JPH0642416B2 - Method for producing magnetic material for laminated LC composite component - Google Patents
Method for producing magnetic material for laminated LC composite componentInfo
- Publication number
- JPH0642416B2 JPH0642416B2 JP1196091A JP19609189A JPH0642416B2 JP H0642416 B2 JPH0642416 B2 JP H0642416B2 JP 1196091 A JP1196091 A JP 1196091A JP 19609189 A JP19609189 A JP 19609189A JP H0642416 B2 JPH0642416 B2 JP H0642416B2
- Authority
- JP
- Japan
- Prior art keywords
- laminated
- magnetic material
- composite component
- ferrite
- mixed
- 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.)
- Expired - Lifetime
Links
Landscapes
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、積層ＬＣ複合部品の積層インダクタに用いら
れる磁性材料の製造方法に係るもので、特に100MHz以上
の高周波帯域での利用に適した、低誘電率の磁性材料の
製造方法に関するものである。The present invention relates to a method for producing a magnetic material used for a laminated inductor of a laminated LC composite component, and is particularly suitable for use in a high frequency band of 100 MHz or more. The present invention relates to a method for manufacturing a magnetic material having a low dielectric constant.
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。そして、フィルタ等に
用いるために、積層コンデンサと一体に焼成したＬＣ複
合部品も利用されている。With the demand for thinner and smaller electronic components, the field of inductors has come to be used in the field of inductors as well, without the use of windings. There is. An LC composite component integrally fired with the multilayer capacitor is also used for use as a filter or the like.
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
る。ＬＣ複合部品とする場合には、誘電体材料内に対向
する電極を形成したコンデンサ積層体と一体に焼成さ
れ、端子電極が形成されて完成する。This laminated inductor includes one in which a conductor pattern is formed on a magnetic ceramic green sheet and laminated while connecting the conductor pattern, and one in which a ferrite magnetic paste and a conductor paste such as silver are alternately printed and laminated. . In the case of an LC composite component, it is completed by forming a terminal electrode by firing integrally with a capacitor laminated body in which electrodes facing each other are formed in a dielectric material.
この積層ＬＣ複合部品の積層インダクタは、これまで
は、主として100MHz以下の周波数帯域で用いられていた
が、100MHz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。そのために、ホウケイ酸ガラスを添加した
磁性材料が提案されている。The laminated inductor of this laminated LC composite component has been mainly used up to now in a frequency band of 100 MHz or less, but it is desired that it can also be used in a high frequency region exceeding 100 MHz. Therefore, magnetic materials to which borosilicate glass is added have been proposed.
しかし、積層ＬＣ複合部品の焼成段階でコンデンサ部の
誘電体とインダクタ部の磁性体の収縮率に差があり、剥
離が生じるとともに、ストレスによって電気的な特性の
劣化の原因ともなっていると考えられる。However, it is considered that there is a difference in contraction rate between the dielectric material of the capacitor portion and the magnetic material of the inductor portion during the firing stage of the laminated LC composite component, causing peeling and causing deterioration of electrical characteristics due to stress. .
本発明は、磁性体材料のフェライト材料の製造方法を改
良することによって、誘電体材料との収縮率を整合さ
せ、剥離等の生じない、機械的な強度を改善した磁性体
材料を提供するものである。The present invention provides a magnetic material that improves the mechanical strength by improving the manufacturing method of the ferrite material of the magnetic material so as to match the contraction rate with the dielectric material and prevent peeling or the like. Is.
また、それによって、電気的特性等の安定を図るもので
ある。In addition, it is intended to stabilize the electrical characteristics and the like.
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、フェライトの仮
焼を二段階で行うことによって、上記の課題を解決する
ものである。The present invention solves the above-mentioned problems by calcining ferrite, particularly nickel ferrite, with a magnetic material in which borosilicate glass is mixed in two steps.
すなわち、内部に対向する電極を形成したコンデンサ
と、内部に周回する導体パターンを具えた積層インダク
タを一体に焼成してなる積層ＬＣ複合部品の、積層イン
ダクタを形成するためのセラミック磁性体ペーストとな
る積層ＬＣ複合部品用磁性材料の製造方法において、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
加したものであり、フェライト材料を混合して仮焼した
後に、該フェライト材料とホウケイ酸ガラスを混合して
仮焼した後に粉砕することに特徴を有するものである。That is, it is a ceramic magnetic paste for forming a laminated inductor of a laminated LC composite component obtained by integrally firing a capacitor having electrodes facing each other inside and a laminated inductor having a conductor pattern that circulates inside. In the method for producing a magnetic material for a laminated LC composite component, the ceramic magnetic body is ferrite to which borosilicate glass is added. After the ferrite material is mixed and calcined, the ferrite material and the borosilicate glass are mixed. It is characterized by being calcinated and then crushed.
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.
フェ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て高周波に対応で
きる。更に、フェライト磁性材料を二段階で仮焼するこ
とにより、粒子の微細化、均質化が可能となり、収縮率
の整合や電気的な特性の安定を達成することができる。By mixing borosilicate glass with ferrite, the dielectric constant of the ceramic magnetic material can be lowered to cope with high frequencies. Furthermore, by calcining the ferrite magnetic material in two steps, it is possible to make the particles finer and more uniform, and to achieve the matching of shrinkage and the stabilization of electrical characteristics.
