JPH02288307A - Magnetic material for layer-built inductor - Google Patents
Magnetic material for layer-built inductorInfo
- Publication number
- JPH02288307A JPH02288307A JP1109778A JP10977889A JPH02288307A JP H02288307 A JPH02288307 A JP H02288307A JP 1109778 A JP1109778 A JP 1109778A JP 10977889 A JP10977889 A JP 10977889A JP H02288307 A JPH02288307 A JP H02288307A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- borosilicate glass
- ferrite
- laminated inductor
- magnetic
- 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.)
- Pending
Links
- 239000000696 magnetic material Substances 0.000 title claims abstract description 22
- 239000005388 borosilicate glass Substances 0.000 claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 4
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Coils Or Transformers For Communication (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、積層インダクタに用いられる磁性体材料に係
るもので、特に１００ＭＩＩｚ以上の高周波帯域での利
用に適した、低誘電率の磁性体材料に関するものである
。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a magnetic material used in a laminated inductor, and in particular a magnetic material with a low dielectric constant suitable for use in a high frequency band of 100 MIIz or higher. It's about materials.
電子部品の薄形化、小形化等の要求に伴って、インダク
タの分野においても、巻線を用いずに、フェライトの磁
性体内に周回する導体パターンを具えた積層インダクタ
が用いられるようになっている。With the demand for thinner and more compact electronic components, the field of inductors has started to use multilayer inductors that do not use windings but instead have a conductor pattern circulating inside a ferrite magnetic body. There is.
この積層インダクタは、磁性体セラミックグリーンシー
トに導体パターンを形成し、導体パターンを接続しなが
ら積層するものと、フェライトの磁性体ペーストと銀な
どの導体ペーストを交互に印刷して積層するものがあり
、いずれも焼成され、端子電極が形成されて完成する。There are two types of laminated inductors: one in which a conductor pattern is formed on a magnetic ceramic green sheet and then laminated while connecting the conductor patterns, and another in which a magnetic paste of ferrite and a conductor paste such as silver are alternately printed and laminated. , both are fired and terminal electrodes are formed and completed.
この積層インダクタは、これまでは、主として１００Ｍ
Ｈｚ以下の周波数帯域で用いられていたが、１００ＭＨ
ｚを超える高周波領域でも利用できることが望まれてい
る。Until now, this laminated inductor was mainly 100M
It was used in the frequency band below Hz, but 100MHz
It is desired that it can be used even in a high frequency region exceeding z.
しかし、積層インダクタは薄い絶縁層を介して導体パタ
ーンが近接して形成されるため、浮遊容量が大きくなっ
て自己共振周波数が低い値に留まってしまい、数百ＭＨ
２の高周波帯域には適してなかった。However, since the conductor patterns of multilayer inductors are formed close to each other through a thin insulating layer, the stray capacitance becomes large and the self-resonant frequency remains at a low value, resulting in several hundred MHz.
It was not suitable for the high frequency band of 2.
本発明は、１００Ｍ１１２を超える高周波帯域に適した
積層インダクタを得ようとするもので、高い自己共振周
波数を得ることのできる積層インダクク用の材料を提供
するものである。The present invention aims to obtain a laminated inductor suitable for a high frequency band exceeding 100M112, and provides a material for the laminated inductor that can obtain a high self-resonant frequency.
本発明は、フェライト、特にニッケルフェライトにホウ
ケイ酸ガラスを混合した磁性体材料を用いることによっ
て、上記の課題を解決するものである。The present invention solves the above problems by using a magnetic material in which borosilicate glass is mixed with ferrite, particularly nickel ferrite.
すなわち、内部に周回する導体パターンを具えた積層イ
ンダクタを印刷法で製造するためのセラミック磁性体ペ
ーストとなる積層インダクク用磁性体材料において、該
セラミック磁性体はフェライトにホウケイ酸ガラスを添
加して成ることに特徴を有するものである。That is, in a magnetic material for a laminated inductor that is a ceramic magnetic paste for manufacturing a laminated inductor with a conductor pattern circulating therein by a printing method, the ceramic magnetic material is made by adding borosilicate glass to ferrite. It has particular characteristics.
印刷用ペーストだけでなく、磁性体のセラミックグリー
ンシート用材料としても用いることができる。It can be used not only as a printing paste but also as a material for magnetic ceramic green sheets.
（作用〕
ツーエライトにホウケイ酸ガラスを混合することによっ
て、セラミック磁性体の誘電率を下げることができる。(Function) By mixing borosilicate glass with two-elite, the dielectric constant of the ceramic magnetic material can be lowered.
これによって、導体パターン間の浮遊容量を減少させる
ことが可能となる。This makes it possible to reduce stray capacitance between conductor patterns.
