WO2008018203A1 - composant de bobine multicouche ET SON PROCÉDÉ DE FABRICATION - Google Patents
composant de bobine multicouche ET SON PROCÉDÉ DE FABRICATION Download PDFInfo
- Publication number
- WO2008018203A1 WO2008018203A1 PCT/JP2007/057874 JP2007057874W WO2008018203A1 WO 2008018203 A1 WO2008018203 A1 WO 2008018203A1 JP 2007057874 W JP2007057874 W JP 2007057874W WO 2008018203 A1 WO2008018203 A1 WO 2008018203A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil component
- layer
- ceramic sheet
- magnetic
- low
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title description 8
- 230000035699 permeability Effects 0.000 claims abstract description 70
- 239000004020 conductor Substances 0.000 claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 abstract description 140
- 230000032798 delamination Effects 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 238000003825 pressing Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000007606 doctor blade method Methods 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
Classifications
-
- 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
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- 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
- H01F41/046—Printed circuit coils structurally combined with ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F2017/048—Fixed inductances of the signal type with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
Definitions
- the present invention relates to a laminated coil component, more specifically, a magnetic layer on which a coil conductor is formed, and
- the present invention also relates to a laminated coil component including a coil formed by laminating a low magnetic permeability layer having a magnetic permeability lower than that of a magnetic layer and electrically connecting the coil conductors, and a manufacturing method thereof.
- Multilayer coil components include a closed magnetic circuit type multilayer coil component and an open magnetic circuit type multilayer coil component.
- a closed magnetic circuit type multilayer coil component has a merit that a high inductance can be obtained because a magnetic path having a large magnetic permeability and a small magnetic resistance can be formed.
- a closed magnetic circuit type multilayer coil component generates a large magnetic flux density, so that even if the DC superimposed current is small, magnetic saturation occurs and the inductance decreases easily due to magnetic saturation. For this reason, the closed magnetic circuit type multilayer coil component has a drawback that the DC superimposition characteristic is poor.
- a laminated coil component having a coil conductor pattern that is sequentially connected in the laminating direction while circling in a magnetic body is used.
- the insulating layer having a low magnetic permeability is formed on a part of the inside or outside of the coil conductor pattern.
- the occurrence of magnetic saturation due to an excessive increase in magnetic flux density is suppressed. This suppresses the decrease in inductance due to magnetic saturation and improves the DC superposition characteristics.
- the insulating layer is not provided with force on a part rather than the entire surface, a relatively high magnetic permeability can be obtained, and a high
- Patent Document 1 Japanese Utility Model Publication No. 63-87809
- an object of the present invention is to provide an open magnetic circuit type multilayer coil component in which cracks between layers having different magnetic permeability are less likely to occur and a method for manufacturing the same.
- a magnetic layer on which a coil conductor is formed and a low magnetic permeability layer having a lower magnetic permeability than the magnetic layer are laminated, and the coil conductors are electrically connected to each other.
- the laminated coil component including the constructed coil the low magnetic permeability layer is sandwiched between the magnetic layers, and a hole or a recess is formed in a main surface of the low magnetic permeability layer.
- the magnetic layer adjacent to the low magnetic permeability layer is in contact with the inner peripheral surface of the hole or recess.
- the magnetic layer adjacent to the low magnetic permeability layer is in contact with the inner peripheral surface of the hole or the recess, an anchor effect occurs between the magnetic layer and the low magnetic permeability layer. . As a result, it is possible to suppress the occurrence of delamination between the magnetic layer and the low permeability layer.
- a coil conductor may be formed in the low magnetic permeability layer.
- the side surfaces constituting the inner peripheral surface of the hole or the recess are continuously connected. If the side surfaces constituting the recess and the hole are interrupted, the magnetic layer and the low permeability layer are not in contact with each other at the interrupted portion. As a result, the anchor effect acting between the magnetic layer and the low permeability layer is reduced. Therefore, in order to obtain a larger anchor effect, it is preferable that the side surfaces constituting the inner peripheral surface of the hole or the recess are continuously connected.
