in which the length of the second end face electrode portion in the third direction does not change in the second direction and the length at the second end is maintained. This reduces the area of ​​contact between the second end face electrode portion and the coil. As a result, the floating volume can be further reduced.

[0011] (5) In any one of the laminated coil components described in (1) to (4) above, the coil may have a coil axis aligned with the second direction. In this case, the potential difference between the first main surface electrode portion and the coil increases as it moves away from the first end in the second direction. Therefore, as the length of the first main surface electrode portion in the first direction decreases monotonically as it moves away from the first end in the second direction, the area of ​​contact between the first main surface electrode portion and the coil decreases at points where the potential difference between the first main surface electrode portion and the coil is large. This effectively reduces stray capacitance.

[0012] (6) In any one of the laminated coil components described in (1) to (5) above, the edge of the first main surface electrode portion in the first direction may be stepped. In this case, the first main surface electrode portion can be easily formed by laminating electrode layers of different sizes. [Effects of the Invention]

[0013] According to this disclosure, it is possible to provide a laminated coil component that can reduce stray capacitance. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a perspective view of a laminated coil component according to one embodiment. [Figure 2] Figure 2 is an exploded perspective view of the laminated coil component shown in Figure 1. [Figure 3] Figure 3 is a side view of the laminated coil component shown in Figure 1. [Figure 4] Figure 4 shows the multilayer coil component from Figure 1 as viewed from the mounting side. [Figure 5] Figure 5 is a view of the laminated coil component shown in Figure 1, seen from the end face. [Figure 6] Figure 6 is a view of the laminated coil component shown in Figure 1, seen from the end face. [Figure 7] Figure 7 is a view of a modified laminated coil component from the end face. [Modes for carrying out the invention]

[0015] The embodiments will be described in detail below with reference to the attached drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numeral, and redundant descriptions will be omitted.

[0016] Figure 1 is a perspective view of a laminated coil component 1 according to one embodiment. As shown in the figure, the laminated coil component 1 comprises a base body 2, a coil 3 (see Figure 3), an external electrode 4, and an external electrode 5.

[0017] The base body 2 has a rectangular parallelepiped shape. The rectangular parallelepiped shape includes the shape of a rectangular parallelepiped with chamfered corners and ridge lines, and the shape of a rectangular parallelepiped with rounded corners and ridge lines. As its outer surface, the base body 2 includes end faces 2a and 2b facing each other, main faces 2c and 2d facing each other, and side faces 2e and 2f facing each other. In the present embodiment, when mounting the laminated coil component 1 on another electronic device (for example, a circuit board or an electronic component), the main face 2d constitutes a mounting surface facing the other electronic device. The end faces 2a, 2b and the side faces 2e, 2f are faces adjacent to the mounting surface (main face 2d), respectively.

[0018] Hereinafter, the direction in which the end faces 2a and 2b face each other is defined as the first direction D1, the direction in which the side faces 2e and 2f face each other is defined as the second direction D2, and the direction in which the main faces 2c and 2d face each other is defined as the third direction D3. The first direction D1, the second direction D2, and the third direction D3 intersect (here, are orthogonal) to each other. In the present embodiment, the first direction D1 is the length direction of the base body 2. The second direction D2 is the width direction of the base body 2. The third direction D3 is the height direction of the base body 2. The first direction D1 and the second direction D2 are directions along the mounting surface (main face 2d). The first direction D1 is the long side direction of the mounting surface (main face 2d). The second direction D2 is the short side direction of the mounting surface (main face 2d).

[0019] In the present embodiment, the length of the base body 2 in the first direction D1 (the length of the base body 2) is longer than the length of the base body 2 in the second direction D2 (the width of the base body 2) and the length of the base body 2 in the third direction D3 (the height of the base body 2). That is, the main faces 2c, 2d and the side faces 2e, 2f have a rectangular shape with the first direction D1 as the long side direction. The length of the base body 2 in the second direction D2 is longer than the length of the base body 2 in the third direction D3, but may be equal to the length of the base body 2 in the third direction D3. That is, the end faces 2a, 2b have a rectangular shape with the second direction D2 as the long side direction, but may have a square shape. In this specification, equivalent includes not only being equal but also including minute differences or manufacturing errors within a preset range. For example, if a plurality of values are included within the range of ±5% of the average value of the plurality of values, these values may be regarded as equivalent.

