WO2011155241A1 - 電子部品 - Google Patents
電子部品 Download PDFInfo
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- WO2011155241A1 WO2011155241A1 PCT/JP2011/056195 JP2011056195W WO2011155241A1 WO 2011155241 A1 WO2011155241 A1 WO 2011155241A1 JP 2011056195 W JP2011056195 W JP 2011056195W WO 2011155241 A1 WO2011155241 A1 WO 2011155241A1
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- WIPO (PCT)
- Prior art keywords
- electronic component
- conductor
- conductors
- coil
- external electrode
- Prior art date
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- 239000004020 conductor Substances 0.000 claims abstract description 224
- 238000007747 plating Methods 0.000 claims abstract description 14
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 239000012212 insulator Substances 0.000 claims description 49
- 238000000034 method Methods 0.000 abstract description 21
- 238000011144 upstream manufacturing Methods 0.000 description 33
- 239000000919 ceramic Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000012986 modification Methods 0.000 description 10
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- 229910000679 solder Inorganic materials 0.000 description 7
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- 238000005452 bending Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
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- 239000000696 magnetic material Substances 0.000 description 2
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/041—Printed circuit coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/003—Printed circuit coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/02—Mountings
- H01G2/06—Mountings specially adapted for mounting on a printed-circuit support
- H01G2/065—Mountings specially adapted for mounting on a printed-circuit support for surface mounting, e.g. chip capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/30—Stacked capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/35—Feed-through capacitors or anti-noise capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/40—Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0073—Printed inductances with a special conductive pattern, e.g. flat spiral
Definitions
- the present invention relates to an electronic component, and more particularly to an electronic component including a laminate and an external electrode.
- an electronic component described in Patent Document 1 As a conventional electronic component, for example, an electronic component described in Patent Document 1 is known.
- the electronic component includes an electronic component main body and external electrodes.
- the electronic component main body has a built-in circuit element and has a rectangular parallelepiped shape.
- the external electrode is provided so as to cover both ends of the electronic component main body in the longitudinal direction.
- a groove is provided on the surface of the external electrode.
- Patent Document 1 has a problem that the manufacturing cost becomes high.
- the electronic component since the net-like pattern is transferred after the external electrode is formed, a process for processing the external electrode is required after the external electrode is formed. As a result, in the electronic component, the number of manufacturing steps increases and the manufacturing cost increases.
- an object of the present invention is to provide an electronic component that can suppress deviation from a normal mounting position and can be manufactured at low cost.
- An electronic component includes a laminate in which a plurality of insulator layers are laminated, and a plurality of internal conductors provided on the insulator layer, the predetermined surface of the laminate A plurality of internal conductors having exposed portions exposed from the insulator layers, and external electrodes formed by plating on the predetermined surface so as to cover the exposed portions.
- the plurality of exposed portions do not have a uniform thickness or are not arranged at regular intervals in the stacking direction.
- 1 is an external perspective view of an electronic component according to a first embodiment. It is a disassembled perspective view of the laminated body of the electronic component which concerns on 1st Embodiment. It is a cross-section figure of an external electrode. It is a cross-sectional structure figure of the external electrode of the electronic component which concerns on a 1st modification. It is a disassembled perspective view of the laminated body of the electronic component which concerns on a 2nd modification. It is a disassembled perspective view of the laminated body of the electronic component which concerns on a 3rd modification. It is an external appearance perspective view of the electronic component which concerns on 2nd Embodiment. It is a disassembled perspective view of the laminated body of the electronic component which concerns on 2nd Embodiment.
- FIG. 1 is an external perspective view of an electronic component 10a according to the first embodiment.
- FIG. 2 is an exploded perspective view of the multilayer body 12 of the electronic component 10a according to the first embodiment.
- the stacking direction of the electronic component 10a is defined as the x-axis direction, and when viewed in plan from the x-axis direction, the direction along the short side of the electronic component 10a is defined as the z-axis direction, and the long side of the electronic component 10a
- the direction along is defined as the y-axis direction.
- the x axis, the y axis, and the z axis are orthogonal to each other.
- the electronic component 10a includes a laminated body (main body) 12, external electrodes 14 (14a and 14b), connection conductors (internal conductors) 20 (20a to 20s), and 22 (22a to 22s).