- the hole or the recess is formed in a region outside the coil when viewed in plan from the lamination direction. Moreover, it is preferable that the hole or the recess is formed in the vicinity of the outer periphery of the low magnetic permeability layer. In the hole or recess, the magnetic resistance is lower than that of the low permeability layer around the hole or recess. Get smaller.
- the low magnetic permeability layer has a rectangular shape, and the hole or the recess is formed in the vicinity of a long side of the low magnetic permeability layer.
- Coil center force The distance from the long side of the low permeability layer to the long side of the low permeability layer is shorter than the distance from the center of the coil to the short side of the low permeability layer. Therefore, the magnetic flux generated in the coil is more likely to leak from the long side than from the short side. Therefore, the magnetic resistance in the vicinity of the long side can be reduced by forming a hole or a recess in the vicinity of the long side of the low magnetic permeability layer. Therefore, the leakage of magnetic flux can be effectively reduced, and the inductance of the laminated coil component can be improved.
- the low magnetic permeability layer has a rectangular shape, and is a laminated body configured by laminating the magnetic layer and the low magnetic permeability layer.
- An external electrode that is electrically connected to the coil, and the hole or the recess is formed in the vicinity of either the long side or the short side of the low magnetic permeability layer, and the external electrode
- the electrode is preferably formed on a side surface of the laminate including a side of the low magnetic permeability layer different from a side of the low magnetic permeability layer in which the hole or the recess is formed.
- the hole or the recess is preferably formed in the vicinity of the long side of the low magnetic permeability layer, and the external electrode is preferably formed on the side surface of the laminate including the short side of the low magnetic permeability layer.
- the low magnetic permeability layer may be a non-magnetic material.
- the multilayer coil component according to the present invention can be manufactured by the following manufacturing method.
- a laminated coil component having a laminated body force including a coil, a step of forming a magnetic layer and a low permeability layer having a lower permeability than the magnetic layer, and the magnetic layer Forming a coil conductor on the main surface of the low permeability layer Forming a hole or recess in the surface and laminating the magnetic material layer so as to sandwich the low permeability layer to form a laminate in which the magnetic material layer is in contact with the inner peripheral surface of the hole or recess.
- the laminated coil component can be preferably manufactured.
- FIG. 1 is an exploded perspective view of a laminated coil component according to an embodiment of the present invention.
- FIG. 2 is an external perspective view of the multilayer coil component.
- FIG. 3 is a view showing a cross-sectional structure of the laminated coil component.
- FIG. 4 is an exploded perspective view according to a first modification of the multilayer coil component.
- FIG. 5 is a view showing a cross-sectional structure according to a first modification of the multilayer coil component.
- FIG. 6 is an exploded perspective view according to a second modification of the multilayer coil component.
- FIG. 7 is a view showing a cross-sectional structure according to a third modification of the multilayer coil component.
- FIG. 8 is a view showing a cross-sectional structure according to a fourth modification of the multilayer coil component.
- FIG. 9 is a view showing a cross-sectional structure according to a fifth modification of the multilayer coil component.
- FIG. 10 is a view showing a cross-sectional structure according to a sixth modification of the multilayer coil component.
- FIG. 11 is an explanatory diagram for explaining an effect of a modified example of the laminated coil component.
- FIG. 1 is an exploded perspective view of the laminated coil component 1.
- FIG. 2 is an external perspective view of the laminated coil component 1.
- FIG. 3 is a view showing a cross-sectional structure of the laminated coil component 1.
- the laminated coil component 1 is composed of a first ceramic sheet 2, a second ceramic sheet 3, a third ceramic sheet 4, and the like.
- the first ceramic sheet 2 is made of a magnetic material, and a coil conductor pattern 5 and a via-hole conductor 10 are formed on the main surface thereof.
- the second ceramic sheet 3 is made of a magnetic material like the first ceramic sheet 2, and the coil conductor pattern 5 is not formed on its main surface.
- the third ceramic sheet 4 is made of a low magnetic permeability material or non-magnetic material (having a magnetic permeability of 1) having a lower magnetic permeability than the first ceramic sheet 2, and the main surface thereof has a coil conductor. Pattern 5, via-hole conductor 10 and hole 7 are formed.
