Source: https://patents.google.com/patent/JP2018041909A/en
Timestamp: 2020-08-09 22:59:15
Document Index: 275524393

Matched Legal Cases: ['art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 13', 'art 13', 'art 13', 'art 13', 'art 13', 'art 13', 'art 15', 'art 31', 'art 31', 'art 31', 'art 31', 'art 31']

JP2018041909A - Electronic component - Google Patents
JP2018041909A
JP2018041909A JP2016176695A JP2016176695A JP2018041909A JP 2018041909 A JP2018041909 A JP 2018041909A JP 2016176695 A JP2016176695 A JP 2016176695A JP 2016176695 A JP2016176695 A JP 2016176695A JP 2018041909 A JP2018041909 A JP 2018041909A
JP2016176695A
Shinya Onodera
考喜 伊藤
2016-09-09 Application filed by Tdk株式会社, Tdk Corp, Ｔｄｋ株式会社 filed Critical Tdk株式会社
2016-09-09 Priority to JP2016176695A priority Critical patent/JP2018041909A/en
2018-03-15 Publication of JP2018041909A publication Critical patent/JP2018041909A/en
239000010408 films Substances 0.000 claims abstract description 393
230000001629 suppression Effects 0.000 abstract description 25
PROBLEM TO BE SOLVED: To provide an electronic component in which occurrence of cracks in an element body is suppressed.SOLUTION: A multilayer capacitor C1 includes: an element body 3; an external electrode 5; and an insulating film I. The element body 3 has a rectangular parallelepiped shape and has a main surface 3a as a mounting surface and a side surface 3c adjacent to the main surface 3a. The external electrode 5 includes: an electrode portion 5a disposed on the main surface 3a; and an electrode portion 5c arranged on the side surface 3c and connected to the electrode portion 5a. The insulating film I continuously covers part of an edge 5aof the electrode portion 5a and an edge 5cof the electrode portion 5c.SELECTED DRAWING: Figure 2
There is known an electronic component that includes an element body and an external electrode disposed on the element body (see, for example, Patent Document 1). The element body has a first main surface and a first side surface adjacent to the first main surface. The external electrode has a first electrode portion disposed on the first main surface and a second electrode portion disposed on the first side surface and connected to the first electrode portion. . The first main surface is a mounting surface facing an electronic device (for example, a circuit board or an electronic component) on which the electronic component is solder-mounted.
Japanese Patent Laid-Open No. 06-069063
An object of one aspect of the present invention is to provide an electronic component in which occurrence of cracks in an element body is suppressed.
As a result of our research, the following matters were found. When the electronic component is solder-mounted on the electronic device, an external force that acts on the electronic component from the electronic device may act as stress on the element body from the solder fillet formed at the time of solder mounting through the external electrode. At this time, the stress is located in the vicinity of the edge of the external electrode, in particular, the edge of the first electrode part located on the first principal surface that is the mounting surface, and the first principal surface in the second electrode part. Since there is a tendency to concentrate on the edge of the portion, there is a possibility that cracks may occur in the element body starting from these edges.
An electronic component according to an aspect of the present invention has a rectangular parallelepiped shape, and includes a first main surface that is a mounting surface, and a first side surface that is adjacent to the first main surface. And an external electrode having a first electrode portion disposed on the first main surface and a second electrode portion disposed on the first side surface and connected to the first electrode portion And an insulating film continuously covering at least a part of the edge of the first electrode portion and the edge of the second electrode portion.
In the electronic component according to the one aspect of the present invention, the insulating film functions as a solder resist when the electronic component is solder-mounted on an electronic device. Since the insulating film continuously covers the edge of the first electrode part and at least a part of the edge of the second electrode part, the solder fillet is located on the first main surface. And the end edge of the portion located in the vicinity of the first main surface in the second electrode portion. For this reason, even when an external force acts on the electronic component through the solder fillet, it is difficult for stress to concentrate on the edge, and the edge is unlikely to be a starting point of a crack. Therefore, the generation of cracks in the element body is suppressed.
The insulating film may further continuously cover the first main surface and the first side surface along the edge of the first electrode portion and at least a part of the edge of the second electrode portion. In this embodiment, the edge of the first electrode part and at least a part of the edge of the second electrode part are reliably covered with the insulating film. Therefore, the edge is more unlikely to become a starting point of a crack.
The element body further includes a second main surface facing the first main surface and a second side surface facing the first side surface, and the external electrode is disposed on the second main surface. And a third electrode portion connected to the second electrode portion, and a fourth electrode portion disposed on the second side surface and connected to the first electrode portion and the third electrode portion, The insulating film may continuously cover each edge of the first electrode part, the second electrode part, the third electrode part, and the fourth electrode part. In this embodiment, even when the external electrode has the first electrode portion, the second electrode portion, the third electrode portion, and the fourth electrode portion, the occurrence of cracks in the element body is reliably suppressed.
The insulating film includes a first main surface, a first side surface, a second main surface, and a second side surface along each edge of the first electrode portion, the second electrode portion, the third electrode portion, and the fourth electrode portion. May be further continuously covered. In this embodiment, each edge of the first electrode portion, the second electrode portion, the third electrode portion, and the fourth electrode portion is reliably covered with the insulating film. Therefore, the edge is more unlikely to become a starting point of a crack.
The element body further includes a second main surface facing the first main surface, and the external electrode is disposed on the second main surface and is connected to the second electrode portion. The insulating film may continuously cover each edge of the first electrode portion, the second electrode portion, and the third electrode portion. In this embodiment, even when the external electrode has the first electrode portion, the second electrode portion, and the third electrode portion, the occurrence of cracks in the element body is reliably suppressed.
The insulating film may further continuously cover the first main surface, the first side surface, and the second main surface along each edge of the first electrode portion, the second electrode portion, and the third electrode portion. Good. In this embodiment, each edge of the first electrode portion, the second electrode portion, and the third electrode portion is reliably covered with the insulating film. Therefore, the edge is more unlikely to become a starting point of a crack.
The element body further includes a second side surface facing the first side surface, and the external electrode is disposed on the second side surface and has a third electrode portion connected to the first electrode portion. Further, the insulating film may continuously cover the edge of the first electrode part and only a part of each edge of the second electrode part and the third electrode part. In this embodiment, even when the external electrode has the first electrode portion, the second electrode portion, and the third electrode portion, the occurrence of cracks in the element body is reliably suppressed.
The insulating film further continues the first main surface, the first side surface, and the second side surface along the edge of the first electrode portion and only a part of each edge of the second electrode portion and the third electrode portion. It may be covered. In this embodiment, the edge of the first electrode part and only a part of each edge of the second electrode part and the third electrode part are reliably covered with the insulating film. Therefore, the edge is more unlikely to become a starting point of a crack.
The length in the direction orthogonal to the first main surface of the insulating film covering each edge of the second electrode portion and the third electrode portion with respect to the length of the element body in the direction orthogonal to the first main surface The ratio may be 0.1 or more and 0.4 or less. In this embodiment, the size of the insulating film is reduced while ensuring the effect of suppressing the occurrence of cracks. As a result, low cost is achieved.
The element body further includes a first end surface adjacent to the first main surface and the first side surface, the external electrode further includes an electrode portion disposed on the first end surface, and the electrode portion is an insulating film. May be exposed. In this embodiment, when the electronic component is solder-mounted on the electronic device, a solder fillet is formed on the electrode portion disposed on the first end surface. For this reason, the mounting strength of the electronic component is ensured.
Parallel to the first main surface and the first side surface of the portion of the insulating film located on the first electrode portion with respect to the length of the first electrode portion in the direction parallel to the first main surface and the first side surface The ratio of the length in any direction may be 0.3 or more. In this embodiment, the stress is less likely to concentrate due to the edge of the first electrode portion. Therefore, the generation of cracks in the element body is further suppressed.
According to one aspect of the present invention, it is possible to provide an electronic component in which the occurrence of cracks in the element body is suppressed.
1 is a plan view of a multilayer capacitor according to a first embodiment. 1 is a side view of a multilayer capacitor according to a first embodiment. It is a figure for demonstrating the cross-sectional structure of the multilayer capacitor which concerns on 1st Embodiment. It is a figure for demonstrating the cross-sectional structure of the multilayer capacitor which concerns on 1st Embodiment. It is a figure for demonstrating the mounting structure of the multilayer capacitor which concerns on 1st Embodiment. It is a top view of the multilayer capacitor which concerns on the modification of 1st Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor concerning other modifications of the first embodiment. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor concerning other modifications of the first embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer feedthrough capacitor concerning a 2nd embodiment. It is a side view of the multilayer feedthrough capacitor concerning a 2nd embodiment. It is a figure for demonstrating the cross-sectional structure of the multilayer feedthrough capacitor which concerns on 2nd Embodiment. It is a figure for demonstrating the cross-sectional structure of the multilayer feedthrough capacitor which concerns on 2nd Embodiment. It is a top view of the multilayer penetration capacitor concerning the modification of a 2nd embodiment. It is a top view of the multilayer feedthrough capacitor concerning this modification. It is a side view of the multilayer feedthrough capacitor concerning this modification. It is a top view of the multilayer capacitor concerning a 3rd embodiment. It is a top view of the multilayer capacitor concerning a 3rd embodiment. It is a side view of the multilayer capacitor concerning a 3rd embodiment. It is a top view of the multilayer capacitor which concerns on the modification of 3rd Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor which concerns on the modification of 3rd Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor which concerns on the modification of 3rd Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor which concerns on the modification of 3rd Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor which concerns on the modification of 3rd Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification. It is a top view of the multilayer capacitor concerning a 4th embodiment. It is a side view of the multilayer capacitor concerning a 4th embodiment. It is a top view of the multilayer capacitor which concerns on the modification of 4th Embodiment. It is a top view of the multilayer capacitor concerning this modification. It is a side view of the multilayer capacitor concerning this modification.
