Electronic components and electronic devices

Abstract

To provide an electronic component and electronic device that enable reliability of them to be improved.SOLUTION: An electronic component according to an embodiment includes an element, a first lead, and a second lead. The element includes a first electrode and a second electrode. The first lead is electrically connected to the first electrode and has a flattened cross section. The second lead is electrically connected to the second electrode. The first lead includes a first connection portion, a first bonding portion, and a first extension portion. The first lead is connected to the first electrode at the first connection portion. The first bonding portion extends in an extension direction perpendicular to a first counter direction connecting the first electrode and the second electrode, and is bound to a substrate. The first extension portion is provided between the first connection portion and the first bonding portion and extends in the extension direction. The longitudinal direction of the first bonding portion is different from the longitudinal direction of the first extension portion. The longitudinal direction of the first extension portion intersects with the second counter direction connecting the first lead and the second lead.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to electronic components and electronic devices.

Background Art

[0002] There is an electronic component including a pair of leads. It is desirable that the reliability of the electronic component is high.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide an electronic component and an electronic device capable of improving reliability.

Means for Solving the Problems

[0005] The electronic component according to the embodiment includes an element, a first lead, and a second lead. The element includes a first electrode and a second electrode. The first lead is electrically connected to the first electrode and has a flat cross-section. The second lead is electrically connected to the second electrode. The first lead includes a first connection portion, a first bonding portion, and a first extending portion. In the first lead, the first connection portion is connected to the first electrode. The first bonding portion extends in an extending direction perpendicular to a first facing direction connecting the first electrode and the second electrode and is bonded to a substrate. The first extending portion is provided between the first connection portion and the first bonding portion and extends in the extending direction. The longitudinal direction in the first bonding portion is different from the longitudinal direction in the first extending portion. The longitudinal direction in the first extending portion intersects a second facing direction connecting the first lead and the second lead.

Brief Description of the Drawings

[0006] [Figure 1] This is a perspective view showing an electronic component according to the first embodiment. [Figure 2] These are cross-sectional views of the first and second leads. [Figure 3] This is a perspective view showing the mounting of electronic components according to the first embodiment. [Figure 4] This is a perspective view showing an electronic component according to the first embodiment. [Figure 5] This is a cross-sectional view of the extended portion of an electronic component according to the first embodiment. [Figure 6] This is a schematic plan view showing an electronic component according to the first embodiment. [Figure 7] This is a calculation result showing the change in the second moment of area with respect to the angle θ. [Figure 8] This is a schematic diagram illustrating a preferred structure. [Figure 9] This is a schematic diagram illustrating a preferred structure. [Figure 10] This is a cross-sectional view showing the cross-sectional shapes of the first and second leads. [Figure 11] This is a perspective view showing an electronic component according to a modified example of the first embodiment. [Figure 12] This is a perspective view showing an electronic device according to the first embodiment. [Figure 13] This is a plan view showing the substrate of an electronic device according to the first embodiment. [Figure 14] This is a perspective view showing an electronic component according to the second embodiment. [Figure 15] This is a schematic diagram showing the structure of an electronic component according to the second embodiment. [Figure 16] This is a perspective view showing an electronic device according to the second embodiment. [Figure 17] This is a plan view showing the circuit board of an electronic device according to the second embodiment. [Figure 18] This is a plan view showing an electronic device according to the second embodiment. [Figure 19] This is a plan view showing an electronic device related to a reference example.

Best Mode for Carrying Out the Invention

[0007] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the ratio of the sizes between parts, etc. are not necessarily the same as the actual ones. Even when representing the same part, the dimensions and ratios may be represented differently in the drawings. In the specification of this application and each figure, the same reference numerals are assigned to the same elements as those already described, and the detailed description will be omitted as appropriate.

[0008] (First Embodiment) FIG. 1(a) and FIG. 1(b) are perspective views showing an electronic component according to the first embodiment. As shown in FIGS. 1(a) and 1(b), the electronic component 100 according to the first embodiment includes a first lead 1, a second lead 2, and an element 10.

[0009] The element 10 includes a first electrode 11 and a second electrode 12. The first lead 1 and the second lead 2 are electrically connected to the first electrode 11 and the second electrode 12, respectively. The first lead 1 and the second lead 2 are separated from each other.

[0010] In the description of the following embodiments, an XYZ coordinate system is used for the sake of explanation. The direction connecting the first electrode 11 and the second electrode 12 is defined as the X direction (first facing direction). The direction connecting the first lead 1 and the second lead 2 is defined as the Y direction (second facing direction). The direction perpendicular to the X direction and the Y direction is defined as the Z direction (extending direction). The X direction and the Y direction are not necessarily orthogonal.

[0011] The element 10 is, for example, a capacitor. A ceramic 13 is provided between a first electrode 11 and a second electrode 12. The first electrode 11 and the second electrode 12 face each other in the X direction via the ceramic 13. In the electronic component 100, the element 10 is a single-layer or multilayer ceramic capacitor. The element 10 extends along a plane intersecting the X direction. That is, the length of the element 10 in the X direction is shorter than the lengths of the element 10 in the Y and Z directions, respectively. The first electrode 11, the second electrode 12, and the ceramic 13 may be coated with an insulating resin.

[0012] As shown in FIG. 1(a), the first lead 1 includes a first connection portion 1a, a first extending portion 1c, and a first joining portion 1e. The first connection portion 1a is electrically connected to the first electrode 11. At least a part of the first connection portion 1a contacts the first electrode 11. The first joining portion 1e is joined to an external substrate, for example, by solder. The first extending portion 1c is provided between the first connection portion 1a and the first joining portion 1e. The first extending portion 1c and the first joining portion 1e extend in the Z direction.

[0013] The first lead 1 has a flat cross section. That is, in a cross section perpendicular to the direction in which the first lead 1 extends, the length of the first lead 1 in one direction is different from the length of the first lead 1 in another direction. More specifically, reference will be made to FIGS. 2(a) to 2(c) for description.