- the first ceramic sheet 2 and the second ceramic sheet 3 are manufactured as follows. Ferric oxide (Fe 2 O), zinc oxide (ZnO), nickel oxide (NiO), copper oxide (CuO)
- Each material weighed at a fixed ratio is put into a ball mill as a raw material and wet blended.
- the obtained mixture is dried and pulverized, and the obtained powder is calcined at 750 ° C. for 1 hour.
- the obtained calcined powder is wet pulverized in a ball mill and then dried and pulverized to obtain ferrite ceramic powder.
- a binder, a plasticizer, a wetting material, and a dispersing agent are added to the ferrite ceramic powder, mixed by a ball mill, and then defoamed under reduced pressure.
- the obtained ceramic slurry is formed into a sheet shape using a doctor blade method and dried to produce a raw first ceramic sheet 2 and a raw second ceramic sheet 3 having a desired film thickness.
- the third ceramic sheet 4 is manufactured as follows. Ferric oxide (Fe 2 O 3), acid
- a binder, a plasticizer, a wetting material, and a dispersing agent are added to the nonmagnetic ceramic powder. Mixing is performed with a rumill, and then defoaming is performed under reduced pressure. The obtained ceramic slurry is formed into a sheet using the doctor-blade method and dried to produce a raw third ceramic sheet 4 having a desired film thickness.
- the film thickness of the third ceramic sheet 4 is, for example, about 20 m.
- via-hole conductors 10 for connecting the coil conductor patterns 5 of adjacent layers are formed.
- the via-hole conductor 10 is formed with a through hole in the first ceramic sheet 2 and the third ceramic sheet 4 using a laser beam or the like, and Ag, Pd, Cu, Au, or an alloy thereof is formed in the through hole. It is formed by filling a conductive paste by a method such as printing.
- a coil conductor pattern 5 is formed by applying a conductive paste by a method such as screen printing or photolithography.
- These conductor patterns 5 are made of Ag, Pd, Cu, Au, and alloys thereof.
- holes 7 are formed in the main surface of the third ceramic sheet 4 so as to penetrate the main surface of the third ceramic sheet 4 in the stacking direction.
- the holes 7 are preferably formed in a region outside the coil conductor pattern 5 when viewed in plan from the stacking direction. Further, the holes 7 are more preferably formed in the outer region of the coil conductor pattern 5, particularly in the vicinity of the outer periphery of the third ceramic sheet 4. In the present embodiment, the holes 7 are formed in the vicinity of the short side of the third ceramic sheet 4.
- the holes 7 may be formed by applying a pressing force to the third ceramic sheet 4 using a mold in which convex portions are formed, or the third ceramic sheet 4 may be formed by a laser. May be formed by punching.
- the plurality of coil conductor patterns 5 are electrically connected in series via via-hole conductors 10 formed in the first ceramic sheet 2 and the third ceramic sheet 4 to form a spiral coil.
- L is formed.
- the coil axis of the coil L is parallel to the stacking direction of the first ceramic sheet 2, the second ceramic sheet 3 and the third ceramic sheet 4.
- the lead portions 6a and 6b of the coil L are respectively the first ceramic sheet disposed at the left side and the lowermost layer of the first ceramic sheet 2 disposed in the uppermost layer among the plurality of first ceramic sheets 2. The right side of 2 is exposed.
- the first ceramic sheet 2 is laminated above and below the third ceramic sheet 4 so as to sandwich the third ceramic sheet 4, and the second ceramic sheet 3 is positioned above and below the third ceramic sheet 4.
- the third ceramic sheet 4 is laminated so as to be positioned approximately at the center in the length direction of the coil L.
- the first ceramic sheet 2, the second ceramic sheet 3 and the third ceramic sheet 4 are pressed from above and below.
- the first ceramic sheet 2 adjacent to the third ceramic sheet 4 enters the partial force holes 7.
- the first ceramic sheet 2 adjacent to the third ceramic sheet 4 comes into contact with the inner peripheral surface constituting the hole 7. Thereby, an unbaked laminated body is formed.