- the coil L and the via-hole conductors v21 to v38, v41 to v58 are provided.
- the laminated body 12 has a rectangular parallelepiped shape, and includes connection conductors 20 and 22, a coil L, and via-hole conductors v21 to v38 and v41 to v58.
- the surface on the negative direction side in the x-axis direction of the laminate 12 is defined as a lower surface S10.
- the lower surface S10 is a mounting surface and faces the circuit board when the electronic component 10a is mounted on the circuit board.
- the lower surface S10 is a surface parallel to the x-axis direction.
- the laminated body 12 is configured by laminating the insulating layers 16 (16a to 16t) so that they are arranged in this order from the negative direction side to the positive direction side in the x-axis direction.
- Each insulator layer 16 has a rectangular shape and is made of a magnetic material.
- the surface on the positive side in the x-axis direction of the insulator layer 16 is referred to as a front surface
- the surface on the negative direction side in the x-axis direction of the insulator layer 16 is referred to as a back surface.
- the coil L is composed of a coil conductor (inner conductor) 18 (18a to 18s) and via hole conductors v1 to v18. That is, the coil L is configured by connecting the coil conductors 18a to 18s by the via-hole conductors v1 to v18.
- the coil L has a coil axis extending in the x-axis direction, and has a spiral shape that advances from the negative side in the x-axis direction toward the positive side while rotating in the clockwise direction.
- the coil conductors 18a to 18s are respectively provided on the surfaces of the insulator layers 16a to 16s as shown in FIG.
- Each of the coil conductors 18a to 18s is made of a conductive material, has a number of turns of 3/4, and is formed by bending a linear conductor. That is, the coil conductors 18a to 18s have a shape in which a part (1/4) of the annular track is cut out.
- the upstream end in the clockwise direction is referred to as the upstream end
- the downstream end in the clockwise direction is referred to as the downstream end.
- the via-hole conductors v1 to v18 respectively penetrate the insulator layers 16b to 16s in the x-axis direction, and connect the coil conductors 18a to 18s. More specifically, the via-hole conductor v1 connects the downstream end of the coil conductor 18a and the upstream end of the coil conductor 18b. The via-hole conductor v2 connects the downstream end of the coil conductor 18b and the upstream end of the coil conductor 18c. The via-hole conductor v3 connects the downstream end of the coil conductor 18c and the upstream end of the coil conductor 18d. The via-hole conductor v4 connects the downstream end of the coil conductor 18d and the upstream end of the coil conductor 18e.
- the via-hole conductor v5 connects the downstream end of the coil conductor 18e and the upstream end of the coil conductor 18f.
- the via-hole conductor v6 connects the downstream end of the coil conductor 18f and the upstream end of the coil conductor 18g.
- the via-hole conductor v7 connects the downstream end of the coil conductor 18g and the upstream end of the coil conductor 18h.
- the via-hole conductor v8 connects the downstream end of the coil conductor 18h and the upstream end of the coil conductor 18i.
- the via-hole conductor v9 connects the downstream end of the coil conductor 18i and the upstream end of the coil conductor 18j.
- the via-hole conductor v10 connects the downstream end of the coil conductor 18j and the upstream end of the coil conductor 18k.
- the via-hole conductor v11 connects the downstream end of the coil conductor 18k and the upstream end of the coil conductor 18l.
- the via-hole conductor v12 connects the downstream end of the coil conductor 18l and the upstream end of the coil conductor 18m.
- the via-hole conductor v13 connects the downstream end of the coil conductor 18m and the upstream end of the coil conductor 18n.
- the via-hole conductor v14 connects the downstream end of the coil conductor 18n and the upstream end of the coil conductor 18o.
- the via-hole conductor v15 connects the downstream end of the coil conductor 18o and the upstream end of the coil conductor 18p.
- the via-hole conductor v16 connects the downstream end of the coil conductor 18p and the upstream end of the coil conductor 18q.
- the via-hole conductor v17 connects the downstream end of the coil conductor 18q and the upstream end of the coil conductor 18r.
- the via-hole conductor v18 connects the downstream end of the coil conductor 18r and the upstream end of the coil conductor 18s.