〔実施例〕 以下、本発明の実施例について説明する。[Examples] Examples of the present invention will be described below.
ニッケルフェライトとして、Fe2O3が44mol％、NiOが56m
ol％の混合比のものを用いた。ホウケイ酸ガラスとし
て、日本電気硝子社製のBO−9を用いた。As nickel ferrite, 44 mol% of Fe 2 O 3 and 56 m of NiO
An ol% mixture ratio was used. BO-9 manufactured by Nippon Electric Glass Co., Ltd. was used as the borosilicate glass.
ニッケルフェライトの材料となるFe2O3とNiOの材料粉末
を秤量し、ボールミルで約６時間混合し、乾燥ののち、
約900℃の温度で２時間仮焼した。The material powders of Fe 2 O 3 and NiO, which are the materials of nickel ferrite, are weighed and mixed in a ball mill for about 6 hours, and after drying,
It was calcined at a temperature of about 900 ° C. for 2 hours.
得られたニッケルフェライトの粉体とホウケイ酸ガラス
とを70wt％、30wt％の混合で秤量混合した。混合は約６
時間行った。The obtained nickel ferrite powder and borosilicate glass were weighed and mixed at 70 wt% and 30 wt%. Mix about 6
I went on time.
この混合によって得られた粉体を仮焼した。仮焼温度は
約700℃で時間は２時間とした。The powder obtained by this mixing was calcined. The calcination temperature was about 700 ° C. and the time was 2 hours.
この焼結体を２〜６時間粉砕した磁性材料を得た。この
粉砕時間は、仮焼条件によって異なり、特に温度によっ
て粒子の状態が異なるので、その結果を見て調整するこ
とができる。This sintered body was crushed for 2 to 6 hours to obtain a magnetic material. This pulverizing time varies depending on the calcination conditions, and particularly the state of the particles varies depending on the temperature, so that it is possible to adjust by observing the result.
上記の製造工程によって得られた磁性材料の粒子は0.03
μ程度と非常に微粒子化されていることが確認された。Particles of the magnetic material obtained by the above manufacturing process is 0.03
It was confirmed that the particle size was very small, about μ.
この磁性材料にバインダー等を加えて磁性体ペーストを
作成し、Agを成分とする導体ペーストと交互に印刷、積
層する。それによって、磁性体内を層間から層間に接続
されて周回するコイルパターンが得られる。A binder or the like is added to this magnetic material to form a magnetic paste, which is alternately printed and laminated with a conductor paste containing Ag as a component. As a result, a coil pattern is obtained in which the magnetic material is wound from one layer to another and is connected between layers.
積層された内部に導体パターンを形成された磁性体は乾
燥の後焼成される。積層ＬＣ複合部品においては、更に
誘電体材料内に導体パターンが対向するコンデンサが一
体に形成され、一体に焼成される。The magnetic body having the conductor pattern formed inside is laminated and dried and then fired. In the laminated LC composite component, capacitors having conductor patterns facing each other are integrally formed in a dielectric material and integrally fired.
磁性材料と誘電体材料を一体に焼成すると収縮率が異な
るので、層間の剥離が生じ易くなる。また反りが生じる
ので、ストレスも発生する。第１図はその状況を示すグ
ラフである。横軸は焼成温度、縦軸は収縮率を示してい
る。チタン系の誘電体材料（TiO2 90.45wt％、NiO 6wt
％、CuO 3wt％、MnO2 0.5wt％、SiO2 0.05wt％）の収縮
の状況を実線11で示してある。650℃以上となると収縮
が発生し、870℃では約7.8％の収縮となる。それに対し
て、従来のホウケイ酸ガラスを添加した磁性体材料の収
縮の状況を点線12で示してある。When the magnetic material and the dielectric material are fired together, the shrinkage ratios are different, so that peeling between layers easily occurs. Further, since warpage occurs, stress also occurs. FIG. 1 is a graph showing the situation. The horizontal axis represents the firing temperature and the vertical axis represents the shrinkage rate. Titanium-based dielectric material (TiO 2 90.45wt%, NiO 6wt
%, CuO 3 wt%, MnO 2 0.5 wt%, SiO 2 0.05 wt%) is shown by the solid line 11. At 650 ° C or higher, shrinkage occurs, and at 870 ° C, shrinkage is about 7.8%. On the other hand, the state of shrinkage of the magnetic material to which the conventional borosilicate glass is added is shown by a dotted line 12.
500程度から収縮が始まり、870℃では4.6％となって、
誘電体材料と大きな差を生じていた。Shrinkage starts from around 500, and becomes 4.6% at 870 ℃,
There was a big difference with the dielectric material.
