WO2008004465A1 - Composant à bobines empilées - Google Patents

Composant à bobines empilées Download PDF

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Publication number
WO2008004465A1
WO2008004465A1 PCT/JP2007/062848 JP2007062848W WO2008004465A1 WO 2008004465 A1 WO2008004465 A1 WO 2008004465A1 JP 2007062848 W JP2007062848 W JP 2007062848W WO 2008004465 A1 WO2008004465 A1 WO 2008004465A1
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WO
WIPO (PCT)
Prior art keywords
thickness
magnetic
layer
coil component
firing
Prior art date
Application number
PCT/JP2007/062848
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English (en)
Japanese (ja)
Inventor
Kenichi Kato
Akihiro Nakamura
Keiichi Tsuzuki
Original Assignee
Murata Manufacturing Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co., Ltd. filed Critical Murata Manufacturing Co., Ltd.
Priority to JP2008523647A priority Critical patent/JP4811465B2/ja
Publication of WO2008004465A1 publication Critical patent/WO2008004465A1/fr

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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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/18—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being compounds
    • H01F10/20—Ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/26—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers
    • H01F10/265—Magnetic multilayers non exchange-coupled
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3293—Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
    • 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
    • H01F2017/002—Details of via holes for interconnecting the layers

Definitions

  • the present invention relates to a laminated coil component, and more particularly to an open magnetic circuit type laminated coil component.
  • Patent Document 1 and Patent Document 2 Ni-Zn-Cu-based materials are provided on both main surfaces of a non-magnetic material layer made of a Cu-Zn-based non-magnetic material for the purpose of improving DC superposition characteristics.
  • An open magnetic circuit type multilayer coil component provided with a magnetic layer made of a magnetic material is described. However, sufficient DC superposition characteristics could not be obtained with this structure alone.
  • Patent Document 3 describes that SnO is 0.2 to 3 wt% for Ni-Zn-Cu based magnetic materials.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-259774
  • Patent Document 2 International Publication 2005/122192 Pamphlet
  • Patent Document 3 Japanese Patent Laid-Open No. 2003-272912
  • an object of the present invention is to provide a laminated coil component having good DC superimposition characteristics.
  • a laminated coil component according to the present invention includes:
  • a helical coil provided in the laminate
  • the magnetic layer is made of a Ni-Zn-Cu-based magnetic material, and the composition ratio is FeO.
  • the non-magnetic layer is made of a Cu_Zn-based non-magnetic material, and the composition ratio is FeO: 45-49 mol%, CuO: 5-15 mol%, the balance: ZnO as a main component, and further as a main component. In contrast, 0.6 to 4 wt% of SnO is added,
  • the SnO content of the nonmagnetic layer may be equal to or higher than the SnO content of the magnetic layer.
  • the Sn content in the magnetic layer is equal to or higher than the Sn content in the magnetic layer, so that the Sn component in the magnetic layer is less likely to diffuse into the nonmagnetic layer during co-sintering. Become.
  • the main component composition of the magnetic layer is
  • the main component composition of the non-magnetic layer is the main component composition of the non-magnetic layer.
  • the thickness of the green sheet constituting the nonmagnetic layer is preferably 25 to 50 ⁇ m (the thickness of the NiZn interdiffusion layer after firing / the thickness of the nonmagnetic layer after firing). Is 0.2 It is preferably in the range of ⁇ 0.6. Inductance value (L value) The temperature change is 12% or less in absolute value, and it becomes a coil component with stable inductance characteristics against temperature change.
  • the thickness of the green sheet constituting the nonmagnetic layer is preferably 30 to 50 ⁇ (the thickness of the NiZn interdiffusion layer after firing Z the thickness of the nonmagnetic layer after firing) ) Is preferably in the range of 0.2 to 0.5.
  • the L value temperature change is 9% or less in absolute value, and the coil component has stable inductance characteristics against temperature change.
  • the thickness of the green sheet constituting the nonmagnetic layer is preferably 6 to 20 am, (the thickness of the NiZn interdiffusion layer after firing Z the thickness of the nonmagnetic layer after firing) May be in the range of 0.7 to 5.0.
  • the L value temperature change is 14 to 35% in absolute value.
  • This coil component can be used, for example, by matching the temperature characteristics of other components (capacitors, etc.) on the wiring board.
  • the thickness of the green sheet constituting the nonmagnetic layer is preferably 6 to 10 ⁇ m, (the thickness of the NiZn interdiffusion layer after firing / the thickness of the nonmagnetic layer after firing).
  • the (thickness) may be in the range of 1.5 to 5.0.
  • L value temperature change is 25 to 35% in absolute value.
  • This coil component exhibits a negative temperature coefficient having a negative slope almost linearly, and can be used, for example, by matching with the temperature characteristics of other components (capacitors, etc.) on the wiring board.
  • the component diffusion at the co-sintering interface becomes moderate by bringing the composition of the nonmagnetic layer close to the composition of the magnetic layer, and the magnetic layer and the nonmagnetic layer during sintering The difference in the shrinkage behavior between the two is reduced, and it is possible to suppress cracks. As a result, it is possible to obtain a laminated coil component with good direct current superposition characteristics.
  • FIG. 1 is an exploded perspective view showing a laminated coil component according to the present invention.
  • FIG. 2 is an external perspective view of the multilayer coil component shown in FIG.
  • FIG. 3 is a vertical sectional view of the laminated coil component shown in FIG.
  • FIG. 4 is an enlarged schematic cross-sectional view of a portion A in FIG.
  • FIG. 6 is a graph showing the rate of temperature change when the thickness of the non-magnetic green sheet is 0, 6, 15 / m.
  • FIG. 1 is an exploded configuration diagram of the laminated coil component 1.
  • the laminated coil component 1 includes a magnetic green sheet 3 with a coil conductor 5 formed on the surface, a magnetic green sheet 2 with no conductor formed on the surface, and a non-magnetic green with a coil conductor 5 formed on the surface. Sheet 4 and are laminated.
  • the magnetic green sheets 2 and 3 are produced as follows. Fe ⁇ , Zn ⁇ , CuO, Ni
  • o is weighed at a specified ratio (see Table 1 below), and each material is put into a ball mill as a raw material and wet mixed. The resulting mixture is dried and then powdered, and the resulting powder is calcined at 750 ° C for 1 hour. The obtained calcined powder is wet pulverized with a ball mill and then dried and force crushed to obtain a magnetic powder.
  • a binder, a plasticizer, a wetting agent, and a dispersing agent are added to the magnetic powder and mixed with a ball minolet, and then defoamed under reduced pressure.
  • the obtained magnetic slurry is formed into a sheet using a lip coater, comma coater or die coater and dried to produce magnetic green sheets 2 and 3 made of a Ni_Zn_Cu based magnetic material.
  • the thickness of the magnetic green sheets 2 and 3 is, for example, 25 zm.
  • Non-magnetic green sheet 4 made of Cu_Zn-based non-magnetic material is composed of FeO, ZnO, C
  • the thickness of the nonmagnetic green sheet 4 is, for example, 20 ⁇ m.
  • via hole conductor holes are formed at predetermined positions of the sheets 3 and 4 by laser beam or punching. Thereafter, a conductive paste is applied to the surface by screen printing to form the coil conductor 5, and at the same time, the via hole conductor hole is filled with the conductive paste to form the interlayer connection via hole conductor.
  • Coil conductor 5 has high Q as an inductor element. In order to realize the value, it is preferable that the resistance value is low. Therefore, noble metals mainly composed of Ag, Au, Pt and the like, base metals such as Cu and Ni, and alloys thereof are used as the conductive paste. From the viewpoint of simultaneous firing at a low temperature, it is preferable to use Ag or an Ag alloy.
  • the coil conductor 5 and the via-hole conductor 10 may be formed separately.
  • the coil conductor 5 may be screen-printed a plurality of times in order to increase the film thickness. Further, instead of the screen printing method, a photolithography method or a transfer method may be used.
  • a plurality of sheets 2, 3, and 4 thus obtained are sequentially stacked and pressed to form a laminate.
  • the non-magnetic green sheet 4 is laminated so as to be positioned approximately at the center in the thickness direction of the laminated body.
  • the respective coil conductors 5 are electrically connected in series via the interlayer connection via-hole conductors 10 to form a spiral 3- il L in the laminate.
  • the coil axis of the spiral 3- il is parallel to the stacking direction of the sheets 2, 3, and 4.
  • the lead portions 6a and 6b of the spiral coil L are exposed on the right and left sides of the magnetic green sheet 3, respectively.
  • This laminate was cut into a predetermined product size, degreased at 500 ° C for 2 hours, and further fired at 890 ° C for 2 hours to obtain a rectangular parallelepiped shape as shown in Fig. 2.
  • a sintered body 20 is obtained.
  • both ends of the sintered body 20 are immersed in an Ag / Pd (80/20) paste bath, and external electrodes 21 and 22 are formed by baking at 780 ° C. for 2 hours.
  • the external electrodes 21 and 22 are electrically connected to the lead-out portions 6a and 6b of the spiral coil L formed in the sintered body 20.
  • the dimensions of the laminated coil component 1 are, for example, length and width 3.2 mm X l .6 mm and thickness 0.85 mm.
  • the open magnetic circuit type multilayer coil component 1 obtained in this way has Ni-Zn_Cu formed on both main surfaces of a non-magnetic layer 4 made of a Cu-Zn-based non-magnetic material.
  • Magnetic layers 3 and 2 are formed of a magnetic material.
  • the magnetic flux ⁇ generated by the spiral coil L passes through the open magnetic path formed by the nonmagnetic layer 4.
  • the magnetic material and the non-magnetic material may be added with BiO in the range of 0.10 to 0.30 after the addition.
  • MnO may be contained in a range of 0.002 to 0.006 wt% (for example, 0.005 wt%).
  • the L value temperature change rate is also as small as 6.5% or less in absolute value (however, in Example 2 it is 8 ⁇ 3%), and the ⁇ 30% current value is also 500mA. The value was higher than that, and it showed good characteristics.
  • the amount of SnO in the non-magnetic material is more than 4. Owt%, such as 6.Owt%, the sinterability will decrease and cracks will occur at the end of the laminate (chip body) during simultaneous firing. Was observed.
  • the amount of SnO of the non-magnetic material is set to the amount of SnO of the magnetic material, but Example 24 is a non-magnetic material compared to Example 21. This is the case where the SnO amount is smaller than the SnO amount of the magnetic material, and the Sn component in the magnetic layer diffuses to the non-magnetic material layer. Will deteriorate. Therefore, the -30% current value also decreased from 540mA to 530mA.
  • Example 25 is a case where the SnO amount of the nonmagnetic material was made smaller than the SnO amount of the magnetic material as compared with Example 22, and the Sn component in the magnetic layer diffused into the nonmagnetic material layer. As a result, the Sn component in the magnetic layer is reduced, and the direct current superimposition characteristics are deteriorated. Therefore, the 30% current value also decreased from 545 mA to 535 mA.
  • Example 26 is a case where the amount of SnO of the nonmagnetic material was smaller than the amount of SnO of the magnetic material compared to Example 23, and the Sn component in the magnetic material layer diffused into the nonmagnetic material layer. As a result, the Sn component in the magnetic layer is reduced, and the direct current superimposition characteristics are deteriorated. Therefore, the 30% current value also decreased from 555 mA to 540 mA.
  • the composition other than the magnetic SnO and the non-magnetic SnO is the composition other than the magnetic SnO and the non-magnetic SnO
  • the difference in the content of the composition other than is as small as possible. That is, the main component composition of the magnetic green sheet is
  • the main component composition of the non-magnetic Darine sheet is
  • composition ratio of non-magnetic material is Fe ⁇ : 47mol%, CuO: 8mol%
  • the L value temperature change rate was 9.2% in absolute value, but the 30% current value was 465 mA, which is much lower than 500 mA.
  • Table 2 shows a case where the laminated coil component 1 is manufactured by using the magnetic material and the nonmagnetic material having the composition of Example 3 shown in Table 1 and changing the thicknesses of the sheets 3 and 4 variously.
  • the evaluation result (L value temperature change rate) is shown.
  • FIG. 4 shows the thickness Tl of the magnetic layer 3 after firing, the thickness ⁇ 2 of the nonmagnetic layer 4 after firing, and the thickness ⁇ 3 of the Ni and ⁇ interdiffusion layer after firing.
  • T1 ′ is the thickness of the magnetic green sheet 3 before firing
  • T2 ′ is the thickness of the nonmagnetic green sheet 4 before firing.
  • the thickness of the non-magnetic green sheet was 6 10 ⁇ , and the L value temperature change rate was in the range of 25 35% in absolute value.
  • Curve A1 in Fig. 5 and curve ⁇ 2 in Fig. 6 show the inductance value and temperature change rate (L value / L) when the temperature is changed in the range of -40 to 125 ° C in the laminated coil component fabricated in Sample 1. Value (25 ° C)).
  • Trial Price 1 has a negative slope almost linearly, and has a negative temperature coefficient. In this way, the laminated coil components of Samples 1 to 4 can be used by matching the temperature characteristics of other electronic components (capacitors, etc.) on the wiring board, for example.
  • the curve C1 in FIG. 5 and the curve C2 in FIG. 6 each show the characteristics when the nonmagnetic green sheet is not provided. If the thickness of the non-magnetic green sheet is less than 5 ⁇ m, it will not remain as a non-magnetic layer due to mutual diffusion.
  • the thickness of the non-magnetic green sheet was 15 to 20 zm, and the L value temperature change rate was in the range of 14 to 20% in absolute value.
  • Curve B1 in Fig. 5 and curve B2 in Fig. 6 show the inductance value and rate of change of temperature (L) when the temperature is changed in the range of 40 ° C to 125 ° C for the laminated coil part fabricated in Sample 5. Value ZL value (25 ° C)).
  • the laminated coil components of Samples 5 to 10 can be used by matching the temperature characteristics of other electronic components (capacitors, etc.) on the wiring board, for example.
  • the thickness of the nonmagnetic green sheet was 25 / im, and the L value temperature change rate was in the range of 10 to 12% in absolute value.
  • the laminated coil parts of Samples 11 to 13 can be used in various applications as elements having stable inductance characteristics with respect to temperature changes.
  • the thickness of the non-magnetic green sheet was 30 to 50 ⁇ m, and the L value temperature change rate was 9% or less in absolute value.
  • the laminated coil component of Samples 14 to 22 can be used for various applications as an element having a more stable inductance characteristic with respect to a temperature change. If the thickness of the non-magnetic green sheet is 40-50 ⁇ m, it is even better. When the thickness of the non-magnetic green sheet exceeds 50 zm, the inductance characteristic as an open magnetic circuit tends to decrease, but it may be adjusted according to the required L value.
  • laminated coil component according to the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the gist thereof.
  • the one in which one nonmagnetic layer is disposed in the central portion of the laminated body is shown. Up and down They may be separated into three layers. Alternatively, the nonmagnetic layer may be arranged in two layers so that the coil is divided into approximately three equal parts. The magnetic layer may be arranged in more than one layer.
  • the present invention is useful for an open magnetic circuit type laminated coil component, and is particularly excellent in that the DC folding characteristic is good.

Abstract

L'invention propose un composant à bobines empilées ayant de bonnes propriétés de superposition en courant continu. Le composant à bobines empilées comprend une bobine en spirale (L) fournie à l'intérieur d'un stratifié comprenant une couche de matériau magnétique disposée sur les deux surfaces principales d'une couche de matériau non magnétique. Une feuille verte (3) de matériau magnétique comprend en tant que composants principaux : Fe2O3 : 45 à 49 % en mol, ZnO : 1 à 32 % mol, et CuO : 5 à 15 % en mol avec l'équilibre consistant en : NiO et 0,6 à 4 % en poids total de SnO2 ajoutés aux composants principaux. Une feuille verte (4) de matériau non magnétique comprend en tant que composants principaux : Fe2O3: 45 à 49 % en mol et CuO : 5 to 15 % en mol, avec l'équilibre consistant en ZnO, et 0,6 à 4 % en poids total de SnO2 ajoutés aux composants principaux.
PCT/JP2007/062848 2006-07-04 2007-06-27 Composant à bobines empilées WO2008004465A1 (fr)

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JP2006184743 2006-07-04
JP2006-184743 2006-07-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014183182A (ja) * 2013-03-19 2014-09-29 Fdk Corp 非磁性材料および非磁性磁器組成物の製造方法
WO2015022207A1 (fr) * 2013-08-14 2015-02-19 Thales Composant ferrite pour application de puissance et procede de fabrication du composant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101715539B1 (ko) * 2012-12-14 2017-03-13 가부시키가이샤 무라타 세이사쿠쇼 적층 코일 부품

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JPH0677022A (ja) * 1992-03-31 1994-03-18 Tdk Corp 複合積層部品用非磁性フェライトおよび複合積層部品
JPH097835A (ja) * 1995-06-15 1997-01-10 Tdk Corp 積層ノイズ対策部品
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