[0020] Each end face 2a, 2b extends in the third direction D3 so as to connect between the main faces 2c, 2d. Each end face 2a, 2b also extends in the second direction D2 so as to connect between the side faces 2e, 2f. Each main face 2c, 2d extends in the first direction D1 so as to connect between the end faces 2a, 2b. Each main face 2c, 2d also extends in the second direction D2 so as to connect between the side faces 2e, 2f. Each side face 2e, 2f extends in the first direction D1 so as to connect between the end faces 2a, 2b. Each side face 2e, 2f also extends in the third direction D3 so as to connect between the main faces 2c, 2d.

[0021] FIG. 2 is an exploded perspective view of the stacked coil component 1 of FIG. 1. As shown in the figure, the element body 2 is formed by stacking a plurality of dielectric layers 6 (insulator layers) in the direction in which the side faces 2e, 2f face each other (second direction D2). In the element body 2, the stacking direction of the plurality of dielectric layers 6 (hereinafter, also simply referred to as the “stacking direction”) coincides with the second direction D2. The dielectric layer 6 disposed at one end in the stacking direction has a surface that constitutes the side face 2e. The dielectric layer 6 disposed at the other end in the stacking direction has a surface that constitutes the side face 2f.

[0022] Each dielectric layer 6 is composed of a sintered body of a ceramic green sheet containing, for example, a dielectric material (a dielectric ceramic such as a BaTiO3-based, Ba(Ti,Zr)O3-based, or (Ba,Ca)TiO3-based material). In the actual element body 2, each dielectric layer 6 is integrated to such an extent that the boundary between the dielectric layers 6 is not visible.

[0023] FIG. 3 is a view of the stacked coil component 1 of FIG. 1 as seen from the side face 2f. In the figure, the element body 2 is shown by a dashed line to show the internal structure of the element body 2. As shown in the figure, the coil 3 is disposed inside the element body 2 and is not exposed from the element body 2. The coil 3 has a coil axis AX along the second direction D2. The coil axis AX extends along the second direction D2. The coil axis AX is provided parallel to the main face 2d which is the mounting surface. The extending direction of the coil axis AX coincides with the stacking direction. The coil 3 presents an annular or frame shape (a pentagonal annular or frame shape in this embodiment) when viewed from the second direction D2.

[0024] As shown in Figures 2 and 3, coil 3 includes coil conductors 31, 32, 33, 34, 35, and 36 (hereinafter referred to as coil conductors 31 to 36). Coil 3 is constructed by electrically connecting coil conductors 31 to 36. Coil conductors 31 to 36 are directly connected to each other without through-hole conductors. Coil conductors 31 to 36 are arranged in order along the second direction D2. Coil conductor 31 is located closest to the side surface 2f. Coil conductor 36 is located closest to the side surface 2e.

[0025] The coil conductor 31 has one end of the coil 3 and is connected to the external electrode 5 by a connecting portion 31a. The connecting portion 31a is formed integrally with the coil conductor 31. The coil conductor 36 has the other end of the coil 3 and is connected to the external electrode 4 by a connecting portion 36a. The connecting portion 36a is formed integrally with the coil conductor 36.

[0026] The coil conductors 31-36 contain a conductive material (for example, Ag or Pd). The coil conductors 31-36 are constructed as sintered bodies of a conductive paste containing the conductive material. The coil conductors 31-36 are provided in different dielectric layers 6. Each coil conductor 31-36 penetrates the corresponding dielectric layer 6. The thickness in the second direction D2 of each coil conductor 31-36 is equivalent to the thickness in the second direction D2 of the corresponding dielectric layer 6. The coil conductors 31-36 are not located in the dielectric layers 6 at both ends in the stacking direction. As a result, the coil 3 is not exposed on the sides 2e and 2f.

