Electronic component

Abstract

The invention relates to an electronic component. An electronic component (10) is provided with a component main body (12), an external electrode (14a), and a protective member. The component main body (12) has a mounting surface (SD), a left surface (SL), a right surface, and a chamfered portion (SCL). The mounting surface faces downward and is connected to the left surface via a chamfered portion. The chamfered portion extends along the front-rear axis when viewed in the upper direction. The external electrode is provided on the mounting surface. A distance from the external electrode to the left surface is shorter than a distance from the external electrode to the right surface. The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode. A cross-section of an exposed portion that is parallel to the vertical axis and the left-right axis and is exposed from the protective member through the external electrode is defined as a first cross-section. In the first cross section, the center of the exposed portion in the direction along the left-right axis is defined as an exposed portion center (C). In the first cross section, the left end of the external electrode is positioned above the right end of the external electrode.

Description

Technical Field

[0001] The present invention relates to electronic components. Background Art

[0002] As an example of an invention related to conventional electronic components, for example, the ceramic electronic component described in Patent Document 1 is known. This ceramic electronic component includes a coating layer that covers at least a portion of the periphery of an external terminal electrode provided on a ceramic layer. This protects the periphery of the external terminal electrode, thereby preventing the external terminal electrode from peeling off from the ceramic layer.

[0003] Patent Document 1: Japanese Patent No. 5708798

[0004] As described above, in the field of ceramic electronic components described in Patent Document 1, it is required to suppress the peeling of external terminal electrodes from the ceramic layer. Summary of the Invention

[0005] Therefore, an object of the present invention is to suppress separation of an external electrode from a component body.

[0006] An electronic component according to one embodiment of the present invention includes a component body, an external electrode, and a protective member.

[0007] The component body has a mounting surface, a left surface, a right surface and a chamfered portion.

[0008] The mounting surface faces downward and is connected to the left surface via the chamfered portion.

[0009] When viewed from above, the chamfered portion extends along the front-rear axis.

[0010] The external electrode is provided on the mounting surface.

[0011] The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface.

[0012] The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode.

[0013] A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section.

[0014] In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion.

[0015] In the first cross-section, the left end of the external electrode is located above the right end of the external electrode, and / or, in the first cross-section, the distance from the left end of the external electrode to the center of the exposed portion is shorter than the distance from the right end of the external electrode to the center of the exposed portion.

[0016] An electronic component according to one embodiment of the present invention includes a component body, an external electrode, and a protective member.

[0017] The component body has a mounting surface, a left surface, a right surface and a chamfered portion.

[0018] The mounting surface faces downward and is connected to the left surface via the chamfered portion.

[0019] When viewed from above, the chamfered portion extends along the front-rear axis.

[0020] The external electrode is provided on the mounting surface.

[0021] The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface.

[0022] The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode.

[0023] A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section.

[0024] In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion.

[0025] In the first cross section, a virtual chamfered portion is defined as a virtual line that is line-symmetrical to the chamfered portion about a virtual line passing through the center of the exposed portion and extending along the vertical axis.

[0026] In the first cross section, a shortest distance from the external electrode to the chamfered portion is longer than a shortest distance from the external electrode to the dummy chamfered portion.

[0027] According to the electronic component of the present invention, it is possible to suppress the external electrodes from being peeled off from the component body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a perspective view of the appearance of the electronic component 10 .

[0029] Figure 2 It is a bottom view of the electronic component 10 .

[0030] Figure 3 yes Figure 2 Cross-sectional view at AA.

[0031] Figure 4 It is a cross-sectional view of the electronic component 10a. DETAILED DESCRIPTION

[0032] (Implementation Method)

[0033] [Structure of Electronic Component 10]

[0034] Hereinafter, the structure of the electronic component 10 according to the embodiment of the present invention will be described with reference to the drawings. Figure 1 It is a perspective view of the appearance of the electronic component 10 . Figure 2 It is a bottom view of the electronic component 10 . Figure 3 yes Figure 2 Cross-sectional view at AA.

[0035] In this specification, directions are defined as follows. The direction in which multiple insulator layers are stacked is defined as the up-down direction. Directions perpendicular to the up-down direction are defined as the left-right direction and the front-back direction. The left-right direction and the front-back direction are perpendicular. Furthermore, the up-down direction, the front-back direction, and the left-right direction in this embodiment do not necessarily need to be the same as the up-down direction, the front-back direction, and the left-right direction when the electronic component 10 is in use.