- this unfired laminated body is integrally fired to obtain a laminated body 20 having a rectangular parallelepiped shape as shown in FIG.
- Input / output external electrodes 21 and 22 are formed on the surface of the laminate 20.
- the input / output external electrodes 21 and 22 are preferably formed on the side surfaces of the rectangular parallelepiped located on the short side of the third ceramic sheet 4. Therefore, in the present embodiment, the input / output external electrodes 21 and 22 are formed on the left and right end faces of the multilayer body 20 as shown in FIG.
- the coil lead portions 6a and 6b are electrically connected to the input / output external electrodes 21 and 22, respectively.
- the laminated coil component 1 obtained in this way includes a coil part 31 including a coil L formed by electrically connecting a plurality of coil conductor patterns 5, and a coil part. And outer layer portions 32 and 33 stacked in upper and lower regions of 31. Then, the third ceramic sheet 4 is arranged at a substantially central position of the coil portion 31 in the stacking direction of the multilayer coil component 1. Therefore, the magnetic flux ⁇ generated by the coil L passes through the open magnetic path formed by the third ceramic sheet 4.
- the first ceramic sheet 2 adjacent to the top and bottom of the third ceramic sheet 4 is in contact with the inner peripheral surface of the hole 7.
- an anchor effect is generated between the first ceramic sheet 2 and the third ceramic sheet 4, so that cracks and delamination are generated between the first ceramic sheet 2 and the third ceramic sheet 4. It is suppressed.
- the holes 7 are formed in the vicinity of the short side of the third ceramic sheet 4.
- the laminated ceramic sheet warps when the laminate 20 is fired, so that the crack is not delaminated. Chillon is likely to occur. Therefore, as in the laminated coil component 1, air holes 7 are formed in the vicinity of the outer periphery of the third ceramic sheet 4, and the bonding force between the first ceramic sheet 2 and the third ceramic sheet 4 in the vicinity of the outer periphery is formed. Therefore, the generation of delamination can be effectively suppressed.
- the inductance of the open magnetic circuit type laminated coil component can be easily increased. The reason will be described below.
- the holes 7 are formed in the vicinity of the short side of the third ceramic sheet 4.
- the coil L has a larger capacity than the holes 7 formed inside the coil L.
- the outer magnetic path becomes closer to the closed magnetic path.
- the third ceramic sheet 4 In the conventional open magnetic circuit type laminated coil component, a material having a high magnetic permeability (ferrite) is used for the third ceramic sheet 4 in order to increase the inductance.
- ferrite magnetic permeability
- the third ceramic sheet 4 needs to be formed as thin as possible in order to achieve both an increase in inductance and a reduction in power loss at high frequencies.
- the third ceramic sheet 4 thin as described above. Therefore, in the laminated coil component 1, the third ceramic using a material having a relatively low permeability is used.
- the cover sheet 4 is formed to be relatively thick, and part of the first ceramic sheet 2 is inserted into the holes 7 formed in the third ceramic sheet 4. As described above, it is easier to form the holes 7 in the third ceramic sheet 4 to allow a part of the first ceramic sheet 2 to enter than to form the third ceramic sheet 4 thin. This makes it possible to achieve both a reduction in power loss at high frequencies and an increase in inductance by a relatively easy method.
- the laminated coil component 1 it is possible to control the DC superposition characteristics. If the size and number of holes 7 in the laminated coil component 1 change, the DC superposition characteristics also change. Specifically, if the area of the hole 7 is increased, the magnetic resistance of the magnetic path is reduced, so that magnetic saturation is likely to occur and the DC superposition characteristics are deteriorated. On the other hand, if the area of the hole 7 is reduced, the magnetic resistance of the magnetic path is increased, so that magnetic saturation occurs and the direct current superposition characteristics are improved. Therefore, in the laminated coil component 1, the DC superimposition characteristics can be controlled by adjusting the area of the holes 7.
- FIG. 4 is an exploded perspective view of the laminated coil component 41.
- FIG. 5 is a view showing a cross-sectional structure of the laminated coil component 41.
- the main surface of the third ceramic sheet 4 has a concave portion 47 in which the main surface of the third ceramic sheet 4 is recessed in the stacking direction. It is formed.
