JPH01101610A - Chip inductor - Google Patents
Chip inductorInfo
- Publication number
- JPH01101610A JPH01101610A JP62259898A JP25989887A JPH01101610A JP H01101610 A JPH01101610 A JP H01101610A JP 62259898 A JP62259898 A JP 62259898A JP 25989887 A JP25989887 A JP 25989887A JP H01101610 A JPH01101610 A JP H01101610A
- Authority
- JP
- Japan
- Prior art keywords
- chip inductor
- magnetic field
- epoxy resin
- nio
- cuo
- 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
Links
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 7
- 229910021446 cobalt carbonate Inorganic materials 0.000 claims abstract description 4
- 229910000428 cobalt oxide Inorganic materials 0.000 claims abstract description 4
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 claims abstract description 4
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims abstract description 4
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011029 spinel Substances 0.000 abstract description 3
- 229910052596 spinel Inorganic materials 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Landscapes
- Magnetic Ceramics (AREA)
- Soft Magnetic Materials (AREA)
- Coils Or Transformers For Communication (AREA)
- Compounds Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ＩＭＨｚ以上の高周波で用いられるチップイ
ンダクタに関し、特にＴＶ、ビデオテープレコーダ等に
用いられるチップインダクタに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a chip inductor used at high frequencies of IMHz or higher, and particularly to a chip inductor used in TVs, video tape recorders, etc.
（従来の技術）
このチップインダクタは、従来Ｎｉ −Ｚｎ系フェライ
トであって、Ｆｅ、０．４６〜ｂ
１％、残りＮｉＯ及びＣｕＯの組成を有していた。そし
て、この組成のフェライトをドラム型コアに形成し、巻
線を施し、エポキシ樹脂でモールドしていた。(Prior Art) This chip inductor was conventionally made of Ni--Zn-based ferrite, and had a composition of Fe, 0.46 to 1% b, and the remainder NiO and CuO. Then, ferrite with this composition was formed into a drum-shaped core, wound with wire, and molded with epoxy resin.
（発明が解決しようとする問題点）
従来のチップインダクタは、エポキシ樹脂で被覆する際
、エポキシ樹脂によりコアに応力が加わり、インダクタ
ンスが低下するという問題点、更には、チップインダク
タを回路基板等へ自動装着する際、チップインダクタを
磁石で保持して装着させること等による外部磁場が印加
された後に、インダクタンスが低下するという問題点が
生じていた。(Problems to be Solved by the Invention) Conventional chip inductors have a problem in that when coated with epoxy resin, stress is applied to the core by the epoxy resin, reducing inductance. When automatically mounting the chip inductor, a problem arises in that the inductance decreases after an external magnetic field is applied, such as by holding the chip inductor with a magnet and mounting it.
本発明は、上記の事を鑑みて、加圧特性、磁場特性の優
れたチップインダクタを提供することを目的とするもの
である。In view of the above, an object of the present invention is to provide a chip inductor with excellent pressure characteristics and magnetic field characteristics.
（問題点を解決するための手段）
本発明は、 ３１〜４６ｍｏｌ％のＦｅ、Ｏ，、１５〜
２９＋＋＋ｏ１％のＺｎＯ２残りがＮｉＯとＣｕＯであ
り、ＮｉＯのモル比がＣｕＯのモル比よりも多いスピネ
ル型組成物であって、小量成分として０．０５〜１ 、
Ｏｖｔ％のＣｏ、 ０４又はこれに相当する量のコバ
ルト酸化物又はコバルト炭酸化物、及び０．０５〜４．
０ｗｔ％のＳｉｎ、を含むフェライト組成物からなるド
ラム型コアに巻線を施し、更にエポキシ樹脂でモールド
するものである。(Means for solving the problems) The present invention provides 31 to 46 mol% of Fe, O, 15 to 46 mol%
29+++o1% of ZnO2 The remainder is NiO and CuO, the molar ratio of NiO is greater than the molar ratio of CuO, the spinel type composition, with minor components of 0.05 to 1,
Ovt% Co, 0.04 or equivalent amount of cobalt oxide or cobalt carbonate, and 0.05-4.
A drum-shaped core made of a ferrite composition containing 0 wt % of Sin is wound with wire, and then molded with epoxy resin.
本発明において、フェライト組成物の組成範囲を限定し
た理由は、以下のとおりである。In the present invention, the reason why the composition range of the ferrite composition is limited is as follows.
まず、主成分が上記組成範囲以外では、加圧特性、磁場
特性が悪化する。First, if the main component is outside the above composition range, the pressure characteristics and magnetic field characteristics will deteriorate.
次に、添加物Ｓｉｎ、は、初透磁率の値を制御するため
に使用するものであり、ＳｉＯ□を４．０ｗｔ％より多
く含有せしめた場合、コアの焼結性が悪化し、密度がと
れず、コア自体の強度が低下するため、０゜０５〜４．
０ｗｔ％の範囲とする。Next, the additive Sin is used to control the value of initial magnetic permeability, and if SiO□ is contained in an amount greater than 4.0 wt%, the sinterability of the core deteriorates and the density decreases. 0°05~4.