- connection conductors 20a to 20s are rectangular conductor layers provided on the surfaces of the insulator layers 16a to 16s so as to be in contact with the long side on the negative direction side in the z-axis direction. Accordingly, each of the connection conductors 20a to 20s has an exposed portion P1 exposed from between the insulator layers 16 on the lower surface S10 of the multilayer body 12. In FIG. 2, only the exposed portion P1 of the connection conductor 20a is provided with a reference numeral in order to prevent the drawing from becoming complicated.
- connection conductors 20a to 20s overlap each other when they are seen in plan view from the x-axis direction.
- the connection conductors 20a to 20s are exposed from the lower surface S10 into a rectangular region.
- the connection conductor 20a is connected to the upstream end of the coil conductor 18a.
- the via-hole conductors v21 to v38 respectively penetrate the insulator layers 16b to 16s in the x-axis direction, and are connected to each other to constitute one via-hole conductor. As shown in FIG. 2, the via-hole conductors v21 to v38 connect the connection conductors 20a to 20s.
- connection conductors 22a to 22s are located on the negative side in the y-axis direction from the connection conductors 20a to 20s, respectively.
- the connection conductors 22a to 22s are rectangular conductor layers provided on the surfaces of the insulator layers 16a to 16s so as to be in contact with the long side on the negative direction side in the z-axis direction. Accordingly, each of the connection conductors 22a to 22s has an exposed portion P2 exposed from between the insulator layers 16 on the lower surface S10 of the multilayer body 12. In FIG. 2, only the exposed portion P ⁇ b> 2 of the connection conductor 22 a is provided with a reference symbol in order to prevent the drawing from becoming complicated.
- connection conductors 22a to 22s overlap with each other when they are seen in a plan view from the x-axis direction. Thereby, when the insulator layer 16 is laminated, the connection conductors 22a to 22s are exposed from the lower surface S10 into a rectangular region. Further, as shown in FIG. 2, the connection conductor 22s is connected to the downstream end of the coil conductor 18s.
- the via-hole conductors v41 to v58 respectively penetrate the insulator layers 16b to 16s in the x-axis direction, and are connected to each other to constitute one via-hole conductor. As shown in FIG. 2, the via-hole conductors v41 to v58 connect the connection conductors 22a to 22s.
- the external electrodes 14a and 14b are provided so as to be arranged in the y-axis direction on the lower surface S10 of the multilayer body 12, as shown in FIG.
- the external electrode 14b is provided closer to the negative direction side in the y-axis direction than the external electrode 14a.
- the external electrode 14a is a rectangular conductor formed by plating on the lower surface S10 so as to cover the exposed portion P1 of the connection conductors 20a to 20s in FIG.
- the external electrode 14b is a rectangular conductor formed by plating on the lower surface S10 so as to cover the exposed portion P2 of the connection conductors 22a to 22s in FIG.
- FIG. 3 is a sectional structural view of the external electrode 14a.
- irregularities are formed on the surface of the external electrode 14a. Thereby, the surface area of the external electrode 14a is increased.
- the surface area of the external electrode 14a increases, the area of the solder that contacts the external electrode 14a increases when the electronic component 10a is mounted on the circuit board.
- the force with which the solder holds the external electrode 14a is increased. Therefore, in the reflow process, the electronic component 10a is prevented from being displaced from the normal mounting position.
- the exposed portions P1 are not arranged at equal intervals in the x-axis direction as shown in FIG. More specifically, the insulator layer 16 does not have a uniform thickness. Specifically, as shown in FIG. 3, the insulator layers 16c, 16d, 16g, and 16h have a thickness d1. On the other hand, the insulator layers 16e, 16f, 16i and 16j have a thickness d2 which is smaller than d1. The connection conductors 20c to 20i have a thickness t1.
- the spacing between the exposed portions P1 of the connection conductors 20b and 20c, between the exposed portions P1 of the connection conductors 20c and 20d, between the exposed portions P1 of the connection conductors 20f and 20g and between the exposed portions P1 of the connection conductors 20g and 20h is The distance between the exposed portions P1 of the connection conductors 20d and 20e, between the exposed portions P1 of the connection conductors 20e and 20f, between the exposed portions P1 of the connection conductors 20h and 20i, and between the exposed portions P1 of the connection conductors 20i and 20j is larger.
- the exposed portions P1 are not arranged at equal intervals, a region where the exposed portions P1 exist relatively densely and a region where the exposed portions P1 exist roughly are formed.