The configuration of the multilayer capacitor C1 according to the first embodiment will be described with reference to FIGS. FIG. 1 is a plan view of the multilayer capacitor in accordance with the first embodiment. FIG. 2 is a side view of the multilayer capacitor in accordance with the first embodiment. 3 and 4 are diagrams for explaining a cross-sectional configuration of the multilayer capacitor in accordance with the first embodiment. In the first embodiment, a multilayer capacitor C1 will be described as an example of an electronic component.
As shown in FIGS. 1 and 2, the multilayer capacitor C <b> 1 includes an element body 3 having a rectangular parallelepiped shape and a pair of external electrodes 5 disposed on the outer surface of the element body 3. . The pair of external electrodes 5 are separated from each other. The rectangular parallelepiped shape includes a rectangular parallelepiped shape in which corners and ridges are chamfered, and a rectangular parallelepiped shape in which corners and ridges are rounded.
The element body 3 has, as its outer surface, a pair of rectangular main surfaces 3a and 3b facing each other, a pair of rectangular side surfaces 3c facing each other, and a pair of end surfaces 3e facing each other. And have. The direction in which the pair of main surfaces 3a, 3b are opposed is the first direction D1, the direction in which the pair of side surfaces 3c is opposed is the second direction D2, and the direction in which the pair of end surfaces 3e is opposed. It is the third direction D3.
The first direction D1 is a direction orthogonal to the main surfaces 3a and 3b, and is orthogonal to the second direction D2. The third direction D3 is a direction parallel to the main surfaces 3a and 3b and the side surfaces 3c, and is orthogonal to the first direction D1 and the second direction D2. In the first embodiment, the length of the element body 3 in the third direction D3 is larger than the length of the element body 3 in the first direction D1 and larger than the length of the element body 3 in the second direction D2. The third direction D3 is the longitudinal direction of the element body 3.
The pair of side surfaces 3c extends in the first direction D1 so as to connect the pair of main surfaces 3a and 3b. The pair of side surfaces 3c also extends in the third direction D3. The pair of end surfaces 3e extends in the first direction D1 so as to connect the pair of main surfaces 3a and 3b. The pair of end surfaces 3e also extend in the second direction D2. Each main surface 3a, 3b is adjacent to a pair of side surfaces 3c and a first end surface 3e.
The element body 3 is configured by laminating a plurality of dielectric layers in a direction (first direction D1) in which the pair of main surfaces 3a and 3b are opposed to each other. In the element body 3, the stacking direction of the plurality of dielectric layers coincides with the second direction D2. Each dielectric layer is made of a sintered body of a ceramic green sheet containing a dielectric material (dielectric ceramic such as BaTiO 3 series, Ba (Ti, Zr) O 3 series, or (Ba, Ca) TiO 3 series), for example. It is configured. In the actual element body 3, the dielectric layers are integrated so that the boundary between the dielectric layers is not visible. In the element body 3, the stacking direction of the plurality of dielectric layers may coincide with the second direction D2.
The multilayer capacitor C1 includes a plurality of internal electrodes 7 and 9, respectively, as shown in FIGS. The internal electrodes 7 and 9 are made of a conductive material that is normally used as an internal electrode of a laminated electric element. As the conductive material, a base metal (for example, Ni or Cu) is used. The internal electrodes 7 and 9 are configured as a sintered body of a conductive paste containing the conductive material. In the first embodiment, the internal electrodes 7 and 9 are made of Ni.
The internal electrode 7 and the internal electrode 9 are arranged at different positions (layers) in the first direction D1. That is, the internal electrodes 7 and the internal electrodes 9 are alternately arranged in the element body 3 so as to face each other with a gap in the first direction D1. The internal electrode 7 and the internal electrode 9 have different polarities. When the stacking direction of the plurality of dielectric layers is the second direction D2, the internal electrode 7 and the internal electrode 9 are arranged at different positions (layers) in the second direction D2. One end portions of the internal electrodes 7 and 9 are exposed at the corresponding end surface 3e.
The external electrodes 5 are disposed on the end face 3 e side of the element body 3, that is, at the end portions of the element body 3. The external electrode 5 includes an electrode portion 5a disposed on the main surface 3a, an electrode portion 5b disposed on the main surface 3b, an electrode portion 5c disposed on the pair of side surfaces 3c, and a corresponding end surface 3e. It has the electrode part 5e arrange | positioned. The external electrode 5 is formed on five surfaces including a pair of main surfaces 3a and 3b, a pair of side surfaces 3c, and one end surface 3e. Adjacent electrode portions 5a, 5b, 5c and 5e are connected at the ridge portion of the element body 3 and are electrically connected.
The electrode portion 5e disposed on the end surface 3e covers all the one end portions exposed on the end surfaces 3e of the corresponding internal electrodes 7 and 9. The internal electrodes 7 and 9 are directly connected to the corresponding electrode part 5e. The internal electrodes 7 and 9 are electrically connected to the corresponding external electrode 5.
Each external electrode 5 has a sintered metal layer. The sintered metal layer is formed, for example, by applying a conductive paste to the outer surface of the element body 3 and baking it. In the conductive paste, a metal powder (for example, a powder made of Cu or Ni), a glass component, an organic binder, and an organic solvent are mixed. The sintered metal layer is a layer obtained by sintering the metal powder contained in the conductive paste. Each external electrode 5 may have a plating layer formed on the sintered metal layer.
The multilayer capacitor C1 is solder-mounted on an electronic device (for example, a circuit board or an electronic component). In the multilayer capacitor C1, the main surface 3a is a mounting surface facing the electronic device.
The multilayer capacitor C1 includes a pair of insulating films I as shown in FIGS. Insulating film I along the edge 5c e edge 5a e and the electrode portions 5c of the electrode portions 5a, covers a part of the portion of the external electrode 5 and the body 3. The electrode portion 5b, the electrode portion 5e, and the main surface 3b are not covered with the insulating film I.
Insulating film I, a part of the edge 5a e and edge 5c e along the (main surface 3a side of the portion in the first direction D1) only, only a part of the edge 5a e and edge 5c e And the main surface 3a and the side surface 3c are continuously covered. The insulating film I is located on the film portion Ia located on the electrode portion 5a, the film portion Ib located on the electrode portion 5c, the film portion Ic located on the main surface 3a, and the side surface 3c. The film portion Id is formed. Each film part Ia, Ib, Ic, Id is formed integrally.
The surface of the electrode portion 5a has a region covered with an insulating film I (membrane portion Ia) along the edge 5a e, and a region exposed from the insulating film I. The region exposed from the insulating film I is located closer to the end surface 3e than the region covered with the film portion Ia. The surface of the electrode portion 5c has a region covered with an insulating film I (membrane portion Ib) along the edge 5c e, and a region exposed from the insulating film I.
The main surface 3a has a region covered with an insulating film I (membrane portion Ic) along the edge 5a e, and a region exposed from the insulating film I. As viewed from the first direction D1, the region located between the pair of insulating films I (film portions Ic) on the main surface 3a is exposed. Side 3c has a region covered with an insulating film I (membrane portion Id) along the edge 5c e, and a region exposed from the insulating film I.
In the first embodiment, the ratio (L1 / L2) of each length L1 in the first direction D1 between the film part Ib and the film part Id to the length L2 in the first direction D1 of the element body 3 is 0. .1 or more and 0.4 or less. Further, the ratio (L3 / L4) of the length L3 in the third direction D3 of the film portion Ia to the length L4 in the third direction D3 of the electrode portion 5a is 0.3 or more.
The insulating film I is made of an electrically insulating material (for example, insulating resin or glass). In the first embodiment, the insulating film I is made of an insulating resin such as an epoxy resin. The insulating film I is formed, for example, by applying an insulating resin coating agent and solidifying it. For the application of the insulating resin coating agent, a screen printing method, a spray coating method, or the like can be used. As the insulating resin coating agent, a thermosetting insulating resin coating agent, an ultraviolet curable insulating resin coating agent, or a coating agent containing both of these insulating resin coating agents can be used.
As shown in FIG. 5, when the multilayer capacitor C1 is solder-mounted on the electronic device ED, the insulating film I functions as a solder resist. The electronic device ED is, for example, a circuit board or another electronic component. FIG. 5 is a view for explaining the multilayer capacitor mounting structure according to the first embodiment.