[0014] FIGS. 2(a) to 2(c) are cross-sectional views of the first lead and the second lead. More specifically, FIGS. 2(a) to 2(c) are cross-sectional views when the first lead 1 and the second lead 2 are cut along the X-Y plane passing through the A1-A2 line, the B1-B2 line, and the C1-C2 line shown in FIGS. 1(a) and 1(b), respectively. The A1-A2 line, the B1-B2 line, and the C1-C2 line are perpendicular to the X direction.

[0015] In the electronic component 100, the cross-section of the first lead 1 is rectangular. Therefore, as shown in Figures 2(a) to 2(c), the first lead 1 has a first surface S1 to a fourth surface S4. The second surface S2 is located on the opposite side of the first surface S1. The fourth surface S4 is located on the opposite side of the third surface S3. The distance D1L between the first surface S1 and the second surface S2 is different from the distance D1S between the third surface S3 and the fourth surface S4. Distance D1L is longer than distance D1S. The direction connecting the first surface S1 and the second surface S2 is the short-side direction SD1 of the first lead 1. The direction connecting the third surface S3 and the fourth surface S4 is the long-side direction LD1 of the first lead 1.

[0016] In the electronic component 100, as shown in Figure 1(a), the contact portion of the first connection portion 1a with the first electrode 11 is inclined with respect to the Z direction. Another part of the first connection portion 1a is curved. As a result, the longitudinal direction LD1 and the short direction SD1 of one end of the first connection portion 1a are perpendicular to the Z direction. Figure 2(a) shows a cross-section of that end of the first connection portion 1a. Also, as shown in Figures 2(b) and 2(c), the longitudinal direction LD1 and the short direction SD1 of the first extension portion 1c and the first joint portion 1e are also perpendicular to the Z direction.

[0017] As shown in Figures 2(a) and 2(b), the longitudinal LD1 in the first extension portion 1c is different from the longitudinal LD1 in the first connection portion 1a. This is because, as shown in Figure 1(a), a first intermediate portion 1b is provided between the first connection portion 1a and the first extension portion 1c. The first intermediate portion 1b is twisted so that the longitudinal LD1 of the first lead 1 changes.

[0018] As shown in Figure 1(a), a first interference portion 1d is provided between the first extension portion 1c and the first joint portion 1e. The first interference portion 1d is twisted so that it interferes with the substrate when the electronic component 100 is mounted on the substrate. That is, during mounting, the first interference portion 1d catches on a hole provided in the substrate. Also, due to the twisting of the first interference portion 1d, as shown in Figures 2(b) and 2(c), the longitudinal direction LD1 in the first joint portion 1e is different from the longitudinal direction LD1 in the first extension portion 1c. The longitudinal direction LD1 in the first joint portion 1e may be different from the longitudinal direction LD1 in the first connection portion 1a, or it may be parallel to the longitudinal direction LD1 in the first connection portion 1a.

[0019] The second lead 2 has the same structure as the first lead 1. Specifically, as shown in Figure 1(b), the second lead 2 includes a second connecting portion 2a, a second intermediate portion 2b, a second extending portion 2c, a second interfering portion 2d, and a second joining portion 2e.

[0020] The second connection portion 2a is electrically connected to the second electrode 12. At least a portion of the second connection portion 2a is in contact with the second electrode 12. Also, a portion of the second connection portion 2a is curved. The second junction portion 2e is bonded to the substrate. The second extension portion 2c is provided between the second connection portion 2a and the second junction portion 2e. The second extension portion 2c and the second junction portion 2e extend in the Z direction. The second intermediate portion 2b is provided between the second connection portion 2a and the second extension portion 2c. The second interference portion 2d is provided between the second extension portion 2c and the second junction portion 2e.

[0021] The second lead 2 has a flattened cross-section. As shown in Figures 2(a) to 2(c), the second lead 2 has five faces S5 to eighth faces S8. The sixth face S6 is located on the opposite side of the fifth face S5. The eighth face S8 is located on the opposite side of the seventh face S7. The distance D2L between the seventh face S7 and the eighth face S8 is longer than the distance D2S between the fifth face S5 and the sixth face S6. The direction connecting the fifth face S5 and the sixth face S6 is the short-side direction SD2 of the second lead 2. The direction connecting the seventh face S7 and the eighth face S8 is the long-side direction LD2 of the second lead 2.

[0022] The second intermediate portion 2b is twisted so that the longitudinal LD2 of the second lead 2 changes. Therefore, the longitudinal LD2 in the second extension portion 2c is different from the longitudinal LD2 in the second connection portion 2a. The second interference portion 2d is twisted so that it interferes with the substrate when mounted. Therefore, the longitudinal LD2 in the second joint portion 2e is different from the longitudinal LD2 in the second extension portion 2c. The longitudinal LD2 in the second joint portion 2e may be different from the longitudinal LD2 in the second connection portion 2a, or it may be parallel to the longitudinal LD2 in the second connection portion 2a.

[0023] As shown in Figure 2(b), the first extension portion 1c and the second extension portion 2c face each other in the Y direction. The longitudinal direction LD1 of the first extension portion 1c and the longitudinal direction LD2 of the second extension portion 2c intersect the Y direction. The longitudinal direction LD2 of the second extension portion 2c may be different from the longitudinal direction LD1 of the first extension portion 1c. Preferably, the longitudinal direction LD1 of the first extension portion 1c and the longitudinal direction LD2 of the second extension portion 2c are perpendicular to the Y direction. In this case, the second surface S2 of the first extension portion 1c and the fifth surface S5 of the second extension portion 2c face each other directly.

