WO2005060093A1 - 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
- WO2005060093A1 WO2005060093A1 PCT/JP2004/018397 JP2004018397W WO2005060093A1 WO 2005060093 A1 WO2005060093 A1 WO 2005060093A1 JP 2004018397 W JP2004018397 W JP 2004018397W WO 2005060093 A1 WO2005060093 A1 WO 2005060093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceramic
- coil conductor
- shaped coil
- strip
- laminate
- Prior art date
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 157
- 239000004020 conductor Substances 0.000 claims abstract description 93
- 239000011229 interlayer Substances 0.000 claims abstract description 40
- 239000010410 layer Substances 0.000 claims description 57
- 238000004804 winding Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0153—Electrical filters; Controlling thereof
- H03H7/0161—Bandpass filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
-
- 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
- H01F2017/0026—Multilayer LC-filter
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
Definitions
- the present invention relates to a multilayer ceramic electronic component, particularly to a multilayer ceramic electronic component such as a multilayer LC filter capable of efficiently suppressing high-frequency noise.
- FIG. 14 is a horizontal sectional view of the laminated LC filter 71.
- the laminated LC filter 71 is formed by stacking a plurality of insulating sheets provided with a coil conductor pattern 72 to form a laminate 75, and electrically connecting each coil conductor pattern 72 via an interlayer connection via hole provided in the insulating sheet. , Forming a spiral coil L2!
- the direction of stacking the insulating sheets is the direction indicated by the arrow K, and the coil axis of the coil L2 is parallel to the direction of stacking the insulating sheets. That is, the coil L2 is a horizontal laminated horizontal coil. Input / output external electrodes 76 and 77 are formed at both left and right ends of the multilayer body 75, and ground external electrodes 78 and 79 are formed at the center of the side surface. A coil L2 is electrically connected between the input / output external electrodes 76 and 77. Then, a filter is formed by the capacitance generated between the coil conductor pattern 72 and the external external electrodes 78 and 79 and the inductance of the coil L2 itself.
- the edge of the coil conductor pattern 72 faces the ground external electrodes 78 and 79, the multilayer LC filter 71 cannot form a large capacitance because the facing area between the two is small. Was.
- the laminated LC filter 81 includes an insulating sheet provided with a plurality of strip-shaped coil conductor patterns 82 on the same surface, an insulating sheet provided with a plurality of interlayer connection via holes 84, and The strip-shaped coil conductor pattern 83 is laminated on an insulating sheet provided on the same surface to form a laminate 85.
- Input / output external electrodes 86 and 87 are formed on both left and right ends of the multilayer body 85, and ground external electrodes 88 and 89 are formed in the center of the side surface.
- a coil L3 is electrically connected between the input / output external electrodes 86 and 87. Then, a filter is formed by the capacitance generated between the via hole 84 for interlayer connection and the ground external electrodes 88 and 89 and the inductance of the coil L3 itself.
- the laminated LC filter 81 has the via hole 84 for interlayer connection opposed to the ground external electrodes 88 and 89, it is possible to form a large capacitance with a small facing area between the two. Power.
- Patent Document 1 JP-A-9-293612
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-252117
- an object of the present invention is to provide a multilayer ceramic electronic component capable of obtaining a large capacitance.
- a multilayer ceramic electronic component includes a ceramic laminate formed by stacking a plurality of ceramic layers, a ceramic laminate inside, and a ceramic layer on a surface of the ceramic layer.
- a plurality of strip-shaped coil conductor patterns having pattern surfaces arranged in parallel to each other, a plurality of interlayer connection via holes having an axis parallel to the stacking direction of the ceramic layers inside the ceramic laminate, and a ceramic. It has ground external electrodes provided on the surface of the laminate and connects predetermined ends of a plurality of strip-shaped coil conductor patterns with a plurality of via holes for interlayer connection, and the coil axis is orthogonal to the stacking direction of the ceramic layers. And a via for interlayer connection on the surface of the ceramic laminate.
- the external electrode is provided on a portion facing the strip-shaped coil conductor pattern surface, avoiding the portion facing the hole.
- each of the strip-shaped coil conductor patterns faces the ground external electrode on the surface, so that the capacitance generated between them increases.
- the ground external electrode forms part of the coil! Since the capacitors are provided so as not to face the interlayer connection via holes, independent capacitances are formed between the strip-shaped coil conductor pattern and the ground external electrode.