[0027] External electrodes 4 and 5 are connected to coil 3. External electrodes 4 and 5 are separated from each other in the first direction D1. External electrodes 4 and 5 are facing each other in the first direction D1. External electrode 4 is located on the end face 2a side of the base body 2. External electrode 5 is located on the end face 2b side of the base body 2. When viewed from the first direction D1, external electrodes 4 and 5 have overlapping portions. When viewed from the second direction D2, external electrodes 4 and 5 exhibit an L-shape.

[0028] The external electrode 4 has an electrode portion 41 (first main surface electrode portion) and an electrode portion 42 (first end surface electrode portion). Electrode portion 41 is embedded in the base body 2 so as to be exposed from the main surface 2d. Electrode portion 42 is embedded in the base body 2 so as to be exposed from the end surface 2a. Electrode portions 41 and 42 are connected to each other at the ridge between the end surface 2a and the main surface 2d of the base body 2. Electrode portions 41 and 42 are electrically connected to each other. The external electrode 4 is separated from the end surface 2b, the main surface 2c, and the side surfaces 2e and 2f.

[0029] The electrode portion 41 extends in a first direction D1 and a second direction D2. The electrode portion 41 has an exposed surface 41a that is exposed from the main surface 2d. The exposed surface 41a is coplanar with the main surface 2d. The electrode portion 42 extends in a third direction D3 and a second direction D2. The electrode portion 42 has an exposed surface 42a that is exposed from the end surface 2a. The exposed surface 42a is coplanar with the end surface 2a. The exposed surfaces 41a and 42a are connected to each other at the ridge between the end surface 2a and the main surface 2d of the base body 2.

[0030] The external electrode 5 has an electrode portion 51 (second main surface electrode portion) and an electrode portion 52 (second end surface electrode portion). Electrode portion 51 is embedded in the base body 2 so as to be exposed from the main surface 2d. Electrode portion 52 is embedded in the base body 2 so as to be exposed from the end surface 2b. Electrode portions 51 and 52 are connected to each other at the ridge between the end surface 2b and the main surface 2d of the base body 2. Electrode portions 51 and 52 are electrically connected to each other. The external electrode 5 is separated from the end surface 2a, the main surface 2c, and the side surfaces 2e and 2f.

[0031] The electrode portion 51 extends in the first direction D1 and the second direction D2. The electrode portion 51 has an exposed surface 51a that is exposed from the main surface 2d. The exposed surface 51a is coplanar with the main surface 2d. The electrode portion 52 extends in the third direction D3 and the second direction D2. The electrode portion 52 has an exposed surface 52a that is exposed from the end surface 2b. The exposed surface 52a is coplanar with the end surface 2b. The exposed surfaces 51a and 52a are connected to each other at the ridge between the end surface 2b and the main surface 2d of the base body 2.

[0032] As shown in Figure 2, the external electrode 4 includes electrode layers 11, 12, 13, 14, 15, and 16 (hereinafter referred to as electrode layers 11 to 16) stacked in the second direction D2. In the actual external electrode 4, electrode layers 11 to 16 are integrated to such an extent that the boundaries between the electrode layers are not visible. Electrode layers 11 to 16 are arranged in order along the second direction D2. Electrode layer 11 is located closest to the side surface 2f and constitutes the end 4a of the external electrode 4 in the second direction D2. Electrode layer 16 is located closest to the side surface 2e and constitutes the end 4b (first end) of the external electrode 4 in the second direction D2. The coil 3 is connected to the end 4b by a connection part 36a. The end 4b is the connection part with the coil 3.

[0033] The external electrode 5 includes electrode layers 21, 22, 23, 24, 25, and 26 (hereinafter referred to as electrode layers 21 to 26) stacked in the second direction D2. In the actual external electrode 5, electrode layers 21 to 26 are integrated to such an extent that the boundaries between the electrode layers are not visible. Electrode layers 21 to 26 are arranged in order along the second direction D2. Electrode layer 21 is located closest to the side surface 2f and constitutes end 5a (second end). Electrode layer 26 is located closest to the side surface 2e and constitutes end 5b. The coil 3 is connected to end 5a by a connection part 31a. End 5a is the connection part with the coil 3.