[0024] The advantages of the first embodiment will be explained. When the electronic component 100 is mounted, solder wets the element 10 from the first joint 1e and the second joint 2e. To prevent a short circuit in the element 10, the first lead 1 and the second lead 2 are provided with a first extension portion 1c and a second extension portion 2c, respectively. The first extension portion 1c and the second extension portion 2c extend in the Z direction. By providing the first extension portion 1c and the second extension portion 2c, the distance between the substrate and the element 10 is increased, making it possible to more reliably prevent a short circuit in the element 10.

[0025] The electronic component 100 may be used in environments where vibration occurs. When the electronic component 100 vibrates, an inertial force is applied to it. In particular, a larger inertial force is applied to element 10, which is larger in size and weight than the first lead 1 and the second lead 2. The inertial force on element 10 is transmitted to the first lead 1 and the second lead 2 and distributed across the substrate. In this case, if the distance between the substrate and element 10 is long, the load applied to the first lead 1 and the second lead 2 will be large. In particular, if element 10 is large and its size and weight are large, the load applied to the first lead 1 and the second lead 2 will be even greater. If a large load is applied to the first lead 1 and the second lead 2, there is a possibility that the first lead 1 and the second lead 2 may be damaged.

[0026] For example, when the electronic component 100 vibrates in a direction intersecting the Y direction (intersecting direction), an inertial force is generated in that intersecting direction. When an inertial force is generated in the intersecting direction, the load on the first lead 1 and the second lead 2 becomes greater than when the inertial force is generated in the Y direction. As a result, the possibility of the first lead 1 and the second lead 2 being damaged becomes higher. In addressing this issue, the longitudinal direction LD1 in the first extension portion 1c is different from the longitudinal direction LD1 in the first connection portion 1a. The longitudinal direction LD1 in the first extension portion 1c intersects with the Y direction connecting the first lead 1 and the second lead 2. By having the longitudinal direction LD1 in the first extension portion 1c intersect with the Y direction, the rigidity of the first lead 1 in the intersecting direction can be increased. This suppresses damage to the first lead 1 when an inertial force is generated in the intersecting direction. In other words, the possibility of the first lead 1 being damaged can be reduced. This improves the reliability of the electronic component 100.

[0027] Furthermore, in order to further suppress damage to the first lead 1, it is preferable that the distance between the substrate and the element 10 be correctly set when mounting the electronic component 100. The distance between the substrate and the element 10 affects the load on the first lead 1. If the distance between the substrate and the element 10 is longer than the design value when the electronic component 100 is mounted, a larger load than expected will be placed on the first lead 1. This increases the likelihood of damage to the first lead 1.

[0028] Figures 3(a) and 3(b) are perspective views showing the electronic components mounted according to the first embodiment. Figures 3(a) and 3(b) show parts of the electronic component 100 viewed from different directions. In the electronic component 100, as shown in Figure 3(a), the longitudinal LD1 at the first joint 1e is different from the longitudinal LD1 at the first extension 1c. Therefore, when the first joint 1e is mounted on the substrate 150, the first interference portion 1d between the first extension 1c and the first joint 1e interferes with the substrate 150. This determines the position of the first lead 1 in the Z direction relative to the substrate 150. As a result, it is possible to suppress variations in the distance between the substrate and the element 10 from the design value.

[0029] Figures 4(a) and 4(b) are perspective views showing electronic components according to the first embodiment. To further increase the rigidity of the first lead 1 in the intersecting direction, it is preferable that the first intermediate portion 1b be closer to the element 10. For example, as shown in Figure 4(a), it is preferable that the length L1 in the Z direction from the contact portion between the first connection portion 1a and the first electrode 11 to the first intermediate portion 1b is less than half the length L2 in the Z direction from the contact portion to the first interference portion 1d. More preferably, the length L1 is less than one-third of the length L2.

[0030] To further increase the rigidity of the first lead 1 in the intersecting direction, it is preferable that the distance D1L is longer than twice the distance D1S. On the other hand, if the distance D1L is too long compared to the distance D1S, it may become difficult to process or mount the first lead 1. For this reason, it is preferable that the distance D1L is shorter than 10 times the distance D1S.

[0031] In the electronic component 100 according to the first embodiment, the longitudinal direction LD2 of the second lead 2 in the second extension portion 2c is different from the longitudinal direction LD2 of the second connection portion 2a, similar to the first lead 1. The longitudinal direction LD2 in the second extension portion 2c intersects with the Y direction. This increases the rigidity of the second lead 2 in the intersecting direction and suppresses damage to the second lead 2.

[0032] Furthermore, as shown in Figure 3(b), the longitudinal LD2 in the second joint 2e differs from the longitudinal LD2 in the second extension 2c, causing the second interference portion 2d between the second extension 2c and the second joint 2e to interfere with the substrate 150. This determines the position of the second lead 2 in the Z direction relative to the substrate 150. By determining the positions of both the first lead 1 and the second lead 2, variations in the distance between the substrate and the element 10 can be further suppressed.

[0033] To further increase the rigidity of the second lead 2 in the intersecting direction, it is preferable that the second intermediate portion 2b be closer to the element 10. For example, as shown in Figure 4(b), it is preferable that the length L3 in the Z direction from the contact portion between the second connection portion 2a and the second electrode 12 to the second intermediate portion 2b is less than half the length L4 in the Z direction from the contact portion to the second interference portion 2d. More preferably, the length L3 is less than one-third of the length L4.

[0034] To further increase the rigidity of the second lead 2 in the intersecting direction, it is preferable that the distance D2L is longer than twice the distance D2S. On the other hand, if the distance D2L is too long compared to the distance D2S, it may become difficult to process or mount the second lead 2. For this reason, it is preferable that the distance D2L is shorter than 10 times the distance D2S.

[0035] The load on the first lead 1 and the second lead 2 is greatest when an inertial force is generated in a direction perpendicular to the Y direction (orthogonal direction). For this reason, it is preferable that the stiffness of the first extension 1c and the stiffness of the second extension 2c are large in the orthogonal direction.