- Each capacitance forms a plurality of resonance circuits together with the inductance of the strip-shaped coil conductor pattern, and the plurality of resonance circuits form a multi-stage filter.
- the multilayer ceramic electronic component according to the second invention has a ceramic laminate formed by stacking a plurality of ceramic layers, and a pattern surface is arranged inside the ceramic laminate so as to be parallel to a surface of the ceramic layer.
- a ground external electrode is provided, and predetermined ends of a plurality of strip-shaped coil conductor patterns are connected to each other by a plurality of interlayer connection via holes to form a coil whose coil axis is orthogonal to the stacking direction of the ceramic layers.
- a ground external electrode is provided on a portion of the surface of the ceramic laminate opposite to the surface of the strip-shaped coil conductor pattern, and a ceramic layer is provided.
- the strip-shaped coil conductor pattern is formed, and the ceramic layer between the curved surface and the surface facing the strip-shaped coil conductor pattern surface of the ceramic laminate also has a dielectric ceramic force. Is characterized in that the remaining ceramic layer also has a magnetic ceramic force.
- each of the strip-shaped coil conductor patterns faces the ground external electrode on the surface, the capacitance generated between them becomes large.
- the ceramic layer between the surface on which the strip-shaped coil conductor pattern is formed and the surface facing the strip-shaped coil conductor pattern surface of the ceramic laminate has a dielectric ceramic force. Therefore, a large capacitance is formed between the strip-shaped coil conductor pattern and the ground external electrode.
- a part of the coil is formed, and a magnetic material is provided between the via hole for interlayer connection and the ground external electrode. Since the Lamix is provided, the capacitance formed between them is small. Therefore, large and small capacitances are alternately and repeatedly generated between the coil and the ground external electrode.
- the small capacitance can be almost ignored, so that only the large capacitance forms a plurality of resonance circuits together with the inductance of the strip-shaped coil conductor pattern, and the plurality of resonance circuits constitute a multi-stage filter. Looks like.
- a multilayer ceramic electronic component includes a ceramic laminate formed by stacking a plurality of ceramic layers, and a pattern surface parallel to a surface of the ceramic layer inside the ceramic laminate.
- a ground external electrode is provided, and predetermined ends of a plurality of strip-shaped coil conductor patterns are connected to each other by a plurality of interlayer connection via holes to form a coil whose coil axis is orthogonal to the stacking direction of the ceramic layers.
- a ground external electrode is provided, and between the surface on which the strip-shaped coil conductor pattern is formed and the surface facing the strip-shaped coil conductor pattern surface of the ceramic laminate, in the stacking direction of the ceramic layers.
- the ceramic layer has a dielectric ceramic force, and the remaining ceramic layers of the ceramic laminate have a magnetic ceramic force.
- the band-shaped coil conductor pattern and the ground external electrode face each other, so that a large capacitance can be formed between the band-shaped coil conductor pattern and the ground external electrode.
- a multi-stage filter can be configured by providing the ground external electrode on the surface of the ceramic laminate so as not to face the via hole for interlayer connection forming a part of the coil. Further, the ceramic layer between the surface on which the strip-shaped coil conductor pattern is formed and the surface of the ceramic laminate facing the strip-shaped coil conductor pattern surface may be manufactured by using dielectric ceramics. , A multi-stage filter can be configured. As a result, a multilayer ceramic electronic component having a steep damping characteristic can be obtained.
- FIG. 1 is an exploded perspective view showing a first embodiment of a multilayer ceramic electronic component according to the present invention.
- FIG. 2 is an internal perspective view of the multilayer ceramic electronic component shown in FIG. 1.
- FIG. 3 is a vertical sectional view of the multilayer ceramic electronic component shown in FIG. 2.
- FIG. 4 is an electrical equivalent circuit diagram of the multilayer ceramic electronic component shown in FIG.
- FIG. 5 is an external perspective view showing a modification of the first embodiment.
- FIG. 6 is an external perspective view showing another modification of the first embodiment.
- FIG. 7 is an exploded perspective view showing a multilayer ceramic electronic component according to a second embodiment of the present invention.
- FIG. 8 is an internal perspective view of the multilayer ceramic electronic component shown in FIG. 7.
- FIG. 9 is a vertical sectional view of the multilayer ceramic electronic component shown in FIG.