[0034] Electrode layers 11-16 and electrode layers 21-26 contain a conductive material (for example, Ag or Pd). Electrode layers 11-16 and electrode layers 21-26 are constructed as sintered bodies of a conductive paste containing the conductive material. Electrode layers 11-16 and electrode layers 21-26 penetrate the corresponding dielectric layer 6. The thickness of electrode layers 11-16 and electrode layers 21-26 in the third direction D3 is equivalent to the thickness of the corresponding dielectric layer 6 in the third direction D3. In this embodiment, the external electrodes 4 and 5 are formed from the same conductive material as the coil 3. Electrode layers 11-16, electrode layers 21-26, and coil conductors 31-36 are formed by co-firing.

[0035] Electrode layers 11 and 21 are provided in the same dielectric layer 6 as the coil conductor 31. Electrode layers 12 and 22 are provided in the same dielectric layer 6 as the coil conductor 32. Electrode layers 13 and 23 are provided in the same dielectric layer 6 as the coil conductor 33. Electrode layers 14 and 24 are provided in the same dielectric layer 6 as the coil conductor 34. Electrode layers 15 and 25 are provided in the same dielectric layer 6 as the coil conductor 35. Electrode layers 16 and 26 are provided in the same dielectric layer 6 as the coil conductor 36.

[0036] Figure 4 is a view of the laminated coil component 1 of Figure 1 from the mounting surface (main surface 2d). As shown in the figure, the length L1 of the electrode portion 41 (exposed surface 41a) in the first direction D1 decreases monotonically as it moves away from the end 4b in the second direction D2. Here, monotonic decrease means that there is no increasing trend, and it means monotonic decrease in a broad sense. In other words, the maximum value L1max of length L1 is the length of the end 4b (electrode layer 16) in the first direction D1, and the minimum value L1min of length L1 is the length of the end 4a (electrode layer 11) in the first direction D1. It can also be said that the edge 41b of the exposed surface 41a in the second direction D2 does not have an inflection point.

[0037] In this embodiment, the length of the electrode layers 11 to 16 in the first direction D1 decreases in steps by a predetermined length as you move from electrode layer 16 toward electrode layer 11. As a result, the edge 41b exhibits a stepped shape. Here, the height difference between multiple steps is equal to that of the multiple steps, and the spacing between multiple steps is equal to that of the multiple steps.

[0038] The length L2 of the electrode portion 51 (exposed surface 51a) in the first direction D1 decreases monotonically as it moves away from the end 5a in the second direction D2. In other words, the maximum value L2max of length L2 is the length of the end 5a (electrode layer 21) in the first direction D1, and the minimum value L2min is the length of the end 5b (electrode layer 26) in the first direction D1. It can also be said that the edge 51b of the exposed surface 51a in the second direction D2 does not have an inflection point.

[0039] In this embodiment, the length of the electrode layers 21 to 26 in the first direction D1 decreases in steps by a predetermined length from electrode layer 21 to electrode layer 26. As a result, the edge 51b exhibits a stepped shape. Here, the height difference between multiple steps is equal to that of the multiple steps, and the spacing between multiple steps is equal to that of the multiple steps.

[0040] Figure 5 is a view of the laminated coil component 1 of Figure 1 from the end face 2a. As shown in the figure, the length L3 of the electrode portion 42 (exposed surface 42a) in the third direction D3 decreases monotonically as it moves away from the end 4b in the second direction D2. In other words, the maximum value L3max ​​is the length of the end 4b (electrode layer 16) in the third direction D3, and the minimum value L3min is the length of the end 4a (electrode layer 11) in the third direction D3. It can also be said that the end edge 42b of the exposed surface 42a in the second direction D2 does not have an inflection point.

[0041] In this embodiment, the length of the electrode layers 11-16 in the third direction D3 decreases in steps by a predetermined length as you move from electrode layer 16 toward electrode layer 11. As a result, the edge 42b exhibits a stepped shape. Here, the height difference between multiple steps is equal to that of the multiple steps, and the spacing between multiple steps is equal to that of the multiple steps.