[0036] Figure 5 is a cross-sectional view of the extended portion of the electronic component according to the first embodiment. Figure 6 is a schematic plan view showing the electronic component according to the first embodiment. In Figure 6, for the first lead 1, the first extension portion 1c is shown overlapping one end of the first connection portion 1a and indicated by a dashed line. For the second lead 2, the second extension portion 2c is shown overlapping one end of the second connection portion 2a and indicated by a dashed line.

[0037] In Figures 5 and 6, length h is the longitudinal dimension of the first extension 1c. Length b is the transverse dimension of the first extension 1c. Here, length h is set to three times length b. Length e1 is the distance between line Li1 and line Li2. Length e2 is the distance between line Li1 and line Li3. Line Li1 passes through the longitudinal and transverse center of the first extension 1c and is parallel to the Y direction. Line Li2 passes through one end of the first extension 1c in the orthogonal direction and is parallel to the Y direction. Line Li3 passes through the other end of the first extension 1c in the orthogonal direction and is parallel to the Y direction. Here, length e1 is equal to length e2. Angle θ is the angle between the Y direction and the bending axis. Angle θ corresponds to the angle between the direction of the load applied to the first extension 1c and the longitudinal direction of the first extension 1c.

[0038] When a load is applied to the first extended portion 1c, the second moment of area I of the first extended portion 1c is expressed by the following equation 1.

number

[0039] Figure 7 shows the calculation results illustrating the change in the second moment of area with respect to the angle θ. The relationship between the angle θ and the second moment of area I, according to the mathematical formula, is shown in Figure 7. As shown in Figure 7, the second moment of area I is maximum when the angle θ is 0 degrees. As the angle θ increases, the second moment of area I decreases.

[0040] Generally, the strength of a product is determined by adding a safety margin to the required strength, taking into account manufacturing tolerances, degradation over time, etc. When an electronic component 100 is designed so that the angle θ is 0 degrees, a decrease of about 10% in the second moment of area I is permissible, taking into account the design safety margin. In Figure 7, the dashed line shows a value of 0.9 times the maximum second moment of area I. As shown in Figure 7, the second moment of area I when the angle θ is about 20 degrees is 0.9 times the maximum second moment of area I. For this reason, it is preferable that the angle between the longitudinal direction and the orthogonal direction of the first extension 1c is less than 20 degrees. The above calculation results can also be applied to the second extension 2c. For this reason, it is preferable that the angle between the longitudinal direction and the orthogonal direction of the second extension 2c is less than 20 degrees. More preferably, the angle between the longitudinal direction and the orthogonal direction of the first extension 1c is less than 10 degrees, and the angle between the longitudinal direction and the orthogonal direction of the second extension 2c is less than 10 degrees.

[0041] Most preferably, the longitudinal direction LD1 in the first extension portion 1c and the longitudinal direction LD2 in the second extension portion 2c are perpendicular to the Y direction. That is, it is most preferable that the angle θ is 0 degrees. This further suppresses damage to the first lead 1 and the second lead 2.

[0042] In this specification, perpendicular (orthogonal) and parallel do not refer only to strictly perpendicular and parallel lines, but also include variations in the manufacturing process, for example. The longitudinal direction LD1 in the first extension 1c and the longitudinal direction LD2 in the second extension 2c only need to be substantially parallel to the orthogonal direction. For example, an error of less than 1 degree is acceptable as manufacturing variation.

[0043] Figures 8(a) to 8(d) are schematic diagrams illustrating a preferred structure. Figure 8(a) shows the cross-sectional shapes of the first connecting portion 1a and the first extending portion 1c, similar to those in Figures 2(a) and 2(b). The first connecting portion 1a is represented by a dashed line. To reduce the load on the first intermediate portion 1b and suppress damage to the first intermediate portion 1b, it is preferable that the angle of change in the longitudinal direction of the first intermediate portion 1b is less than 90 degrees. That is, it is preferable that the angle θ1 between the longitudinal direction LD1 (dashed line) of the first connecting portion 1a and the longitudinal direction LD1 (solid line) of the first extending portion 1c is less than 90 degrees. Furthermore, it is preferable that a part of the first connecting portion 1a and a part of the first extending portion 1c overlap when viewed from the Z direction.

[0044] Figure 8(b) shows the cross-sectional shapes of the second connecting portion 2a and the second extending portion 2c, similar to those in Figures 2(a) and 2(b). The second connecting portion 2a is represented by a dashed line. To reduce the load on the second intermediate portion 2b and suppress damage to the second intermediate portion 2b, it is preferable that the angle of change in the longitudinal direction of the second intermediate portion 2b is less than 90 degrees. That is, it is preferable that the angle θ2 between the longitudinal direction LD2 (dashed line) of the second connecting portion 2a and the longitudinal direction LD2 (solid line) of the second extending portion 2c is less than 90 degrees. Furthermore, it is preferable that a part of the second connecting portion 2a and a part of the second extending portion 2c overlap when viewed from the Z direction.

[0045] Figure 8(c) shows the cross-sectional shapes of the first extension portion 1c and the first joint portion 1e, similar to those in Figures 2(b) and 2(c). The first extension portion 1c is represented by a dashed line. To reduce the load at the first interference portion 1d and suppress damage to the first interference portion 1d, it is preferable that the angle of change in the longitudinal direction at the first interference portion 1d is less than 90 degrees. That is, it is preferable that the angle θ3 between the longitudinal direction LD1 (dashed line) of the first extension portion 1c and the longitudinal direction LD1 (solid line) of the first joint portion 1e is less than 90 degrees. Furthermore, it is preferable that a part of the first extension portion 1c and a part of the first joint portion 1e overlap when viewed from the Z direction.