- FIG. 10 is an electrical equivalent circuit diagram of the multilayer ceramic electronic component shown in FIG.
- FIG. 11 is an internal perspective view showing a third embodiment of the multilayer ceramic electronic component according to the present invention.
- FIG. 12 is a vertical sectional view of the multilayer ceramic electronic component shown in FIG. 11.
- FIG. 13 is an electrical equivalent circuit diagram of the multilayer ceramic electronic component shown in FIG.
- FIG. 14 is a horizontal sectional view showing a conventional example.
- FIG. 15 is an internal perspective view showing another conventional example.
- the multilayer LC filter 1 includes ceramic green sheets 13a, 13b provided with a plurality of strip-shaped coil conductor patterns 9, lead conductor patterns 11, and via holes 7 for interlayer connection, and via holes 7 for interlayer connection. Ceramic green sheets 15a, 15b, 15c, 15d provided, ceramic green sheets 14a provided with a plurality of band-shaped coil conductor patterns 10 and via holes 7 for interlayer connection, and ceramic green sheets provided with a plurality of band-shaped coil conductor patterns 10 14b, and outer layer green ceramic sheets 16a, 16b, 16c, 16d and the like.
- the ceramic green sheets 13a, 13b, 14a, 14b, 15a-15d, 16a-16d are, for example, It is made by kneading Fe—Ni—Cu ferrite ceramic powder or dielectric ceramic powder together with a binder, etc., into a sheet by a method such as the doctor blade method. However, in the first embodiment, it is assumed that all the ceramic green sheets 13a to 16d are manufactured (that is, made of a single material) using either the ceramic powder or the dielectric ceramic powder. The sheet and the dielectric sheet are mixed in the laminated LC filter 1.
- the strip-shaped coil conductor patterns 9 and 10 and the lead conductor pattern 11 are formed by a method such as screen printing or the like using Ag, Pd, Cu, Au, or an alloy thereof.
- a via hole 7 for interlayer connection which is a coil conductor, is formed with a laser beam or the like, and the hole is filled with a conductive paste mainly composed of Ag, Pd, Cu, Au, or an alloy thereof. It is formed by doing.
- the strip-shaped coil conductor pattern 9 and the strip-shaped coil conductor pattern 10 are arranged in parallel on the sheets 13a and 13b and on the sheets 14a and 14b, respectively.
- the via holes 7 for interlayer connection have their axes arranged in the stacking direction of the sheets 13a to 16d and are connected. Then, the ends of the strip-shaped coil conductor pattern 9 are electrically connected to the ends of the strip-shaped coil conductor pattern 10 through the via holes 7 for interlayer connection, thereby forming the strip-shaped coil conductor pattern 9 and the strip-shaped coil conductor pattern. 10 are alternately electrically connected in series to form a helical coil L1.
- the lead conductor patterns 11 are exposed on the left and right sides of the sheets 13a and 13b, respectively.
- Each of the sheets 13a to 16d is stacked and pressed, and then integrally fired to form a laminate 21 having a rectangular parallelepiped shape as shown in FIG.
- Input / output external electrodes 22 and 23 are formed on the left and right end surfaces of the laminate 21, and a ground external electrode 24 is formed on the bottom surface of the laminate 21.
- the external electrodes 22-24 are formed by a method such as coating and baking, sputtering, or vapor deposition.
- the lead conductor patterns 11 are connected to the external electrodes 22 and 23, respectively.
- the ground external electrode 24 is not connected to any of them. Then, apply Ni plating and Sn plating on the surface of the external electrodes 22-24 to improve solderability.
- the laminated LC filter 1 having the above-described constitutional strength has a spiral coil L1 in which the coil axis is orthogonal to the stacking direction of the sheets 13a-16d (the direction indicated by the arrow K) inside the laminated body 21. ing. Further, input / output external electrodes 22, 23 electrically connected to both ends of the spiral coil L1 are provided on both left and right end surfaces of the laminated LC filter 1. Therefore, the coil L1 is a so-called “vertical laminated horizontal coil” coil.
- FIG. 4 is an electrical equivalent circuit diagram of the multilayer LC filter 1.
- Each of the capacitances C1 and C4 forms a plurality of resonance circuits together with the inductance of the strip-shaped coil conductor pattern 10, and the plurality of resonance circuits form a multi-stage filter. As a result, a distributed multilayer LC filter 1 having steep attenuation characteristics can be obtained.