Insulating film I is, since the only part of the edge 5a e and edge 5c e covers continuously, solder fillets SF is, edges 5a e, and a portion of the end edge 5c e (electrode portion The edge of the part located in the vicinity of the main surface 3a in 5c) is not reached. Therefore, even when external force is applied to the multilayer capacitor C1 through the solder fillets SF, edge 5a e, stress is hardly concentrated on the 5c e, edges 5a e, 5c e hardly become a starting point of cracks. Therefore, in the multilayer capacitor C1, the occurrence of cracks in the element body 3 is suppressed.
In the first embodiment, the insulating film I, along with Mito some edge 5a e and edge 5c e, since continuously covers the main surface 3a and the side surface 3c, and the edges 5a e a portion of the end edge 5c e are reliably covered with the insulating film I. Therefore, the multilayer capacitor C1, the edge 5a e, 5c e hardly more become a starting point of cracks.
In the first embodiment, since the entire electrode portion 5e is exposed from the insulating film I, a solder fillet SF is formed on the electrode portion 5e as shown in FIG. For this reason, the mounting strength of the multilayer capacitor C1 is ensured.
In the first embodiment, the ratio (L1 / L2) of each length L1 of the film part Ib and the film part Id to the length L2 of the element body 3 is 0.1 or more and 0.4 or less. In this case, the size of the insulating film I is reduced while ensuring the effect of suppressing the occurrence of cracks. Therefore, the low cost of the multilayer capacitor C1 can be achieved. If the ratio (L1 / L2) is less than 0.1, the edges 5a e, large stress acts on the 5c e, edges 5a e, 5c e tends to be a starting point of cracks.
In the first embodiment, the ratio (L3 / L4) of the length L3 of the film portion Ia to the length L4 of the electrode portion 5a is 0.3 or more. In this case, since the stress is less likely to be concentrated by the edge 5 a e , the occurrence of cracks in the element body 3 is further suppressed. That is, when the ratio (L3 / L4) is less than 0.3, a large stress acting on the edge 5a e, easy edge 5a e becomes a starting point of cracks.
Next, the configuration of the multilayer capacitor C2 according to the modification of the first embodiment will be described with reference to FIGS. 6 and 7 are plan views of the multilayer capacitor in accordance with this modification. FIG. 8 is a side view of the multilayer capacitor in accordance with this modification.
Similar to the multilayer capacitor C1, the multilayer capacitor C2 includes an element body 3, a pair of external electrodes 5, a plurality of internal electrodes 7, and a plurality of internal electrodes 9 (not shown). In the multilayer capacitor C2, the shape of the insulating film I is different from that of the multilayer capacitor C1.
The multilayer capacitor C2 includes a pair of insulating films I as shown in FIGS. The insulating film I includes a part of the external electrode 5 and a part of the element body 3 along the edge 5a e of the electrode part 5a, the edge 5b e of the electrode part 5b, and the edge 5c e of the electrode part 5c. Covering. The electrode portion 5e is not covered with the insulating film I.
Insulating film I is the edge 5a e, end edge 5b e, and along all of the edges 5c e, edges 5a e, end edge 5b e, and with an edge 5c e covers continuously, The main surface 3a, the main surface 3b, and the side surface 3c are continuously covered. The insulating film I is located on the film portion Ia located on the electrode portion 5a, the film portion Ib located on the electrode portion 5c, the film portion Ic located on the main surface 3a, and the side surface 3c. A film part Id, a film part Ie located on the electrode part 5b, and a film part If located on the main surface 3b. Each film part Ia, Ib, Ic, Id, Ie, If is integrally formed.
The surface of the electrode portion 5a has a region covered with an insulating film I (membrane portion Ia) along the edge 5a e, and a region exposed from the insulating film I. The region exposed from the insulating film I on the surface of the electrode portion 5a is located closer to the end surface 3e than the region covered with the film portion Ia. The surface of the electrode portion 5c has a region covered with an insulating film I (membrane portion Ib) along the edge 5c e, and a region exposed from the insulating film I. The region exposed from the insulating film I on the surface of the electrode portion 5c is located closer to the end face 3e than the region covered with the film portion Ib. The surface of the electrode portion 5b has a region covered with an insulating film I (membrane portion Ie) along the end edge 5b e, and a region exposed from the insulating film I. The region exposed from the insulating film I on the surface of the electrode portion 5b is located closer to the end face 3e than the region covered with the film portion Ie.
The main surface 3a has a region covered with an insulating film I (membrane portion Ic) along the edge 5a e, and a region exposed from the insulating film I. As viewed from the first direction D1, the region located between the pair of insulating films I (film portions Ic) on the main surface 3a is exposed. Side 3c has a region covered with an insulating film I (membrane portion Id) along the edge 5c e, and a region exposed from the insulating film I. As viewed from the second direction D2, the region located between the pair of insulating films I (film portions Id) on the side surface 3c is exposed. Major surface 3b has a region covered with an insulating film I (membrane portion If) along the end edge 5b e, and a region exposed from the insulating film I. As viewed from the first direction D1, the region located between the pair of insulating films I (film portions If) on the main surface 3b is exposed.
The ratio (L5 / L6) of the length L5 in the third direction D3 of the film portion Ie to the length L6 in the third direction D3 of the electrode portion 5b is 0.3 or more. In this modification, the length L5 is equivalent to the length L3, and the length L6 is equivalent to the length L4. “Equivalent” may be equivalent to a value including a slight difference or a manufacturing error in a preset range in addition to being equal. For example, if a plurality of values are included in a range of ± 5% of the average value of the plurality of values, the plurality of values are defined to be equivalent.
In this modification, the insulating film I has edge 5a e, end edge 5b e, and since all the edges 5c e covers continuously, is reliably prevented from cracking in the element 3 The Further, since the insulating film I continuously covers the main surface 3a, the main surface 3b, and the side surface 3c along all of the end edge 5a e , the end edge 5b e , and the end edge 5c e , the end edge All of 5a e , the edge 5b e , and the edge 5c e are reliably covered with the insulating film I. Therefore, the edges 5a e and edge 5c e hardly more become a starting point of cracks.
The multilayer capacitor C2 can be mounted using the main surface 3a as a mounting surface, or can be mounted using the main surface 3b as a mounting surface. Therefore, the directionality when mounting the multilayer capacitor C2 is lost, and the mounting workability is improved.
Next, the configuration of multilayer capacitors C3 and C4 according to another modification of the first embodiment will be described with reference to FIGS. 9, 11 and 12 are plan views of the multilayer capacitor in accordance with this modification. 10 and 13 are side views of the multilayer capacitor in accordance with this modification.
Each multilayer capacitor C3, C4 includes an element body 3, a pair of external electrodes 5, a plurality of internal electrodes 7 (not shown), and a plurality of internal electrodes 9 (not shown), like the multilayer capacitors C1, C2. Yes. In the multilayer capacitor C3, the shape of the element body 3 is different from that of the multilayer capacitor C1. In the multilayer capacitor C4, the shape of the element body 3 is different from that of the multilayer capacitor C2.
In the multilayer capacitors C3 and C4, the length of the element body 3 in the second direction D2 is larger than the length of the element body 3 in the first direction D1 and larger than the length of the element body 3 in the third direction D3. . The second direction D2 is the longitudinal direction of the element body 3.
Even in each modification, the generation of cracks in the element body 3 is suppressed. In the multilayer capacitor C3, and a portion of the edge 5a e and edge 5c e, because it is securely covered with an insulating film I, the multilayer capacitor C1, the edge 5a e, 5c e is more crack It is difficult to become the starting point of In the multilayer capacitor C4, since all of the edge 5a e , the edge 5b e , and the edge 5c e are reliably covered with the insulating film I, the edge 5a e and the edge 5c e are further cracked. It is difficult to become a starting point.
With reference to FIGS. 14-17, the structure of the multilayer feedthrough capacitor C5 which concerns on 2nd Embodiment is demonstrated. FIG. 14 is a plan view of the multilayer feedthrough capacitor according to the second embodiment. FIG. 15 is a side view of the multilayer feedthrough capacitor according to the second embodiment. 16 and 17 are views for explaining a cross-sectional configuration of the multilayer feedthrough capacitor according to the second embodiment. In the second embodiment, a multilayer feedthrough capacitor C5 will be described as an example of an electronic component.
As shown in FIGS. 14 and 15, the multilayer feedthrough capacitor C <b> 5 includes an element body 3, a pair of external electrodes 13 and a pair of external electrodes 15 disposed on the outer surface of the element body 3. The pair of external electrodes 13 and the pair of external electrodes 15 are separated from each other. The pair of external electrodes 13 function as signal terminal electrodes, for example, and the pair of external electrodes 15 function as ground terminal electrodes, for example.
The multilayer feedthrough capacitor C5 includes a plurality of internal electrodes 17 and 19, respectively, as shown in FIGS. Like the internal electrodes 7 and 9, the internal electrodes 17 and 19 are made of a conductive material that is normally used as an internal electrode of a laminated electric element. Also in the second embodiment, the internal electrodes 17 and 19 are made of Ni.