[0046] Figure 8(d) shows the cross-sectional shapes of the second extension portion 2c and the second joint portion 2e, similar to those in Figures 2(b) and 2(c). The second extension portion 2c is represented by a dashed line. To reduce the load on the second interference portion 2d and suppress damage to the second interference portion 2d, it is preferable that the angle of change in the longitudinal direction of the second interference portion 2d is less than 90 degrees. That is, it is preferable that the angle θ4 between the longitudinal direction LD2 (dashed line) of the second extension portion 2c and the longitudinal direction LD2 (solid line) of the second joint portion 2e is less than 90 degrees. Furthermore, it is preferable that a part of the second extension portion 2c and a part of the second joint portion 2e overlap when viewed from the Z direction.

[0047] To suppress damage to the first interference portion 1d, it is preferable that the twist angle at the first interference portion 1d is small within the range in which the first interference portion 1d interferes with the substrate. For example, angle θ3 is smaller than angle θ1. Similarly, to suppress damage to the second interference portion 2d, it is preferable that the twist angle at the second interference portion 2d is small within the range in which the second interference portion 2d interferes with the substrate. For example, angle θ4 is smaller than angle θ2.

[0048] Preferably, the direction of twist at the first interference portion 1d is the same as the direction of twist at the first intermediate portion 1b. When the directions of twist are the same, the first joint portion 1e is located further outward from the electronic component 100. Similarly, preferably, the direction of twist at the second interference portion 2d is the same as the direction of twist at the second intermediate portion 2b. This allows the second joint portion 2e to be located further outward from the electronic component 100. The distance in the Y direction between the first joint portion 1e and the second joint portion 2e is increased, improving the stability of the mounted electronic component 100.

[0049] Furthermore, by creating a portion that interferes with the substrate through twisting, the length of each lead can be shortened compared to the case where a portion of each lead is bent to create a portion that interferes with the substrate. By shortening the length of each lead, the load applied to each lead when the electronic component 100 vibrates can be reduced.

[0050] Figures 9(a) to 9(d) are schematic diagrams illustrating a preferred structure. As shown in Figure 9(a), the center C1a of the first connecting portion 1a in the longitudinal direction LD1 coincides with the center C1c of the first extending portion 1c in the longitudinal direction LD1 in the Z direction. Preferably, the center position of the first connecting portion 1a in the XY plane coincides with the center position of the first extending portion 1c in the XY plane. The center of rotation of the twist in the first intermediate portion 1b coincides with the center of the first connecting portion 1a or the first extending portion 1c in the XY plane.

[0051] As shown in Figure 9(c), the center C1c of the first extension portion 1c in the longitudinal direction LD1 coincides with the center C1e of the first joint portion 1e in the longitudinal direction LD1 in the Z direction. Preferably, the center position of the first extension portion 1c in the XY plane coincides with the center position of the first joint portion 1e in the XY plane. The center of rotation of the twist in the first interference portion 1d coincides with the center of the first extension portion 1c or the first joint portion 1e in the XY plane.

[0052] Similar to the first lead 1, the second lead 2 also has a center C2a in the longitudinal direction LD2 of the second connection portion 2a, which coincides with the center C2c in the longitudinal direction LD2 of the second extension portion 2c in the Z direction, as shown in Figure 9(b). Preferably, the center position of the second connection portion 2a in the XY plane coincides with the center position of the second extension portion 2c in the XY plane. The center of rotation of the twist in the second intermediate portion 2b coincides with the center of the second connection portion 2a or the second extension portion 2c in the XY plane.

[0053] As shown in Figure 9(d), the center C2c of the second extension portion 2c in the longitudinal direction LD2 coincides with the center C2e of the second joint portion 2e in the longitudinal direction LD2 in the Z direction. Preferably, the center position of the second extension portion 2c in the XY plane coincides with the center position of the second joint portion 2e in the XY plane. The center of rotation of the twist in the second interference portion 2d coincides with the center of the second extension portion 2c or the second joint portion 2e in the XY plane.

[0054] By twisting the first intermediate section 1b so that the center C1a overlaps with the center C1c in the Z direction, the dimensions of the first intermediate section 1b in the X direction and the Y direction can be reduced. In other words, the length of the first lead 1 can be shortened. By shortening the length of the first lead 1, the load applied to the first lead 1 when the electronic component 100 vibrates can be reduced.

[0055] Similarly, the length of the first lead 1 can be shortened by twisting the first interference portion 1d so that the center C1c overlaps with the center C1e in the Z direction. The length of the second lead 2 can be shortened by twisting the second intermediate portion 2b so that the center C2a overlaps with the center C2c in the Z direction. The length of the second lead 2 can be shortened by twisting the second interference portion 2d so that the center C2c overlaps with the center C2e in the Z direction.

[0056] In the electronic component 100, as shown in Figure 2(a), the longitudinal direction LD1 of the first connection portion 1a and the longitudinal direction LD2 of the second connection portion 2a are parallel to each other. The longitudinal direction LD1 of the first joint portion 1e and the longitudinal direction LD2 of the second joint portion 2e are parallel to each other. However, the relationship between the longitudinal direction LD1 of the first connection portion 1a and the longitudinal direction LD2 of the second connection portion 2a is arbitrary as long as the first connection portion 1a and the second connection portion 2a can be connected to the first electrode 11 and the second electrode 12, respectively. The relationship between the longitudinal direction LD1 of the first joint portion 1e and the longitudinal direction LD2 of the second joint portion 2e is arbitrary as long as the first joint portion 1e and the second joint portion 2e can be joined to the substrate. Furthermore, the twist angle in the first intermediate portion 1b may be the same as the twist angle in the second intermediate portion 2b, or it may be different from the twist angle in the second intermediate portion 2b. The twist angle at the first interference point 1d may be the same as the twist angle at the second interference point 2d, or it may be different from the twist angle at the second interference point 2d.

[0057] (Example of dimensions) An example of the dimensions of the electronic component 100 is described. The first embodiment is particularly suitable when a large element 10 is used. For example, as shown in Figure 4(a), the length L5 of the element 10 in the direction perpendicular to the X and Z directions is greater than 3 mm and less than 30 mm. The distance D3 between the first lead 1 (first extension 1c) and the second lead 2 (second extension 2c) is greater than 3 mm and less than 40 mm. The lengths L2 and L4 are each greater than 1 mm and less than 15 mm. The lengths L6 and L7 of the first extension 1c and the second extension 2c in the Z direction are each greater than 0.5 mm and less than 10 mm.