- the strip-shaped coil conductor pattern 10 and the ground external electrode 24 constitute the capacitance C1 to C4, the residual inductance is reduced as compared with the LC filter in which the capacitor electrode is built in the laminate. be able to. This is because in the LC filter in which the capacitor electrode is built in the multilayer body, inductance is generated in a lead portion for electrically connecting the capacitor electrode to the external ground electrode. In FIG. 1, since there is no lead-out portion of the capacitor electrode (the external ground electrode 24 also has the function of the capacitor electrode), it has a force to reduce the residual inductance.
- two sheets each having the strip-shaped coil conductor patterns 9 and 10 provided on the surface thereof are overlapped to form the strip-shaped coil conductor patterns 9 and 10 into a two-layer structure.
- the DC resistance value of L1 is reduced.
- FIG. 5 is a perspective view showing a multilayer LC filter 1A in which a ground external electrode 25 is also provided on the upper surface of the multilayer body 21.
- the laminated LC filter 1A has no vertical direction, and the ground external electrode on the upper side is a floating electrode.
- both external ground electrodes 24 and 25 are electrically connected to the ground electrode of the circuit board and function effectively. Will be.
- it may be a laminated LC filter 1B provided with a ground external electrode 26 as shown in FIG.
- the ground external electrode 26 is provided on the upper surface and the bottom surface of the multilayer body 21, and both are connected by a connecting portion 26 a provided on the side surface of the multilayer body 21.
- the connection portion 26a is provided at a position that does not face the via hole 7 for interlayer connection. That is, in the case of the first embodiment, it is necessary to dispose the ground external electrode so as to avoid a portion of the surface of the multilayer body 21 facing the via hole 7 for interlayer connection. This is because if the ground external electrode is provided on the entire outer periphery of the multilayer body 21 so as to cover the coil L1, the multilayer LC filter 1 cannot be a multi-stage filter.
- the laminated LC filter 41 of the second embodiment is the same as the laminated LC filter 1 of the first embodiment except that the material of the ceramic green sheet is changed. That is, in the laminated LC filter 41, the sheets 13a, 13b, 14a, 15a to 15d are made of magnetic ceramics, and the sheets 17, 18a to 18d are made of dielectric ceramics. Therefore, the detailed description is omitted.
- FIG. 8 is an internal perspective view of the laminated LC filter 41
- FIG. 9 is a vertical sectional view thereof.
- the laminated body 51 has a surface on which the strip-shaped coil conductor patterns 9 are formed and a surface on which the strip-shaped coil conductor patterns 10 are arranged in the sheet stacking direction (the direction of arrow K).
- the ceramic layer 52 between them also has a magnetic ceramic force.
- the ceramic layer 53 between the surface on which the strip-shaped coil conductor pattern 9 is formed and the surface (upper surface) of the laminate 51 facing the strip-shaped coil conductor pattern 9 also has a dielectric ceramic force.
- the ceramic layer 54 between the surface on which the strip-shaped coil conductor pattern 10 is formed and the front surface (bottom surface) facing the strip-shaped coil conductor pattern 10 of the laminate 51 is also made of dielectric ceramics. .
- FIG. 10 is an electric equivalent circuit diagram of the multilayer LC filter 1.
- the dielectric constant of the dielectric ceramic of the ceramic layers 53 and 54 it is possible to change the design of the capacitance without affecting the inductance of the coil L1. Furthermore, the insulation resistance can be increased as compared with the case where the laminated body is formed only of magnetic ceramics, and insulation failure between the strip-shaped coil conductor patterns 9 and 10 and the ground external electrode 24 can be reduced.
- the multilayer LC filter of the third embodiment is the same as the multilayer LC filter 41 of the second embodiment except that the shape of the ground external electrode is changed. That is, as shown in FIG. 11, the multilayer LC filter 61 has the ground external electrode 62 provided on the entire outer periphery of the multilayer body 51 so as to cover the coil L1.
- the ceramic layers 53 and 54 of the laminated body 51 also have dielectric ceramic power, and the strip-shaped coil conductor patterns 9 and 10 and the ground external electrode 62 are formed by the dielectric ceramic layers 53 and 54. It faces across a wide area. Further, since the insulating layer between the strip-shaped coil conductor patterns 9 and 10 and the ground external electrode 62 is formed of the ceramic green sheets 17, 18a-18d, the thickness can be easily controlled and the thickness can be reduced. Therefore, large capacitances C1 to C9 are generated between the respective strip-shaped coil conductor patterns 9 and 10 and the ground external electrode 62.