The internal electrode 17 and the internal electrode 19 are disposed at different positions (layers) in the first direction D1. That is, the internal electrodes 17 and the internal electrodes 19 are alternately arranged in the element body 3 so as to face each other with a gap in the first direction D1. The internal electrode 17 and the internal electrode 19 have different polarities. When the stacking direction of the plurality of dielectric layers is the second direction D2, the internal electrode 17 and the internal electrode 19 are arranged at different positions (layers) in the second direction D2. The ends of the internal electrodes 17 are exposed on the pair of end faces 3e. The ends of the internal electrodes 19 are exposed on the pair of side surfaces 3c.
The external electrode 13 is disposed at the end of the element body 3 in the third direction D3. The external electrode 13 includes an electrode portion 13a disposed on the main surface 3a, an electrode portion 13b disposed on the main surface 3b, an electrode portion 13c disposed on the pair of side surfaces 3c, and a corresponding end surface 3e. The electrode part 13e arrange | positioned in this. The external electrode 13 is formed on five surfaces including a pair of main surfaces 3a and 3b, a pair of side surfaces 3c, and one end surface 3e. The adjacent electrode portions 13a, 13b, 13c, and 13e are connected at the ridge portion of the element body 3, and are electrically connected.
The electrode portion 13e disposed on the end surface 3e covers all the end portions exposed to the end surface 3e of the internal electrode 17. The internal electrode 17 is directly connected to each electrode part 13e. The internal electrode 17 is electrically connected to the pair of external electrodes 13.
The external electrode 15 is disposed at the central portion of the element body 3 in the third direction D3. The external electrode 15 has an electrode portion 15a disposed on the main surface 3a, an electrode portion 15b disposed on the main surface 3b, and an electrode portion 15c disposed on the side surface 3c. The external electrode 15 is formed on three surfaces of a pair of main surfaces 3a and 3b and one side surface 3c. The adjacent electrode portions 15a, 15b, and 15c are connected at the ridge portion of the element body 3, and are electrically connected.
The electrode portion 15 c disposed on the side surface 3 c covers all the end portions exposed to the side surface 3 c of the internal electrode 19. The internal electrode 19 is directly connected to each electrode portion 15c. The internal electrode 19 is electrically connected to the pair of external electrodes 15.
Each external electrode 13, 15 has a sintered metal layer like the external electrode 5. Each external electrode 13 and 15 may have a plating layer formed on the sintered metal layer.
The multilayer feedthrough capacitor C5 is also solder-mounted on the electronic device. In the multilayer feedthrough capacitor C5, the main surface 3a is a mounting surface facing the electronic device.
The multilayer feedthrough capacitor C5 includes a pair of insulating films I1 and a pair of insulating films I2, as shown in FIGS. As with the insulating film I, the insulating film I1 and the insulating film I2 are made of an electrically insulating material (for example, insulating resin or glass). In the present embodiment, the insulating film I1 and the insulating film I2 are made of an insulating resin such as an epoxy resin, like the insulating film I.
Insulating film I1 along the edge 13c e edge 13a e and the electrode portion 13c of the electrode portions 13a, and covers a part of the portion of the external electrode 13 and the body 3. The electrode part 13b, the electrode part 13e, and the main surface 3b are not covered with the insulating film I1.
Insulating film I1, a portion of the edge 13a e and edge 13c e along the (main surface 3a side of the portion in the first direction D1) only, only a portion of the edge 13a e and the edge 13c e And the main surface 3a and the side surface 3c are continuously covered. The insulating film I1 is positioned on the film portion I1a located on the electrode portion 13a, the film portion I1b located on the electrode portion 13c, the film portion I1c located on the main surface 3a, and the side surface 3c. A film portion I1d. The film portions I1a, I1b, I1c, and I1d are integrally formed.
The surface of the electrode portion 13a has a region covered with an insulating film I1 (membrane portion I1a) along the edge 13a e, and a region exposed from the insulating film I1. The region exposed from the insulating film I1 is located closer to the end surface 3e than the region covered with the film portion I1a. The surface of the electrode portion 13c has a region covered with an insulating film I1 (membrane portion I1b) along the edge 13c e, and a region exposed from the insulating film I1.
The main surface 3a has a region covered with an insulating film I1 (membrane portion I1c) along the edge 13a e, and a region exposed from the insulating film I1. Side 3c has a region covered with an insulating film I1 (membrane portion I1d) along the edge 13c e, and a region exposed from the insulating film I1.
In the second embodiment, the ratio (L11 / L2) of each length L11 in the first direction D1 between the film part I1b and the film part I1d to the length L2 in the first direction D1 of the element body 3 is 0. .1 or more and 0.4 or less. Further, the ratio (L13 / L14) of the length L13 in the third direction D3 of the film portion I1a to the length L14 in the third direction D3 of the electrode portion 13a is 0.3 or more.
Insulating film I2 along the edge 15c e edge 15a e and the electrode portion 15c of the electrode portions 15a, and covers a part of the portion of the external electrode 15 and the element body 3. The electrode portion 15b and the main surface 3b are not covered with the insulating film I2.
Insulating film I2 is part of the edge 15a e and edge 15c e along the (main surface 3a side of the portion in the first direction D1) only, only a portion of the edge 15a e and the edge 15c e And the main surface 3a and the side surface 3c are continuously covered. The insulating film I2 is located on the film portion I2a located on the electrode portion 15a, the film portion I2b located on the electrode portion 15c, the film portion I2c located on the main surface 3a, and the side surface 3c. The film portion I2d is formed. Each film part I2a, I2b, I2c, I2d is integrally formed.
The surface of the electrode portion 15a has a region covered with an insulating film I2 (membrane portion I2a) along the edge 15a e, and a region exposed from the insulating film I2. The surface of the electrode portion 15c has a region covered with an insulating film I2 (membrane portion I2b) along the edge 15c e, and a region exposed from the insulating film I2.
The main surface 3a has a region covered with an insulating film I2 (membrane portion I2c) along the edge 15a e, and a region exposed from the insulating film I2. Side 3c has a region covered with an insulating film I2 (membrane portion I2d) along the edge 15c e, and a region exposed from the insulating film I2.
In the second embodiment, the ratio (L21 / L2) of each length L21 in the first direction D1 between the film part I2b and the film part I2d to the length L2 in the first direction D1 of the element body 3 is 0. .1 or more and 0.4 or less. The ratio (L23 / L15) of the length L23 in the second direction D2 of the film part I2a to the length L15 in the second direction D2 of the electrode portion 15a is 0.3 or more.
Since the insulating film I1 continuously covers the end edge 13a e and only a part of the end edge 13c e , the solder fillet has the end edge 13a e and a part of the end edge 13c e (electrode portion 13c). The edge of the portion located in the vicinity of the main surface 3a in FIG. Since the insulating film I2 covers the only part of the edge 15a e and edge 15c e consecutively, the solder fillet, edges 15a e, and a portion of edge 15c e (electrode portion 15c The edge of the portion located in the vicinity of the main surface 3a in FIG. Therefore, even when external force is applied to the multilayer feedthrough capacitor C5 through solder fillet edges 13a e, 13c e, 15a e , stress is hardly concentrated on 15c e, edge 13a e, 13c e, 15a e , 15c e is unlikely to be the starting point of cracks. Therefore, in the multilayer feedthrough capacitor C5, the occurrence of cracks in the element body 3 is suppressed.
In the second embodiment, since the insulating film I1 continuously covers the main surface 3a and the side surface 3c along only the edge 13a e and a part of the edge 13c e , the edge 13a e a portion of the edge 13c e are reliably covered with the insulating film I1. Insulating film I2 along the part edge 15a e and the edge 15c e mito, since continuously covers the main surface 3a and the side surface 3c, the edge 15a e and the edge 15c e one Are reliably covered with the insulating film I2. Therefore, in the multilayer feedthrough capacitor C5, the edges 13a e , 13c e , 15a e , and 15c e are more unlikely to become the starting point of the crack.
In the second embodiment, since the entire electrode part 13b is exposed from the insulating film I1, a solder fillet is formed on the electrode part 13b. Moreover, since the surface of the electrode part 15c has the area | region exposed from the insulating film I2, a solder fillet is formed in the said area | region. For this reason, the mounting strength of the multilayer feedthrough capacitor C5 is ensured.
In the second embodiment, the ratio (L11 / L2) of each length L11 of the film part I1b and the film part I1d to the length L2 of the element body 3 is 0.1 or more and 0.4 or less. The ratio (L21 / L2) of each length L21 of the film part I2b and the film part I2d to the length L2 of the element body 3 is 0.1 or more and 0.4 or less. In these cases, the size of the insulating films I1 and I2 is reduced while ensuring the effect of suppressing the occurrence of cracks. Therefore, the low cost of the multilayer feedthrough capacitor C5 can be achieved.
In the second embodiment, the ratio (L13 / L14) of the length L13 of the film portion I1a to the length L14 of the electrode portion 13a is 0.3 or more. The ratio (L23 / L15) of the length L23 of the film portion I2a to the length L15 of the electrode portion 15a is 0.3 or more. In these cases, since the stress is less likely to be concentrated by the end edges 13a e and 15a e , the occurrence of cracks in the element body 3 is further suppressed.
