WO2011058945A1 - 積層セラミック電子部品 - Google Patents
積層セラミック電子部品 Download PDFInfo
- Publication number
- WO2011058945A1 WO2011058945A1 PCT/JP2010/069825 JP2010069825W WO2011058945A1 WO 2011058945 A1 WO2011058945 A1 WO 2011058945A1 JP 2010069825 W JP2010069825 W JP 2010069825W WO 2011058945 A1 WO2011058945 A1 WO 2011058945A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- base material
- material layer
- electronic component
- ceramic electronic
- multilayer ceramic
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/08—Magnetic details
- H05K2201/083—Magnetic materials
- H05K2201/086—Magnetic materials for inductive purposes, e.g. printed inductor with ferrite core
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4626—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials
- H05K3/4629—Manufacturing multilayer circuits by laminating two or more circuit boards characterised by the insulating layers or materials laminating inorganic sheets comprising printed circuits, e.g. green ceramic sheets
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4688—Composite multilayer circuits, i.e. comprising insulating layers having different properties
Definitions
- the present invention relates to a multilayer ceramic electronic component.
- the present invention relates to a multilayer ceramic electronic component having a coil pattern inside a base material layer.
- Ferrite ceramic is often used for multilayer ceramic electronic components having an inductor function. In recent years, with the demand for miniaturization, ferrite ceramics with high magnetic permeability are used.
- Patent Document 1 discloses a multilayer ceramic electronic component as shown in FIG.
- This multilayer ceramic electronic component includes a base material layer 102 and surface layers 103 and 104 disposed on the main surface of the base material layer 102.
- a coil pattern 109 is disposed inside the base material layer 102.
- the coil pattern 109 is electrically connected to the external electrode 107 through the internal electrode 106 and the via electrode 108.
- the mounting components 110 and 111 are fixed with solder bumps 112 and solder 113.
- Patent Document 1 a high-frequency signal flows through the coil pattern 109. In that case, a magnetic field is generated in the base material layer 102 by the coil pattern 109. Due to the change in the magnetic field, an electromotive force is generated in the via electrode in the base material layer 102 due to electromagnetic induction, and noise is generated.
- the present invention has been made in view of such a problem, and an object thereof is to reduce noise generated in a via electrode in a base material layer.
- the multilayer ceramic electronic component according to the present invention includes a base material layer, a coil pattern which is disposed inside the base material layer and generates a magnetic field in the base material layer, and at least a part thereof is inside the base material layer. And at least a part of a portion in contact with the base material layer around the via electrode is a low magnetic layer having a magnetic permeability lower than the magnetic permeability of the base material layer. It is characterized by being covered.
- the base material layer is made of a ferrite ceramic.
- the coil pattern can be miniaturized.
- the low magnetic layer preferably has a magnetic permeability of 1 to 30.
- the magnetic field change of the via electrode can be effectively suppressed.
- the multilayer body further has a surface layer disposed on at least one main surface of the base material layer.
- the magnetic field change of the internal electrode arranged in the vicinity of the main surface of the laminate can be suppressed.
- the multilayer ceramic electronic component includes an internal electrode disposed inside the base material layer and an external electrode disposed on the main surface of the multilayer body, and the via electrode is the internal electrode. And the external electrode are preferably electrically connected.
- the magnetic field change of the via electrode connecting the internal electrode and the external electrode can be suppressed.
- the multilayer ceramic electronic component includes an external electrode disposed on the main surface of the multilayer body, and the via electrode is formed so as to be electrically connected to the coil pattern. .
- the magnetic field change of the via electrode connected to the coil pattern can be suppressed.
- the via electrode is formed so as to penetrate the base material layer perpendicularly to the main surface of the base material layer.
- the magnetic field change of the via electrode penetrating the base material layer can be suppressed.
- the magnetic field change in the via electrode can be suppressed by the low magnetic layer around the via electrode. Therefore, noise generated in the via electrode in the base material layer due to the magnetic field change can be reduced.
- FIG. 1 is a cross-sectional view showing a multilayer ceramic electronic component of the present invention.
- This multilayer ceramic electronic component constitutes a DC-DC converter, for example.
