WO2009113775A2 - 연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터 - Google Patents
연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터 Download PDFInfo
- Publication number
- WO2009113775A2 WO2009113775A2 PCT/KR2009/001037 KR2009001037W WO2009113775A2 WO 2009113775 A2 WO2009113775 A2 WO 2009113775A2 KR 2009001037 W KR2009001037 W KR 2009001037W WO 2009113775 A2 WO2009113775 A2 WO 2009113775A2
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- WO
- WIPO (PCT)
- Prior art keywords
- inductor
- sheets
- soft magnetic
- magnetic metal
- metal powder
- Prior art date
Links
- 239000000843 powder Substances 0.000 title claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 title claims abstract description 24
- 239000000696 magnetic material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000004020 conductor Substances 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 3
- 229910001092 metal group alloy Inorganic materials 0.000 abstract description 3
- 230000005415 magnetization Effects 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 229910000859 α-Fe Inorganic materials 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 229910000889 permalloy Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
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
- H01F17/04—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
- 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
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
Definitions
- the present invention relates to a multilayer power inductor having a high DC superposition characteristic and a high frequency characteristic, and more particularly, to a multilayer power inductor using a magnetic sheet filled with soft magnetic metal powder as a magnetic material.
- the power supply circuit of a portable device also varies in operating power due to the diversification of the device.
- portable devices include power supplies for LCD drives, power amplifier modules, and baseband ICs, which require different voltages to operate, and convert the voltage supplied from the power supply to the operating voltage of each circuit. Requires a power circuit.
- the voltage of these power supply circuits decreases with the miniaturization of semiconductors, the voltage decreases. Therefore, the device may malfunction due to small voltage fluctuations.
- POL distributed power supply
- the technology to do is becoming mainstream. In this way, a power source for controlling each LSI separately is required, and many power supply circuits are incorporated in portable devices.
- the power supply circuit of a portable device is largely divided into a linear regulator and a switching regulator, and a switching regulator having a low power loss when converting a voltage, in general, in a situation where it is required to suppress power consumption and extend a battery life.
- a DC-DC converter are employ
- Oxide ferrites which are mainly used as magnetic materials for multilayer inductors, have high magnetic permeability and low electrical resistance, but low saturation magnetic flux density, resulting in a large reduction in inductance due to magnetic saturation and poor DC superposition characteristics.
- the inductor using ferrite has to go through the sintering process after installing the circuit on the ferrite plate. Due to the distortion of the sintering process, the inductance or the DC overlapping characteristics are limited, so the width cannot be widened. In particular, as inductors have recently been miniaturized and products with a thickness of 1 mm or less are mass-produced, their width is inevitably limited. Thus, various types of inductance and direct current superimposition characteristics cannot be provided.
- the present invention has been made to solve the above problems, and to provide a power inductor without the restriction of the current due to magnetic saturation without leakage flux as its technical problem.
- the technical problem is to provide a power inductor that can be used up to a high frequency band of 10MHz.
- the technical problem is to provide a large-capacity ultra-thin power inductor that can be used without limiting the width.
- Another object of the present invention is to provide a multilayer power inductor having high DC overlapping characteristics without using a nonmagnetic material.
- the present invention provides a multilayer inductor formed by stacking a plurality of magnetic bodies each having a pattern circuit on one surface thereof, and each of the magnetic bodies conducting through via holes, wherein the magnetic bodies are filled with soft magnetic metal powder.
- a multilayer power inductor using a sheet filled with a soft magnetic metal powder.
- the present invention provides a laminated power inductor using a sheet filled with a soft magnetic metal powder, characterized in that the soft magnetic metal powder is anisotropic and arranged in parallel or perpendicular to the sheet surface.
- the present invention provides a stacked power inductor using a sheet filled with a soft magnetic metal powder, characterized in that the soft magnetic metal powder is anisotropic and arranged in parallel to a magnetic path.
- the soft magnetic metal powder in the upper and lower portions of the laminate, is anisotropic and arranged parallel to the sheet surface, and the soft magnetic metal powder is isotropic in the central portion of the laminate.
- a stacked power inductor using a sheet filled with magnetic metal powder.
- FIG. 1 is a schematic development view of a multilayer power inductor of the present invention.
- FIG. 3 is an explanatory diagram when the anisotropic powder is arranged perpendicular to the sheet surface.
- FIG. 4 is an explanatory diagram in the case where anisotropic powders are arranged horizontally on the sheet surface at upper and lower portions of the inductor, and isotropic powders are arranged inside.
- anisotropic powder is arranged horizontally on the sheet surface at the upper and lower portions of the inductor, and anisotropic powder is arranged perpendicularly to the sheet surface inside.