Next, the configuration of the multilayer feedthrough capacitor C6 according to the modification of the second embodiment will be described with reference to FIGS. 18 and 19 are plan views of the multilayer feedthrough capacitor according to this modification. FIG. 20 is a side view of the multilayer feedthrough capacitor according to this modification.
Similarly to the multilayer feedthrough capacitor C5, the multilayer feedthrough capacitor C6 includes an element body 3, a pair of external electrodes 13, a pair of external electrodes 15, a plurality of internal electrodes 17 (not shown), and a plurality of internal electrodes 19 (not shown). It has. In the multilayer feedthrough capacitor C6, the shape of the insulating films I1 and I2 is different from that of the multilayer feedthrough capacitor C5.
The multilayer feedthrough capacitor C6 includes a pair of insulating films I1 as shown in FIGS. Insulating film I1 is edge 13a e of the electrode unit 13a, the edge 13b e of the electrode portion 13b, and along the edge 13c e of the electrode portion 13c, and a portion of the part and the element body 3 of the external electrodes 13 Covering. The electrode portion 13e is not covered with the insulating film I1.
Insulating film I1 is edge 13a e, edges 13b e, and along all of the edges 13c e, edge 13a e, edges 13b e, and with an edge 13c e covers continuously, The main surface 3a, the main surface 3b, and the side surface 3c are continuously covered. The insulating film I1 is located on the film portion I1a located on the electrode portion 13a, the film portion I1b located on the electrode portion 13c, the film portion I1c located on the main surface 3a, and the side surface 3c. A film portion I1d, a film portion I1e located on the electrode portion 13b, and a film portion I1f located on the main surface 3b. The film portions I1a, I1b, I1c, I1d, I1e, and I1f are integrally formed.
The surface of the electrode portion 13a has a region covered with an insulating film I1 (membrane portion I1a) along the edge 13a e, and a region exposed from the insulating film I1. The region exposed from the insulating film I1 on the surface of the electrode portion 13a is located closer to the end surface 3e than the region covered with the film portion I1a. The surface of the electrode portion 13c has a region covered with an insulating film I1 (membrane portion I1b) along the edge 13c e, and a region exposed from the insulating film I1. The region exposed from the insulating film I1 on the surface of the electrode portion 13c is located closer to the end face 3e than the region covered with the film portion I1b. The surface of the electrode portion 13b has a region covered with an insulating film I1 (membrane portion Ile) along the edge 13b e, and a region exposed from the insulating film I1. The region exposed from the insulating film I1 on the surface of the electrode portion 13b is located closer to the end surface 3e than the region covered with the film portion I1e.
The main surface 3a has a region covered with an insulating film I1 (membrane portion I1c) along the edge 13a e, and a region exposed from the insulating film I1. Side 3c has a region covered with an insulating film I1 (membrane portion I1d) along the edge 13c e, and a region exposed from the insulating film I1. Major surface 3b has a region covered with an insulating film I1 (membrane portion I1F) along the edge 13b e, and a region exposed from the insulating film I1.
The multilayer feedthrough capacitor C6 includes a pair of insulating films I2 as shown in FIGS. Insulating film I2 is edge 15a e of the electrode portions 15a, the edge 15b e of the electrode portion 15b, and along the edge 15c e of the electrode portion 15c, and a portion of the part and the element body 3 of the external electrodes 15 Covering.
Insulating film I2 is edge 15a e, edges 15b e, and along all of the edges 15c e, edges 15a e, edges 15b e, and with an edge 15c e covers continuously, The main surface 3a, the main surface 3b, and the side surface 3c are continuously covered. The insulating film I2 is located on the film portion I2a located on the electrode portion 15a, the film portion I2b located on the electrode portion 15c, the film portion I2c located on the main surface 3a, and the side surface 3c. A film portion I2d, a film portion I2e located on the electrode portion 15b, and a film portion I2f located on the main surface 3b. The film portions I2a, I2b, I2c, I2d, I2e, and I2f are integrally formed.
The surface of the electrode portion 15a has a region covered with an insulating film I2 (membrane portion I2a) along the edge 15a e, and a region exposed from the insulating film I2. The surface of the electrode portion 15c has a region covered with an insulating film I2 (membrane portion I2b) along the edge 15c e, and a region exposed from the insulating film I2. The surface of the electrode portion 15b has a region covered with an insulating film I2 (membrane portion I2e) along the edge 15b e, and a region exposed from the insulating film I2.
The main surface 3a has a region covered with an insulating film I2 (membrane portion I2c) along the edge 15a e, and a region exposed from the insulating film I2. Side 3c has a region covered with an insulating film I2 (membrane portion I2d) along the edge 15c e, and a region exposed from the insulating film I2. Major surface 3b has a region covered with an insulating film I2 (membrane portion I2f) along the edge 15b e, and a region exposed from the insulating film I2.
The ratio (L16 / L17) of the length L16 in the third direction D3 of the film portion I2e to the length L17 in the third direction D3 of the electrode portion 13b is 0.3 or more. In this modification, the length L16 is equivalent to the length L13, and the length L17 is equivalent to the length L14.
The ratio (L25 / L18) of the length L25 in the second direction D2 of the film portion I2a to the length L18 in the second direction D2 of the electrode portion 15b is 0.3 or more. In this modification, the length L18 is equivalent to the length L15, and the length L25 is equivalent to the length L23.
In this modification, the insulating film I1 continuously covers all of the edge 13a e , the edge 13b e , and the edge 13c e , and the insulating film I2 includes the edge 15a e and the edge 15b e. , and since all the edges 15c e covers continuously, it is reliably prevented from cracking in the body 3.
Since the insulating film I1 continuously covers the main surface 3a, the main surface 3b, and the side surface 3c along all of the end edge 13a e , the end edge 13b e , and the end edge 13c e , the end edge 13a e All of the edge 13b e and the edge 13c e are reliably covered with the insulating film I1. Since the insulating film I2 continuously covers the main surface 3a, the main surface 3b, and the side surface 3c along all of the end edge 15a e , the end edge 15b e , and the end edge 15c e , the end edge 15a e The edge 15b e and the edge 15c e are all covered with the insulating film I2. For this reason, the end edge 13a e , the end edge 13c e , the end edge 15a e , and the end edge 15c e are more unlikely to become a starting point of a crack.
The multilayer feedthrough capacitor C6 can be mounted with the main surface 3a as a mounting surface or can be mounted with the main surface 3b as a mounting surface. Therefore, the directionality when mounting the multilayer feedthrough capacitor C6 is lost, and the mounting workability is improved.
The configuration of the multilayer capacitor C7 according to the third embodiment will be described with reference to FIGS. 21 and 22 are plan views of the multilayer capacitor in accordance with the third embodiment. FIG. 23 is a side view of the multilayer capacitor in accordance with the third embodiment. In the third embodiment, a multilayer capacitor C7 will be described as an example of an electronic component.
The multilayer capacitor C7 includes an element body 3, a plurality of external electrodes 21, and a plurality of internal electrodes (not shown). The plurality of external electrodes 21 are disposed on the outer surface of the element body 3 and are separated from each other. In the present embodiment, the multilayer capacitor C7 has eight external electrodes 21. The number of external electrodes 21 is not limited to eight.
Each external electrode 21 has an electrode portion 21a disposed on the main surface 3a, an electrode portion 21b disposed on the main surface 3b, and an electrode portion 21c disposed on the side surface 3c. . The external electrode 21 is formed on three surfaces of a pair of main surfaces 3a and 3b and one side surface 3c. The adjacent electrode portions 21a, 21b, and 21c are connected at the ridge portion of the element body 3, and are electrically connected.
The electrode portion 21c arranged on the side surface 3c covers all the end portions exposed to the side surface 3c of the corresponding internal electrode. The electrode portion 21c is directly connected to the corresponding internal electrode. The external electrode 21 is electrically connected to the corresponding internal electrode.
The external electrode 21 has a sintered metal layer like the external electrodes 5, 13 and 15. The external electrode 21 may also have a plating layer formed on the sintered metal layer.
The multilayer capacitor C7 is also solder-mounted on the electronic device. In the multilayer capacitor C7, the main surface 3a is a mounting surface facing the electronic device.
As shown in FIGS. 21 to 23, the multilayer capacitor C7 includes a plurality of insulating films I3. The insulating film I3 is made of an electrically insulating material (for example, insulating resin or glass), like the insulating films I, I1, and I2. In the present embodiment, the insulating film I3 is made of an insulating resin such as an epoxy resin, like the insulating films I, I1, and I2.
Insulating film I3 along the edge 21c e edge 21a e and the electrode portion 21c of the electrode portions 21a, and covers a part of the portion of the external electrode 21 and the body 3. The electrode portion 21b, the main surface 3b, and the pair of end surfaces 3e are not covered with the insulating film I3.