[0036] First, refer to Figure 1 as well as Figure 2 The structure of the electronic component 10 is described. The electronic component 10 is used in wireless communication terminals such as smart phones. Figure 1 As shown, the electronic component 10 includes a component body 12 , external electrodes 14 a to 14 d , and protective members 16 a to 16 d .

[0037] The component body 12 has a structure in which a plurality of insulating layers are stacked in the vertical direction. The component body 12 has a rectangular parallelepiped shape. Figure 1 As shown, component body 12 has a top surface SU, a mounting surface SD, a left surface SL, a right surface SR, a front surface SF, and a back surface SB. Top surface SU faces upward. Mounting surface SD faces downward. Left surface SL, right surface SR, front surface SF, and back surface SB are side surfaces located between mounting surface SD and top surface SU.

[0038] In addition, each ridgeline of the component body 12 is chamfered. Therefore, the component body 12 has a chamfered portion SCL. The chamfered portion SCL is rounded so as to bulge in a direction away from the center of the component body 12. The mounting surface SD is connected to the left surface SL via the chamfered portion SCL. Figure 2 As shown in FIG. 1 , the chamfered portion SCL extends along the front-rear axis when viewed from above. The material of the component body 12 as described above is ceramic.

[0039] External electrodes 14a to 14d are provided on the mounting surface SD. External electrode 14a is located near the left rear corner of the mounting surface SD. The distance from external electrode 14a to the left surface SL is shorter than the distance from external electrode 14a to the right surface SR. External electrode 14b is located near the right rear corner of the mounting surface SD. The distance from external electrode 14b to the right surface SR is shorter than the distance from external electrode 14b to the left surface SL. External electrode 14c is located near the left front corner of the mounting surface SD. The distance from external electrode 14c to the left surface SL is shorter than the distance from external electrode 14c to the right surface SR. External electrode 14d is located near the right front corner of the mounting surface SD. The distance from external electrode 14d to the right surface SR is shorter than the distance from external electrode 14d to the left surface SL. When viewed from above, external electrodes 14a to 14d have a rectangular shape. Therefore, when viewed from above, external electrodes 14a to 14d each have rectangular outer edges Ea to Ed.

[0040] The protective members 16a to 16d are provided on the mounting surface SD. The protective members 16a to 16d have a ring shape that covers the entire outer edges Ea to Ed of the external electrodes 14a to 14d. Specifically, when viewed from above, the protective members 16a to 16d have a rectangular ring shape. Moreover, when viewed from above, the protective members 16a to 16d overlap with the entire outer edges Ea to Ed, respectively. Moreover, the external electrodes 14a to 14d have exposed portions Pa to Pd exposed from the protective members 16a to 16d, respectively. When viewed from above, the exposed portions Pa to Pd are surrounded by the protective members 16a to 16d, respectively. The material of the protective members 16a to 16d as described above is ceramic. The material of the protective members 16a to 16d is the same as that of the component body 12.

[0041] Here, the external electrode 14a and the protective member 16a are described in detail by way of example. A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion Pa of the external electrode 14a from the protective member 16a is defined as a first cross section. Figure 3 It is a cross-sectional view of the first section.

[0042] First, in the first cross section, the center of the exposed portion Pa along the left-right axis is defined as the exposed portion center C. Furthermore, in the first cross section, a virtual line that is line-symmetric to the chamfered portion SCL about a virtual line BL passing through the exposed portion center C and extending along the up-down axis is defined as a virtual chamfered portion BSCL.

[0043] like Figure 3As shown, in the first cross section, the protective member 16a includes a left portion 16aL that overlaps with the left end TL of the external electrode 14a along the vertical axis, and a right portion 16aR that overlaps with the right end TR of the external electrode 14a along the vertical axis. Furthermore, the thickness tl of the left portion 16aL along the vertical axis is greater than the thickness tr of the right portion 16aR along the vertical axis. Consequently, in the first cross section, the left end TL of the external electrode 14a is located above the right end TR of the external electrode 14a.

[0044] In addition, if Figure 2 As shown, the left and rear sides of the protective member 16a are thicker along the vertical axis than the right and front sides of the protective member 16a. Thus, the two sides of the protective member 16a located near the outer edge of the mounting surface SD have greater thickness along the vertical axis.