- the multilayer ceramic electronic component includes a multilayer body 5 having a base material layer 2, surface layers 3 and 4, internal electrodes 6 c and 6 d, via electrodes 8 a, 8 b, 8 c, 8 d and 8 e, and a coil pattern 9. I have. External electrodes 7 a, 7 b, 7 c, 7 d, and 7 e are disposed on the main surface of the stacked body 5.
- the surface layers 3 and 4 are disposed on the main surface of the base material layer 2.
- the surface layers 3 and 4 serve to prevent the internal electrode 6d and the via electrodes 8a, 8b, 8c, 8d, and 8e in the surface layers 3 and 4 from being affected by the magnetic field of the coil pattern 9.
- Mounting parts 10 and 11 are mounted on the main surface of the surface layer 3.
- the mounting component 10 is an IC chip, for example, and is electrically connected to the external electrode 7e disposed on the main surface of the surface layer 3 via the solder bumps 12.
- the electronic component 11 is, for example, a chip capacitor, and is electrically connected to the external electrode 7 d disposed on the main surface of the surface layer 3 via the solder 13.
- the external electrodes 7a, 7b, 7c arranged on the main surface of the surface layer 4 are used as terminal electrodes when a multilayer ceramic electronic component is mounted on a circuit board, for example.
- the coil pattern 9 is disposed inside the base material layer 2 and generates a magnetic field in the base material layer 2.
- the via electrodes 8a, 8b, 8c, 8d, and 8e are arranged perpendicular to the main surface of the multilayer ceramic electronic component.
- the via electrodes 8a, 8b, 8c, 8d, and 8e are disposed inside the base material layer 2 and the surface layers 3 and 4.
- the present invention can be applied to the via electrodes 8a, 8b, 8c, and 8d at least partially disposed inside the base material layer 2 as described below.
- the via electrode 8 a is formed so as to penetrate the base material layer 2 perpendicular to the main surface of the base material layer 2.
- the via electrode 8b is formed so as to electrically connect the coil pattern 9 and the external electrode 7b.
- the via electrode 8c is formed so as to electrically connect the internal electrode 6c and the external electrode 7c.
- the via electrode 8d is formed so as to electrically connect the coil pattern 9 and the internal electrode 6d.
- the low magnetic layers 14a, 14b, 14c having a permeability lower than the permeability of the base material layer 2 is at least part of the portions in contact with the base material layer 2 around the via electrodes 8a, 8b, 8c, 8d. , 14d, respectively.
- the low magnetic layers 14a, 14b, 14c, and 14d may cover at least part of the periphery of the via electrodes 8a, 8b, 8c, and 8d. Further, when the entire surface around the via electrodes 8a, 8b, 8c, and 8d is covered, the magnetic field shielding effect becomes more remarkable.
- the diameter of the via electrodes 8a, 8b, 8c and 8d is preferably 100 ⁇ m to 400 ⁇ m.
- the via electrodes 8a, 8b, 8c and 8d and the low magnetic layers 14a, 14b, 14c and 14d are concentric, the low magnetic layers 14a, 14b, 14c and 14d are formed from the outer periphery of the via electrodes 8a, 8b, 8c and 8d. It is preferable that the distance to the outer periphery of the low magnetic layers 14a, 14b, 14c and 14d is 40 to 100 ⁇ m.
- the base material layer 2 is comprised with a ferrite ceramic.
- the surface layers 3 and 4 and the low magnetic layers 14a, 14b, 14c and 14d are preferably ferrite ceramics having the same composition. In such a case, since a common material can be used, the manufacturing cost can be reduced. “The same composition” includes the same type and ratio of the main component elements but different types of additives. Moreover, it is preferable that the base material layer 2, the surface layers 3 and 4, and the low magnetic layers 14a, 14b, 14c, and 14d are ferrite ceramics having the same composition system. In such a case, the strength of the fired laminate is improved.
- the “same composition system” includes those having the same type of main component elements but having a slightly different ratio.
- the magnetic permeability of the base material layer 2 is preferably 70 to 300 at 1 MHz.
- the magnetic permeability of the surface layers 3 and 4 and the low magnetic layers 14a, 14b, 14c and 14d is preferably 1 to 30 at 1 MHz.
- the ferrite ceramic is preferably spinel type ferrite (MFeO 4 : M is a divalent metal ion) or garnet type ferrite (R 3 Fe 5 O 12 : R is a trivalent metal ion).