- FIG. 6 is a graph illustrating a change in inductance according to a frequency of a multilayer power inductor.
- FIG. 7 is a graph illustrating changes in inductance according to current of a multilayer power inductor.
- FIG. 1 is a schematic diagram of a power inductor of the present invention.
- the separately manufactured pattern circuit 10 is attached to the upper surface of the magnetic sheet 2 manufactured by the present invention to form one layer.
- the magnetic sheet 2 is formed using a soft magnetic metal alloy powder.
- the soft magnetic metal alloy powder adopts anisotropic or isotropic powder in the form of flat flakes.
- the material of the alloy powder molybdenum permalloy (Mo-permalloy), Permalloy (Permalloy), sand dust (Fe-Si-Al alloy), iron-silicon alloy (Fe-Si alloy) and the like can be used.
- the pattern circuit 10 may be separately manufactured and prepared by a conventional method using a conductive material and formed on one surface of the magnetic sheet 2.
- a first terminal portion 14 and a second terminal portion 16 are formed at both ends of the main circuit portion 12 and the main circuit portion 12 in the form of a coil, respectively.
- each hole is formed in each magnetic sheet 2, and a conductive material is applied to the hole so that the upper and lower pattern circuits 10 are conducted.
- the holes are referred to as via holes, and four via holes 20, 22, 24, and 26 are illustrated in the surface of each magnetic sheet 2 in FIG. 1.
- each via hole (20, 22, 24, 26) of each layer shows a form in which each of the first terminal portion 14 and the second terminal portion 16 is conducted in a different form as needed. Giving. Therefore, if necessary, the pattern circuit 10 may be connected up or down in a form in which each via hole is connected or not.
- FIGS. 2 to 5 are cross-sectional views when the inductor of FIG. 1 is cut at an appropriate position in the thickness direction, and is an explanatory view for explaining the arrangement form of the soft magnetic metal powder in the magnetic sheet.
- the anisotropic alloy powder 40 is arranged to be parallel to the surface of the magnetic sheet 2.
- the anisotropic alloy powder 40 is parallel to the longitudinal direction of the anisotropic alloy powder 40 and the magnetic path 30. However, it is vertical in the center or outside.
- the anisotropic alloy powder 40 is arranged perpendicular to the magnetic sheet 2.
- the anisotropic alloy powder 40 is perpendicular to the longitudinal direction of the anisotropic alloy powder 40 and the magnetic path 30. Or take the form parallel to the outside.
- the anisotropic alloy powder 40 is arranged on the upper and lower parts of the inductor, and the isotropic alloy powder 42 is arranged on the center part and the outer part of the inductor.
- the inductors are parallel at the top and bottom of the inductor.
- they are isotropic powder, so there is no parallelism but no vertical phenomenon.
- FIG. 5 shows another embodiment in which the anisotropic alloy powder 40 is arranged in the upper and lower portions of the inductor in parallel with the magnetic sheet 2, and is vertically arranged in the center and the outer portion.
- the longitudinal direction of the anisotropic alloy powder 40 and the direction of the magnetic path 30 are parallel at all positions.
- a soft magnetic metal powder having anisotropy or isotropy is prepared so that the optimum characteristics of the inductor are implemented according to the magnetic path.
- the soft magnetic metal powder is milled in an attrition mill and manufactured in the form of flakes.
- the powder is dispersed in a resin system at high density to prepare a magnetic sheet.
- the circuit formed by using a conductive material is formed on the upper surface of the magnetic sheet, and at this time, a large number of inductors can be manufactured in a predetermined area to secure economical efficiency.
- a via hole is drilled through the laminated inductor so that the pattern circuit between the layers can be conducted, and the conductive circuit is conducted using plating or conductive paste.
- the finished product is cut consistently to the required size.
- Insulation is applied to the cutting surface by dipping or using a roller.
- Sand dust flakes prepared by milling sand dust powder with an average particle diameter of 70 ⁇ m for 6 hours in an attrition mill and EPDM applied to an organic polymer matrix material were dispersed at a weight ratio of 8: 2, followed by a doctor blade method.
- the green sheet is thermally pressed at 150 ° C. for 1 hour using a hot press to prepare a magnetic sheet.
- Copper foil (Cu foil) on the upper surface of the magnetic sheet is thermally compressed and then etched to implement a conductive circuit.
- Inventive example 1 shows the form of FIG.
- the prepared sheets were laminated to a desired thickness and thermally pressed at 150 ° C. for 1 hour using a hot press to prepare a magnetic sheet having a desired thickness.
- the prepared sheet was cut in the vertical direction using a cutter to apply a sheet in which the anisotropic powder was arranged vertically.