The insulating film I3 includes only the edge 21a e and a part of the edge 21c e along only the edge 21a e and a part of the edge 21c e (portion near the main surface 3a in the first direction D1). And the main surface 3a and the side surface 3c are continuously covered. The insulating film I3 is located on the film portion I3a located on the electrode portion 21a, the film portion I3b located on the electrode portion 21c, the film portion I3c located on the main surface 3a, and the side surface 3c. It has a film portion I3d. The film portions I3a, I3b, I3c, and I3d are integrally formed.
The surface of the electrode portion 21a has a region covered with an insulating film I3 (membrane portion I3a) along the edge 21a e, and a region exposed from the insulating film I3. The surface of the electrode portion 21c has a region covered with an insulating film I3 (membrane portion I3b) along the edge 21c e, and a region exposed from the insulating film I3.
The main surface 3a has a region covered with an insulating film I3 (membrane portion I3c) along the edge 21a e, and a region exposed from the insulating film I3. Side 3c has a region covered with an insulating film I3 (membrane portion I3D) along the edge 21c e, and a region exposed from the insulating film I3.
In the third embodiment, the ratio (L31 / L2) of each length L31 in the first direction D1 of the film portion I3b to the length L2 in the first direction D1 of the element body 3 is 0.1 or more and 0.00. 4 or less. The ratio (L32 / L33) of the length L32 in the second direction D2 of the film portion I3a to the length L33 in the second direction D2 of the electrode portion 21a is 0.3 or more.
Since the insulating film I3 continuously covers only the end edge 21a e and only a part of the end edge 21c e , the solder fillet has the end edge 21a e and a part of the end edge 21c e (electrode portion 21c). The edge of the portion located in the vicinity of the main surface 3a in FIG. Therefore, even when external force is applied to the multilayer capacitor C7 through solder fillet edges 21a e, stress is hardly concentrated on 21c e, the edge 21a e, 21c e hardly become a starting point of cracks. Therefore, in the multilayer capacitor C7, the occurrence of cracks in the element body 3 is suppressed.
In the third embodiment, the insulating film I3 along the Mito part edge 21a e and the edge 21c e, since continuously covers the main surface 3a and the side surface 3c, and the edge 21a e a portion of the edge 21c e are reliably covered with the insulating film I3. Therefore, in the multilayer capacitor C7, the edge 21a e, 21c e hardly more become a starting point of cracks.
In the third embodiment, since the surface of the electrode portion 21c has a region exposed from the insulating film I3, a solder fillet is formed in the region. For this reason, the mounting strength of the multilayer capacitor C7 is ensured.
In the third embodiment, the ratio (L31 / L2) of the length L31 of the film portion I3b to the length L2 of the element body 3 is not less than 0.1 and not more than 0.4. In this case, the size of the insulating film I3 is reduced while ensuring the effect of suppressing the occurrence of cracks. Therefore, the low cost of the multilayer capacitor C7 can be achieved.
In the third embodiment, the ratio (L32 / L33) of the length L32 of the film portion I3a to the length L33 of the electrode portion 21a is 0.3 or more. In this case, since the stress is less likely to be concentrated by the edge 21 a e , the generation of cracks in the element body 3 is further suppressed.
Next, the configuration of the multilayer capacitor C8 according to a modification of the third embodiment will be described with reference to FIGS. 24 and 25 are plan views of the multilayer capacitor in accordance with this modification. FIG. 26 is a side view of the multilayer capacitor in accordance with this modification.
Similarly to the multilayer capacitor C7, the multilayer capacitor C8 includes the element body 3, the plurality of external electrodes 21, and the plurality of internal electrodes (not shown). In the multilayer capacitor C8, the shape of the insulating film I3 is different from that of the multilayer capacitor C7.
The multilayer capacitor C8 includes a plurality of insulating films I3 as shown in FIGS. Insulating film I3 is edge 21a e of the electrode unit 21a, the edge 21b e of the electrode portion 21b, and along the edge 21c e of the electrode portion 21c, and a part of the portion of the external electrode 21 and the body 3 Covering.
Insulating film I3 is edge 21a e, edges 21b e, and along all of the edges 21c e, the edge 21a e, edges 21b e, and with an edge 21c e covers continuously, The main surface 3a, the main surface 3b, and the side surface 3c are continuously covered. The insulating film I3 is located on the film portion I3a located on the electrode portion 21a, the film portion I3b located on the electrode portion 21c, the film portion I3c located on the main surface 3a, and the side surface 3c. A film portion I3d, a film portion I3e located on the electrode portion 21b, and a film portion I3f located on the main surface 3b. The film portions I3a, I3b, I3c, I3d, I3e, and I3f are integrally formed.
The surface of the electrode portion 21a has a region covered with an insulating film I3 (membrane portion I3a) along the edge 21a e, and a region exposed from the insulating film I3. The surface of the electrode portion 21c has a region covered with an insulating film I3 (membrane portion I3b) along the edge 21c e, and a region exposed from the insulating film I3. The surface of the electrode portion 21b has a region covered with an insulating film I3 (membrane portion I3e) along the edge 21b e, and a region exposed from the insulating film I3.
The main surface 3a has a region covered with an insulating film I3 (membrane portion I3c) along the edge 21a e, and a region exposed from the insulating film I3. Side 3c has a region covered with an insulating film I3 (membrane portion I3D) along the edge 21c e, and a region exposed from the insulating film I3. Major surface 3b has a region covered with an insulating film I3 (membrane portion I3F) along the edge 21b e, and a region exposed from the insulating film I3.
The ratio (L35 / L36) of the length L35 in the second direction D2 of the film portion I3a to the length L36 in the second direction D2 of the electrode portion 21b is 0.3 or more. In this modification, the length L35 is equivalent to the length L32, and the length L36 is equivalent to the length L33.
In the present modification, the insulating film I3 continuously covers all of the end edge 21a e , end edge 21b e , and end edge 21c e , so that the occurrence of cracks in the element body 3 is reliably suppressed. The Since the insulating film I3 continuously covers the main surface 3a, the main surface 3b, and the side surface 3c along all of the end edge 21a e , the end edge 21b e , and the end edge 21c e , the end edge 21a e The edge 21b e and the edge 21c e are all reliably covered with the insulating film I3. For this reason, the end edge 21a e , the end edge 21c e , the end edge 21a e , and the end edge 21c e are more unlikely to be the starting point of a crack.
The multilayer capacitor C8 can be mounted with the main surface 3a as a mounting surface, or can be mounted with the main surface 3b as a mounting surface. Therefore, the directionality when mounting the multilayer capacitor C8 is lost, and mounting workability is improved.
Next, a configuration of the multilayer capacitor C9 according to the modification of the third embodiment will be described with reference to FIGS. 27 and 28 are plan views of the multilayer capacitor in accordance with this modification. FIG. 29 is a side view of the multilayer capacitor in accordance with this modification.
Similarly to the multilayer capacitors C7 and C8, the multilayer capacitor C9 includes the element body 3, a plurality of external electrodes 21, and a plurality of internal electrodes (not shown). The multilayer capacitor C9 is different from the multilayer capacitor C7 in that it further includes an insulating film I4.
As illustrated in FIGS. 28 and 29, the multilayer capacitor C9 includes a plurality of insulating films I4. The insulating film I4 is made of an electrically insulating material (for example, insulating resin or glass), like the insulating films I, I1, I2, and I3. In the present embodiment, the insulating film I4 is made of an insulating resin such as an epoxy resin, like the insulating films I, I1, I2, and I3.
Insulating film I4 along the edge 21c e edge 21b e and the electrode portion 21c of the electrode portion 21b, and covers a part of the portion of the external electrode 21 and the body 3. The electrode portion 21a, the main surface 3a, and the pair of end surfaces 3e are not covered with the insulating film I4.
Insulating film I4, a part of the edge 21b e and edge 21c e along the (main surface 3b side of the portion in the first direction D1) only, only a part of the edge 21b e and the edge 21c e And the main surface 3b and the side surface 3c are continuously covered. The insulating film I4 is positioned on the film portion I4a located on the electrode portion 21b, the film portion I4b located on the electrode portion 21c, the film portion I4c located on the main surface 3b, and the side surface 3c. The film portion I4d is formed. The film portions I4a, I4b, I4c, and I4d are integrally formed.
The surface of the electrode portion 21b has a region covered with an insulating film I4 (membrane portion I4a) along the edge 21b e, and a region exposed from the insulating film I4. The surface of the electrode portion 21c has a region covered with an insulating film I4 (membrane portion I4b) along the edge 21c e, and a region exposed from the insulating film I4.
Major surface 3b has a region covered with an insulating film I4 (membrane portion I4c) along the edge 21b e, and a region exposed from the insulating film I4. Side 3c has a region covered with an insulating film I4 (membrane portion I4d) along the edge 21c e, and a region exposed from the insulating film I4.
In this modification, the ratio (L37 / L2) of each length L37 in the first direction D1 of the film portion I4b to the length L2 in the first direction D1 of the element body 3 is 0.1 or more and 0.4. It is as follows. The ratio (L38 / L39) of the length L38 in the second direction D2 of the film portion I4a to the length L39 in the second direction D2 of the electrode portion 21b is 0.3 or more.