[0045] Furthermore, in the first cross-section, the left end TL of the external electrode 14a overlaps the chamfered portion SCL along the vertical axis. However, in the first cross-section, the distance LL from the left end TL of the external electrode 14a to the center C of the exposed portion is shorter than the distance LR from the right end TR of the external electrode 14a to the center C of the exposed portion. Therefore, in the first cross-section, the shortest distance DL from the external electrode 14a to the chamfered portion SCL is longer than the shortest distance DR from the external electrode 14a to the dummy chamfered portion BSCL. In this embodiment, the shortest distance DR is zero. Consequently, the external electrode 14a is not exposed from the chamfered portion SCL.

[0046] Furthermore, in the first cross section, the length Ll of the left overlapping portion P16aL, where the left portion 16aL overlaps the external electrode 14a on the vertical axis, along the left-right axis is shorter than the length Lr of the right overlapping portion P16aR, where the right portion 16aR overlaps the external electrode 14a on the vertical axis, along the left-right axis. Furthermore, the structure of the external electrodes 14b to 14d is identical to that of the external electrode 14a, and therefore their description will be omitted.

[0047] The electronic component 10 described above is mounted on a circuit board by soldering. Solder is applied to the external electrodes 14a to 14d. The external electrodes 14a to 14d are then fixed to the external electrodes of the circuit board by soldering.

[0048] [Effect]

[0049] In the electronic component 10, the protective members 16a to 16d have a ring shape that entirely covers the outer edges Ea to Ed of the external electrodes 14a to 14d. This prevents the external electrodes 14a from peeling off from the component body 12. In particular, if the protective members 16a to 16d are made of the same material as the component body 12, the adhesion of the protective members 16a to 16d to the component body 12 is enhanced. As a result, peeling of the external electrodes 14a from the component body 12 can be more effectively prevented.

[0050] In the electronic component 10, miniaturization of the electronic component 10 is achieved, and exposure of the external electrode 14a from the chamfered portion SCL is suppressed. In the first cross-section, the left end TL of the external electrode 14a overlaps with the chamfered portion SCL on the vertical axis. As a result, the left surface SL is located near the external electrode 14a. Therefore, miniaturization of the electronic component 10 is achieved. However, in this case, the possibility of the left end TL of the external electrode 14a being exposed from the chamfered portion SCL becomes higher. Therefore, in the first cross-section, the distance LL from the left end TL of the external electrode 14a to the center C of the exposed portion is shorter than the distance LR from the right end TR of the external electrode 14a to the center C of the exposed portion. Therefore, in the first cross-section, the shortest distance DL from the external electrode 14a to the chamfered portion SCL is longer than the shortest distance DR from the external electrode 14a to the virtual chamfered portion BSCL. As a result, the right end TR of the external electrode 14a is away from the chamfered portion SCL. Therefore, exposure of the external electrode 14a from the chamfered portion SCL is suppressed.

[0051] In the electronic component 10, the following reasons can also be used to achieve miniaturization of the electronic component 10 and suppress the external electrode 14a from being exposed from the chamfered portion SCL. In the first cross section, the left end TL of the external electrode 14a overlaps with the chamfered portion SCL on the vertical axis. As a result, the left surface SL is located near the external electrode 14a. Therefore, miniaturization of the electronic component 10 is achieved. However, in this case, the possibility of the left end TL of the external electrode 14a being exposed from the chamfered portion SCL becomes higher. Therefore, in the first cross section, the left end TL of the external electrode 14a is located above the right end TR of the external electrode 14a. Therefore, in the first cross section, the shortest distance DL from the external electrode 14a to the chamfered portion SCL is longer than the shortest distance DR from the external electrode 14a to the virtual chamfered portion BSCL. As a result, the right end TR of the external electrode 14a is away from the chamfered portion SCL. Therefore, the external electrode 14a is suppressed from being exposed from the chamfered portion SCL.

[0052] (Variation)

[0053] Hereinafter, an electronic component 10 a according to a modified example will be described with reference to the drawings. Figure 4 It is a cross-sectional view of the electronic component 10a.

[0054] The electronic component 10a differs from the electronic component 10 in that the thickness t1 of the left portion 16aL along the vertical axis is substantially equal to the thickness tr of the right portion 16aR along the vertical axis. Therefore, in the first cross section, the position of the left end TL of the external electrode 14a along the vertical axis is substantially the same as the position of the right end TR of the external electrode 14a along the vertical axis.