[0058] Figures 10(a) to 10(c) are cross-sectional views showing the cross-sectional shapes of the first and second leads. The cross-sectional shape of the first lead 1 and the second lead 2 in the XY plane may be a rounded rectangle, as shown in Figure 10(a). By rounding the corners, damage to the first lead 1, the second lead 2, or the substrate during bonding can be suppressed. Here, the rounded rectangle shown in Figure 10(a) is treated as an effective rectangle.

[0059] The cross-sectional shapes of the first lead 1 and the second lead 2 in the XY plane may be oval, as shown in Figure 10(b). In the cross-sectional shape shown in Figure 10(b), the length of the first extension 1c in the direction perpendicular to the direction connecting the first surface S1 and the second surface S2 is longer than the distance between the first surface S1 and the second surface S2. This perpendicular direction corresponds to the longitudinal direction LD1 of the first extension 1c. The direction connecting the first surface S1 and the second surface S2 corresponds to the short direction SD1 of the first extension 1c. The length of the second extension 2c in the direction perpendicular to the direction connecting the fifth surface S5 and the sixth surface S6 is longer than the distance between the fifth surface S5 and the sixth surface S6. This perpendicular direction corresponds to the longitudinal direction LD2 of the second extension 2c. The direction connecting the fifth surface S5 and the sixth surface S6 corresponds to the short direction SD2 of the second extension 2c.

[0060] The cross-sectional shapes of the first lead 1 and the second lead 2 in the XY plane may be elliptical, as shown in Figure 10(c). In this case, the major axis of the ellipse corresponds to the longitudinal direction, and the minor axis of the ellipse corresponds to the short direction. The specific cross-sectional shapes of the first lead 1 and the second lead 2 are arbitrary, as long as they have either a flattened cross-section.

[0061] Preferably, the cross-sectional shape of the first lead 1 and the second lead 2 in the XY plane is rectangular, as shown in Figures 2(a) to 2(c) or Figure 10(a). Leads with a rectangular cross-sectional shape are easy to manufacture and process, and provide the best possible rigidity in the intersecting direction.

[0062] (modified version) Figure 11 is a perspective view showing an electronic component according to a modified example of the first embodiment. The modified electronic component 110 includes element 10a. The shape of element 10a is different from that of element 10. Element 10a is a multilayer ceramic capacitor. Like element 10, element 10a includes a first electrode 11, a second electrode 12, and a ceramic 13. The first electrode 11, the second electrode 12, and the ceramic 13 may be coated with an insulating resin. For electronic component 110, the X direction connecting the first electrode 11 and the second electrode 12 is parallel to the Y direction connecting the first lead 1v and the second lead 2v.

[0063] The first lead 1v has a flattened cross-section and includes a first connecting portion 1a, a first extending portion 1c, a first interfering portion 1d, and a first joining portion 1e. Unlike the first lead 1, the first lead 1v does not include a first intermediate portion 1b. Therefore, the longitudinal direction of the first connecting portion 1a is parallel to the longitudinal direction of the first extending portion 1c, for example.

[0064] Similarly, the second lead 2v has a flattened cross-section and includes a second connecting portion 2a, a second extending portion 2c, a second interfering portion 2d, and a second joint portion 2e. In Figure 11, the second connecting portion 2a is shown by a dashed line. Unlike the second lead 2, the second lead 2v does not include a second intermediate portion 2b. Therefore, the longitudinal direction of the second connecting portion 2a is parallel to the longitudinal direction of the second extending portion 2c, for example.

[0065] The portion of the first lead 1v between the first connection portion 1a and the first extension portion 1c, and the portion of the second lead 2v between the second connection portion 2a and the second extension portion 2c, may be curved in order to adjust the distance between the first joint portion 1e and the second joint portion 2e.

[0066] The longitudinal direction of the first extension portion 1c of the first lead 1v and the longitudinal direction of the second extension portion 2c of the second lead 2v intersect with the Y direction. This makes it possible to increase the rigidity of the first lead 1v and the second lead 2v in the intersecting direction that intersects with the Y direction.

[0067] Furthermore, the longitudinal direction of the first joint portion 1e is different from the longitudinal direction of the first extension portion 1c. The first lead 1v interferes with the external substrate at the first interference portion 1d. The longitudinal direction of the second joint portion 2e is different from the longitudinal direction of the second extension portion 2c. The second lead 2v interferes with the external substrate at the second interference portion 2d. This determines the positions of the first lead 1v and the second lead 2v in the Z direction relative to the substrate.

[0068] According to the modified version, similar to the first embodiment described above, damage to the electronic component 110 can be suppressed and the reliability of the electronic component 110 can be improved.

[0069] Figure 12 is a perspective view showing an electronic device according to the first embodiment. The electronic device 200 according to the first embodiment comprises an electronic component 100 and a substrate 150, as shown in Figure 12. The substrate 150 has holes 151 and 152. The first joint portion 1e and the second joint portion 2e of the electronic component 100 are inserted into holes 151 and 152, respectively, and joined to wiring on the substrate by solder. Note that solder and wiring are omitted in Figure 12. When mounting the electronic component 100, the position of the electronic component 100 relative to the substrate 150 is determined by the interference of a first interference portion 1d and a second interference portion 2d (not shown) with the substrate 150.

[0070] According to the first embodiment, in the electronic device 200, damage to the first lead 1 and the second lead 2 of the electronic component 100 can be suppressed. The reliability of the electronic device 200 can be improved.