The multilayer capacitor C9 can also be mounted with the main surface 3a as a mounting surface, or can be mounted with the main surface 3b as a mounting surface. Therefore, the directionality when mounting the multilayer capacitor C9 is lost, and the mounting workability is improved.
Even if the major surface 3b is the mounting surface, an insulating film and I4, since the only part of the edge 21b e and the edge 21c e are continuously covers, the solder fillet, edges 21b e, and It does not reach the portion of the end edge 21c e (edge portion positioned in the vicinity of the main surface 3b at the electrode portion 21c). Therefore, even when external force is applied to the multilayer capacitor C9 through solder fillet edges 21b e, stress is hardly concentrated on 21c e, edges 21b e, 21c e hardly become a starting point of cracks. Therefore, in the multilayer capacitor C9, the occurrence of cracks in the element body 3 is suppressed.
In this modification, the insulating film I4, along with a portion of the end edge 21b e and the edge 21c e mito, since continuously covers the major surface 3b and the side surface 3c, the edge 21b e and the end and part of the edge 21c e are reliably covered with the insulating film I4. Therefore, in the multilayer capacitor C9, the end edges 21b e and 21c e are more unlikely to become the starting point of the crack.
In the present modification, since the surface of the electrode portion 21c has a region exposed from the insulating film I4, a solder fillet is formed in the region. For this reason, the mounting strength of the multilayer capacitor C9 is ensured.
In this modification, the ratio (L37 / L2) of the length L37 of the film portion I4b to the length L2 of the element body 3 is 0.1 or more and 0.4 or less. In this case, the size of the insulating film I4 is reduced while ensuring the effect of suppressing the occurrence of cracks. Therefore, the low cost of the multilayer capacitor C9 can be achieved.
In this modification, the ratio (L38 / L39) of the length L38 of the film portion I4a to the length L39 of the electrode portion 21b is 0.3 or more. In this case, since it is difficult to concentrate more stress by edge 21b e, the cracks occur in the element 3 is further suppressed.
Next, with reference to FIGS. 30 to 38, the configuration of a modification of the multilayer capacitors C7, C8, C9 will be described. 30, FIG. 31, FIG. 33, FIG. 34, FIG. 36, and FIG. 27 are plan views of multilayer capacitors according to this modification. 32, 35, and 38 are side views of the multilayer capacitor in accordance with this modification.
As shown in FIGS. 30 to 38, in the multilayer capacitors C7, C8, and C9, the material between the insulating films I3 and I4 has the same electrical insulating property as the insulating films I3 and I4 (in this modification example, It may be covered with an insulating resin). As shown in FIGS. 30 to 32, in the modification of the multilayer capacitor C7, the entire main surface 3a is covered with a material having electrical insulation. As shown in FIGS. 33 to 35, in the modification of the multilayer capacitor C8, the entire region exposed from the external electrode 21 on the outer surface of the element body 3 is covered with a material having electrical insulation. . As shown in FIGS. 36 to 38, in the modification of the multilayer capacitor C9, the entire main surface 3a and the entire main surface 3b are covered with an electrically insulating material.
With reference to FIGS. 39 and 40, the structure of the multilayer capacitor C10 in accordance with the fourth embodiment will be explained. FIG. 39 is a plan view of the multilayer capacitor in accordance with the fourth embodiment. FIG. 40 is a side view of the multilayer capacitor in accordance with the fourth embodiment. Also in the fourth embodiment, a multilayer capacitor C10 will be described as an example of an electronic component.
The multilayer capacitor C10 includes an element body 3, a plurality of external electrodes 31, and a plurality of internal electrodes (not shown). The plurality of external electrodes 31 are disposed on the outer surface of the element body 3 and are separated from each other. In the present embodiment, the multilayer capacitor C <b> 10 has four external electrodes 31.
The length of the element body 3 in the first direction D1 is smaller than the length of the element body 3 in the second direction D2, and smaller than the length of the element body 3 in the third direction D3. The length of the element body 3 in the second direction D2 is equal to the length of the element body 3 in the third direction D3.
Each external electrode 31 is disposed at each corner of the element body 3. Each external electrode 31 has an electrode portion 31a disposed on the main surface 3a, an electrode portion 31b disposed on the main surface 3b, and an electrode portion 31c disposed on the side surface 3c and the end surface 3e. doing. The external electrode 31 is formed on four surfaces of a pair of main surfaces 3a and 3b, one side surface 3c, and one end surface 3e. The electrode portions 31a, 31b, 31c adjacent to each other are connected at the ridge portion of the element body 3, and are electrically connected.
The electrode portions 31c arranged on the side surface 3c and the end surface 3e cover all the exposed end portions on the side surface 3c and the end surface 3e of the corresponding internal electrode. The electrode part 31c is directly connected to the corresponding internal electrode. The external electrode 31 is electrically connected to the corresponding internal electrode.
Similar to the external electrodes 5, 13, 15, and 21, the external electrode 31 has a sintered metal layer. The external electrode 31 may also have a plating layer formed on the sintered metal layer.
The multilayer capacitor C10 is also solder-mounted on the electronic device. In the multilayer capacitor C10, the main surface 3a is a mounting surface facing the electronic device.
As shown in FIGS. 39 and 40, the multilayer capacitor C10 includes a plurality of insulating films I5. The insulating film I5 is made of an electrically insulating material (for example, insulating resin or glass), like the insulating films I, I1, I2, I3, and I4. In the present embodiment, the insulating film I5 is made of an insulating resin such as an epoxy resin, like the insulating films I, I1, I2, I3, and I4.
Insulating film I5 is edge 31a e of the electrode portions 31a and, along the edge 31c e of the electrode portion 31c, and covers a part of the portion of the external electrode 31 and the body 3. The electrode part 31b and the main surface 3b are not covered with the insulating film I5.
Insulating film I5 includes edge 31a e, part of the edge 31c e along the (main surface 3a side of the portion in the first direction D1) only, a portion of the end edge 31a e and the edge 31c e Only the main surface 3a, the side surface 3c, and the end surface 3e are continuously covered. The insulating film I5 includes a film portion I5a located on the electrode portion 31a, a film portion I5b located on the electrode portion 31c, a film portion I5c located on the main surface 3a, and the side surface 3c and the end surface. It has a film part I5d located on 3e. The film portions I5a, I5b, I5c, and I5d are integrally formed.
The surface of the electrode portion 31a has a region covered with an insulating film I5 (membrane portion I5a) along the edge 31a e, and a region exposed from the insulating film I5. The surface of the electrode portion 31c has a region covered with an insulating film I5 (membrane portion I5b) along the edge 31c e, and a region exposed from the insulating film I5.
The main surface 3a has a region covered with an insulating film I5 (membrane portion I5d) along the edge 31a e, and a region exposed from the insulating film I5. Side 3c and the end face 3e has a region covered with an insulating film I5 (membrane portion I5e) along the edge 31c e, and a region exposed from the insulating film I5.
Insulating film I5 is, since the only part of the end edge 31a e and the edge 31c e are continuously covers, the solder fillet, mainly in some (electrode portion 31c of the end edge 31a e and the edge 31c e The edge of the portion located in the vicinity of the surface 3a) is not reached. Therefore, even when external force is applied to the multilayer capacitor C10 through solder fillet edges 31a e, stress is hardly concentrated on 31c e, edges 31a e, 31c e hardly become a starting point of cracks. Therefore, in the multilayer capacitor C10, the generation of cracks in the element body 3 is suppressed.
In the fourth embodiment, the insulating film I5 continuously covers the main surface 3a, the side surface 3c, and the end surface 3e along the end edge 31a e and only a part of the end edge 31c e. a part of the e and the edge 31c e are reliably covered with the insulating film I3. Therefore, in the multilayer capacitor C7, the end edges 31a e and 31c e are more unlikely to become crack starting points.
In the third embodiment, since the surface of the electrode portion 31c has a region exposed from the insulating film I5, a solder fillet is formed in the region. For this reason, the mounting strength of the multilayer capacitor C10 is ensured.
In the fourth embodiment, the ratio (L41 / L2) of each length L41 in the first direction D1 of the film portions I5b and I5d to the length L2 in the first direction D1 of the element body 3 is 0.1 or more. 0.4 or less. In this case, the size of the insulating film I5 is reduced while ensuring the effect of suppressing the occurrence of cracks. Therefore, the low cost of the multilayer capacitor C10 can be achieved.
Next, the configuration of the multilayer capacitor C11 according to a modification of the fourth embodiment will be described with reference to FIGS. 41 and 42 are plan views of the multilayer capacitor in accordance with this modification. FIG. 43 is a side view of the multilayer capacitor in accordance with this modification.
Similar to the multilayer capacitor C10, the multilayer capacitor C11 includes an element body 3, a plurality of external electrodes 31, and a plurality of internal electrodes (not shown). In the multilayer capacitor C11, the shape of the insulating film I5 is different from that of the multilayer capacitor C10.
As shown in FIGS. 41 to 43, the multilayer capacitor C11 includes a plurality of insulating films I5. The insulating film I5 includes a part of the outer electrode 31 and a part of the element body 3 along the edge 31a e of the electrode part 31a, the edge 31c e of the electrode part 31c, and the edge 31b e of the electrode part 31b. Covering.