ただし、他の機械的な特性、電気的な特性を損なわない
範囲で添加量を決める必要はある。However, it is necessary to determine the amount added within a range that does not impair other mechanical properties and electrical properties.
以下、本発明の実施例について説明する。 Examples of the present invention will be described below.
ニッケルフェライトとして、ＦｅｚＯ＊が６５．５ｗｔ
χ、ＮｉＯが３４．４ｗｔχの混合比のものを用いた。As nickel ferrite, FezO* is 65.5wt
The mixture ratio of χ and NiO was 34.4wtχ.
ホウケイ酸ガラスとして日本電気硝子社製のＢＯ−９を
用いて、ニッケルフェライトに対して２０ｗｔＸ、３０
−ｔχ、４０−ｔχを添加した三種類のサンプルを作っ
た。それらの、組成と特性は第１表の通りであった。Using BO-9 manufactured by Nippon Electric Glass Co., Ltd. as borosilicate glass, 20wtX and 30%
Three types of samples containing -tχ and 40-tχ were prepared. Their composition and properties are shown in Table 1.
以下に下がっていることが確認された。但し、添加量が
４０−ｔχのものは、ｔａｎ δが２８．７％と大きく
なっており、使用に適さなくなっている。It was confirmed that the value was below. However, when the amount added is 40-tχ, tan δ is as large as 28.7%, making it unsuitable for use.
上記のホウケイ酸ガラスを含む磁性体材料ペーストを用
いて積層インダクタを製造したときの特性を第２図に示
す。７ターンのものは２５ＭＩＩＺで、その他は５０Ｍ
ＩＩＺで測定した。FIG. 2 shows the characteristics when a laminated inductor was manufactured using the above magnetic material paste containing borosilicate glass. The one with 7 turns is 25 MIIZ, the others are 50 M.
Measured with IIZ.
ホウケイ酸ガラスを加えないフェライトにおいては誘電
率が１６程度であったものが、いずれも工０上記の３タ
ーンあるいは５ターンの導体パターンを形成したもので
も従来品と同等のインダクタンスを示し、かつ自己共振
周波数も高い値となっている。一般に高周波領域ではイ
ンダクタンスは小さくてすむので、少ないターン数で利
用可能なものが得られることが確認された。Ferrite without borosilicate glass had a dielectric constant of about 16, but ferrite with a conductor pattern of 3 turns or 5 turns as described above shows the same inductance as conventional products and has a self-containing property. The resonance frequency is also high. In general, in the high frequency range, inductance is small, so it was confirmed that a usable product could be obtained with a small number of turns.
第１図は表２に示した積層インダクタの周波数とインダ
クタンスの関係を示す説明図である。３ターンのもの（
曲線１１）は高い周波数帯域までフラットな値を示して
いる。また、５ターンのもの（曲線１２）と７ターンの
もの（曲線１３）はインダクタンスが高くなっているこ
とを示している。なお、曲線１４は従来品の特性を示し
ているが、１００ＭＨｚを超えるとインダクタンスの急
激な変化がみられる。FIG. 1 is an explanatory diagram showing the relationship between frequency and inductance of the laminated inductor shown in Table 2. 3 turns (
Curve 11) shows flat values up to high frequency bands. Further, the 5-turn type (curve 12) and the 7-turn type (curve 13) indicate that the inductance is high. Note that although curve 14 shows the characteristics of the conventional product, a rapid change in inductance is observed when the frequency exceeds 100 MHz.
上記の例は、仮焼したニッケルフェライトとガラスを混
合してペーストを作成したが、混合して更に仮焼、粉砕
すると粒子の特性が揃い、安定することも分かった。そ
れによって、コンデンサ等を一体に形成する際に、収縮
率を合わせることも容易となる。In the above example, a paste was created by mixing calcined nickel ferrite and glass, but it was also found that if the mixture was further calcined and crushed, the properties of the particles would be uniform and stable. This makes it easy to match the shrinkage rate when integrally forming a capacitor or the like.
ペースト印刷によって積層体を形成後、温度は約８９０
’ Ｃで焼成することができた。ホウケイ酸ガラスを
添加市内従来のものは１１００°Ｃで焼成しており、焼
成温度を大幅に下げることができた。After forming the laminate by paste printing, the temperature is about 890℃.
' I was able to fire it at C. Conventional products with the addition of borosilicate glass were fired at 1100°C, making it possible to significantly lower the firing temperature.
本発明によれば、高い自己共振周波数を有する積層イン
ダクタが得られ、１００ＭＨｚ以上の周波数帯での利用
に適した積層インダクタが得られる。According to the present invention, a laminated inductor having a high self-resonant frequency can be obtained, and a laminated inductor suitable for use in a frequency band of 100 MHz or higher can be obtained.