- the base material layer 2 is made of, for example, a Fe—Ni—Zn—Cu ferrite ceramic.
- the base material has a permeability of 300 at 1 MHz. A layer can be obtained.
- the surface layers 3 and 4 and the low magnetic layers 14a, 14b, 14c, and 14d are made of, for example, an Fe—Zn—Cu ferrite ceramic.
- an Fe—Zn—Cu ferrite ceramic In this case, if a mixture of ferric oxide (Fe 2 O 3 ) and zinc oxide (ZnO) at a predetermined ratio different from the above is used, the low magnetic property having a magnetic permeability of 1.0 at 1 MHz. A layer or a surface layer can be obtained.
- Fe—Ni—Zn—Cu ferrite ceramics are used, but Fe—Mn—Zn ferrites and Fe—Ni—Zn ferrite ceramics may be used. All of these crystal structures have a spinel crystal structure. A ferrite ceramic having another crystal structure such as a garnet type may be used.
- M is a divalent metal ion
- nickel zinc ferrite: (Ni 1-X Zn X ) Fe 2 O 4 manganese zinc ferrite (Mn 1-X Zn X ) Fe 2 O 4
- nickel ferrite: NiFe 2 O 4 manganese ferrite: MnFe 2 O 4
- zinc ferrite: ZnFe 2 O 4 copper ferrite: CuFe 2 O 4
- magnesium ferrite: MgFe 2 O 4 lithium ferrite: (Li 0.5 Fe 0.5 ) Fe 2 O 4 , gamma iron oxide ( ⁇ -Fe 2 O 3 ): Fe 2/3 ⁇ 1/3 Fe 2 O 4 (“ ⁇ ” is a vacancy And magnetite (iron ferrite): Fe 3 O 4 and the like.
- Examples of garnet-type ferrite (R 3 Fe 5 O 12 : R is a trivalent metal ion) include, for example, YIG (yttrium iron garnet): Y 3 Fe 5 O 12 , CVG (calcium vanadium iron garnet): Ca 3 Fe 3.5 V 1.5 O 12 , gadolinium iron garnet: Gd 3 Fe 5 O 12 and the like.
- FIG. 2 is a schematic diagram showing how the magnetic field is shielded.
- FIG. 2 is a view of the via electrode 8, the low magnetic layer 14, the magnetic field source 15, and the magnetic force lines 16 disposed in the base material layer as viewed from above the multilayer ceramic electronic component.
- a low magnetic layer 14 is disposed around the via electrode 8.
- a magnetic field source 15 that generates a magnetic field is assumed.
- the coil pattern of FIG. 1 is assumed.
- Magnetic field lines 16 are generated around the magnetic field source 15.
- the low magnetic layer 14 having a low magnetic permeability is less likely to be polarized than the base layer having a high magnetic permeability, and the magnetic field lines 16 are difficult to pass through. For this reason, the magnetic force lines 16 are less likely to enter the low magnetic layer 14. Therefore, it is difficult for magnetic lines of force to enter the via electrode 8, and a change in the magnetic field in the via electrode 8 can be suppressed.
- the magnetic field source not only a coil pattern but also a via electrode can be a magnetic field source. That is, when a current flows through the via electrode, a magnetic field is generated around the via electrode by the current. The magnetic field may affect other via electrodes and generate noise. The present invention is also effective against a magnetic field caused by such a via electrode.
- the low magnetic layer around the via electrode which is the configuration of the present invention, is manufactured as shown in FIG.
- a specific ceramic green sheet 21 is prepared.
- This ceramic green sheet is obtained by adding a binder, a plasticizer, a wetting agent, a dispersing agent, etc. to the prepared ferrite raw material powder to form a slurry, which is then formed into a sheet shape.
- the through-hole 22 is formed in the ceramic green sheet 21, as shown in FIG.3 (B).
- the through hole 22 can be formed by a laser or the like.
- the low magnetic layer 14 is formed in the through hole 22.
- the low magnetic layer 14 is made into a paste by adding a binder, a plasticizer, or the like to the prepared ferrite raw material powder and filling the through holes 22. Then, as shown in FIG. 3D, the through hole 22 is formed again in the low magnetic layer 14. Then, as shown in FIG. 3E, the via electrode 8 is formed by filling the through hole 22 with a conductive paste.