- the magnetic ceramic of the ceramic layer 52 is provided, and Is small.
- a mother block containing multiple laminated LC filters is manufactured in the state of a single laminated block, and then cut for each product size.
- the distance between the ground external electrode 62 and the via hole 7 for interlayer connection becomes long. Therefore, only a small capacitance Cla-C8a is generated between the via hole 7 for interlayer connection and the ground external electrode 62.
- the distance (thickness of the dielectric ceramic layers 53 and 54) between the strip-shaped coil conductor patterns 9 and 10 and the ground external electrode 62 is determined by the distance between the via hole 7 for interlayer connection in the magnetic ceramic layer 52 and the ground external electrode 62.
- the small capacitance C la-C8a is almost negligible compared to the large capacitance C1-C9.
- FIG. 13 is an electrical equivalent circuit diagram of the multilayer LC filter 61.
- the multilayer LC filter 61 when arranging the ground external electrode, can be formed without avoiding the portion of the surface of the multilayer body 51 facing the via hole 7 for interlayer connection. It can be a multi-stage filter.
- multilayer ceramic electronic components include, for example, multilayer inductors and multilayer impedance elements.
- a multilayer ceramic electronic component In the case of manufacturing a multilayer ceramic electronic component, the method is not necessarily limited to a method of stacking ceramic sheets provided with a strip-shaped coil conductor pattern or a via hole and then integrally firing. Further, a multilayer ceramic electronic component may be manufactured by a method described below. That is, after a paste-like ceramic material is applied by printing or the like to form a ceramic layer, a paste-like conductive material is applied to the ceramic layer to form a strip-shaped coil conductor pattern or a via hole. Further, a ceramic material in the form of a paste is also applied with an overpressure to form a ceramic layer. The ceramic electronic component having a laminated structure can be obtained by successively coating in this manner.
- the present invention is useful for a multilayer ceramic electronic component such as a multilayer LC filter, and is particularly excellent in that a large capacitance can be obtained.
Landscapes
- Coils Or Transformers For Communication (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-421020 | 2003-12-18 | ||
JP2003421020A JP2005184343A (ja) | 2003-12-18 | 2003-12-18 | 積層セラミック電子部品 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005060093A1 true WO2005060093A1 (ja) | 2005-06-30 |
Family
ID=34697268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018397 WO2005060093A1 (ja) | 2003-12-18 | 2004-12-09 | 積層セラミック電子部品 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2005184343A (ja) |
WO (1) | WO2005060093A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150022307A1 (en) * | 2012-05-15 | 2015-01-22 | Murata Manufacturing Co., Ltd. | Inductor element |
JP2015042001A (ja) * | 2013-08-23 | 2015-03-02 | 住友電工デバイス・イノベーション株式会社 | 半導体装置 |
EP3493227A4 (en) * | 2016-09-02 | 2020-01-22 | Murata Manufacturing Co., Ltd. | INDUCTOR COMPONENT AND POWER SUPPLY MODULE |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101422950B1 (ko) * | 2012-12-13 | 2014-07-23 | 삼성전기주식회사 | 하나의 권선으로 구현되는 직렬 인덕터 어레이 및 이를 포함하는 필터 |