- Inventive Example 2 shows the form of FIG.
- Comparative Example 1 is a multilayer power inductor using a ferrite green sheet as a magnetic material, and is a ferrite magnetic power inductor in which an electrode pattern is formed inside a magnetic body in which four oxide ferrite magnetic layers are stacked and integrally formed.
- Comparative Example 2 is a ferrite winding type power inductor using a conventional oxide ferrite-based magnetic material formed by winding a conductor around a ferrite magnetic core and providing an air gap between the magnetic core and the ferrite case.
- Inductors prepared according to the invention and comparative examples were measured inductance using an impedance analyzer (HP 4294A) in the frequency band of 1 1-110 MHz, and the saturation current was measured using an LCR meter (HP 4284A).
- the saturation current means a current value when the DC bias is reduced by 30%.
- the allowable frequency refers to a switching frequency range that is allowed within 20% of the initial value when the switching frequency is increased.
- Figure 6 is a graph showing the change in inductance with frequency, the comparative examples increase the inductance significantly within the maximum 10 MHz when the frequency is increased, while the invention is allowed because the inductance increases in the state much more than 10 MHz The frequency is very high.
- Figure 7 shows the change in inductance according to the current, it can be seen that the comparative examples are already saturated at about 1.3 A, the invention examples can be seen that the higher than the saturation current.
Abstract
Description
구분 | 허용주파수(MHz) | 인덕턴스(μH) | 포화전류(A) |
발명예 1 | 10 | 2.2 | 2.5 |
발명예 2 | 10 | 4.3 | 2.0 |
발명예 3 | 10 | 3.3 | 2.0 |
발명예 4 | 10 | 10 | 1.5 |
비교예 1 | 10 | 2.2 | 1.3 |
비교예 2 | 5 | 2.2 | 1.3 |
Claims (4)
- 일면에 패턴 회로가 부착된 자성체가 복수 매 적층되고, 상기 각 자성체는 비어홀을 통해 도통되어 이루어지는 적층형 인덕터로서,상기 자성체가 연자성 금속 분말이 충전된 시트인 것을 특징으로 하는 연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터.
- 제 1 항에 있어서,상기 연자성 금속 분말이 이방성이며 시트면에 평행하게 또는 수직되게 배열된 것을 특징으로 하는 연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터.
- 제 1 항에 있어서,상기 연자성 금속 분말이 이방성이며 자기 경로에 평행하게 배열된 것을 특징으로 하는 연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터.
- 제 1 항에 있어서,적층체의 상하부에서는 상기 연자성 금속분말이 이방성이며 시트면에 평행하게 배열되고, 적층체의 중앙부에서는 상기 연자성 금속분말이 등방성인 것을 특징으로 하는 연자성 금속 분말이 충전된 시트를 이용한 적층형 파워 인덕터.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/744,930 US20100308949A1 (en) | 2008-03-11 | 2009-03-03 | Multilayer power inductor using sheets charged with soft magnetic metal powder |
JP2010535895A JP2011504662A (ja) | 2008-03-11 | 2009-03-03 | 軟磁性金属粉末が充填されたシートを用いた積層型パワーインダクタ |
CN2009801012624A CN101896983A (zh) | 2008-03-11 | 2009-03-03 | 使用充满软磁性金属粉末的薄片的多层功率电感器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080022361A KR100982639B1 (ko) | 2008-03-11 | 2008-03-11 | 연자성 금속분말이 충전된 시트를 이용한 적층형 파워인덕터 |
KR10-2008-0022361 | 2008-03-11 |
Publications (2)
Publication Number | Publication Date |
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WO2009113775A2 true WO2009113775A2 (ko) | 2009-09-17 |
WO2009113775A3 WO2009113775A3 (ko) | 2009-11-26 |
Family
ID=41065648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2009/001037 WO2009113775A2 (ko) | 2008-03-11 | 2009-03-03 | 연자성 금속분말이 충전된 시트를 이용한 적층형 파워 인덕터 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100308949A1 (ko) |
JP (1) | JP2011504662A (ko) |
KR (1) | KR100982639B1 (ko) |
CN (1) | CN101896983A (ko) |
WO (1) | WO2009113775A2 (ko) |
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Also Published As
Publication number | Publication date |
---|---|
CN101896983A (zh) | 2010-11-24 |
KR100982639B1 (ko) | 2010-09-16 |
WO2009113775A3 (ko) | 2009-11-26 |
US20100308949A1 (en) | 2010-12-09 |
KR20090097303A (ko) | 2009-09-16 |
JP2011504662A (ja) | 2011-02-10 |
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