[0042] Figure 6 is a view of the laminated coil component 1 of Figure 1 from the end face 2b. As shown in the figure, the length L4 of the electrode portion 52 (exposed surface 52a) in the third direction D3 decreases monotonically as it moves away from the end 5a in the second direction D2. In other words, the maximum value L4max is the length of the end 5a (electrode layer 21) in the third direction D3, and the minimum value L4min is the length of the end 5b (electrode layer 26) in the third direction D3. It can also be said that the edge 52b of the electrode portion 52 (exposed surface 52a) in the second direction D2 does not have an inflection point.

[0043] In this embodiment, the length of the electrode layers 21 to 26 in the third direction D3 decreases in steps by a predetermined length from electrode layer 21 to electrode layer 26. As a result, the edge 52b exhibits a stepped shape. Here, the height difference between multiple steps is equal to that of the multiple steps, and the spacing between multiple steps is equal to that of the multiple steps.

[0044] As explained above, in the laminated coil component 1, the length L1 of the electrode portion 41 in the first direction D1 decreases monotonically as it moves away from the end 4b in the second direction D2. Compared to a configuration in which the length L1 does not change in the second direction D2 and the length L1 is maintained at its maximum value L1max even outside the end 4b, the size of the electrode portion 41 becomes smaller. This reduces the surface area between the electrode portion 41 and the coil 3. As a result, the stray capacitance generated between the electrode portion 41 and the coil 3 can be reduced.

[0045] The length L2 of the electrode portion 51 in the first direction D1 decreases monotonically as it moves away from the end 5a in the second direction D2. Compared to a configuration in which the length L2 does not change in the second direction D2 and is maintained at its maximum value L2max even outside the end 5a, the size of the electrode portion 51 becomes smaller. This reduces the surface area between the electrode portion 51 and the coil 3. As a result, the stray capacitance generated between the electrode portion 51 and the coil 3 can be reduced.

[0046] The length L3 of the electrode portion 42 in the third direction D3 decreases monotonically as it moves away from the end 4b in the second direction D2. Compared to a configuration in which the length L3 does not change in the second direction D2 and is maintained at its maximum value L3max ​​even outside the end 4b, the size of the electrode portion 42 becomes smaller. This reduces the surface area between the electrode portion 42 and the coil 3. As a result, the stray capacitance generated between the electrode portion 42 and the coil 3 can be reduced.

[0047] The length L4 of the electrode portion 52 in the third direction D3 decreases monotonically as it moves away from the end 5a in the second direction D2. Compared to a configuration in which the length L4 does not change in the second direction D2 and is maintained at its maximum value L4max even outside the end 5a, the size of the electrode portion 52 becomes smaller. This reduces the surface area between the electrode portion 52 and the coil 3. As a result, the stray capacitance generated between the electrode portion 52 and the coil 3 can be reduced.

[0048] Coil 3 has a coil axis AX that aligns with the second direction. Therefore, the potential difference between each electrode portion 41, 42 and coil 3 increases as it moves away from the end 4b in the second direction D2. Consequently, the area of ​​contact between each electrode portion 41, 42 and coil 3 decreases where the potential difference between them is large. This effectively reduces the stray capacitance generated between each electrode portion 41, 42 and coil 3. Furthermore, the size of each electrode portion 41, 42 is maintained where the potential difference between them is small, thus maintaining mounting strength.

[0049] Similarly, the potential difference between each electrode portion 51, 52 and the coil 3 increases as it moves away from the end 5a in the second direction D2. Therefore, at locations where the potential difference between each electrode portion 51, 52 and the coil 3 is large, the surface area between each electrode portion 51, 52 and the coil 3 decreases. This effectively reduces the stray capacitance generated between each electrode portion 51, 52 and the coil 3. Furthermore, at locations where the potential difference between each electrode portion 51, 52 and the coil 3 is small, the size of each electrode portion 51, 52 is maintained, thus maintaining mounting strength.

