JPH04341908A - Composite magnetic head - Google Patents
Composite magnetic headInfo
- Publication number
- JPH04341908A JPH04341908A JP11483991A JP11483991A JPH04341908A JP H04341908 A JPH04341908 A JP H04341908A JP 11483991 A JP11483991 A JP 11483991A JP 11483991 A JP11483991 A JP 11483991A JP H04341908 A JPH04341908 A JP H04341908A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- metal magnetic
- magnetic film
- film
- metal
- 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
- 239000002131 composite material Substances 0.000 title claims description 20
- 239000000696 magnetic material Substances 0.000 claims abstract description 15
- 230000035699 permeability Effects 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 67
- 229910052751 metal Inorganic materials 0.000 claims description 67
- 230000004907 flux Effects 0.000 abstract description 14
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 229910000702 sendust Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 206010040844 Skin exfoliation Diseases 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 229910003271 Ni-Fe Inorganic materials 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/1875—"Composite" pole pieces, i.e. poles composed in some parts of magnetic particles and in some other parts of magnetic metal layers
- G11B5/1877—"Composite" pole pieces, i.e. poles composed in some parts of magnetic particles and in some other parts of magnetic metal layers including at least one magnetic thin film
- G11B5/1878—"Composite" pole pieces, i.e. poles composed in some parts of magnetic particles and in some other parts of magnetic metal layers including at least one magnetic thin film disposed immediately adjacent to the transducing gap, e.g. "Metal-In-Gap" structure
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は膜剥離の恐れがなく、且
つ磁気特性の優れた金属磁性膜を有する複合磁気ヘッド
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite magnetic head having a metal magnetic film with excellent magnetic properties and without fear of film peeling.
【０００２】0002
【従来の技術】従来、この種の磁気ヘッドとしては、図
１５に示すようにフェライト等の酸化物磁性材料よりな
る一対のコア半体１ａ、１ｂのギャップ形成面側にセン
ダスト等の金属磁性膜２、２を形成し、該磁性膜２、２
同士をギャップスペーサ３を介して衝き合わせることに
よりギャップｇを形成し、磁気回路を構成している。2. Description of the Related Art Conventionally, in this type of magnetic head, as shown in FIG. 15, a metal magnetic film such as sendust or the like is coated on the gap forming surfaces of a pair of core halves 1a and 1b made of oxide magnetic material such as ferrite. 2, 2, and the magnetic films 2, 2 are formed.
A gap g is formed by abutting them with each other via a gap spacer 3, thereby configuring a magnetic circuit.
【０００３】然し乍ら、より高密度記録を行うためには
、金属磁性膜はセンダスト等よりも高い飽和磁束密度を
もつ材料が必要である。しかしながら、高い飽和磁束密
度をもつ材料は透磁率が不十分であるため、読み出し能
力が劣るといった問題があった。However, in order to perform higher density recording, the metal magnetic film needs to be made of a material with a higher saturation magnetic flux density than Sendust or the like. However, since materials with high saturation magnetic flux density have insufficient magnetic permeability, there has been a problem in that readout performance is poor.
【０００４】又、このような構造の複合磁気ヘッドはフ
ェライトの熱膨張係数が１００×１０−７〜１１５×１
０−７／℃であるのに対して、センダストの熱膨張係数
が１４５×１０−７〜１６０×１０−７／℃と差がある
ため、センダストに応力が生じ、膜剥離等が生じてしま
うといった問題があった。又、膜に応力があると磁性膜
の磁気特性も劣化してしまうといった問題も生じていた
。[0004] In addition, in a composite magnetic head having such a structure, the thermal expansion coefficient of ferrite is 100×10-7 to 115×1.
0-7/℃, whereas the thermal expansion coefficient of Sendust is 145 x 10-7 to 160 x 10-7/℃, which causes stress in Sendust and causes film peeling etc. There was such a problem. Further, there has been a problem in that the magnetic properties of the magnetic film deteriorate when the film is stressed.
【０００５】これらの問題を解決するためには、上記酸
化物磁性材料と金属磁性膜の熱膨張係数の差を小さくす
る必要がある。しかしながら、酸化物磁性材料の熱膨張
係数と同じ程度の金属磁性膜では、高密度記録に対応し
た飽和磁束密度と透磁率の両方ともを良好なものとする
ことができなかった。In order to solve these problems, it is necessary to reduce the difference in thermal expansion coefficient between the oxide magnetic material and the metal magnetic film. However, with a metal magnetic film having a coefficient of thermal expansion comparable to that of an oxide magnetic material, it has not been possible to achieve both saturation magnetic flux density and magnetic permeability that are compatible with high-density recording.