本発明によって二段階の仮焼を行った磁性材料を用いた
場合は破線13で示してある。収縮率の変化は誘電体材料
の変化に近似しており、その差はいずれも１％以内とな
っている。したがって、誘電体材料と磁性材料を一体に
焼成しても、収縮率が整合しており、剥離が生じたりす
ることがなくなる。The case where a magnetic material which has been subjected to two-step calcination according to the present invention is used is shown by a broken line 13. The change in shrinkage is similar to the change in the dielectric material, and the difference is within 1% in all cases. Therefore, even if the dielectric material and the magnetic material are integrally fired, the contraction rates are matched and peeling does not occur.
本発明によれば、磁性材料の収縮率を誘電体材料の収縮
率と合わせることができるので、層間の剥離を生じるこ
とを防止できる。これによって、機械的な強度が高まっ
て信頼性が向上するとともに、歩留も向上する。According to the present invention, the shrinkage rate of the magnetic material can be matched with the shrinkage rate of the dielectric material, so that peeling between layers can be prevented. As a result, mechanical strength is increased, reliability is improved, and yield is also improved.
また、収縮率の差によって生じたストレスによって生じ
る電気的な特性の劣化を防止することもできる。Further, it is possible to prevent the deterioration of the electrical characteristics caused by the stress caused by the difference in the contraction rate.
更に、粒子の微細化均質化によるものと思われいるが、
本発明によって製造した磁性材料によって製造した積層
インダクタ、積層ＬＣ複合部品の特性が安定となり、バ
ラツキが小さくなっていた。Furthermore, it is thought that this is due to the homogenization of the particles,
The characteristics of the laminated inductor and the laminated LC composite component manufactured by the magnetic material manufactured by the present invention were stable, and the variations were small.
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 characteristics of the magnetic material according to the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭48−72698（ＪＰ，Ａ) 特開 平１−110708（ＪＰ，Ａ) 特公 昭49−22118（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-48-72698 (JP, A) JP-A-1-110708 (JP, A) JP-B-49-22118 (JP, B1)
Claims (2)
と、内部に周回する導体パターンを具えた積層インダク
タを一体に焼成してなる積層ＬＣ複合部品の、積層イン
ダクタを形成するためのセラミック磁性体ペーストとな
る積層ＬＣ複合部品用磁性材料の製造方法において、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
加したものであり、フェライト材料を混合して仮焼した
後に、該フェライト材料とホウケイ酸ガラスを混合して
仮焼した後に粉砕することを特徴とする積層ＬＣ複合部
品用磁性材料の製造方法。1. A ceramic magnetic material for forming a laminated inductor of a laminated LC composite component, which is formed by integrally firing a capacitor having electrodes facing each other inside and a laminated inductor having a conductor pattern that circulates inside. In the method for producing a magnetic material for a laminated LC composite component, which is a paste, the ceramic magnetic body is ferrite to which borosilicate glass is added, and the ferrite material and the borosilicate glass are mixed after the ferrite material is mixed and calcined. A method for producing a magnetic material for a laminated LC composite component, comprising: mixing, calcining, and pulverizing.
と、内部に周回する導体パターンを具えた積層インダク
タを一体に焼成してなる積層ＬＣ複合部品の、積層イン
ダクタを形成するためのセラミック磁性体ペーストとな
る積層ＬＣ複合部品用磁性材料の製造方法において、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
ラスを添加したものであり、フェライト材料を混合して
仮焼した後、該フェライト材料とホウケイ酸ガラスを混
合して仮焼した後に粉砕することを特徴とする積層ＬＣ
複合部品用磁性材料の製造方法。2. A ceramic magnetic body for forming a laminated inductor of a laminated LC composite component, which is formed by integrally firing a capacitor having electrodes facing each other inside and a laminated inductor having a conductor pattern that circulates inside. In the method for producing a magnetic material for a laminated LC composite component, which is a paste, the ceramic magnetic body is nickel ferrite to which borosilicate glass is added, and the ferrite material and the borosilicate are mixed after calcination. Laminated LC characterized by being mixed with glass, calcined and then crushed
Manufacturing method of magnetic material for composite parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196091A JPH0642416B2 (en) | 1989-07-28 | 1989-07-28 | Method for producing magnetic material for laminated LC composite component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196091A JPH0642416B2 (en) | 1989-07-28 | 1989-07-28 | Method for producing magnetic material for laminated LC composite component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360103A JPH0360103A (en) | 1991-03-15 |
| JPH0642416B2 true JPH0642416B2 (en) | 1994-06-01 |
Family
ID=16352064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196091A Expired - Lifetime JPH0642416B2 (en) | 1989-07-28 | 1989-07-28 | Method for producing magnetic material for laminated LC composite component |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0642416B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002175916A (en) * | 2000-12-07 | 2002-06-21 | Murata Mfg Co Ltd | Inductor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4872698A (en) * | 1971-12-29 | 1973-10-01 | ||
| JPS5548292B2 (en) * | 1972-06-17 | 1980-12-05 | ||
| JP2691715B2 (en) * | 1987-07-01 | 1997-12-17 | ティーディーケイ株式会社 | Ferrite sintered body, chip inductor and LC composite parts |
-
1989
- 1989-07-28 JP JP1196091A patent/JPH0642416B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360103A (en) | 1991-03-15 |
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