- the exposed portions P1 exist relatively densely in the region where the connection conductors 20d to 20f are provided, and the exposed portions P1 exist relatively coarsely in the region where the connection conductor 20c is provided. is doing.
- the external electrode 14a is formed by a plating process. Therefore, the external electrode 14a is easily formed in the region where the exposed portions P1 are relatively dense, and the external electrode 14a is difficult to be formed in the region where the exposed portions P1 are relatively rough.
- the thickness of the external electrode 14a is relatively large (h1 in FIG. 3), and the exposed portions P1 are relatively coarsely present. In the region, the thickness of the external electrode 14a is relatively small (in FIG. 3, h2 ⁇ h1). As described above, irregularities are formed on the surface of the external electrode 14a. Note that the reason why the unevenness is formed on the surface of the external electrode 14b is the same as the reason why the unevenness is formed on the surface of the external electrode 14a, and thus the description thereof is omitted.
- a ceramic green sheet to be the insulator layer 16 in FIG. 2 is prepared. Specifically, ferric oxide (Fe 2 O 3 ), zinc oxide (ZnO), copper oxide (CuO), and nickel oxide (NiO) were weighed at a predetermined ratio, and each material was put into a ball mill as a raw material. Wet preparation. The obtained mixture is dried and pulverized, and the obtained powder is calcined at 800 ° C. for 1 hour. The obtained calcined powder is wet pulverized by a ball mill, dried and then crushed to obtain a ferrite ceramic powder.
- ferric oxide Fe 2 O 3
- zinc oxide ZnO
- CuO copper oxide
- NiO nickel oxide
- a binder (vinyl acetate, water-soluble acrylic, etc.), a plasticizer, a wetting material, and a dispersing agent are added and mixed with a ball mill, and then defoamed under reduced pressure.
- the obtained ceramic slurry is formed into a sheet shape on a carrier sheet by a doctor blade method and dried to produce a ceramic green sheet to be the insulator layer 16.
- via-hole conductors v1 to v18, v21 to v38, and v41 to v58 are formed on the ceramic green sheets to be the insulator layers 16b to 16s, respectively.
- via holes are formed by irradiating a ceramic green sheet to be the insulator layers 16b to 16s with a laser beam.
- the via hole is filled with a conductive paste such as Ag, Pd, Cu, Au or an alloy thereof by a method such as printing.
- coil conductors 18a to 18s and connecting conductors 20a to 20s and 22a to 22s are formed on the surface of the ceramic green sheet to be the insulator layers 16a to 16s.
- a conductive paste mainly composed of Ag, Pd, Cu, Au, or an alloy thereof is screen-printed or photolithography-processed on the surface of the ceramic green sheet to be the insulator layers 16a to 16s.
- the coil conductors 18a to 18s and the connection conductors 20a to 20s and 22a to 22s are formed by applying the above method.
- the step of forming the coil conductors 18a to 18s and the connection conductors 20a to 20s, 22a to 22s and the step of filling the via holes with the conductive paste may be performed in the same step.
- the ceramic green sheets to be the insulator layers 16a to 16s are laminated and pressure-bonded in this order to obtain an unfired mother laminated body.
- Lamination and pressure bonding of the ceramic green sheets to be the insulator layers 16a to 16s are carried out one by one and temporarily bonded to obtain a mother laminated body, and then the unfired mother laminated body is pressed by a hydrostatic pressure press or the like. To perform final crimping.
- the mother laminated body is cut into a laminated body 12 having a predetermined size with a cutting blade. Thereby, the laminated body 12 in which the connection conductors 20 and 22 are exposed from the lower surface S10 is obtained.
- the unfired laminate 12 is subjected to binder removal treatment and firing.
- the binder removal treatment is performed, for example, in a low oxygen atmosphere at 500 ° C. for 2 hours. Firing is performed, for example, at 800 ° C. to 900 ° C. for 2.5 hours.
- Ni / Sn plating is performed by a plating method so as to cover the exposed portions P1 and P2 of the connection conductors 20 and 22 exposed from the lower surface S10, thereby forming the external electrodes 14a and 14b.
- the external electrodes 14a and 14b may be formed of a metal other than Ni and Sn that can be formed by a plating method, and an alloy.