[0050] The edges 41b and 42b of the external electrode 4 are stepped. Therefore, the external electrode 4 can be easily formed by stacking electrode layers 11 to 16 of different sizes. The edges 51b and 52b of the external electrode 5 are stepped. Therefore, the external electrode 5 can be easily formed by stacking electrode layers 21 to 26 of different sizes.

[0051] Although embodiments have been described above, the present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0052] Figure 7 is a view of the modified laminated coil component from the end face 2a. As shown in the figure, in the modified laminated coil component 1A, the edge 42b of the electrode portion 42 (exposed surface 42a) is a single straight line inclined with respect to the second direction D2. Although not shown, the edges 41b, 51b, and 52b may also be a single straight line inclined with respect to the second direction D2.

[0053] Although not shown in the illustration, the edges 41b, 42b, 51b, and 52b may have a stepped shape such that at least one of the step heights differs from the others. The edges 41b, 42b, 51b, and 52b may have a stepped shape such that at least one of the intervals between the steps differs from the others.

[0054] In the laminated coil component 1,1A, the external electrode 4 may not have an electrode portion 42, but only an electrode portion 41. In this case, the electrode portion 41 may be provided on the main surface 2d so as to be spaced away from the end face 2a. The external electrode 5 may not have an electrode portion 52, but only an electrode portion 51. In this case, the electrode portion 51 may be provided on the main surface 2d so as to be spaced away from the end face 2b.

[0055] In the laminated coil components 1,1A, it is sufficient that the length L1 decreases monotonically as it moves away from the end 4b in the second direction D2; for example, the lengths L2, L3, and L4 do not need to change in the second direction D2.

[0056] In the laminated coil component 1,1A, the coil axis AX of the coil 3 may be provided along the first direction D1 or the third direction D3.

[0057] The embodiments and variations described above may be combined as appropriate. [Explanation of Symbols]

[0058] 1,1A…Laminated colloid component, 2…Base body, 2a,2b…End face, 2c,2d…Main face, 2e,2f…Side face, 3…Colloid, 4…External electrode, 4a,4b…End, 41…Electrode portion, 41a…Exposed surface, 41b…End ring, 42…Electrode portion, 42a…Exposed surface, 42b…End ring, 5…External electrode, 5a,5b…End, 51…Electrode portion, 51a…Exposed surface, 51b…End ring, 52…Electrode portion, 52a…Exposed surface, 52b…End ring, AX…Colloid shaft.

Claims

1. A base body having a main surface that constitutes the implementation surface, A coil placed inside the aforementioned body, A first external electrode and a second external electrode are spaced apart from each other in a first direction along the main surface, Equipped with, The first external electrode has a first main surface electrode portion embedded in the body so as to be exposed from the main surface, The coil is connected to the first end of the first external electrode in a second direction that intersects the first direction and lies along the main surface. The length of the first main surface electrode portion in the first direction decreases monotonically as it moves away from the first end in the second direction. Multilayer coil components.

2. The aforementioned body has a first end face adjacent to the main surface, The first external electrode has a first end face electrode portion embedded in the body so as to be exposed from the first end face. The laminated coil component according to claim 1.

3. The length of the first end face electrode portion in a third direction perpendicular to the main surface decreases monotonically as it moves away from the first end in the second direction. The laminated coil component according to claim 2.

4. The aforementioned body has a second end face adjacent to the main surface and facing the first end face in the first direction, The second external electrode has a second main surface electrode portion embedded in the base body so as to be exposed from the main surface, and a second end surface electrode portion embedded in the base body so as to be exposed from the second end surface. The coil is connected to the second end of the second external electrode in the second direction, The length of the second main surface electrode portion in the first direction and the length of the second end surface electrode portion in the third direction decrease monotonically as they move away from the second end in the second direction. The laminated coil component according to claim 3.

5. The coil has a coil axis along the second direction. A laminated coil component according to any one of claims 1 to 4.

6. The edge of the first main surface electrode portion in the first direction is stepped. A laminated coil component according to any one of claims 1 to 4.

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