[0071] Figures 13(a) to 13(c) are plan views showing the substrate of the electronic device according to the first embodiment. The shapes of holes 151 and 152 in the substrate 150 are arbitrary, as long as the first joint portion 1e and the second joint portion 2e can be inserted and the first interference portion 1d and the second interference portion 2d can interfere. For example, the shapes of holes 151 and 152 may be rounded rectangles as shown in Figure 13(a), or oval shapes as shown in Figure 13(b). The shapes of holes 151 and 152 may also be shapes in which multiple circles overlap and are connected, as shown in Figure 13(c).

[0072] (Second Embodiment) Figures 14(a) and 14(b) are perspective views showing electronic components according to the second embodiment. The electronic component 100a according to the second embodiment differs from the electronic component 100 according to the first embodiment in the structure of the first interference portion 1d of the first lead 1 and the second interference portion 2d of the second lead 2.

[0073] Figures 15(a) and 15(b) are schematic diagrams showing the structure of an electronic component according to the second embodiment. Figure 15(a) shows the cross-sectional shapes of the first extension portion 1c and the first joint portion 1e. The first extension portion 1c is represented by a dashed line. In the electronic component 100a, the center C1c of the first extension portion 1c in the longitudinal direction LD1 is offset in the Z direction from the center C1e of the first joint portion 1e in the longitudinal direction LD1. The rotational center R1 of the twist in the first interference portion 1d is outside the first interference portion 1d. As a result, the position of the end of the first lead 1 in the longitudinal direction LD1 changes significantly, as indicated by arrow A1.

[0074] Figure 15(b) shows the cross-sectional shapes of the second extension portion 2c and the second joint portion 2e. The second extension portion 2c is represented by a dashed line. Similar to the first lead 1, the center C2c of the second extension portion 2c in the longitudinal direction LD2 is offset in the Z direction from the center C2e of the second joint portion 2e in the longitudinal direction LD2. The rotational center R2 of the twist in the second interference portion 2d is outside the second interference portion 2d. As a result, the position of the end of the second lead 2 in the longitudinal direction LD2 changes significantly, as indicated by arrow A2.

[0075] Figure 16 is a perspective view showing an electronic device according to the second embodiment. Figure 17 is a plan view showing the substrate of the electronic device according to the second embodiment. The electronic device 200a according to the second embodiment includes an electronic component 100a and a substrate 150a, as shown in Figure 16. The first joint 1e and the second joint 2e of the electronic component 100a are inserted into holes 151a and 152a of the substrate 150a, respectively, and are joined to the wiring on the substrate by solder. Note that the solder and wiring are omitted in Figure 16.

[0076] As shown in Figure 17, holes 151a and 152a are circular in the XY plane. For example, the shape of holes 151a and 152a in the XY plane is substantially circular.

[0077] Figures 18(a) and 18(b) are plan views showing an electronic device according to the second embodiment. Figure 18(a) corresponds to an XY cross-sectional view passing through the first joint 1e and the substrate 150a. Figure 18(b) corresponds to an XY cross-sectional view passing through the second joint 2e and the substrate 150a. As shown in Figure 18(a), when viewed from the Z direction, a portion of the first extension 1c overlaps with the substrate 150a outside the hole 151a. That is, the first interference portion 1d interferes with the edge of the hole 151a. Similarly, as shown in Figure 18(b), when viewed from the Z direction, a portion of the second extension 2c overlaps with the substrate 150a outside the hole 152a. The second interference portion 2d interferes with the edge of the hole 152a.

[0078] The advantages of the second embodiment will be explained. The shape of the holes into which the first joint 1e and the second joint 2e are inserted may be circular, as shown in Figure 17, in addition to the flat shape shown in Figures 12(a) to 12(c). Circular holes are easier to form than flat holes. Furthermore, metal foil may be provided around the holes. When metal foil is provided along a flat hole, it is more prone to peeling off than when it is provided along a circular hole. Therefore, from the viewpoint of ease of manufacturing and reliability, circular holes are preferable to flat holes.

[0079] Figures 19(a) and 19(b) are plan views showing an electronic device relating to a reference example. When the hole is circular, the first interference portion 1d and the second interference portion 2d are less likely to interfere with the substrate. Figures 19(a) and 19(b) show how the electronic component 100 is mounted on a substrate 150a having a circular hole. In this case, as shown in Figures 19(a) and 19(b), the first joint portion 1e and the first extension portion 1c pass through hole 151a, and the second joint portion 2e and the second extension portion 2c pass through hole 152a. The first interference portion 1d and the second interference portion 2d do not interfere with the substrate 150a.

[0080] In addressing this issue, in the electronic component 100a according to the second embodiment, the rotational center of the twist in the first interference portion 1d is located outside the first interference portion 1d. As a result, as shown in Figure 18(a), a part of the first extension portion 1c is located outside the hole 151a, allowing the first interference portion 1d to interfere with the substrate 150a. Furthermore, the rotational center of the twist in the second interference portion 2d is located outside the second interference portion 2d. As a result, as shown in Figure 18(b), a part of the second extension portion 2c is located outside the hole 152a, allowing the second interference portion 2d to interfere with the substrate 150a.

[0081] The center of rotation of the torsion in the first interference portion 1d may be located inside the first interference portion 1d, but preferably, the center of rotation is located outside the first interference portion 1d. When the center of rotation of the torsion in the first interference portion 1d is located outside the first interference portion 1d, the angle of torsion required for interference can be reduced compared to when the center of rotation is located inside the first interference portion 1d. By reducing the angle of torsion, a decrease in the strength of the first interference portion 1d can be suppressed. Similarly, when the center of rotation of the torsion in the second interference portion 2d is located outside the second interference portion 2d, the angle of torsion required for interference can be reduced compared to when the center of rotation is located inside the second interference portion 2d, and a decrease in the strength of the second interference portion 2d can be suppressed.