The range is 0wt%.
そして、Ｃｏ３Ｏ４は、Ｑの周波数特性を改善するため
に使用するものである。但し、その添加量が多過ぎると
、相対温度係数が３０ｐｐｍ／ ”Ｃを超えるため、０
．０５〜１．０ｗｔ％の範囲とする。Co3O4 is used to improve the frequency characteristics of Q. However, if the amount added is too large, the relative temperature coefficient will exceed 30 ppm/"C, so 0.
．． The range is 0.05 to 1.0 wt%.
（実施例）
Ｆｅ２０，４１．５ｍｏｌ％、ＮｉＯ２０，８ｍｏｌ％
、ＺｎＯ２７，４ｍｏｌ％、Ｃｕ０１０．４ｍｏｌ％の
主成分に、５ＩＱ２１．１３ｗｔ％ｌ Ｃｏ、０４０．
２％＋１％を添加した原料を振動ミルにて混合し、８０
０〜９００℃で仮焼し、この仮焼粉体を振動ミルにて粉
砕し、バインダを加え造粒し、圧縮成形して丸棒状コア
を成形し、乾燥した後ダイヤモンドグラインダーで溝加
工し、ドラム型コアとし、これを空気中で１０５０℃で
焼成し、外径１．８ｍ、全長１ 、３ ＋ｎｍ 。(Example) Fe20, 41.5 mol%, NiO20, 8 mol%
, ZnO27.4 mol%, Cu010.4 mol% as main components, 5IQ21.13wt%l Co, 040.
The raw materials to which 2% + 1% were added were mixed in a vibrating mill, and 80
Calcined at 0 to 900°C, this calcined powder is pulverized with a vibration mill, a binder is added, granulated, compression molded to form a round rod-shaped core, dried, and then grooved with a diamond grinder. A drum-shaped core was fired at 1050°C in air, with an outer diameter of 1.8 m and a total length of 1.3 + nm.
芯径０．７ｍｍのドラム型コアを得た。このドラム型コ
アに直径０．０４ｍの被膜銅線を４０ｔｕｒｎ巻き、更
にエポキシ樹脂でモールドし、チップインダクタを得た
。この本発明の一実施例のチップインダクタと従来例の
チップインダクタとの特性比較を第１表に示す。A drum-shaped core with a core diameter of 0.7 mm was obtained. A coated copper wire with a diameter of 0.04 m was wound around this drum-shaped core for 40 turns, and further molded with epoxy resin to obtain a chip inductor. Table 1 shows a comparison of characteristics between the chip inductor according to this embodiment of the present invention and the conventional chip inductor.
第１表
この第１表の加圧によるし変化率は、ドラム型コアのエ
ポキシ樹脂モールド前後のＬにより算出した・また、磁
場印加によるＬ変化率は、このエポキシ樹脂モールドし
た状態で、外部磁場（約１０００Ｇａｕｓｓ）印加前後
のＬにより算出した。また、Ｑは、エポキシ樹脂モール
ド前のコアを用い１周波数５ＭＨｚで測定した。また、
直流重畳は、Ｌ値が５％低下する直流電流の値を測定し
た。Table 1 The rate of change due to pressure in this table 1 was calculated from the L before and after the epoxy resin mold of the drum-shaped core. Also, the rate of change in L due to the application of a magnetic field is calculated by applying an external magnetic field in this epoxy resin molded state. (approximately 1000 Gauss) Calculated from L before and after application. Moreover, Q was measured at one frequency of 5 MHz using the core before being molded with epoxy resin. Also,
For DC superposition, the value of DC current at which the L value decreased by 5% was measured.
この第１表から明らかなように、本発明のチップインダ
クタは、加圧特性、磁場特性が非常に優れている。As is clear from Table 1, the chip inductor of the present invention has very excellent pressure characteristics and magnetic field characteristics.
また、第１図に、含有するＦｅ２Ｏ２量と、樹脂モール
ドした状態での磁場印加（１０００Ｇａｕｓｓ）による
Ｌ変化率とのグラフを示す、同一条件で測定した従来の
チップインダクタでは、Ｌの変化率は１０％以上であり
、本発明のチップインダクタが、加圧特性及び磁場特性
に優れていることがわかる。In addition, Fig. 1 shows a graph of the amount of Fe2O2 contained and the rate of change in L due to the application of a magnetic field (1000 Gauss) in a resin-molded state.In the conventional chip inductor measured under the same conditions, the rate of change in L is 10% or more, which shows that the chip inductor of the present invention has excellent pressure characteristics and magnetic field characteristics.
（発明の効果）
本発明のチップインダクタは、加圧特性及び磁場特性に
優れており、樹脂モールドしてもＬ値の劣化がなく、又
回路への自動装着の際に強力な磁石で保持する事等によ
る外部磁場が印加されてもＬ値の劣化の少ないチップイ
ンダクタであって、比較的温度特性も安定で、ＩＭＨｚ
以上の高周波においても損失の少ないチップインダクタ
であり、産業上極めて有益なものである。(Effects of the Invention) The chip inductor of the present invention has excellent pressure characteristics and magnetic field characteristics, does not deteriorate the L value even when molded with resin, and can be held with a strong magnet when automatically attached to a circuit. It is a chip inductor with little deterioration of the L value even when an external magnetic field is applied due to various reasons, and its temperature characteristics are relatively stable.