- the insulating layer 16 having a non-uniform thickness is used in order to form irregularities on the surfaces of the external electrodes 14a and 14b. This eliminates the need to transfer a mesh pattern to the external electrodes 14a and 14b after the formation of the external electrodes 14a and 14b. Therefore, the number of manufacturing steps of the electronic component 10a can be reduced, and the electronic component 10a can be manufactured at low cost.
- FIG. 4 is a cross-sectional structure diagram of the external electrode 14a of the electronic component 10b according to the first modification.
- FIG.1 and FIG.2 is used about the external appearance perspective view of the electronic component 10b, and the exploded perspective view of the laminated body of the electronic component 10b.
- the exposed portions P1 are not arranged at regular intervals in the x-axis direction as shown in FIG.
- the exposed portion P1 does not have a uniform thickness in the z-axis direction, as will be described below.
- connection conductor 20 does not have a uniform thickness. That is, as shown in FIG. 4, the connection conductors 20e, 20f, 20h, 20i, and 20j have a thickness t1. On the other hand, the connection conductors 20c, 20d, 20g, and 20k have a thickness of t2. The insulator layer 16 has a thickness of d1.
- the exposed portion P1 does not have a uniform thickness, a region where the exposed portion P1 exists relatively densely and a region where the exposed portion P1 exists roughly are formed.
- the exposed portion P1 is relatively dense in the region where the connection conductors 20c, 20d, 20g, and 20k are provided, and the connection conductors 20e, 20f, 20h, 20i, and 20j are provided. In the region, the exposed portion P1 exists relatively coarsely.
- the external electrode 14a is formed by a plating process. Therefore, the external electrode 14a is easily formed in the region where the exposed portions P1 are relatively dense, and the external electrode 14a is difficult to be formed in the region where the exposed portions P1 are relatively rough.
- the thickness of the external electrode 14a is relatively large (h3 in FIG. 4), and the exposed portions P1 are relatively coarsely present. In the region, the thickness of the external electrode 14a is relatively small (in FIG. 4, h4 ⁇ h3). As described above, irregularities are formed on the surface of the external electrode 14a. Note that the reason why the unevenness is formed on the surface of the external electrode 14b is the same as the reason why the unevenness is formed on the surface of the external electrode 14a, and thus the description thereof is omitted.
- the coil conductor 18 and the connection conductors 20 and 22 are formed by screen printing. Therefore, the coil conductor 18 and the connection conductors 20 and 22 provided on the same insulator layer 16 have the same thickness. Therefore, in the electronic component 10b, the coil conductor 18 also has a non-uniform thickness in the x-axis direction.
- FIG. 5 is an exploded perspective view of the multilayer body 12 of the electronic component 10c according to the second modification.
- the difference between the electronic component 10a and the electronic component 10c is the configuration of the external electrodes 14a and 14b.
- the other points are not different between the electronic component 10a and the electronic component 10c, and thus description thereof is omitted.
- the external electrode 14a is provided not only on the lower surface S10 but also on the end surface on the positive side of the laminate 12 in the y-axis direction.
- the external electrode 14b is provided not only on the lower surface S10 but also on the end surface of the laminate 12 on the negative direction side in the y-axis direction. That is, the external electrodes 14a and 14b are L-shaped.
- connection conductors 20a to 20s are in contact with the short sides on the positive side in the y-axis direction of the insulating layers 16a to 16s so that the external electrodes 14a and 14b as described above are formed.
- the connection conductors 22a to 22s are in contact with the short sides of the insulator layers 16a to 16s on the negative direction side in the y-axis direction.
- the connection conductors 20a to 20s and 22a to 22s are exposed from the end surfaces of the laminated body 12 on the positive and negative sides in the y-axis direction. Therefore, the external electrodes 14a and 14b are formed in an L shape by a plating method.
- FIG. 6 is an exploded perspective view of the multilayer body 12 of the electronic component 10d according to the third modification.
- the difference between the electronic component 10a and the electronic component 10d is the configuration of the external electrodes 14a and 14b.
- the other points are not different between the electronic component 10a and the electronic component 10d, and thus the description thereof is omitted.
- the external electrodes 14a and 14b are provided not only on the lower surface S10, but also on the positive and negative side surfaces of the laminate 12 in the x-axis direction. That is, the external electrodes 14a and 14b are U-shaped.
- the insulator layer 17 is provided on the negative side in the x-axis direction from the insulator layer 16a so that the external electrodes 14a and 14b as described above are formed.