- the positional relationship between the low magnetic layer 14 and the via electrode 8 can be adjusted by adjusting the size and position of the through hole 22. For example, the positional relationship may be such that the low magnetic layer 14 covers a part of the periphery of the via electrode 8.
- an electrode pattern to be an internal electrode, an external electrode, and a coil pattern is formed on a specific ceramic green sheet.
- the electrode pattern can be formed, for example, by printing a conductive paste.
- each of the base material layer 2 and the surface layers 3 and 4 a predetermined number of ceramic green sheets are laminated in a predetermined number and fired after pressure bonding.
- the external electrode is plated. For example, a nickel plating film and a gold plating film are sequentially formed by electroless plating. Then, a mounting component is mounted on the external electrode.
- the via electrode not only a circular cross section but also an elliptical shape, a square shape, and a rectangular shape can be formed.
- the cross-sectional shape of the low magnetic layer 14 may be a square
- the cross-sectional shape of the via electrode 8 may be a circle.
- a plurality of multilayer ceramic electronic components may be formed in an aggregated state.
- dividing grooves are formed before firing. And it can divide
- the firing step is performed in the state of individual multilayer ceramic electronic components.
- electrolytic plating using a barrel can be used.
- a plurality of multilayer ceramic electronic components may be formed in an aggregated state, and may be divided by forming divided grooves after firing.
- the multilayer ceramic electronic component of the present invention is not limited to this content, and can be appropriately changed within a range not impairing the gist of the invention.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Abstract
Description
2 基材層
3、4 表面層
5 積層体
6c、6d 内部電極
7a、7b、7c、7d、7e 表面電極
8、8a、8b、8c、8d、8e ビア電極
9 コイルパターン
10、11 実装部品
12 はんだバンプ
13 はんだ
14、14a、14b、14c、14d 低磁性層
15 磁界源
16 磁力線
21 セラミックグリーンシート
22 貫通孔
102 基材層
103、104 表面層
106 内部電極
107 表面電極
108 ビア電極
109 コイルパターン
110、111 実装部品
112 はんだバンプ
113 はんだ
Claims (7)
- 基材層と、前記基材層の内部に配置され、前記基材層内に磁界を生じさせるコイルパターンと、少なくとも一部が前記基材層の内部に配置されるビア電極と、を有する積層体を備え、
前記ビア電極の周囲の前記基材層と接する部分の少なくとも一部が、前記基材層の透磁率よりも低い透磁率の低磁性層で覆われている、積層セラミック電子部品。 - 前記基材層はフェライトセラミックで構成される、請求項1に記載の積層セラミック電子部品。
- 前記低磁性層の透磁率が1~30である、請求項1または2に記載の積層セラミック電子部品。
- 前記積層体は前記基材層の少なくとも一方の主面上に配置される表面層をさらに有する、請求項1~3のいずれか1項に記載の積層セラミック電子部品。
- 前記基材層の内部に配置される内部電極と、前記積層体の主面上に配置される外部電極とを備え、前記ビア電極は前記内部電極と前記外部電極とを電気的に接続するように形成されている、請求項1~4のいずれか1項に記載の積層セラミック電子部品。
- 前記積層体の主面上に配置される外部電極を備え、前記ビア電極は前記コイルパターンと前記外部電極とを電気的に接続するように形成されている、請求項1~4のいずれか1項に記載の積層セラミック電子部品。
- 前記ビア電極は、前記基材層の主面と垂直に前記基材層を貫通するように形成されている、請求項1~4のいずれか1項に記載の積層セラミック電子部品。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN2010800504893A CN102598165A (zh) | 2009-11-11 | 2010-11-08 | 层叠陶瓷电子部件 |
JP2011540495A JPWO2011058945A1 (ja) | 2009-11-11 | 2010-11-08 | 積層セラミック電子部品 |
Applications Claiming Priority (2)
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JP2009257900 | 2009-11-11 | ||