This is a chip inductor with low loss even at the above-mentioned high frequencies, and is extremely useful industrially.
第１図は、含有するＦｅ、 Ｏ，量と、樹脂モールドし
た状態での磁場印加（１０００Ｇａｕｓｓ）によるＬ変
化率とのグラフである。FIG. 1 is a graph of the amount of Fe and O contained and the rate of change in L due to the application of a magnetic field (1000 Gauss) in a resin-molded state.
Claims (1)
ｏｌ％のＺｎＯ，残りがＮｉＯとＣｕＯであり、ＮｉＯ
のモル比がＣｕＯのモル比よりも多いスピネル型組成物
であって、小量成分として０．０５〜１．０ｗｔ％のＣ
ｏ＿３Ｏ＿４又はこれに相当する量のコバルト酸化物又
はコバルト炭酸化物、及び０．０５〜４．０ｗｔ％のＳ
ｉＯ＿２を含むフェライト組成物からなるドラム型コア
に巻線を施し、更にエポキシ樹脂でモールドしたことを
特徴とするチップインダクタ。31-46 mol% Fe_2O_3,15-29m
ol% of ZnO, the rest is NiO and CuO, and NiO
A spinel-type composition in which the molar ratio of
o_3O_4 or equivalent amount of cobalt oxide or cobalt carbonate, and 0.05 to 4.0 wt% S
A chip inductor characterized in that a drum-shaped core made of a ferrite composition containing iO_2 is wound with wire and further molded with epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259898A JP2674624B2 (en) | 1987-10-14 | 1987-10-14 | Chip inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62259898A JP2674624B2 (en) | 1987-10-14 | 1987-10-14 | Chip inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101610A true JPH01101610A (en) | 1989-04-19 |
| JP2674624B2 JP2674624B2 (en) | 1997-11-12 |
Family
ID=17340468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62259898A Expired - Lifetime JP2674624B2 (en) | 1987-10-14 | 1987-10-14 | Chip inductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2674624B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137301A (en) * | 1988-11-18 | 1990-05-25 | Tdk Corp | Magnetic core for inductor and inductor device |
| JPH0391209A (en) * | 1989-09-01 | 1991-04-16 | Hitachi Ferrite Ltd | Chip inductor |
| EP0800183A1 (en) * | 1996-04-05 | 1997-10-08 | Thomson-Csf | Ferrite with low losses within 1MHz and 100 MHz and manufacturing process |
| US5906768A (en) * | 1996-04-03 | 1999-05-25 | Tdk Corporation | Ferrite magnetic material, and ferrite core |
| JP2016196396A (en) * | 2015-04-02 | 2016-11-24 | Tdk株式会社 | Ferrite composition and electronic component |
| JP2016196397A (en) * | 2015-04-02 | 2016-11-24 | Tdk株式会社 | Ferrite composition and electronic component |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4831457B2 (en) * | 2004-11-25 | 2011-12-07 | 日立金属株式会社 | Ferrite magnetic material and electronic component using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6428235A (en) * | 1987-07-24 | 1989-01-30 | Fuji Electrochemical Co Ltd | Pressurization-stable oxide magnetic material |
-
1987
- 1987-10-14 JP JP62259898A patent/JP2674624B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6428235A (en) * | 1987-07-24 | 1989-01-30 | Fuji Electrochemical Co Ltd | Pressurization-stable oxide magnetic material |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137301A (en) * | 1988-11-18 | 1990-05-25 | Tdk Corp | Magnetic core for inductor and inductor device |
| JPH0724243B2 (en) * | 1988-11-18 | 1995-03-15 | ティーディーケイ株式会社 | Magnetic core for inductor and inductor device |
| JPH0391209A (en) * | 1989-09-01 | 1991-04-16 | Hitachi Ferrite Ltd | Chip inductor |
| US5906768A (en) * | 1996-04-03 | 1999-05-25 | Tdk Corporation | Ferrite magnetic material, and ferrite core |
| EP0800183A1 (en) * | 1996-04-05 | 1997-10-08 | Thomson-Csf | Ferrite with low losses within 1MHz and 100 MHz and manufacturing process |
| FR2747228A1 (en) * | 1996-04-05 | 1997-10-10 | Thomson Csf | FERRITE HAVING LOW LOSSES BETWEEN 1 MHZ AND 100 MHZ AND METHOD OF MAKING SAME |
| US6071430A (en) * | 1996-04-05 | 2000-06-06 | Thomson-Csf | Low-loss ferrite working between 1 MHZ and 100 MHZ and method of manufacture |
| JP2016196396A (en) * | 2015-04-02 | 2016-11-24 | Tdk株式会社 | Ferrite composition and electronic component |
| JP2016196397A (en) * | 2015-04-02 | 2016-11-24 | Tdk株式会社 | Ferrite composition and electronic component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2674624B2 (en) | 1997-11-12 |
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