[0082] The embodiments may include the following features: (Note 1) An element including a first electrode and a second electrode, A first lead, electrically connected to the first electrode and having a flattened cross-section, The device comprises a second lead electrically connected to the second electrode, The aforementioned first lead is, A first connection portion connected to the first electrode, A first bonding portion extends in an extending direction perpendicular to the first opposing direction connecting the first electrode and the second electrode, and is bonded to the substrate, A first extending portion is provided between the first connecting portion and the first joining portion, and extends in the extending direction, Includes, The longitudinal direction in the first joint is different from the longitudinal direction in the first extension. An electronic component in which the longitudinal direction of the first extending portion intersects with a second opposing direction connecting the first lead and the second lead. (Note 2) The electronic component as described in Appendix 1, wherein the longitudinal direction in the first extension portion is different from the longitudinal direction in the first connection portion. (Note 3) The first lead further includes a first intermediate portion provided between the first connecting portion and the first extending portion, which is twisted such that the longitudinal direction of the first lead changes. The electronic component as described in Appendix 2, wherein the change in the longitudinal direction in the first intermediate portion is less than 90 degrees. (Note 4) The first lead further includes a first interfering portion provided between the first extending portion and the first joint portion and twisted such that the longitudinal direction of the first lead changes, The electronic component as described in Appendix 3, wherein the angle of change in the longitudinal direction at the first interference portion is smaller than the angle of change in the longitudinal direction at the first intermediate portion. (Note 5) The center of rotation of the torsion in the first interference portion is the electronic component described in Appendix 4, which is located outside the first interference portion. (Note 6) The center of the first joint in the longitudinal direction coincides with the center of the first extension in the longitudinal direction, as described in any one of the appendices 1 to 4. (Note 7) The second lead is, A second connection portion connected to the second electrode, A second bonding portion extending in the aforementioned extending direction and bonded to the substrate, A second extending portion is provided between the second connecting portion and the second joining portion, and extends in the extending direction, Includes, The longitudinal direction in the second joint differs from the longitudinal direction in the second extension. The longitudinal direction in the second extension intersects with the second opposing direction, and is an electronic component as described in any one of the appendices 1 to 6. (Note 8) The electronic component according to any one of the appendices 1 to 7, wherein the angle between the longitudinal direction and the direction perpendicular to the second opposing direction in the first extending portion is less than 20 degrees. (Note 9) The electronic component according to any one of the appendices 1 to 8, wherein the longitudinal direction in the first extending portion is perpendicular to the second opposing direction. (Note 10) An electronic device comprising a circuit board on which any of the electronic components described in Appendix 1 to 9 are mounted.

[0083] Although several embodiments of the present invention have been illustrated above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. Furthermore, the embodiments described above can be implemented in combination with each other. [Explanation of symbols]

[0084] 1,1v: First lead, 1a: First connection, 1b: First intermediate section, 1c: First extension, 1d: First interference section, 1e: First junction, 2,2v: Second lead, 2a: Second connection, 2b: Second intermediate section, 2c: Second extension, 2d: Second interference section, 2e: Second junction, 10,10a: Element, 11: First electrode, 12: Second electrode, 13: Ceramic, 100,100a,110: Electronic component, 150,150a: Substrate, 151,151a,152,152a: Hole, 200: Electronic device, LD1,LD2: Longitudinal direction, SD1,SD2: Shortitudinal direction

Claims

1. An element including a first electrode and a second electrode, A first lead, electrically connected to the first electrode and having a flattened cross-section, The device comprises a second lead electrically connected to the second electrode, The first lead is, A first connection portion connected to the first electrode, A first bonding portion extends in a direction perpendicular to the first opposing direction connecting the first electrode and the second electrode, and is bonded to the substrate, A first extending portion is provided between the first connecting portion and the first joining portion, and extends in the extending direction, A first intermediate portion is provided between the first connecting portion and the first extending portion and is twisted such that the longitudinal direction in a cross-section perpendicular to the extending direction of the first lead changes, Includes, The longitudinal direction of the first joint in a cross-section perpendicular to the extending direction is different from the longitudinal direction of the first joint in a cross-section perpendicular to the extending direction. The longitudinal direction of the first extension portion intersects with the second opposing direction connecting the first lead and the second lead, and is different from the longitudinal direction in a cross-section perpendicular to the extension direction of the first connection portion. An electronic component in which the change in the longitudinal direction of the first lead in the first intermediate portion is less than 90 degrees.

2. The first lead further includes a first interfering portion provided between the first extending portion and the first joint portion and twisted such that the longitudinal direction of the first lead changes, The electronic component according to claim 1, wherein the angle of change in the longitudinal direction of the first lead in the first interference portion is smaller than the angle of change in the longitudinal direction of the first lead in the first intermediate portion.

3. The electronic component according to claim 2, wherein the center of rotation of the twist in the first interference portion is located outside the first interference portion.

4. The electronic component according to claim 1 or 2, wherein the center in the short direction of a cross section perpendicular to the longitudinal direction of the first joint and the extending direction of the first joint coincides with the center in the short direction of a cross section perpendicular to the longitudinal direction of the first extending portion and the extending direction of the first extending portion in the extending direction.

5. The second lead is, A second connection portion connected to the second electrode, A second bonding portion that extends in the aforementioned extending direction and is bonded to the substrate, A second extending portion is provided between the second connecting portion and the second joining portion, and extends in the extending direction, Includes, The longitudinal direction of the second joint in a cross-section perpendicular to the extending direction is different from the longitudinal direction of the second joint in a cross-section perpendicular to the extending direction. The electronic component according to claim 1 or 2, wherein the longitudinal direction of the second extension intersects with the second opposing direction.

6. The electronic component according to claim 1 or 2, wherein the angle between the longitudinal direction of the first extending portion and the direction perpendicular to the second opposing direction and the extending direction is less than 20 degrees.

7. The electronic component according to claim 1 or 2, wherein the longitudinal direction of the first extension is perpendicular to the second opposing direction.

8. An electronic device comprising a substrate on which the electronic component described in claim 1 or 2 is mounted.

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