Insulating film I5 is edge 31a e, edges 31b e, and along all of the edges 31c e, edges 31a e, edges 31b e, and with an edge 31c e covers continuously, The main surface 3a, the main surface 3b, the side surface 3c, and the end surface 3e are continuously covered. The insulating film I5 includes a film portion I5a located on the electrode portion 31a, a film portion I5b located on the electrode portion 31c, a film portion I5c located on the main surface 3a, the side surface 3c, and the end surface 3e. A film portion I5d located on the electrode portion 31b, and a film portion I5f located on the main surface 3b. The film portions I5a, I5b, I5c, I5d, I5e, and I5f are integrally formed.
The surface of the electrode portion 31a has a region covered with an insulating film I5 (membrane portion I5a) along the edge 31a e, and a region exposed from the insulating film I5. The surface of the electrode portion 31c has a region covered with an insulating film I5 (membrane portion I5b) along the edge 31c e, and a region exposed from the insulating film I5. The surface of the electrode portion 31b has a region covered with an insulating film I5 (membrane portion I5e) along the edge 31b e, and a region exposed from the insulating film I5.
The main surface 3a has a region covered with an insulating film I5 (membrane portion I5c) along the edge 31a e, and a region exposed from the insulating film I5. Side 3c and the end face 3e has a region covered with an insulating film I5 (membrane portion I5d) along the edge 31c e, and a region exposed from the insulating film I5. Major surface 3b has a region covered with an insulating film I5 (membrane portion I5f) along the edge 31b e, and a region exposed from the insulating film I5.
In this modification, the insulating film I5 is, the end edge 31a e, edges 31b e, and since all the edges 31c e covers continuously, is reliably prevented from cracking in the element 3 The The insulating film I5 continuously covers the main surface 3a, the main surface 3b, the side surface 3c, and the end surface 3e along all of the end edge 31a e , the end edge 31b e , and the end edge 31c e. All of the edge 31a e , the end edge 31b e , and the end edge 31c e are reliably covered with the insulating film I5. For this reason, the end edge 31a e , the end edge 31b e , and the end edge 31c e are more unlikely to be the starting point of a crack.
The multilayer capacitor C11 can be mounted with the main surface 3a as a mounting surface, or can be mounted with the main surface 3b as a mounting surface. Therefore, there is no directionality when mounting the multilayer capacitor C11, and mounting workability is improved.
In the multilayer capacitors C2, C4, C11 and the multilayer feedthrough capacitor C6, the insulating films I, I1, I2, I5 are formed in two parts in the first direction D1, as in the multilayer capacitor C9 shown in FIGS. It may be divided. That is, the insulating films I, I1, I2, and I5 may be divided into a portion located near the main surface 3a and a portion located near the main surface 3b.
In the multilayer capacitors C1 to C4, C10, and C11 and the multilayer feedthrough capacitors C5 and C6, the regions between the insulating films I, I1, I2, and I5 are different from the multilayer capacitors C7 to C9 shown in FIGS. The insulating films I, I1, I2, and I5 may be covered with the same material (for example, insulating resin) as that of the insulating film.
In the multilayer capacitors C7, C8, C9 shown in FIGS. 30 to 38, the end face 3e may not be covered with the insulating films I3, I4. That is, the entire end surface 3e may be exposed from the insulating films I3 and I4.
In the present embodiment, the multilayer capacitors C1 to C4, C7 to C11 and the multilayer feedthrough capacitors C5 and C6 have been described as examples of the electronic components. However, applicable electronic components are not limited to the multilayer capacitors and the multilayer feedthrough capacitors. The applicable electronic component is, for example, a multilayer electronic component such as a multilayer inductor, a multilayer varistor, a multilayer piezoelectric actuator, a multilayer thermistor, or a multilayer composite component, or an electronic component other than the multilayer electronic component.
3 ... Element body, 3a, 3b ... Main surface, 3c ... Side surface, 3e ... End face, 5, 13, 15, 21, 31 ... External electrode, 5a, 5b, 5c, 5e, 13a, 13b, 13c, 13e, 15a , 15b, 15c, 21a, 21b , 21c, 31a, 31b, 31c ... electrode portion, 5a e, 5b e, 5c e, 13a e, 13b e, 13c e, 15a e, 15b e, 15c e, 21a e, 21b e , 21c e , 31a e , 31b e , 31c e ... edge, C1 to C4, C7 to C11 ... multilayer capacitor, C5, C6 ... multilayer feedthrough capacitor, D1 ... first direction, D2 ... second direction, D3 ... third direction, I, I1, I2, I3, I4, I5 ... insulating film.
A solid body having a rectangular parallelepiped shape and having a first main surface that is a mounting surface and a first side surface adjacent to the first main surface;
An exterior having a first electrode portion disposed on the first main surface and a second electrode portion disposed on the first side surface and connected to the first electrode portion Electrodes,
An electronic component comprising: an edge of the first electrode portion; and an insulating film continuously covering at least a part of the edge of the second electrode portion.
The insulating film further continues the first main surface and the first side surface along the edge of the first electrode portion and the at least part of the edge of the second electrode portion. The electronic component according to claim 1, wherein the electronic component is covered.
The element body further includes a second main surface facing the first main surface and a second side surface facing the first side surface,
The external electrode is disposed on the second main surface and connected to the second electrode portion, and is disposed on the second side surface and the first electrode portion. A fourth electrode portion connected to the third electrode portion, and
The electronic component according to claim 1, wherein the insulating film continuously covers edges of the first electrode portion, the second electrode portion, the third electrode portion, and the fourth electrode portion.
The insulating film includes the first main surface, the first side surface, and the first side surface, along the edge of each of the first electrode portion, the second electrode portion, the third electrode portion, and the fourth electrode portion. The electronic component according to claim 3, further covering the second main surface and the second side surface.
The element body further has a second main surface facing the first main surface,
The external electrode further includes a third electrode portion disposed on the second main surface and connected to the second electrode portion,
The electronic component according to claim 1, wherein the insulating film continuously covers edges of the first electrode portion, the second electrode portion, and the third electrode portion.
The insulating film includes the first main surface, the first side surface, and the second main surface along each edge of the first electrode portion, the second electrode portion, and the third electrode portion. The electronic component according to claim 5, further covering continuously.
The element body further has a second side surface facing the first side surface,
The external electrode further includes a third electrode portion disposed on the second side surface and connected to the first electrode portion,
The said insulating film has covered the edge of said 1st electrode part, and only a part of each said edge of said 2nd electrode part and said 3rd electrode part of Claim 1 continuously. Electronic components.
The insulating film is formed along the first main surface, the first electrode along the edge of the first electrode portion and only the part of the edge of each of the second electrode portion and the third electrode portion. The electronic component according to claim 7, further covering the side surface and the second side surface continuously.
Orthogonal to the first main surface of the insulating film covering each edge of the second electrode portion and the third electrode portion with respect to the length of the element body in a direction orthogonal to the first main surface The electronic component according to claim 7 or 8, wherein a ratio of a length in the direction is 0.1 or more and 0.4 or less.
The element body further includes a first end surface adjacent to the first main surface and the first side surface,
The electronic component according to any one of claims 1 to 9, wherein the external electrode further includes an electrode portion disposed on the first end surface, and the electrode portion is exposed from the insulating film. .
The first main surface of the portion located on the first electrode portion in the insulating film with respect to the length of the first electrode portion in a direction parallel to the first main surface and the first side surface; The electronic component according to claim 1, wherein a length ratio in the direction parallel to the first side surface is 0.3 or more.
JP2016176695A 2016-09-09 2016-09-09 Electronic component Pending JP2018041909A (en)
JP2016176695A JP2018041909A (en) 2016-09-09 2016-09-09 Electronic component
US15/695,645 US20180075972A1 (en) 2016-09-09 2017-09-05 Electronic component
CN201710801128.1A CN107808774A (en) 2016-09-09 2017-09-07 Electronic unit
JP2018041909A true JP2018041909A (en) 2018-03-15
ID=61560938
JP2016176695A Pending JP2018041909A (en) 2016-09-09 2016-09-09 Electronic component
US (1) US20180075972A1 (en)
JP (1) JP2018041909A (en)
CN (1) CN107808774A (en)
CN109256286A (en) * 2018-09-10 2019-01-22 株洲宏达陶电科技有限公司 The preparation method of I-shaped four end ceramic capacitor
JPH09180957A (en) * 1995-12-22 1997-07-11 Kyocera Corp Multilayered ceramic capacitor
JP3459186B2 (en) * 1998-12-29 2003-10-20 マルコン電子株式会社 Manufacturing method of multilayer ceramic electronic component
2016-09-09 JP JP2016176695A patent/JP2018041909A/en active Pending
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CN107808774A (en) 2018-03-16
US20180075972A1 (en) 2018-03-15
JP6248644B2 (en) 2017-12-20 Electronic components
KR20110077785A (en) 2011-07-07 Multilayer ceramic capacitor
JP4835686B2 (en) 2011-12-14 Multilayer capacitor
2019-05-24 A621 Written request for application examination