JP2009-257900 | 2009-11-11 |
Publications (1)
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WO2011058945A1 true WO2011058945A1 (ja) | 2011-05-19 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/069825 WO2011058945A1 (ja) | 2009-11-11 | 2010-11-08 | 積層セラミック電子部品 |
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JP (1) | JPWO2011058945A1 (ja) |
CN (1) | CN102598165A (ja) |
WO (1) | WO2011058945A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016025152A (ja) * | 2014-07-17 | 2016-02-08 | 日立金属株式会社 | 積層部品及びその製造方法 |
JP2017216401A (ja) * | 2016-06-01 | 2017-12-07 | 株式会社村田製作所 | 電子部品 |
WO2018079142A1 (ja) * | 2016-10-24 | 2018-05-03 | 株式会社村田製作所 | コイル内蔵多層基板、電源モジュール |
JP2019009320A (ja) * | 2017-06-26 | 2019-01-17 | 新光電気工業株式会社 | 配線基板 |
WO2024024069A1 (ja) * | 2022-07-29 | 2024-02-01 | 日本碍子株式会社 | インターポーザおよびインターポーザの製造方法 |
WO2024024027A1 (ja) * | 2022-07-28 | 2024-02-01 | 日本碍子株式会社 | コア基板およびインターポーザ |
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JPH05315139A (ja) * | 1992-05-07 | 1993-11-26 | Murata Mfg Co Ltd | Lc複合電子部品 |
JPH06112047A (ja) * | 1992-09-26 | 1994-04-22 | Taiyo Yuden Co Ltd | 積層セラミックインダクタとその製造方法 |
JPH06283882A (ja) * | 1993-03-26 | 1994-10-07 | Cmk Corp | 磁界・電磁波シールド層を有するプリント配線板 とその製造方法 |
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WO2007148556A1 (ja) * | 2006-06-23 | 2007-12-27 | Murata Manufacturing Co., Ltd. | 積層型セラミック電子部品 |
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2010
- 2010-11-08 WO PCT/JP2010/069825 patent/WO2011058945A1/ja active Application Filing
- 2010-11-08 JP JP2011540495A patent/JPWO2011058945A1/ja active Pending
- 2010-11-08 CN CN2010800504893A patent/CN102598165A/zh active Pending
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JPH0267609U (ja) * | 1988-11-08 | 1990-05-22 | ||
JPH05315139A (ja) * | 1992-05-07 | 1993-11-26 | Murata Mfg Co Ltd | Lc複合電子部品 |
JPH06112047A (ja) * | 1992-09-26 | 1994-04-22 | Taiyo Yuden Co Ltd | 積層セラミックインダクタとその製造方法 |
JPH06283882A (ja) * | 1993-03-26 | 1994-10-07 | Cmk Corp | 磁界・電磁波シールド層を有するプリント配線板 とその製造方法 |
JPH10215044A (ja) * | 1997-01-28 | 1998-08-11 | Kyocera Corp | 配線基板及びその製造方法 |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016025152A (ja) * | 2014-07-17 | 2016-02-08 | 日立金属株式会社 | 積層部品及びその製造方法 |
JP2017216401A (ja) * | 2016-06-01 | 2017-12-07 | 株式会社村田製作所 | 電子部品 |
US10497510B2 (en) | 2016-06-01 | 2019-12-03 | Murata Manufacturing Co., Ltd. | Electronic component |
WO2018079142A1 (ja) * | 2016-10-24 | 2018-05-03 | 株式会社村田製作所 | コイル内蔵多層基板、電源モジュール |
JPWO2018079142A1 (ja) * | 2016-10-24 | 2019-04-11 | 株式会社村田製作所 | コイル内蔵多層基板、電源モジュール |
US11024571B2 (en) | 2016-10-24 | 2021-06-01 | Murata Manufacturing Co., Ltd. | Coil built-in multilayer substrate and power supply module |
JP2019009320A (ja) * | 2017-06-26 | 2019-01-17 | 新光電気工業株式会社 | 配線基板 |
WO2024024027A1 (ja) * | 2022-07-28 | 2024-02-01 | 日本碍子株式会社 | コア基板およびインターポーザ |
WO2024024069A1 (ja) * | 2022-07-29 | 2024-02-01 | 日本碍子株式会社 | インターポーザおよびインターポーザの製造方法 |
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JPWO2011058945A1 (ja) | 2013-03-28 |
CN102598165A (zh) | 2012-07-18 |
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