[0055] However, in the first cross-section, the distance LL from the left end TL of the external electrode 14a to the center C of the exposed portion is shorter than the distance LR from the right end TR of the external electrode 14a to the center C of the exposed portion. Furthermore, in the first cross-section, the length L1 of the left overlapping portion P16aL, where the left portion 16aL overlaps the external electrode 14a on the vertical axis, along the left-right axis is shorter than the length Lr of the right overlapping portion P16aR, where the right portion 16aR overlaps the external electrode 14a on the vertical axis, along the left-right axis. Consequently, in the first cross-section, the shortest distance DL from the external electrode 14a to the chamfered portion SCL is longer than the shortest distance DR from the external electrode 14a to the dummy chamfered portion BSCL. The remaining structure of the electronic component 10a is the same as that of the electronic component 10, and therefore its description is omitted. The electronic component 10a can achieve the same effects as the electronic component 10.

[0056] (Other embodiments)

[0057] The electronic component according to the present invention is not limited to the electronic components 10 and 10a, and can be modified within the scope of the gist of the present invention. In addition, the structures of the electronic components 10 and 10a can be arbitrarily combined.

[0058] In addition, at least one of the following conditions is satisfied as long as the left end TL of the external electrode 14a in the first cross section is located above the right end TR of the external electrode 14a, or the distance LL from the left end TL of the external electrode 14a to the center C of the exposed portion in the first cross section is shorter than the distance LR from the right end TR of the external electrode 14a to the center C of the exposed portion.

[0059] The material of the protection members 16a to 16d may not be ceramic.

[0060] The material of the component body 12 may not be ceramic.

[0061] The material of the protection members 16 a to 16 d may be different from the material of the component body 12 .

[0062] In the first cross section, the left end TL of the external electrode 14 a may not overlap with the chamfered portion SCL on the up-down axis.

[0063] In addition, in the first cross section, the length Ll of the left repeated portion P16aL of the left portion 16aL overlapping with the external electrode 14a on the vertical axis along the left-right axis may not be shorter than the length Lr of the right repeated portion P16aR of the right portion 16aR overlapping with the external electrode 14a on the vertical axis along the left-right axis.

[0064] The present invention has the following structures.

[0065] (1) An electronic component,

[0066] It has a component body, external electrodes and a protective member,

[0067] The component body has a mounting surface, a left surface, a right surface and a chamfered portion.

[0068] The mounting surface faces downward and is connected to the left surface via the chamfered portion.

[0069] When viewed from above, the chamfered portion extends along the front-rear axis.

[0070] The external electrode is provided on the mounting surface.

[0071] The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface.

[0072] The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode.

[0073] A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section.

[0074] In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion.

[0075] In the first cross-section, the left end of the external electrode is located above the right end of the external electrode, and / or, in the first cross-section, the distance from the left end of the external electrode to the center of the exposed portion is shorter than the distance from the right end of the external electrode to the center of the exposed portion.

[0076] (2) The electronic component according to (1), wherein

[0077] In the first cross section, the protection member includes a left portion overlapping with the left end of the external electrode on the vertical axis, and a right portion overlapping with the right end of the external electrode on the vertical axis.

[0078] The thickness of the left portion along the vertical axis is greater than the thickness of the right portion along the vertical axis.

[0079] (3) The electronic component according to (1) or (2), wherein

[0080] The material of the above-mentioned protection member is ceramic.

[0081] (4) The electronic component according to (3), wherein

[0082] The material of the main body of the above-mentioned component is ceramic.

[0083] (5) The electronic component according to (4), wherein

[0084] The material of the protection member is the same as that of the component body.

[0085] (6) The electronic component according to any one of (1) to (5), wherein

[0086] In the first cross section, the left end of the external electrode overlaps the chamfered portion along the vertical axis.

[0087] (7) The electronic component according to any one of (1) to (6), wherein

[0088] In the first cross section, the protection member includes a left portion overlapping with the left end of the external electrode on the vertical axis, and a right portion overlapping with the right end of the external electrode on the vertical axis.

[0089] In the first cross section, the length of the left overlapping portion of the left portion overlapping with the external electrode on the vertical axis along the left-right axis is shorter than the length of the right overlapping portion of the right portion overlapping with the external electrode on the vertical axis along the left-right axis.

[0090] (8) An electronic component,

[0091] It has a component body, external electrodes and a protective member,

[0092] The component body has a mounting surface, a left surface, a right surface and a chamfered portion.