- Connection conductors 21 and 23 are provided on the back surface of the insulating layer 17. The connection conductors 21 and 23 overlap with the connection conductors 20 and 22, respectively. Further, connection conductors 20t and 22t are provided on the surface of the insulating layer 16t. Thereby, the external electrodes 14a and 14b are formed so as to form a U shape by a plating method.
- FIG. 7 is an external perspective view of an electronic component 10e according to the second embodiment.
- FIG. 8 is an exploded perspective view of the multilayer body 12 of the electronic component 10e according to the second embodiment.
- the stacking direction of the electronic component 10e is defined as the x-axis direction, and when viewed in plan from the x-axis direction, the direction along the short side of the electronic component 10e is defined as the z-axis direction, and the long side of the electronic component 10e is defined.
- the direction along is defined as the y-axis direction.
- the x axis, the y axis, and the z axis are orthogonal to each other.
- the electronic component 10e includes a laminate (main body) 12, external electrodes 14 (14a, 14b), connection conductors (internal conductors) 20 (20a to 20e), 22 (22a to 22e). And a coil L and via-hole conductors v60 to v63, v70 to v73.
- the laminated body 12 has a rectangular parallelepiped shape, and includes connection conductors 20 and 22, a coil L, and via-hole conductors v60 to v63 and v70 to v73.
- connection conductors 20 and 22 a coil L
- via-hole conductors v60 to v63 and v70 to v73 the surface on the negative direction side in the x-axis direction of the laminate 12 is defined as a lower surface S10.
- the laminated body 12 is configured by laminating the insulating layers 16 (16a to 16t) so that they are arranged in this order from the negative direction side to the positive direction side in the x-axis direction.
- Each insulator layer 16 has a rectangular shape and is made of a magnetic material.
- the surface on the positive side in the x-axis direction of the insulator layer 16 is referred to as a front surface
- the surface on the negative direction side in the x-axis direction of the insulator layer 16 is referred to as a back surface.
- the coil L is composed of coil conductors (inner conductors) 18 (18a to 18j) and via hole conductors v1 to v9. That is, the coil L is configured by connecting the coil conductors 18a to 18j by the via-hole conductors v1 to v9.
- the coil L has a coil axis extending in the x-axis direction, and has a spiral shape that advances from the negative side in the x-axis direction toward the positive side while rotating in the clockwise direction.
- the coil conductors 18a to 18j are provided on the surfaces of the insulator layers 16f to 16o, respectively, as shown in FIG.
- Each of the coil conductors 18 is made of a conductive material, has a number of turns of 3/4, and is formed by bending a linear conductor.
- the coil conductor 18a has a number of turns of 1/2. That is, the coil conductors 18a to 18j have a shape in which a part of the annular track is cut out.
- the upstream end portion in the clockwise direction is referred to as an upstream end
- the downstream end portion in the clockwise direction is referred to as a downstream end.
- the via-hole conductors v1 to v9 pass through the insulator layers 16g to 16o in the x-axis direction, and connect the coil conductors 18a to 18j. More specifically, the via-hole conductor v1 connects the downstream end of the coil conductor 18a and the upstream end of the coil conductor 18b. The via-hole conductor v2 connects the downstream end of the coil conductor 18b and the upstream end of the coil conductor 18c. The via-hole conductor v3 connects the downstream end of the coil conductor 18c and the upstream end of the coil conductor 18d. The via-hole conductor v4 connects the downstream end of the coil conductor 18d and the upstream end of the coil conductor 18e.
- the via-hole conductor v5 connects the downstream end of the coil conductor 18e and the upstream end of the coil conductor 18f.
- the via-hole conductor v6 connects the downstream end of the coil conductor 18f and the upstream end of the coil conductor 18g.
- the via-hole conductor v7 connects the downstream end of the coil conductor 18g and the upstream end of the coil conductor 18h.
- the via-hole conductor v8 connects the downstream end of the coil conductor 18h and the upstream end of the coil conductor 18i.
- the via-hole conductor v9 connects the downstream end of the coil conductor 18i and the upstream end of the coil conductor 18j.
- connection conductors 20a to 20e are rectangular conductor layers provided on the surfaces of the insulator layers 16b to 16f so as to be in contact with the long side on the negative direction side in the z-axis direction. Accordingly, each of the connection conductors 20a to 20e has an exposed portion P1 exposed from between the insulator layers 16 on the lower surface S10 of the multilayer body 12. In FIG. 2, only the exposed portion P1 of the connection conductor 20a is provided with a reference numeral in order to prevent the drawing from becoming complicated.
- connection conductors 20a to 20e overlap with each other when they are viewed in plan from the x-axis direction. Thereby, when the insulator layer 16 is laminated, the connection conductors 20a to 20e are exposed from the lower surface S10 into a rectangular region. Further, as shown in FIG. 8, the connection conductor 20e is connected to the upstream end of the coil conductor 18a.
- the via-hole conductors v60 to v63 penetrate the insulator layers 16c to 16f in the x-axis direction, and are connected to each other to constitute one via-hole conductor. As shown in FIG. 8, the via-hole conductors v60 to v63 are connected to the connection conductors 20a to 20e.
- connection conductors 22a to 22e are rectangular conductor layers provided on the surfaces of the insulator layers 16o to 16s so as to be in contact with the long side on the negative direction side in the z-axis direction. Accordingly, each of the connection conductors 22a to 22e has an exposed portion P2 exposed from between the insulator layers 16 on the lower surface S10 of the multilayer body 12. In FIG. 8, in order to prevent the drawing from becoming complicated, only the exposed portion P2 of the connection conductor 22a is provided with a reference symbol.
- connection conductors 22a to 22e are located on the positive side in the x-axis direction from the connection conductors 20a to 20e, respectively. Further, the connection conductors 20a to 20e and 22a to 22e overlap with each other when viewed in plan from the x-axis direction. Thereby, when the insulator layer 16 is laminated, the connection conductors 22a to 22e are exposed in the rectangular region from the lower surface S10 on the positive side in the x-axis direction with respect to the connection conductors 20a to 20e. Become. Furthermore, as shown in FIG. 8, the connection conductor 22a is connected to the downstream end of the coil conductor 18j.
- the via-hole conductors v70 to v73 respectively penetrate the insulator layers 16p to 16s in the x-axis direction, and are connected to each other to constitute one via-hole conductor. As shown in FIG. 8, the via-hole conductors v70 to v73 connect the connection conductors 22a to 22e.
- External electrodes 14a and 14b are provided so as to be aligned in the x-axis direction on the lower surface S10 of the multilayer body 12, as shown in FIG.
- the external electrode 14b is provided closer to the positive direction side in the x-axis direction than the external electrode 14a.
- the external electrode 14a is a rectangular conductor formed by plating on the lower surface S10 so as to cover the exposed portion P1 of the connection conductors 20a to 20e in FIG.
- the external electrode 14b is a rectangular conductor formed by plating on the lower surface S10 so as to cover the exposed portion P2 of the connection conductors 22a to 22e in FIG.
- irregularities are formed on the surfaces of the external electrodes 14a and 14b.
- the method of forming the unevenness of the external electrodes 14a and 14b of the electronic component 10e is the same as the method of forming the unevenness of the electronic component 10a, further detailed description is omitted.
- the manufacturing method of the electronic component 10e is the same as the manufacturing method of the electronic component 10a, description thereof is omitted.
- the electronic component 10e like the electronic component 10a, the number of manufacturing steps of the electronic component 10d can be reduced, and the electronic component 10e can be manufactured at low cost.
- the external electrodes 14a and 14b may be L-shaped or U-shaped like the electronic components 10b and 10c.
- the electronic components 10a to 10e incorporate the coil L as a circuit element.
- the circuit element is not limited to the coil L, and may be other elements such as a capacitor and a resistor.
- the exposed portions P1 and P2 do not have a uniform thickness and do not have to be arranged at equal intervals.