- the recess 47 is formed in the vicinity of the short side of the third ceramic sheet 4 in the same manner as the hole 7.
- the concave portion 47 is formed by applying a pressing force to the third ceramic sheet 4 using a mold in which the convex portion is formed.
- holes 7 and recesses 47 may be formed in the vicinity of the long side not in the vicinity of the short side of the third ceramic sheet 4.
- holes 7 are formed in the main surface of the third ceramic sheet 4 so as to penetrate the main surface of the third ceramic sheet 4 in the stacking direction. .
- the hole 7 of the multilayer coil component 51 is formed in the vicinity of the long side of the third ceramic sheet 4. According to the laminated coil component 51 as described above, since the holes 7 are formed in the vicinity of the long side of the third ceramic sheet 4, the open magnetic circuit type is more effectively produced than the laminated coil component 1. The inductance of the laminated coil component can be increased. The reason will be described below.
- the longer side is the center of the coil L than the short side of the third ceramic sheet 4.
- the distance of the force is close and the distance to the outside is long. Therefore, the magnetic flux that leaks the long side force of the third ceramic sheet 4 is more than the magnetic flux that leaks from the short side of the third ceramic sheet 4. Therefore, as shown in FIG. 6, by forming a hole 7 near the long side of the third ceramic sheet 4, a part of the first ceramic sheet 2 enters the hole 7.
- the magnetic resistance in the hole 7 becomes small.
- the magnetic flux leaking around the hole 7 is reduced, and the leakage of the magnetic flux to the outside of the multilayer coil component 51 is reduced. That is, the inductance of the laminated coil component 51 can be increased.
- the short side of the third ceramic sheet 4 is formed as shown in FIG.
- input / output external electrodes 21 and 22 are formed on the side surface of the laminate 20 including. That is, the side included in the side surface where the input / output external electrodes 21 and 22 are formed is preferably different from the side of the third ceramic sheet 4 where the hole 7 is formed.
- magnetic flux leakage is suppressed near the short side of the third ceramic sheet 4 by eddy currents generated at the input / output external electrodes 21 and 22, and holes are not formed near the long side of the third ceramic sheet 4.
- the magnetic flux leakage is suppressed by 7, and the magnetic flux leakage is efficiently suppressed near each side. As a result, the inductance of the laminated coil component 51 can be increased more effectively.
- the third ceramic sheet 4 may be formed by combining holes 7 and recesses 47.
- the third ceramic sheet 4 may be laminated not only by one sheet but also by a plurality of sheets. By stacking a plurality of third ceramic sheets 4, the DC superposition characteristics are improved. In this case, holes 7 may be formed only in one of the third ceramic sheets 4 as shown in FIG. Further, as shown in FIG. 9, the position of the recess 47 formed in the upper third ceramic sheet 4 and the position of the recess 47 formed in the lower third ceramic sheet 4 are in the horizontal direction. It may be off.
- the plurality of third ceramic sheets 4 may be spaced apart from each other by stacking the first ceramic sheets 2 therebetween.
- the shape of the recess 47 may be a groove shape connecting the front side surface and the back side surface in the vicinity of the short side of the third ceramic sheet 4.
- the side surface 68 constituting the inner peripheral surface of the hole 7 or the recess 47 may not be continuously connected.
- an end opening 69 such as the recess 47 is formed at the end of the third ceramic sheet 4.
- the first ceramic sheet 2 and the third ceramic sheet 4 do not come into contact with each other, so that a sufficient anchor effect can be obtained between the first ceramic sheet 2 and the third ceramic sheet 4. Can not.
- it is preferable that the side surfaces 68 constituting the inner peripheral surface of the recess 47 or the like are connected continuously.
- the third ceramic sheet 4 may be formed at a position other than the approximate center in the length direction of the coil L.
- the cross-sectional shapes of the holes 7 and the recesses 47 are assumed to be circular. These cross-sectional shapes are not limited to circular. Therefore, it may be rectangular.
- the first ceramic sheet 2 constitutes the inner peripheral surface of the hole 7 or the recess 47 at least to the extent that the partial force of the first ceramic sheet 2 enters the hole 7 or the recess 47. Just touching the side. Accordingly, the holes 7 or the recesses 47 are not necessarily filled with a part of the first ceramic sheet 2.
- holes 7 or the recesses 47 may be formed in both the vicinity of the long side and the vicinity of the short side of the third ceramic sheet 4.
- the present invention is useful for a laminated coil component and a method for manufacturing the same, and is particularly excellent in that delamination is less likely to occur between layers having different magnetic permeability.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007556446A JP4737199B2 (ja) | 2006-08-07 | 2007-04-10 | 積層コイル部品 |
US12/127,078 US20080218301A1 (en) | 2006-08-07 | 2008-05-27 | Multilayer coil component and method of manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006214862 | 2006-08-07 | ||
JP2006-214862 | 2006-08-07 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/127,078 Continuation US20080218301A1 (en) | 2006-08-07 | 2008-05-27 | Multilayer coil component and method of manufacturing the same |
Publications (1)
Publication Number | Publication Date |
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WO2008018203A1 true WO2008018203A1 (fr) | 2008-02-14 |
Family
ID=39032742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/057874 WO2008018203A1 (fr) | 2006-08-07 | 2007-04-10 | composant de bobine multicouche ET SON PROCÉDÉ DE FABRICATION |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080218301A1 (ja) |
JP (1) | JP4737199B2 (ja) |
CN (1) | CN101356599A (ja) |
WO (1) | WO2008018203A1 (ja) |
Cited By (11)
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WO2010061679A1 (ja) * | 2008-11-28 | 2010-06-03 | 株式会社村田製作所 | 電子部品 |
WO2010079804A1 (ja) * | 2009-01-08 | 2010-07-15 | 株式会社村田製作所 | 電子部品 |
WO2010087247A1 (ja) * | 2009-02-02 | 2010-08-05 | 株式会社村田製作所 | 積層インダクタ |
WO2010092861A1 (ja) * | 2009-02-13 | 2010-08-19 | 株式会社村田製作所 | 電子部品 |
JP2010278301A (ja) * | 2009-05-29 | 2010-12-09 | Tdk Corp | 積層型コモンモードフィルタ |
US20180122546A1 (en) * | 2016-10-28 | 2018-05-03 | Samsung Electro-Mechanics Co., Ltd. | Coil component |
KR20190039902A (ko) * | 2016-10-28 | 2019-04-16 | 삼성전기주식회사 | 코일 부품 |
KR20190082736A (ko) * | 2019-07-03 | 2019-07-10 | 삼성전기주식회사 | 코일 부품 |
KR20200038220A (ko) * | 2020-04-01 | 2020-04-10 | 삼성전기주식회사 | 코일 부품 |
WO2022172949A1 (ja) * | 2021-02-12 | 2022-08-18 | パナソニックIpマネジメント株式会社 | 電子部品及び電子部品の製造方法 |
US11424058B2 (en) * | 2017-09-26 | 2022-08-23 | Samsung Electro-Mechanics Co., Ltd. | Coil component |
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JP4952749B2 (ja) * | 2009-07-06 | 2012-06-13 | 株式会社村田製作所 | 積層インダクタ |
KR101332100B1 (ko) | 2011-12-28 | 2013-11-21 | 삼성전기주식회사 | 적층형 인덕터 |
WO2017018109A1 (ja) * | 2015-07-24 | 2017-02-02 | 株式会社村田製作所 | フレキシブルインダクタ |
JP6508227B2 (ja) * | 2017-01-20 | 2019-05-08 | 株式会社村田製作所 | フレキシブルインダクタ |
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KR101296694B1 (ko) | 2009-01-08 | 2013-08-19 | 가부시키가이샤 무라타 세이사쿠쇼 | 전자 부품 |
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Also Published As
Publication number | Publication date |
---|---|
JPWO2008018203A1 (ja) | 2009-12-24 |
JP4737199B2 (ja) | 2011-07-27 |
US20080218301A1 (en) | 2008-09-11 |
CN101356599A (zh) | 2009-01-28 |
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