[0093] The mounting surface faces downward and is connected to the left surface via the chamfered portion.

[0094] When viewed from above, the chamfered portion extends along the front-rear axis.

[0095] The external electrode is provided on the mounting surface.

[0096] The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface.

[0097] The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode.

[0098] A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section.

[0099] In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion.

[0100] In the first cross section, a virtual chamfered portion is defined as a virtual line that is line-symmetrical to the chamfered portion about a virtual line passing through the center of the exposed portion and extending along the vertical axis.

[0101] In the first cross section, a shortest distance from the external electrode to the chamfered portion is longer than a shortest distance from the external electrode to the dummy chamfered portion.

[0102] Description of Reference Numerals

[0103] 10, 10a…electronic component; 12…component body; 14a~14d…external electrodes; 16a~16d…protective member; 16aL…left part; 16aR…right part; BL…virtual line; BSCL…virtual chamfered part; C…center of exposed part; Ea…outer edge; P16aL…left repeated part; P16aR…right repeated part; Pa…exposed part; SB…rear surface; SCL…chamfered part; SD…mounting surface; SF…front surface; SL…left surface; SR…right surface; SU…upper surface; TL…left end; TR…right end.

Claims

1. An electronic component, It has a component body, external electrodes and a protective member, The component body has a mounting surface, a left surface, a right surface and a chamfered portion. The mounting surface faces downward and is connected to the left surface via the chamfered portion. When viewed from above, the chamfered portion extends along the front-rear axis. The external electrode is provided on the mounting surface. The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface. The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode. A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section. In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion. In the first cross-section, the left end of the external electrode is located above the right end of the external electrode, and / or, in the first cross-section, the distance from the left end of the external electrode to the center of the exposed portion is shorter than the distance from the right end of the external electrode to the center of the exposed portion.

2. The electronic component according to claim 1, wherein In the first cross section, the protection member includes a left portion overlapping with the left end of the external electrode on the vertical axis, and a right portion overlapping with the right end of the external electrode on the vertical axis. The thickness of the left portion along the vertical axis is greater than the thickness of the right portion along the vertical axis.

3. The electronic component according to claim 2, wherein In the first cross section, the length of the left overlapping portion of the left portion overlapping with the external electrode on the vertical axis along the left-right axis is shorter than the length of the right overlapping portion of the right portion overlapping with the external electrode on the vertical axis along the left-right axis.

4. The electronic component according to any one of claims 1 to 3, wherein The material of the above-mentioned protection member is ceramic.

5. The electronic component according to claim 4, wherein The material of the main body of the above-mentioned component is ceramic. The electronic component according to claim 5 , wherein The material of the protection member is the same as that of the component body.

7. The electronic component according to any one of claims 1 to 6, wherein In the first cross section, the left end of the external electrode overlaps the chamfered portion along the vertical axis.

8. The electronic component according to any one of claims 1 to 7, wherein In the first cross section, the protection member includes a left portion overlapping with the left end of the external electrode on the vertical axis, and a right portion overlapping with the right end of the external electrode on the vertical axis. In the first cross section, the length of the left overlapping portion of the left portion overlapping with the external electrode on the vertical axis along the left-right axis is shorter than the length of the right overlapping portion of the right portion overlapping with the external electrode on the vertical axis along the left-right axis.

9. An electronic component, It has a component body, external electrodes and a protective member, The component body has a mounting surface, a left surface, a right surface and a chamfered portion. The mounting surface faces downward and is connected to the left surface via the chamfered portion. When viewed from above, the chamfered portion extends along the front-rear axis. The external electrode is provided on the mounting surface. The distance from the external electrode to the left surface is shorter than the distance from the external electrode to the right surface. The protective member is provided on the mounting surface and has a ring shape covering the entire outer edge of the external electrode. A cross section parallel to the vertical axis and the horizontal axis and passing through the exposed portion of the external electrode from the protective member is defined as a first cross section. In the first cross section, the center of the exposed portion along the left-right axis is defined as the center of the exposed portion. In the first cross section, a virtual chamfered portion is defined as a virtual line that is line-symmetrical to the chamfered portion about a virtual line passing through the center of the exposed portion and extending along the vertical axis. In the first cross section, a shortest distance from the external electrode to the chamfered portion is longer than a shortest distance from the external electrode to the dummy chamfered portion.

Images