- the present invention is useful for electronic parts, and is particularly excellent in that it can be prevented from shifting from a normal mounting position and can be manufactured at low cost.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Ceramic Capacitors (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
(電子部品の構成)
以下に、本発明の第1の実施形態に係る電子部品について図面を参照しながら説明する。図1は、第1の実施形態に係る電子部品10aの外観斜視図である。図2は、第1の実施形態に係る電子部品10aの積層体12の分解斜視図である。以下、電子部品10aの積層方向をx軸方向と定義し、x軸方向から平面視したときに、電子部品10aの短辺に沿った方向をz軸方向と定義し、電子部品10aの長辺に沿った方向をy軸方向と定義する。x軸、y軸及びz軸は互いに直交している。
以下に、電子部品10aの製造方法について図面を参照しながら説明する。なお、以下では、複数の電子部品10aを同時に作成する際の電子部品10aの製造方法について説明する。
以上のような電子部品10aによれば、図3に示すように、外部電極14a,14bの表面には、凹凸が形成されている。これにより、外部電極14a,14bの表面積が大きくなっている。外部電極14a,14bの表面積が大きくなると、電子部品10aを回路基板に実装する際に、外部電極14a,14bに接触するはんだの面積が大きくなる。その結果、リフロー工程においてはんだが液状化した際に、はんだが表面張力によって外部電極14a,14bを保持する力が大きくなる。よって、リフロー工程において、電子部品10aが正常な実装位置からずれることが抑制される。
以下に、第1の変形例に係る電子部品10bについて図面を参照しながら説明する。図4は、第1の変形例に係る電子部品10bの外部電極14aの断面構造図である。電子部品10bの外観斜視図及び電子部品10bの積層体の分解斜視図については、図1及び図2を援用する。
(電子部品の構成)
以下に、本発明の第2の実施形態に係る電子部品について図面を参照しながら説明する。図7は、第2の実施形態に係る電子部品10eの外観斜視図である。図8は、第2の実施形態に係る電子部品10eの積層体12の分解斜視図である。以下、電子部品10eの積層方向をx軸方向と定義し、x軸方向から平面視したときに、電子部品10eの短辺に沿った方向をz軸方向と定義し、電子部品10eの長辺に沿った方向をy軸方向と定義する。x軸、y軸及びz軸は互いに直交している。
以上のような電子部品10eによれば、電子部品10aと同様に、リフロー工程において、電子部品10eが正常な実装位置からずれることが抑制される。
P1,P2 露出部
S10 下面
10a~10e 電子部品
12 積層体
14a,14b 外部電極
16a~16t,17 絶縁体層
18a~18s コイル導体
20a~20t,21,22a~22t,23 接続導体
Claims (4)
- 複数の絶縁体層が積層されてなる積層体と、
前記絶縁体層上に設けられている複数の内部導体であって、前記積層体の所定の面において前記絶縁体層間から露出している露出部を有している複数の内部導体と、
前記露出部を覆うように前記所定の面上にめっき工法により形成されている外部電極と、
を備えており、
前記複数の露出部は、積層方向において、均一な厚みを有していないか、又は、等間隔に並んでいないこと、
を特徴とする電子部品。 - 前記所定の面は、実装面であること、
を特徴とする請求項1に記載の電子部品。 - 前記所定の面は、積層方向に対して平行であること、
を特徴とする請求項1又は請求項2のいずれかに記載の電子部品。 - 前記外部電極の表面には、凹凸が形成されていること、
を特徴とする請求項1に記載の電子部品。
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CN201180028184.7A CN102934181B (zh) | 2010-06-11 | 2011-03-16 | 电子部件 |
JP2012519293A JP5459400B2 (ja) | 2010-06-11 | 2011-03-16 | 電子部品 |
US13/693,999 US8742881B2 (en) | 2010-06-11 | 2012-12-04 | Electronic component |
Applications Claiming Priority (2)
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JP2010133918 | 2010-06-11 | ||
JP2010-133918 | 2010-06-11 |
Related Child Applications (1)
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US13/693,999 Continuation US8742881B2 (en) | 2010-06-11 | 2012-12-04 | Electronic component |
Publications (1)
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WO2011155241A1 true WO2011155241A1 (ja) | 2011-12-15 |
Family
ID=45097856
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US (1) | US8742881B2 (ja) |
JP (1) | JP5459400B2 (ja) |
CN (1) | CN102934181B (ja) |
WO (1) | WO2011155241A1 (ja) |
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Also Published As
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CN102934181A (zh) | 2013-02-13 |
US20130093558A1 (en) | 2013-04-18 |
CN102934181B (zh) | 2015-12-16 |
JP5459400B2 (ja) | 2014-04-02 |
US8742881B2 (en) | 2014-06-03 |
JPWO2011155241A1 (ja) | 2013-08-01 |
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