また、同じ自己共振周波数であれば、高いインダクタン
スが得られる。Furthermore, if the self-resonance frequency is the same, high inductance can be obtained.
更に、低温で焼成することが可能となり、製造工程の面
でも有利である。Furthermore, it becomes possible to bake at a low temperature, which is advantageous in terms of the manufacturing process.
第１図は本発明による磁性体材料の特性の説明図である
。FIG. 1 is an explanatory diagram of the characteristics of the magnetic material according to the present invention.
Claims (5)
クタを印刷法によって形成するためのセラミック磁性体
ペーストとなる積層インダクタ用磁性材料において、該
セラミック磁性体はフェライトにホウケイ酸ガラスを添
加して成ることを特徴とする積層インダクタ用磁性材料
。(1) In a magnetic material for a laminated inductor that is a ceramic magnetic paste for forming a laminated inductor with a conductor pattern circulating therein by a printing method, the ceramic magnetic substance is made by adding borosilicate glass to ferrite. A magnetic material for multilayer inductors characterized by:
クタを印刷法によって形成するためのセラミック磁性体
ペーストとなる積層インダクタ用磁性材料において、該
セラミック磁性体はニッケルフェライトにホウケイ酸ガ
ラスを添加して成ることを特徴とする積層インダクタ用
磁性材料。(2) In a magnetic material for a laminated inductor that is a ceramic magnetic paste for forming a laminated inductor with a conductor pattern circulating inside by a printing method, the ceramic magnetic substance is made by adding borosilicate glass to nickel ferrite. A magnetic material for multilayer inductors characterized by the following characteristics:
２０〜３０ｗｔ％添加された請求項第２項記載の積層イ
ンダクタ用磁性材料。(3) The magnetic material for a laminated inductor according to claim 2, wherein 20 to 30 wt% of borosilicate glass is added to the nickel ferrite.
クタを形成するためのセラミック磁性体シートとなる積
層インダクタ用磁性材料において、該セラミック磁性体
はフェライトにホウケイ酸ガラスを添加して成ることを
特徴とする積層インダクタ用磁性材料。(4) A magnetic material for a laminated inductor that serves as a ceramic magnetic sheet for forming a laminated inductor having a conductor pattern circulating therein, characterized in that the ceramic magnetic material is made by adding borosilicate glass to ferrite. Magnetic materials for multilayer inductors.
クタを形成するためのセラミック磁性体シートとなる積
層インダクタ用磁性材料において、該セラミック磁性体
はニッケルフェライトにホウケイ酸ガラスを添加して成
ることを特徴とする積層インダクタ用磁性材料。(5) In a magnetic material for a laminated inductor that serves as a ceramic magnetic sheet for forming a laminated inductor with a conductor pattern circulating therein, the ceramic magnetic material is made by adding borosilicate glass to nickel ferrite. Characteristic magnetic materials for multilayer inductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1109778A JPH02288307A (en) | 1989-04-28 | 1989-04-28 | Magnetic material for layer-built inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1109778A JPH02288307A (en) | 1989-04-28 | 1989-04-28 | Magnetic material for layer-built inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02288307A true JPH02288307A (en) | 1990-11-28 |
Family
ID=14518989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1109778A Pending JPH02288307A (en) | 1989-04-28 | 1989-04-28 | Magnetic material for layer-built inductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02288307A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359311A (en) * | 1991-07-08 | 1994-10-25 | Murata Manufacturing Co., Ltd. | Solid inductor with vitreous diffused outer layer |
| US6165379A (en) * | 1998-08-21 | 2000-12-26 | Murata Manufacturing Co., Ltd. | Ferrite sintered compact and electronic part comprising the same |
| JP2002175916A (en) * | 2000-12-07 | 2002-06-21 | Murata Mfg Co Ltd | Inductor |
-
1989
- 1989-04-28 JP JP1109778A patent/JPH02288307A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359311A (en) * | 1991-07-08 | 1994-10-25 | Murata Manufacturing Co., Ltd. | Solid inductor with vitreous diffused outer layer |
| US5551146A (en) * | 1991-07-08 | 1996-09-03 | Murata Manufacturing Co., Ltd. | Method of manufacturing a solid inductor |
| US6165379A (en) * | 1998-08-21 | 2000-12-26 | Murata Manufacturing Co., Ltd. | Ferrite sintered compact and electronic part comprising the same |
| JP2002175916A (en) * | 2000-12-07 | 2002-06-21 | Murata Mfg Co Ltd | Inductor |
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