KR20210145440A (ko) * | 2020-05-25 | 2021-12-02 | 삼성전기주식회사 | 코일 부품 |
WO2024070195A1 (ja) * | 2022-09-26 | 2024-04-04 | ローム株式会社 | 半導体装置 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48100047A (ja) * | 1972-03-30 | 1973-12-18 | ||
JPS55117227A (en) * | 1979-03-01 | 1980-09-09 | Tdk Electronics Co Ltd | Composite part |
JPH0252408A (ja) * | 1988-08-17 | 1990-02-22 | Murata Mfg Co Ltd | Lc複合部品 |
JPH03263311A (ja) * | 1990-02-09 | 1991-11-22 | Toko Inc | 積層複合部品 |
JPH08293416A (ja) * | 1995-04-24 | 1996-11-05 | Canon Inc | ノイズフィルタ |
JPH11186040A (ja) * | 1997-12-22 | 1999-07-09 | Tdk Corp | 積層型ノイズフィルタ |
JP2000196391A (ja) * | 1998-12-24 | 2000-07-14 | Mitsubishi Materials Corp | フィルタ |
JP2002252117A (ja) * | 2000-12-19 | 2002-09-06 | Murata Mfg Co Ltd | 積層型コイル部品及びその製造方法 |
JP2003100524A (ja) * | 2001-09-27 | 2003-04-04 | Murata Mfg Co Ltd | 積層型lc部品 |
-
2003
- 2003-12-18 JP JP2003421020A patent/JP2005184343A/ja active Pending
-
2004
- 2004-12-09 WO PCT/JP2004/018397 patent/WO2005060093A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS48100047A (ja) * | 1972-03-30 | 1973-12-18 | ||
JPS55117227A (en) * | 1979-03-01 | 1980-09-09 | Tdk Electronics Co Ltd | Composite part |
JPH0252408A (ja) * | 1988-08-17 | 1990-02-22 | Murata Mfg Co Ltd | Lc複合部品 |
JPH03263311A (ja) * | 1990-02-09 | 1991-11-22 | Toko Inc | 積層複合部品 |
JPH08293416A (ja) * | 1995-04-24 | 1996-11-05 | Canon Inc | ノイズフィルタ |
JPH11186040A (ja) * | 1997-12-22 | 1999-07-09 | Tdk Corp | 積層型ノイズフィルタ |
JP2000196391A (ja) * | 1998-12-24 | 2000-07-14 | Mitsubishi Materials Corp | フィルタ |
JP2002252117A (ja) * | 2000-12-19 | 2002-09-06 | Murata Mfg Co Ltd | 積層型コイル部品及びその製造方法 |
JP2003100524A (ja) * | 2001-09-27 | 2003-04-04 | Murata Mfg Co Ltd | 積層型lc部品 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150022307A1 (en) * | 2012-05-15 | 2015-01-22 | Murata Manufacturing Co., Ltd. | Inductor element |
US9424981B2 (en) * | 2012-05-15 | 2016-08-23 | Murata Manufacturing Co., Ltd. | Inductor element |
JP2015042001A (ja) * | 2013-08-23 | 2015-03-02 | 住友電工デバイス・イノベーション株式会社 | 半導体装置 |
EP3493227A4 (en) * | 2016-09-02 | 2020-01-22 | Murata Manufacturing Co., Ltd. | INDUCTOR COMPONENT AND POWER SUPPLY MODULE |
Also Published As
Publication number | Publication date |
---|---|
JP2005184343A (ja) | 2005-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100466976B1 (ko) | 적층형 인덕터 | |
JP2002057543A (ja) | 積層型lc部品 | |
JP4637674B2 (ja) | 積層コンデンサ | |
US7542264B2 (en) | Capacitor block and laminated board | |
WO2008013071A1 (fr) | Filtre de bruit | |
WO2021085002A1 (ja) | コイル部品および、これを含むフィルタ回路 | |
US6529101B2 (en) | Multilayered LC filter | |
US20120313729A1 (en) | Lc composite component and structure for mounting lc composite component | |
US9893703B2 (en) | Multilayer electronic component | |
JPH0775208B2 (ja) | インダクター及びインダクターを含む複合部品並びにそれらの製造方法 | |
JP3594031B1 (ja) | 積層セラミック電子部品、積層コイル部品および積層セラミック電子部品の製造方法 | |
JP2018078450A (ja) | 積層型フィルタ | |
WO2005060093A1 (ja) | 積層セラミック電子部品 | |
JP3952716B2 (ja) | 高周波回路部品 | |
JPH10322157A (ja) | 積層型ノイズフィルタ | |
KR20130134868A (ko) | 적층형 인덕터 | |
JP5614495B2 (ja) | 電子部品 | |
JP2670490B2 (ja) | インダクター及びインダクターを含む複合部品並びにそれらの製造方法 | |
KR101963267B1 (ko) | 적층 인덕터 및 그 실장기판 | |
WO2018070105A1 (ja) | 積層型lcフィルタアレイ | |
JP2004119891A (ja) | ノイズフィルタ | |
JPH10215134A (ja) | 積層emiフィルタ | |
JPH0410676Y2 (ja) | ||
JP4325357B2 (ja) | 積層コイル部品および積層コイル部品の製造方法 | |
JP2024024438A (ja) | 電子部品 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |