JP2000208316A - Magnetic ferrite material, laminated chip ferrite component, and composite laminated component - Google Patents

Magnetic ferrite material, laminated chip ferrite component, and composite laminated component

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Publication number
JP2000208316A
JP2000208316A JP11004225A JP422599A JP2000208316A JP 2000208316 A JP2000208316 A JP 2000208316A JP 11004225 A JP11004225 A JP 11004225A JP 422599 A JP422599 A JP 422599A JP 2000208316 A JP2000208316 A JP 2000208316A
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JP
Japan
Prior art keywords
ferrite
magnetic
component
magnetic ferrite
ferrite material
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP11004225A
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Japanese (ja)
Other versions
JP3343813B2 (en
Inventor
Akinori Oi
明徳 大井
Atsushi Nakano
敦之 中野
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TDK Corp
Original Assignee
TDK Corp
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Classifications

    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic ferrite material, containing large crystal grains and having high magnetic permeability, a laminated chip ferrite component or composite laminated component having high absorption characteristic and high inductance on the low-frequency side. SOLUTION: A magnetic ferrite material contains Fe2O3, NiO, CuO, and ZnO as principal elements, a glass component comprising at least of SiO2, B2O3, and Na2O, and magnetic ferrite crystal size grain in the range of 3-50 μm. A laminated chip ferrite component is constituted by alternately laminating multiple magnetic ferrite layers composed of the magnetic ferrite material and multiple internal electrodes 3 upon another. A composite laminated component is set as LC composite laminated component or transformer composite laminated component, formed by alternately laminating the ferrite magnetic layers composed of the magnetic ferrite material and internal electrodes.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、磁性フェライト材
料と、この磁性フェライト材料を磁性材料として用いる
積層型チップフェライト部品およびＬＣ複合積層型部品
やトランス複合積層型部品等の積層型フェライト部品に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic ferrite material, and a multilayer ferrite component such as a multilayer chip ferrite component and an LC composite multilayer component or a transformer composite multilayer component using the magnetic ferrite material as a magnetic material.

【０００２】[0002]

【従来の技術】積層型チップインダクタや積層型チップ
ビーズ等の積層型チップフェライト部品、ＬＣ複合積層
型部品等の複合積層型部品は、体積が小さいこと、堅牢
性および信頼性が高いことなどから、各種電子機器に多
用されている。このような積層型フェライト部品は、通
常、磁性フェライトからなる磁性層用のシートやペース
ト、および、内部電極用のペーストを厚膜積層技術によ
って積層一体化した後、焼成し、得られた燒結体表面に
外部電極用ペーストを印刷ないし転写した後に焼成して
製造される。この場合、磁性層に用いられる磁性フェラ
イト材料は、内部電極用材料の融点以下での低温焼成が
可能であるという点から、ＮｉＣｕＺｎフェライトやＮ
ｉＺｎフェライトが一般に用いられている。2. Description of the Related Art Composite multilayer ferrite components such as multilayer chip inductors and multilayer chip beads, and composite multilayer components such as LC composite multilayer components are small in volume, high in robustness and high reliability. Are widely used in various electronic devices. Such a laminated ferrite component is generally obtained by laminating and integrating a sheet or paste for a magnetic layer made of magnetic ferrite, and a paste for an internal electrode by a thick film lamination technique, and then firing the resulting sintered body. It is manufactured by printing or transferring an external electrode paste on the surface and then firing. In this case, the magnetic ferrite material used for the magnetic layer can be baked at a temperature lower than the melting point of the internal electrode material.
iZn ferrite is generally used.

【０００３】一方、近年の情報通信分野および高周波分
野の急速な展開の中、電磁障害対策部品の必要性が非常
に高まってきている。そして、上述の積層型フェライト
部品に要求されている一つの特性として、低周波での吸
収特性が挙げられる。従来、吸収特性をより低周波側で
発揮するためには、フェライトの透磁率を高くすること
が知られている。例えば、硼珪酸ガラスを添加すること
で液相燒結を形成し、フェライトの結晶粒成長を促進し
て透磁率を高くする方法がある（特開平５−３２６２４
１号公報）。また、ＮｉＣｕＺｎフェライトに硼珪酸ガ
ラスを添加することで、フェライトの結晶粒子が内部電
極用材料から拡散して析出したＡｇ等から受ける内部応
力が減少し、フェライトの透磁率が高くなり、インダク
タンスＬの大きい積層型チップフェライト部品が開示さ
れている（特開平８−１４８３３８号公報）。On the other hand, with the rapid development of the information communication field and the high-frequency field in recent years, the necessity of components for preventing electromagnetic interference has been greatly increased. One of the characteristics required for the above-mentioned laminated ferrite component is an absorption characteristic at a low frequency. Conventionally, it has been known to increase the magnetic permeability of ferrite in order to exhibit absorption characteristics at lower frequencies. For example, there is a method in which liquid phase sintering is formed by adding borosilicate glass to promote crystal growth of ferrite to increase magnetic permeability (Japanese Patent Laid-Open No. 5-32624).
No. 1). In addition, by adding borosilicate glass to NiCuZn ferrite, the internal stress received from Ag or the like, which crystal grains of the ferrite diffuse from the material for the internal electrode, decrease, the magnetic permeability of the ferrite increases, and the inductance L decreases. A large laminated chip ferrite component has been disclosed (Japanese Patent Application Laid-Open No. 8-148338).

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、積層型
フェライト部品に用いられるＮｉＣｕＺｎフェライト
は、Ａｇ内部電極と同時焼成されるので、その組成や焼
成温度（Ａｇの融点（９６０℃）以下）、および、添加
物の種類や含有量等に制限があり、硼珪酸ガラスを添加
してフェライトの結晶粒成長を促進しても、その透磁率
は最高で１５００程度であり、上述の特性に対する要請
を十分に満足できるものではなかった。However, since the NiCuZn ferrite used for the laminated ferrite component is co-fired with the Ag internal electrode, its composition and firing temperature (below the melting point of Ag (960 ° C.)) and There are restrictions on the types and contents of additives, and even if borosilicate glass is added to promote the growth of crystal grains of ferrite, its magnetic permeability is at most about 1500, and the demand for the above-mentioned properties is not sufficiently satisfied. It was not satisfactory.

【０００５】本発明は、上記のような事情に鑑みてなさ
れたものであり、結晶粒径が大きく高い透磁率をもつ磁
性フェライト材料と、低周波での高い吸収特性や高いイ
ンダクタンスＬをもつ積層型チップフェライト部品や複
合積層型部品を提供することを目的とする。The present invention has been made in view of the above circumstances, and has been developed in consideration of a magnetic ferrite material having a large crystal grain size and a high magnetic permeability, and a laminate having a high absorption characteristic at a low frequency and a high inductance L. It is an object of the present invention to provide a die chip ferrite component and a composite laminated component.

【０００６】[0006]

【課題を解決するための手段】このような目的を達成す
るために、本発明の磁性フェライト材料は、Ｆｅ2 Ｏ
3 、ＮｉＯ、ＣｕＯおよびＺｎＯを主成分とし、ガラス
成分として少なくともＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2
Ｏを含有し、磁性フェライトの結晶粒径が３〜５０μｍ
の範囲であるような構成とした。また、本発明の磁性フ
ェライト材料は、Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺ
ｎＯからなる主成分に対して、ＳｉＯ2 、Ｂ2 Ｏ3 およ
びＮａ2 Ｏからなるガラス成分が総量で８０〜２０００
ｐｐｍの範囲で含有されるような構成とした。Means for Solving the Problems To achieve such an object
Therefore, the magnetic ferrite material of the present invention isTwo O
Three , NiO, CuO and ZnO as main components, glass
At least SiO as a componentTwo , BTwo OThree And NaTwo 
O-containing, magnetic ferrite crystal grain size is 3-50 μm
It was set as the structure which was in the range of. Further, the magnetic disk of the present invention
Ferrite material is FeTwo OThree , NiO, CuO and Z
The main component of nO is SiO 2Two , BTwo OThree And
And NaTwo 80-2000 in total of glass components consisting of O
The composition was such that it was contained in the range of ppm.

【０００７】また、本発明の磁性フェライト材料は、前
記ガラス成分に占めるＮａ2 Ｏ量が１〜２０重量％の範
囲内であるような構成とした。Further, the magnetic ferrite material of the present invention is configured such that the Na 2 O content in the glass component is in the range of 1 to 20% by weight.

【０００８】さらに、本発明の磁性フェライト材料は、
Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎＯの組成が、Ｆ
ｅ2 Ｏ3 ：４９〜５０モル％、ＮｉＯ：６〜１３モル
％、ＣｕＯ：６〜１４モル％、ＺｎＯ：２８〜３３モル
％の範囲内にあるような構成とした。Further, the magnetic ferrite material of the present invention comprises:
If the composition of Fe 2 O 3 , NiO, CuO and ZnO is F
e 2 O 3: 49~50 mol%, NiO: 6 to 13 mol%, CuO: having 6 to 14 mol%, ZnO: and that there configuration to 28-33 mole% in the range.

【０００９】本発明の積層型チップフェライト部品は、
磁性フェライト層と内部電極とを多層積層して構成され
る積層型チップフェライト部品であって、前記磁性フェ
ライト層は上記の磁性フェライト材料で構成されている
ものとした。[0009] The multilayer chip ferrite part of the present invention comprises:
A multilayer chip ferrite component configured by laminating a magnetic ferrite layer and internal electrodes in a multilayer, wherein the magnetic ferrite layer is formed of the above magnetic ferrite material.

【００１０】本発明の複合積層型部品は、フェライト磁
性層と内部電極とを積層して構成されるチップフェライ
ト部を有するＬＣ複合積層型部品であって、前記フェラ
イト磁性層は上記の磁性フェライト材料で構成されてい
るものとした。[0010] The composite laminated component of the present invention is an LC composite laminated component having a chip ferrite portion formed by laminating a ferrite magnetic layer and an internal electrode, wherein the ferrite magnetic layer is made of the above magnetic ferrite material. .

【００１１】本発明の複合積層型部品は、フェライト磁
性層と内部電極とを積層して構成されるフェライト部を
有するトランス複合積層型部品であって、前記フェライ
ト磁性層は上記の磁性フェライト材料で構成されている
ものとした。The composite laminated component of the present invention is a transformer composite laminated component having a ferrite portion formed by laminating a ferrite magnetic layer and an internal electrode, wherein the ferrite magnetic layer is made of the above-mentioned magnetic ferrite material. It is assumed that it is composed.

【００１２】このような本発明では、磁性フェライトの
結晶粒径が３〜５０μｍと大きいので、高い透磁率を有
する磁性フェライト材料が可能となり、この磁性フェラ
イト材料を用いた積層型チップフェライト部品や複合積
層型部品は、インダクタンスＬや吸収特性等の特性向上
が可能となる。In the present invention, since the crystal grain size of the magnetic ferrite is as large as 3 to 50 μm, a magnetic ferrite material having a high magnetic permeability can be obtained. The multilayer component can improve characteristics such as inductance L and absorption characteristics.

【００１３】[0013]

【発明の実施の形態】以下に本発明の実施の形態につい
て説明する。Embodiments of the present invention will be described below.

【００１４】磁性フェライト材料 本発明の磁性フェライト材料は、ＮｉＣｕＺｎフェライ
ト材料中に特定のガラス成分を含有することにより、焼
成時の結晶粒成長がより促進されることを見出してなさ
れたものである。すなわち、Ｆｅ2 Ｏ3 、ＮｉＯ、Ｃｕ
ＯおよびＺｎＯを主成分とし、ガラス成分として少なく
ともＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏを含有する磁性
フェライト材料であり、磁性フェライトの結晶粒径が３
〜５０μｍ、好ましくは３〜１０μｍの範囲のものであ
る。結晶粒径が３μｍ未満の場合、磁性フェライト材料
の透磁率が不十分なものとなり、このような磁性フェラ
イト材料で構成された磁性フェライト層等を備える積層
型フェライト部品は、インダクタンスＬや吸収特性等の
特性が不十分なものとなる。 Magnetic Ferrite Material The magnetic ferrite material of the present invention has been found to contain a specific glass component in the NiCuZn ferrite material to promote the growth of crystal grains during firing. That is, Fe 2 O 3 , NiO, Cu
A magnetic ferrite material containing O and ZnO as main components and at least SiO 2 , B 2 O 3 and Na 2 O as glass components.
５０50 μm, preferably 3-10 μm. When the crystal grain size is less than 3 μm, the permeability of the magnetic ferrite material becomes insufficient, and a multilayer ferrite component having a magnetic ferrite layer or the like made of such a magnetic ferrite material has an inductance L and an absorption characteristic. Characteristics become insufficient.

【００１５】ここで、本発明における結晶粒径は、以下
の方法により計測した数値を意味する。すなわち、磁性
フェライト材料を鏡面研磨し、フッ酸によりエッチング
を施し、粒径がはっきり確認できる状態とし、この状態
を電子顕微鏡等を用いて５０００倍程度の写真を撮る。
次に、写真上で任意の一定方向の２平行線が粒子に外接
するときの距離を計測し、この計測を最低１００個の粒
子について行い、その平均値を結晶粒径とする。Here, the crystal grain size in the present invention means a numerical value measured by the following method. That is, the magnetic ferrite material is mirror-polished and etched with hydrofluoric acid so that the particle size can be clearly confirmed, and a photograph of about 5000 times is taken of this state using an electron microscope or the like.
Next, the distance when two parallel lines in any given direction circumscribe the particles on the photograph is measured, and this measurement is performed on at least 100 particles, and the average value is defined as the crystal grain size.

【００１６】本発明の磁性フェライト材料では、ＳｉＯ
2 、Ｂ2 Ｏ3 およびＮａ2 Ｏの３種の酸化物からなるガ
ラス成分の総量が、Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよび
ＺｎＯからなる主成分に対して８０〜２０００ｐｐｍ、
好ましくは２００〜５００ｐｐｍの範囲で含有される。
上記の３種の酸化物の総量が８０ｐｐｍ未満であると、
液相燒結に必要な液相量が不足して結晶粒成長は促進さ
れない。一方、３種の酸化物の総量が２０００ｐｐｍを
超えると、結晶粒界に存在するガラス層の厚みが大き過
ぎ、フェライトとガラスの線膨張係数の差による内部応
力の発生が増大し、透磁率が減少してしまう。また、上
記の３種の酸化物の個々の含有量としては、ＳｉＯ2 ：
１０〜５００ｐｐｍ、Ｂ2 Ｏ3 ：５０〜１４００ｐｐ
ｍ、Ｎａ2Ｏ：１０〜３００ｐｐｍの範囲が好ましい。
特に、上記の３種の酸化物からなるガラス成分に占める
Ｎａ2 Ｏ量は、１〜２０重量％の範囲内であることが好
ましい。ガラス成分に占めるＮａ2 Ｏ量が１重量％未満
であると、結晶粒成長の促進が不十分となり、２０重量
％を超えると、フェライトの絶縁抵抗率が低下し、湿度
等の影響を受けて信頼性特性を悪化させることになり好
ましくない。In the magnetic ferrite material of the present invention, SiO 2
2 , the total amount of glass components composed of three kinds of oxides of B 2 O 3 and Na 2 O is 80 to 2000 ppm with respect to a main component composed of Fe 2 O 3 , NiO, CuO and ZnO,
Preferably, it is contained in the range of 200 to 500 ppm.
When the total amount of the above three oxides is less than 80 ppm,
Since the amount of liquid phase necessary for liquid phase sintering is insufficient, crystal grain growth is not promoted. On the other hand, when the total amount of the three types of oxides exceeds 2000 ppm, the thickness of the glass layer existing at the crystal grain boundaries is too large, and the occurrence of internal stress due to the difference in the linear expansion coefficient between ferrite and glass increases, and the magnetic permeability decreases. Will decrease. The content of each of the above three oxides is SiO 2 :
10~500ppm, B 2 O 3: 50~1400pp
m, Na 2 O: The range of 10 to 300 ppm is preferred.
In particular, Na 2 O amount occupying the glass component consisting of three oxides mentioned above, is preferably in the range of 1 to 20 wt%. If the amount of Na 2 O in the glass component is less than 1% by weight, the promotion of crystal grain growth becomes insufficient, and if it exceeds 20% by weight, the insulation resistivity of ferrite decreases and the influence of humidity and the like causes It is not preferable because the reliability characteristics are deteriorated.

【００１７】尚、本発明の磁性フェライト材料は、上記
のＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2Ｏの３種の酸化物か
らなるガラス成分の他に、Ｐ2 Ｏ5 、ＧｅＯ2 、Ａｓ2
Ｏ3、ＣａＯ、ＢａＯ、ＰｂＯ、Ａｌ2 Ｏ3 、Ｖ2 Ｏ
5 、ＷＯ3 、ＭｏＯ3 、ＴｅＯ 2 、ＭｇＯ等のガラス化
可能な酸化物の１種または２種以上を０．２重量％未満
の範囲で含有してもよい。Incidentally, the magnetic ferrite material of the present invention is characterized in that
SiOTwo , BTwo OThree And NaTwoThree kinds of oxides of O
In addition to the glass componentTwo OFive , GeOTwo , AsTwo 
OThree, CaO, BaO, PbO, AlTwo OThree , VTwo O
Five , WOThree , MoOThree , TeO Two Of MgO, MgO, etc.
Less than 0.2% by weight of one or more possible oxides
May be contained in the range.

【００１８】本発明の磁性フェライト材料では、主成分
であるＦｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎＯの組成
は、下記の範囲内とすることができる。 ・Ｆｅ2 Ｏ3 ：４９〜５０モル％、好ましくは４９．４
〜４９．８モル％ ・ＮｉＯ ：６〜１３モル％、好ましくは７〜１０モル
％ ・ＣｕＯ ：６〜１４モル％、好ましくは７〜１２モル
％ ・ＺｎＯ ：２８〜３３モル％、好ましくは３０〜３２
モル％In the magnetic ferrite material of the present invention, the composition of the main components Fe 2 O 3 , NiO, CuO and ZnO can be in the following range. Fe 2 O 3 : 49 to 50 mol%, preferably 49.4
４９49.8 mol% NiO: 6 to 13 mol%, preferably 7 to 10 mol% CuO: 6 to 14 mol%, preferably 7 to 12 mol% ZnO: 28 to 33 mol%, preferably 30 ~ 32
Mol%

【００１９】磁性フェライト材料のＦｅ2 Ｏ3 、Ｎｉ
Ｏ、ＣｕＯおよびＺｎＯの組成が上記の範囲を外れた領
域では、透磁率が不十分なものとなる。具体的には、例
えば、Ｆｅ2 Ｏ3 量が上記の範囲から外れた場合、透磁
率が低下する。また、ＺｎＯ量が少な過ぎる場合、透磁
率が減少し、多過ぎると室温での透磁率は増加するが、
キュリー点が低下し、使用温度範囲内で透磁率の急激な
低下が発生して使用に耐えない。また、ＮｉＯ量とＣｕ
Ｏ量は、主成分組成からＦｅ2 Ｏ3 量とＺｎＯ量を引い
た残りを分けることになるが、ＣｕＯ量が上記の範囲よ
り少ないと、燒結性が不足して透磁率は低下し、上記範
囲を超えると、比抵抗が低下し実用に供し得ない。The magnetic ferrite materials Fe 2 O 3 and Ni
In a region where the composition of O, CuO and ZnO is out of the above range, the magnetic permeability becomes insufficient. Specifically, for example, when the amount of Fe 2 O 3 is out of the above range, the magnetic permeability decreases. When the amount of ZnO is too small, the magnetic permeability decreases. When the amount is too large, the magnetic permeability at room temperature increases.
The Curie point decreases, and the magnetic permeability sharply decreases within the operating temperature range, making it unusable for use. In addition, NiO content and Cu
The amount of O separates the remainder obtained by subtracting the amount of Fe 2 O 3 and the amount of ZnO from the main component composition. However, if the amount of CuO is less than the above range, the sintering property becomes insufficient and the magnetic permeability decreases, and If it exceeds the range, the specific resistance is lowered and cannot be put to practical use.

【００２０】尚、本発明の磁性フェライト材料のＦｅ2
Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎＯの主成分組成の分
析、ＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏのガラス成分の
分析は、ガラスビート法による蛍光Ｘ線分析で測定する
ことができる。The magnetic ferrite material of the present invention, Fe 2
The analysis of the main component composition of O 3 , NiO, CuO, and ZnO, and the analysis of the glass components of SiO 2 , B 2 O 3, and Na 2 O can be measured by X-ray fluorescence analysis using a glass beat method.

【００２１】積層チップフェライト部品 本発明の積層型チップフェライト部品は、磁性フェライ
ト層と内部電極とを多層積層して構成され、磁性フェラ
イト層を本発明の磁性フェライト材料で構成したもので
ある。 Multilayer Chip Ferrite Component The multilayer chip ferrite component of the present invention is formed by laminating a magnetic ferrite layer and internal electrodes in multiple layers, and the magnetic ferrite layer is formed of the magnetic ferrite material of the present invention.

【００２２】図１は、本発明の積層型チップフェライト
部品の一実施形態である積層型チップインダクタの一例
を示す概略断面図であり、図２は平面部分断面図であ
る。図１および図２において、積層型チップインダクタ
１は、磁性フェライト層２と内部電極３とが交互に積層
一体化された多層構造のチップ体４を有し、このチップ
体４の端部には、内部電極３と電気的に導通する外部電
極５，５が設けられている。FIG. 1 is a schematic sectional view showing an example of a multilayer chip inductor which is one embodiment of the multilayer chip ferrite component of the present invention, and FIG. 2 is a partial sectional view of a plane. 1 and 2, the multilayer chip inductor 1 has a multilayered chip body 4 in which magnetic ferrite layers 2 and internal electrodes 3 are alternately laminated and integrated. , External electrodes 5 and 5 electrically connected to the internal electrode 3 are provided.

【００２３】積層型チップインダクタ１を構成する磁性
フェライト層２は、上述の本発明の磁性フェライト材料
で構成されたものである。すなわち、本発明の磁性フェ
ライト材料を得るためのＦｅ2 Ｏ3 、ＮｉＯ、ＣｕＯお
よびＺｎＯを主成分とした仮焼成粉と、ＳｉＯ2 、Ｂ2
Ｏ3 およびＮａ2 Ｏのガラス成分の各粉体とを、エチル
セルロース等のバインダとテルピネオール、ブチルカル
ビトール等の溶剤とともに混練して磁性フェライト層用
ペーストを調製し、この磁性フェライト層用ペーストを
内部電極用ペーストと交互に印刷積層した後、焼成して
形成することができる。The magnetic ferrite layer 2 constituting the multilayer chip inductor 1 is made of the above-described magnetic ferrite material of the present invention. That is, a calcined powder mainly containing Fe 2 O 3 , NiO, CuO and ZnO for obtaining the magnetic ferrite material of the present invention, SiO 2 , B 2
The powders of the glass components of O 3 and Na 2 O are kneaded with a binder such as ethyl cellulose and a solvent such as terpineol or butyl carbitol to prepare a paste for the magnetic ferrite layer, and the paste for the magnetic ferrite layer is placed inside. After alternately printing and laminating with the electrode paste, it can be formed by firing.

【００２４】この磁性フェライト層用ペースト中のバイ
ンダおよび溶剤の含有量には制限はなく、例えば、バイ
ンダの含有量は１〜５重量％、溶剤の含有量は１０〜５
０重量％程度の範囲で設定することができる。また、ペ
ースト中には、必要に応じて各種分散剤、可塑剤、誘電
体、絶縁体等を１０重量％以下の範囲で含有させること
ができる。The contents of the binder and the solvent in the magnetic ferrite layer paste are not limited. For example, the content of the binder is 1 to 5% by weight and the content of the solvent is 10 to 5%.
It can be set in the range of about 0% by weight. In the paste, if necessary, various dispersants, plasticizers, dielectrics, insulators, and the like can be contained in a range of 10% by weight or less.

【００２５】また、磁性フェライト層２は、磁性フェラ
イト層用シートを用いて形成することもできる。すなわ
ち、本発明の磁性フェライト材料を得るためのＦｅ2 Ｏ
3 、ＮｉＯ、ＣｕＯおよびＺｎＯを主成分とした仮焼成
粉と、ＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏのガラス成分
の各粉体とを、ポリビニルブチラールを主成分としたバ
インダとトルエン、キシレン等の溶媒とともにボールミ
ル中で混練してスラリーを調製し、このスラリーをポリ
エステルフィルム等の上にドクターブレード法等で塗布
し乾燥して磁性フェライト層用シートを得る。この磁性
フェライト層用シートを、内部電極用ペーストと交互に
積層した後、焼成する。The magnetic ferrite layer 2 can be formed using a magnetic ferrite layer sheet. That is, Fe 2 O for obtaining the magnetic ferrite material of the present invention.
3 , a calcined powder mainly composed of NiO, CuO and ZnO, and powders of glass components of SiO 2 , B 2 O 3 and Na 2 O, and a binder mainly composed of polyvinyl butyral and toluene, xylene A slurry is prepared by kneading in a ball mill together with such a solvent as described above, and this slurry is applied onto a polyester film or the like by a doctor blade method or the like and dried to obtain a sheet for a magnetic ferrite layer. This magnetic ferrite layer sheet is alternately laminated with the internal electrode paste, and then fired.

【００２６】尚、磁性フェライト層用シート中のバイン
ダの含有量には制限はなく、例えば、１〜５重量％程度
の範囲で設定することができる。また、磁性フェライト
層用シート中には、必要に応じて各種分散剤、可塑剤、
誘電体、絶縁体等を１０重量％以下の範囲で含有させる
ことができる。The content of the binder in the magnetic ferrite layer sheet is not limited, and can be set, for example, in the range of about 1 to 5% by weight. In the magnetic ferrite layer sheet, various dispersants, plasticizers,
Dielectrics, insulators, and the like can be contained in a range of 10% by weight or less.

【００２７】積層型チップインダクタ１を構成する内部
電極３は、インダクタとして実用的な品質係数Ｑを得る
ために抵抗率の小さいＡｇを主体とした導電材を用いて
形成する。内部電極３は、各層が長円形状であり、隣接
する内部電極３の各層は、図２に示されるように、スパ
イラル状に導通が確保されているので、内部電極３は閉
磁路コイル（巻線パターン）を構成し、その両端に外部
電極５，５が接続されている。The internal electrodes 3 constituting the multilayer chip inductor 1 are formed using a conductive material mainly composed of Ag having a small resistivity in order to obtain a practical quality factor Q as an inductor. As shown in FIG. 2, each layer of the internal electrode 3 has an elliptical shape, and each layer of the adjacent internal electrode 3 has a spiral conduction as shown in FIG. ), And external electrodes 5 and 5 are connected to both ends thereof.

【００２８】積層型チップインダクタ１のチップ体４の
外形や寸法には特に制限はなく、用途に応じて適宜設定
することができ、通常、外形はほぼ直方体形状とし、寸
法は１．０〜４．５ｍｍ×０．５〜３．２ｍｍ×０．６
〜１．９ｍｍ程度とすることができる。また、磁性フェ
ライト層２の電極間厚みおよびベース厚みには特に制限
はなく、電極間厚み（内部電極３，３の間隔）は１０〜
１００μｍ、ベース厚みは２５０〜５００μｍ程度で設
定することができる。さらに、内部電極３の厚みは、通
常、５〜３０μｍの範囲で設定でき、巻線パターンのピ
ッチは１０〜１００μｍ程度、巻数は１．５〜２０．５
ターン程度とすることができる。The outer shape and dimensions of the chip body 4 of the multilayer chip inductor 1 are not particularly limited and can be appropriately set according to the application. Usually, the outer shape is substantially a rectangular parallelepiped, and the size is 1.0 to 4 mm. 0.5 mm × 0.5 to 3.2 mm × 0.6
About 1.9 mm. The thickness between the electrodes and the base thickness of the magnetic ferrite layer 2 is not particularly limited, and the thickness between the electrodes (the interval between the internal electrodes 3 and 3) is 10 to 10.
The thickness can be set to about 100 μm and the thickness of the base to about 250 to 500 μm. Further, the thickness of the internal electrode 3 can be usually set in the range of 5 to 30 μm, the pitch of the winding pattern is about 10 to 100 μm, and the number of turns is 1.5 to 20.5.
It can be around a turn.

【００２９】磁性フェライト層用ペーストあるいはシー
トと内部電極用ペーストとを交互に印刷積層した後の焼
成時の温度は、８００〜９３０℃、好ましくは８５０〜
９００℃とする。焼成温度が８００℃未満であると焼成
不足となり、一方、９３０℃を超えるとフェライト材料
中に内部電極材料が拡散して、電磁気特性を著しく低下
させることがある。また、焼成時間は０．０５〜５時
間、好ましくは０．１〜３時間の範囲で設定することが
できる。The firing temperature after alternately printing and laminating the magnetic ferrite layer paste or sheet and the internal electrode paste is 800 to 930 ° C., preferably 850 to 850 ° C.
900 ° C. If the sintering temperature is lower than 800 ° C., the sintering becomes insufficient. On the other hand, if the sintering temperature exceeds 930 ° C., the internal electrode material diffuses into the ferrite material, so that the electromagnetic characteristics may be significantly reduced. The firing time can be set in the range of 0.05 to 5 hours, preferably 0.1 to 3 hours.

【００３０】尚、磁性フェライト層２中のＦｅ2 Ｏ3 、
ＮｉＯ、ＣｕＯおよびＺｎＯの主成分組成の分析、Ｓｉ
Ｏ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏのガラス成分の分析は、
ガラスビート法による蛍光Ｘ線分析で測定することがで
きる。It should be noted that Fe 2 O 3 in the magnetic ferrite layer 2
Analysis of main component composition of NiO, CuO and ZnO, Si
The analysis of the glass components of O 2 , B 2 O 3 and Na 2 O
It can be measured by X-ray fluorescence analysis using the glass beat method.

【００３１】複合積層型部品 本発明の複合積層型部品は、本発明の磁性フェライト材
料で構成されたフェライト磁性層と内部電極とを積層し
たチップフェライト部やフェライト部を有するものであ
る。 Composite Laminated Component The composite laminated component of the present invention has a chip ferrite portion or a ferrite portion in which a ferrite magnetic layer composed of the magnetic ferrite material of the present invention and internal electrodes are laminated.

【００３２】図３は、本発明の複合積層型部品の一実施
形態であるＬＣ複合積層型部品の一例を示す概略断面図
である。図３において、ＬＣ複合積層型部品１１は、チ
ップコンデンサ部１２とチップフェライト部１３とを一
体化したものであり、この端部には外部電極１５，１５
が設けられている。FIG. 3 is a schematic sectional view showing an example of an LC composite laminated component which is an embodiment of the composite laminated component of the present invention. In FIG. 3, an LC composite laminated component 11 is one in which a chip capacitor portion 12 and a chip ferrite portion 13 are integrated, and external electrodes 15, 15
Is provided.

【００３３】チップコンデンサ部１２は、セラミック誘
電体層２１と内部電極２２とが交互に積層一体化された
多層構造を有する。The chip capacitor section 12 has a multilayer structure in which ceramic dielectric layers 21 and internal electrodes 22 are alternately laminated and integrated.

【００３４】セラミック誘電体層２１としては特に制限
はなく、種々の誘電体材料を用いることができ、焼成温
度が低い酸化チタン系誘電体が好ましい。また、チタン
酸系複合酸化物、ジルコン酸系複合酸化物、あるいは、
これらの混合物を使用することもできる。さらに、焼成
温度を下げるために、硼珪酸ガラス等の各種ガラスが含
有されてもよい。The ceramic dielectric layer 21 is not particularly limited, and various dielectric materials can be used, and a titanium oxide dielectric having a low firing temperature is preferable. In addition, titanate-based composite oxide, zirconate-based composite oxide, or
Mixtures of these can also be used. Further, various glasses such as borosilicate glass may be contained in order to lower the firing temperature.

【００３５】また、内部電極２２は、抵抗率の小さいＡ
ｇを主体とした導電材を用いて形成されており、内部電
極２２の各層は、交互に別の外部電極に接続されてい
る。The internal electrode 22 is made of A having a small resistivity.
It is formed using a conductive material mainly composed of g, and each layer of the internal electrode 22 is alternately connected to another external electrode.

【００３６】チップフェライト部１３は、積層型チップ
インダクタであり、フェライト磁性層３２と内部電極３
３とが交互に積層一体化された多層構造のチップ体であ
る。The chip ferrite section 13 is a multilayer chip inductor, and includes a ferrite magnetic layer 32 and an internal electrode 3.
Reference numeral 3 denotes a chip body having a multilayer structure alternately stacked and integrated.

【００３７】フェライト磁性層３２は、本発明の磁性フ
ェライト材料で構成されたものである。すなわち、本発
明の磁性フェライト材料を得るためのＦｅ2 Ｏ3 、Ｎｉ
Ｏ、ＣｕＯおよびＺｎＯを主成分とした仮焼成粉と、Ｓ
ｉＯ2 、Ｂ2 Ｏ3 およびＮａ 2 Ｏのガラス成分の各粉体
とを、エチルセルロース等のバインダとテルピネオー
ル、ブチルカルビトール等の溶剤とともに混練してフェ
ライト磁性層用ペーストを調製し、このフェライト磁性
層用ペーストを、内部電極用ペーストと交互に印刷積層
した後、焼成して形成することができる。あるいは、本
発明の磁性フェライト材料を得るためのＦｅ2 Ｏ3 、Ｎ
ｉＯ、ＣｕＯおよびＺｎＯを主成分とした仮焼成粉と、
ＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏのガラス成分の各粉
体とを、ポリビニルブチラールを主成分としたバインダ
とトルエン、キシレン等の溶媒とともにボールミル中で
混練してスラリーを調製し、このスラリーをポリエステ
ルフィルム等の上にドクターブレード法等で塗布し乾燥
して得たフェライト磁性層用シートを、内部電極用ペー
ストと交互に積層した後、焼成して形成することができ
る。The ferrite magnetic layer 32 is made of the magnetic film of the present invention.
It is composed of ferrite material. That is,
Fe for obtaining bright magnetic ferrite materialTwo OThree , Ni
A calcined powder containing O, CuO and ZnO as main components;
iOTwo , BTwo OThree And Na Two Each powder of O glass component
And a binder such as ethyl cellulose and terpineau
And butyl carbitol.
Prepare a paste for the write magnetic layer,
Layer paste is alternately printed and laminated with internal electrode paste
After that, it can be formed by firing. Or a book
Fe for obtaining the magnetic ferrite material of the inventionTwo OThree , N
a calcined powder containing iO, CuO and ZnO as main components;
SiOTwo , BTwo OThree And NaTwo Each powder of O glass component
Body and a binder containing polyvinyl butyral as the main component
And a solvent such as toluene and xylene in a ball mill
A slurry is prepared by kneading, and this slurry is
And dried on doctor film by doctor blade method etc.
The ferrite magnetic layer sheet obtained in
After alternately laminating with the strike, it can be formed by firing
You.

【００３８】また、内部電極３３はスパイラル状に導通
が確保されて閉磁路コイル（巻線パターン）を構成し、
その両端は外部電極１５，１５に接続されている。この
内部電極３３は、抵抗率の小さいＡｇを主体とした導電
材を用いて形成される。The internal electrodes 33 are spirally conductive and form a closed magnetic circuit coil (winding pattern).
Both ends are connected to external electrodes 15 and 15. The internal electrode 33 is formed using a conductive material mainly composed of Ag having a small resistivity.

【００３９】チップフェライト部１３のフェライト磁性
層３２の電極間厚みおよびベース厚みには特に制限はな
く、電極間厚み（内部電極３３，３３の間隔）は１０〜
１００μｍ、ベース厚みは１００〜５００μｍ程度で設
定することができる。さらに、内部電極３３の厚みは、
通常、５〜３０μｍの範囲で設定でき、巻線パターンの
ピッチは１０〜４００μｍ程度、巻数は１．５〜５０．
５ターン程度とすることができる。The thickness between the electrodes and the base thickness of the ferrite magnetic layer 32 of the chip ferrite portion 13 are not particularly limited, and the thickness between the electrodes (the interval between the internal electrodes 33, 33) is 10 to 10.
The thickness can be set to about 100 μm, and the base thickness can be set to about 100 to 500 μm. Furthermore, the thickness of the internal electrode 33 is
Usually, it can be set in the range of 5 to 30 μm, the pitch of the winding pattern is about 10 to 400 μm, and the number of turns is 1.5 to 50.
It can be about 5 turns.

【００４０】本発明のＬＣ複合積層型部品１１の外形や
寸法には特に制限はなく、用途に応じて適宜設定するこ
とができ、通常、外形はほぼ直方体形状とし、寸法は
１．６〜１０．０ｍｍ×０．８〜１５．０ｍｍ×１．０
〜５．０ｍｍ程度とすることができる。The external shape and dimensions of the LC composite laminated component 11 of the present invention are not particularly limited, and can be appropriately set according to the application. Usually, the external shape is substantially a rectangular parallelepiped, and the size is 1.6 to 10 mm. 0.0 mm × 0.8 to 15.0 mm × 1.0
About 5.0 mm.

【００４１】尚、フェライト磁性層３２中のＦｅ2 Ｏ
3 、ＮｉＯ、ＣｕＯおよびＺｎＯの主成分組成の分析、
ＳｉＯ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏのガラス成分の分析
は、ガラスビート法による蛍光Ｘ線分析で測定すること
ができる。The Fe 2 O in the ferrite magnetic layer 32
3 , analysis of the main component composition of NiO, CuO and ZnO,
The analysis of the glass components of SiO 2 , B 2 O 3 and Na 2 O can be measured by X-ray fluorescence analysis using a glass beet method.

【００４２】また、ＬＣ複合積層型部品以外のトランス
複合積層型部品等の場合も、上記と同様に本発明の磁性
フェライト材料を用いて作製することができる。Also, in the case of a transformer composite laminated type component other than the LC composite laminated type component, it can be manufactured using the magnetic ferrite material of the present invention in the same manner as described above.

【００４３】[0043]

【実施例】次に、具体的な実施例を挙げて本発明を更に
詳細に説明する。 ［磁性フェライト材料の作製］まず、Ｆｅ2 Ｏ3 、Ｎｉ
Ｏ、ＣｕＯおよびＺｎＯの各成分を下記の製造条件で配
合、仮焼成、粉砕して仮焼成粉（Ｆｅ2 Ｏ3 ：４９．５
モル％、ＮｉＯ：８．５モル％、ＣｕＯ：１１．０モル
％、ＺｎＯ：３１．０モル％の組成）を調製した。製造条件 ・配合及び粉砕用ポット ： ４インチ、ステンレスボ
ールミルポット ・配合及び粉砕用メディア： １／８インチスチールボ
ール８００ｇ ・配合時間 ： １０時間 ・粉砕時間 ： ６０時間 ・仮焼成条件 ： ７００℃、４時間Next, the present invention will be described in more detail with reference to specific examples. [Preparation of Magnetic Ferrite Material] First, Fe 2 O 3 , Ni
Each component of O, CuO and ZnO is blended, calcined, and pulverized under the following production conditions to prepare a calcined powder (Fe 2 O 3 : 49.5).
Mol%, NiO: 8.5 mol%, CuO: 11.0 mol%, ZnO: 31.0 mol%). Manufacturing conditions -Mixing and grinding pot: 4 inch, stainless steel ball mill pot-Mixing and grinding media: 1/8 inch steel ball 800g-Mixing time: 10 hours-Grinding time: 60 hours-Pre-baking conditions: 700 ° C, 4 time

【００４４】次に、各仮焼成粉にガラス成分としてＳｉ
Ｏ2 、Ｂ2 Ｏ3 およびＮａ2 Ｏの３成分、あるいは、Ｓ
ｉＯ2 およびＢ2 Ｏ3 の２成分を加えて、９種の混合粉
体を作製した。これにポリビニルアルコール６％水溶液
を１０重量％添加し、その後、トロイダル（外径１１．
１ｃｍ、内径５．１ｃｍ、厚み２．４ｃｍ）に成形し、
９００℃で２時間の焼成を行って磁性フェライト材料
（実施例１〜５、比較例１〜４）を得た。得られた９種
の磁性フェライト材料について、ガラスビート法による
蛍光Ｘ線分析で、Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺ
ｎＯからなる主成分に対するＳｉＯ2 、Ｂ2 Ｏ3 、Ｎａ
2 Ｏの各含有量を分析して結果を下記の表１に示した。Next, Si was added to each of the calcined powders as a glass component.
Three components of O 2 , B 2 O 3 and Na 2 O, or S
Nine kinds of mixed powders were prepared by adding two components of iO 2 and B 2 O 3 . 10% by weight of a 6% aqueous solution of polyvinyl alcohol was added thereto, and then toroidal (outer diameter of 11.
1cm, inner diameter 5.1cm, thickness 2.4cm)
Firing was performed at 900 ° C. for 2 hours to obtain magnetic ferrite materials (Examples 1 to 5 and Comparative Examples 1 to 4). The obtained nine magnetic ferrite materials were analyzed by X-ray fluorescence spectroscopy using the glass beet method to find out Fe 2 O 3 , NiO, CuO and Z
SiO 2 , B 2 O 3 , Na with respect to the main component consisting of nO
The content of 2 O was analyzed and the results are shown in Table 1 below.

【００４５】さらに、得られた磁性フェライト材料（実
施例１〜５、比較例１〜４）の結晶粒径、透磁率μを下
記の方法で測定して、結果を下記の表１に示した。結晶粒径の測定方法 トロイダル形状の磁性フェライト材料を鏡面研磨し、フ
ッ酸によりエッチングを施し、電子顕微鏡を用いて５０
００倍程度の写真を撮り、この写真上で任意の一定方向
の２平行線が粒子に外接するときの距離を計測し、この
計測を１００個の粒子について行い、その平均値を算出
して結晶粒径とする。透磁率μの測定方法 トロイダル形状の磁性フェライト材料に銅製ワイヤー
（線径０．３５ｍｍ）を２０ターン巻き、測定周波数１
００ＫＨｚ、測定電流０．５ｍＡでＬＣＲメーター（ヒ
ューレットパッカー（株）製）を用いてインダクタンス
を測定し、下記の式を用いて透磁率μを算出する。 透磁率μ＝（ｌe ×Ｌ）／（μ0 ×Ａe ×Ｎ2 ） ｌe ：磁路長 Ｌ：試料のインダクタンス μ0 ：真空の透磁率＝４π×１０-7（Ｈ／ｍ） Ａe ：試料の断面積 Ｎ：コイルの巻数Further, the crystal grain size and the magnetic permeability μ of the obtained magnetic ferrite materials (Examples 1 to 5 and Comparative Examples 1 to 4) were measured by the following methods, and the results are shown in Table 1 below. . Measurement method of crystal grain size The toroidal magnetic ferrite material is mirror-polished, etched with hydrofluoric acid, and treated with an electron microscope.
Take a photograph of about 00 times, measure the distance when two parallel lines in any given direction circumscribe the particles on this photograph, perform this measurement for 100 particles, calculate the average value, and calculate the average value. Let it be the particle size. Measurement method of magnetic permeability μ A toroidal magnetic ferrite material is wound around a copper wire (wire diameter 0.35 mm) for 20 turns, and the measurement frequency is 1
The inductance is measured using an LCR meter (manufactured by Hewlett-Packer Co., Ltd.) at 00 KHz and a measurement current of 0.5 mA, and the magnetic permeability μ is calculated using the following equation. Magnetic permeability μ = (le × L) / (μ 0 × Ae × N 2 ) le: magnetic path length L: inductance of sample μ 0 : magnetic permeability of vacuum = 4π × 10 −7 (H / m) Ae: sample N: Number of coil turns

【００４６】［積層型チップフェライト部品の作製］上
記の９種の混合粉体を用い、各混合粉体１００重量部に
対して、エチルセルロース２．５重量部、テルピネオー
ル４０重量部を加え、３本ロールにて混練して磁性フェ
ライト層用ペーストを調製した。一方、平均粒径０．８
μｍのＡｇ１００重量部に対して、エチルセルロース
２．５重量部、テルピネオール４０重量部を加え、３本
ロールにて混練して、内部電極用ペーストを調製した。
このような磁性フェライト層用ペーストと内部電極用ペ
ーストを交互に印刷積層した後、９００℃で２時間の焼
成を行って図１および図２に示されるような積層型チッ
プインダクタ（実施例１〜５、比較例１〜４）を得た。
これらの積層型チップインダクタの寸法は２．０ｍｍ×
１．２ｍｍ×０．８５ｍｍであり、巻数は３．５ターン
とした。次いで、上記の積層型チップインダクタの端部
に外部電極を約６００℃で焼き付けて形成し、測定周波
数１００ＫＨｚ、測定電流０．２ｍＡでＬＣＲメーター
（ヒューレットパッカー（株）製）を用いてインダクタ
ンスＬを測定し、結果を下記の表１に示した。[Preparation of Laminated Chip Ferrite Parts] Using the above nine kinds of mixed powder, 2.5 parts by weight of ethyl cellulose and 40 parts by weight of terpineol were added to 100 parts by weight of each mixed powder, and three parts were added. The mixture was kneaded with a roll to prepare a magnetic ferrite layer paste. On the other hand, the average particle size is 0.8
2.5 parts by weight of ethyl cellulose and 40 parts by weight of terpineol were added to 100 parts by weight of Ag of μm, and kneaded with a three-roll mill to prepare an internal electrode paste.
After alternately printing and laminating such a paste for a magnetic ferrite layer and a paste for an internal electrode, the paste was fired at 900 ° C. for 2 hours to obtain a laminated chip inductor as shown in FIGS. 5, Comparative Examples 1-4) were obtained.
The dimensions of these multilayer chip inductors are 2.0 mm x
It was 1.2 mm x 0.85 mm and the number of turns was 3.5 turns. Then, an external electrode is formed by baking at an end of the above-mentioned multilayer chip inductor at about 600 ° C., and the inductance L is measured using an LCR meter (manufactured by Hewlett-Packer Co., Ltd.) at a measurement frequency of 100 KHz and a measurement current of 0.2 mA. The measurement was performed and the results are shown in Table 1 below.

【００４７】また、上記と同様にして磁性フェライト層
用ペーストを調製し、このペーストと、上記の内部電極
用ペーストとを使用して、２０１２タイプの積層型チッ
プビーズ（実施例１〜５、比較例１〜４）を得た。焼成
は９００℃、２時間とし、巻数は３．５ターンとした。
次いで、上記の積層型チップビーズの端部に外部電極を
約６００℃で焼き付けて形成し、インピーダンズアナラ
イザー（ヒューレットパッカー（株）製）を用いて測定
電流０．２ｍＡでインピーダンスＺ、リアクタンスＸ、
レジスタンスＲの周波数特性を測定し、測定周波数１Ｍ
ＨｚにおけるレジスタンスＲの測定結果を下記の表１に
示した。A paste for a magnetic ferrite layer was prepared in the same manner as described above, and this type of paste and the paste for an internal electrode were used to form a 2012 type laminated chip bead (Examples 1 to 5; Examples 1 to 4) were obtained. The firing was performed at 900 ° C. for 2 hours and the number of turns was 3.5 turns.
Next, an external electrode is formed by baking at an end of the above-mentioned laminated chip beads at about 600 ° C., and the impedance Z, the reactance X, and the impedance Z are measured at a measurement current of 0.2 mA using an impedance analyzer (manufactured by Hewlett-Packer, Inc.).
Measure the frequency characteristics of the resistance R and measure the frequency at 1M.
The measurement results of the resistance R in Hz are shown in Table 1 below.

【００４８】[0048]

【表１】 表１に示されるように、Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯお
よびＺｎＯを主成分とし、ガラス成分としてＳｉＯ2 、
Ｂ2 Ｏ3 およびＮａ2 Ｏの３成分を含有し、かつ、磁性
フェライトの結晶粒径が３〜５０μｍの範囲内にある磁
性フェライト材料（実施例１〜５）は、透磁率が１５０
０を超えることが確認された。また、この磁性フェライ
ト材料で構成された磁性フェライト層を備える積層型チ
ップインダクタ（実施例１〜５）は、５μＨ以上の非常
に高いインダクタンスＬを有することが確認された。さ
らに、上記の磁性フェライト材料で構成された磁性フェ
ライト層を備える積層型チップビーズ（実施例１〜５）
の測定周波数１ＭＨｚにおけるレジスタンスＲ（吸収成
分）は、３５Ω以上と大きいものであった。[Table 1] As shown in Table 1, Fe 2 O 3 , NiO, CuO, and ZnO were the main components, and SiO 2 ,
A magnetic ferrite material (Examples 1 to 5) containing three components of B 2 O 3 and Na 2 O and having a crystal grain size of the magnetic ferrite in the range of 3 to 50 μm has a magnetic permeability of 150.
It was confirmed that it exceeded 0. In addition, it was confirmed that the multilayer chip inductors (Examples 1 to 5) provided with the magnetic ferrite layer composed of the magnetic ferrite material had a very high inductance L of 5 μH or more. Further, a multilayer chip bead provided with a magnetic ferrite layer composed of the above magnetic ferrite material (Examples 1 to 5)
The resistance R (absorption component) at a measurement frequency of 1 MHz was as large as 35 Ω or more.

【００４９】これに対して、ガラス成分を含有しない場
合（比較例１）は、磁性フェライトの結晶粒径が２μｍ
であり、磁性フェライト材料の透磁率は１０００程度と
低いものであった。また、ガラス成分としてＳｉＯ2 、
Ｂ2 Ｏ3 の２成分を含有させたのみでＮａ2 Ｏを含有し
ない場合（比較例２〜４）、磁性フェライトの結晶粒径
は大きくなるものの、未だ３μｍ未満であり、磁性フェ
ライト材料の透磁率、積層型チップインダクタのインダ
クタンスＬ、および、積層型チップビーズのレジスタン
スＲは、いずれも上記の実施例１〜５に比べて低いもの
であった。On the other hand, when no glass component was contained (Comparative Example 1), the crystal grain size of the magnetic ferrite was 2 μm.
The magnetic permeability of the magnetic ferrite material was as low as about 1000. Further, SiO 2 as a glass component,
When only two components of B 2 O 3 were contained and Na 2 O was not contained (Comparative Examples 2 to 4), the crystal grain size of the magnetic ferrite was large, but still less than 3 μm, and the permeability of the magnetic ferrite material was small. The magnetic susceptibility, the inductance L of the multilayer chip inductor, and the resistance R of the multilayer chip beads were all lower than those in Examples 1 to 5.

【００５０】[0050]

【発明の効果】以上詳述したように、本発明によればＮ
ｉＣｕＺｎフェライト材料中に特定のガラス成分を含有
させることにより、焼成時の結晶粒成長が促進され、磁
性フェライトの結晶粒径が３〜５０μｍの範囲となるの
で、磁性フェライト材料の透磁率が高いものとなり、こ
のような磁性フェライト材料で構成された磁性フェライ
ト層を備える積層型チップインダクタは、非常に高いイ
ンダクタンスＬをもち、従来品に比べ同等の取得インダ
クタンスＬの設計の場合、巻数が低減され、小型化や低
背化が可能となり、また、本発明の磁性フェライト材料
で構成された磁性フェライト層を備える積層型チップビ
ーズは、反射成分（リアクタンス）が小さく、吸収成分
（レジスタンス）が大きく、かつ、両者の交点が低周波
側にシフトするので、従来に比べて高い吸収特性を備え
たものとなり、さらに、本発明の磁性フェライト材料で
構成されたフェライト磁性層と内部電極とを積層したチ
ップフェライト部を有する複合積層型部品は、高密度
化、高特性化が可能となる。As described above in detail, according to the present invention, N
Inclusion of a specific glass component in the iCuZn ferrite material promotes crystal grain growth during firing, and the crystal grain size of the magnetic ferrite is in the range of 3 to 50 μm, so that the magnetic permeability of the magnetic ferrite material is high. Thus, a multilayer chip inductor having a magnetic ferrite layer made of such a magnetic ferrite material has a very high inductance L, and in the case of a design with an acquired inductance L equivalent to that of a conventional product, the number of turns is reduced. The multilayer chip beads having a magnetic ferrite layer composed of the magnetic ferrite material of the present invention have a small reflection component (reactance), a large absorption component (resistance), and can be reduced in size and height. Since the intersection of the two shifts to the lower frequency side, it has higher absorption characteristics than the conventional one, , The composite multilayer type component having a chip ferrite portion and a magnetic ferrite material ferrite magnetic layer composed of the internal electrodes were laminated in this invention, high density, it is possible to highly characterization.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の積層型チップフェライト部品の一実施
形態である積層型チップインダクタの一例を示す概略断
面図である。FIG. 1 is a schematic sectional view showing an example of a multilayer chip inductor which is an embodiment of a multilayer chip ferrite component of the present invention.

【図２】図１に示される積層型チップインダクタの平面
部分断面図である。FIG. 2 is a partial plan sectional view of the multilayer chip inductor shown in FIG. 1;

【図３】本発明の複合積層型部品の一実施形態であるＬ
Ｃ複合積層型部品の一例を示す概略断面図である。FIG. 3 is an embodiment of a composite laminated component according to the present invention;
It is an outline sectional view showing an example of C compound lamination type parts.

【符号の説明】[Explanation of symbols]

１…積層型チップインダクタ ２…磁性フェライト層 ３…内部電極 ４…チップ体 ５，５…外部電極 １１…ＬＣ複合積層型部品 １２…チップコンデンサ部 １３…チップフェライト部 １５，１５…外部電極 ２１…セラミック誘電体層 ２２…内部電極 ３２…フェライト磁性層 ３３…内部電極 DESCRIPTION OF SYMBOLS 1 ... Laminated chip inductor 2 ... Magnetic ferrite layer 3 ... Internal electrode 4 ... Chip 5,5 ... External electrode 11 ... LC composite laminated type component 12 ... Chip capacitor part 13 ... Chip ferrite part 15,15 ... External electrode 21 ... Ceramic dielectric layer 22 ... internal electrode 32 ... ferrite magnetic layer 33 ... internal electrode

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎ
Ｏを主成分とし、ガラス成分として少なくともＳｉＯ
2 、Ｂ2 Ｏ3 およびＮａ2 Ｏを含有し、磁性フェライト
の結晶粒径が３〜５０μｍの範囲であることを特徴とす
る磁性フェライト材料。1. A Fe 2 O 3, NiO, CuO and Zn
O as a main component and at least SiO 2 as a glass component
2, B 2 O 3, and containing Na 2 O, the magnetic ferrite material, wherein the grain size of magnetic ferrite is in the range of 3 to 50 [mu] m. 【請求項２】 Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎ
Ｏからなる主成分に対して、ＳｉＯ2 、Ｂ2 Ｏ3 および
Ｎａ2 Ｏからなるガラス成分が総量で８０〜２０００ｐ
ｐｍの範囲で含有されることを特徴とする請求項１に記
載の磁性フェライト材料。2. Fe 2 O 3 , NiO, CuO and Zn
The glass component composed of SiO 2 , B 2 O 3 and Na 2 O is 80 to 2000 p in total with respect to the main component composed of O.
The magnetic ferrite material according to claim 1, wherein the magnetic ferrite material is contained in the range of pm. 【請求項３】 前記ガラス成分に占めるＮａ2 Ｏ量は、
１〜２０重量％の範囲内であることを特徴とする請求項
２に記載の磁性フェライト材料。3. The amount of Na 2 O in the glass component is:
The magnetic ferrite material according to claim 2, wherein the content is in the range of 1 to 20% by weight. 【請求項４】 Ｆｅ2 Ｏ3 、ＮｉＯ、ＣｕＯおよびＺｎ
Ｏの組成は、Ｆｅ2Ｏ3 ：４９〜５０モル％、ＮｉＯ：
６〜１３モル％、ＣｕＯ：６〜１４モル％、ＺｎＯ：２
８〜３３モル％の範囲内にあることを特徴とする請求項
１乃至請求項３のいずれかに記載の磁性フェライト材
料。4. Fe 2 O 3 , NiO, CuO and Zn
O of composition, Fe 2 O 3: 49~50 mol%, NiO:
6 to 13 mol%, CuO: 6 to 14 mol%, ZnO: 2
The magnetic ferrite material according to any one of claims 1 to 3, wherein the content is in the range of 8 to 33 mol%. 【請求項５】 磁性フェライト層と内部電極とを多層積
層して構成される積層型チップフェライト部品におい
て、 前記磁性フェライト層は請求項１乃至請求項４のいずれ
かに記載の磁性フェライト材料で構成されていることを
特徴とする積層型チップフェライト部品。5. A multilayer chip ferrite component comprising a magnetic ferrite layer and internal electrodes laminated in multiple layers, wherein the magnetic ferrite layer is made of the magnetic ferrite material according to any one of claims 1 to 4. A multilayer chip ferrite component characterized by being made. 【請求項６】 フェライト磁性層と内部電極とを積層し
て構成されるチップフェライト部を有するＬＣ複合積層
型部品において、 前記フェライト磁性層は請求項１乃至請求項４のいずれ
かに記載の磁性フェライト材料で構成されていることを
特徴とするＬＣ複合積層型部品。6. An LC composite laminated component having a chip ferrite portion formed by laminating a ferrite magnetic layer and an internal electrode, wherein the ferrite magnetic layer is a magnetic material according to any one of claims 1 to 4. An LC composite laminated component comprising a ferrite material. 【請求項７】 フェライト磁性層と内部電極とを積層し
て構成されるフェライト部を有するトランス複合積層型
部品において、 前記フェライト磁性層は請求項１乃至請求項４のいずれ
かに記載の磁性フェライト材料で構成されていることを
特徴とするトランス複合積層型部品。7. A transformer composite laminated component having a ferrite portion formed by laminating a ferrite magnetic layer and an internal electrode, wherein the ferrite magnetic layer is any one of claims 1 to 4. A transformer-composite laminated part characterized by being composed of a material.
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JP2002260914A (en) * 2001-03-01 2002-09-13 Tdk Corp Sintered magnetic oxide and high-frequency circuit part using the same
JP2002260912A (en) * 2001-03-01 2002-09-13 Tdk Corp Sintered magnetic oxide and high-frequency circuit part using the same
CN100338696C (en) * 2003-08-26 2007-09-19 奇力新电子股份有限公司 Lead-free flux composition for low-temp sintering Ni Zn ferrimagnet
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