【０００６】[0006]
【発明が解しようとする課題】本発明は上記従来例の諸
欠点に鑑み為されたものであり、金属磁性膜が剥離する
ことなく、良好な記録再生が可能な複合磁気ヘッドを提
供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the conventional examples described above, and an object of the present invention is to provide a composite magnetic head capable of good recording and reproducing without peeling off the metal magnetic film. The purpose is to
【０００７】[0007]
【課題を解決するための手段】本発明は、酸化物磁性材
料よりなる一対のコア半体のうち少なくとも一方のコア
半体に金属磁性膜を設け、該金属磁性膜をギャップスペ
ーサを介して他方のコア半体に衝き合わせてなる複合磁
気ヘッドにおいて、金属磁性膜は第２金属磁性膜と第１
金属磁性膜とがギャップスペーサ側からこの順で構成さ
れており、第１金属磁性膜は高い飽和磁束密度を有し、
第２金属磁性膜は高い透磁率を有することを特徴とする
。[Means for Solving the Problems] The present invention provides a metal magnetic film on at least one of a pair of core halves made of an oxide magnetic material, and connects the metal magnetic film to the other core half through a gap spacer. In the composite magnetic head formed by abutting core halves of the metal magnetic film, the second metal magnetic film and the first metal magnetic film are
The first metal magnetic film has a high saturation magnetic flux density, and the first metal magnetic film has a high saturation magnetic flux density.
The second metal magnetic film is characterized by having high magnetic permeability.
【０００８】[0008]
【作用】上記構成によれば、第１金属磁性膜は高い飽和
磁束密度をもつので、高抗磁力媒体に対しても飽和され
ることがなく、良好な書き込みができる。また、第２金
属磁性膜は高い透磁率をもつので、良好な読み出しがで
きる。従って、良好な記録再生が可能になる。According to the above structure, since the first metal magnetic film has a high saturation magnetic flux density, it is not saturated even on a high coercive force medium, and good writing can be performed. Further, since the second metal magnetic film has high magnetic permeability, good readout is possible. Therefore, good recording and reproduction is possible.
【０００９】[0009]
【実施例】以下、図面を参照しつつ本発明の実施例を詳
細に説明する。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【００１０】図１は第１実施例の複合磁気ヘッドの断面
図である。又、図２はこのヘッドの媒体摺動面を示す図
である。FIG. 1 is a sectional view of a composite magnetic head according to a first embodiment. Further, FIG. 2 is a diagram showing the medium sliding surface of this head.
【００１１】図中、１ａ、１ｂはＭｎ−Ｚｎフェライト
等の酸化物磁性材料（熱膨張係数α：１００〜１１５×
１０−７／℃，飽和磁束密度Ｂｓ：〜０．５Ｔ）からな
る一対のコア半体であり、該コア半体１ａ、１ｂのギャ
ップ形成側の面には巻線溝６、６が形成されている。In the figure, 1a and 1b are oxide magnetic materials such as Mn-Zn ferrite (thermal expansion coefficient α: 100 to 115×
10-7/°C, saturation magnetic flux density Bs: ~0.5T), and winding grooves 6, 6 are formed on the gap forming side surfaces of the core halves 1a, 1b. ing.
【００１２】前記コア半体１ａ、１ｂのギャップ形成側
の面には、第１金属磁性膜２ａ、第２金属磁性膜２ｂを
この順で構成した金属磁性膜２が形成されている。A metal magnetic film 2 comprising a first metal magnetic film 2a and a second metal magnetic film 2b in this order is formed on the gap forming side surfaces of the core halves 1a and 1b.
【００１３】第１金属磁性膜２ａは記録時に主に関係す
るので、飽和磁束密度がセンダスト（１．０Ｔ）より高
く、且つその熱膨張係数が酸化物磁性材料のものと同じ
または近傍のものである。第２金属磁性膜２ｂは再生時
に主に関係するので、透磁率が２０００以上の高いもの
である。第１金属磁性膜２ａは、例えば図３のうちから
選択することができる。尚、図３に示す第１金属磁性膜
の材料には、Ｔａ、Ｚｒ、Ｈｆ、Ｒｕ、Ｍｏ、Ｃｒ、Ｎ
ｂ等のうち１種以上を添加してもよい。第２金属磁性膜
２ｂは例えばセンダスト（μ＞２０００）等のほか図４
のうちから選択することができる。Since the first metal magnetic film 2a is mainly involved in recording, it should have a saturation magnetic flux density higher than Sendust (1.0T) and a coefficient of thermal expansion equal to or close to that of the oxide magnetic material. be. Since the second metal magnetic film 2b is mainly involved in reproduction, it has a high magnetic permeability of 2000 or more. The first metal magnetic film 2a can be selected from, for example, those shown in FIG. The materials of the first metal magnetic film shown in FIG. 3 include Ta, Zr, Hf, Ru, Mo, Cr, and N.
One or more types of b. etc. may be added. The second metal magnetic film 2b may be made of, for example, Sendust (μ>2000) or the like as shown in FIG.
You can choose from among them.
【００１４】更に、第２金属磁性膜２ｂは高周波領域で
のうず電流損失を抑え、透磁率を良好なものとするため
、その膜厚は表皮厚さδの２倍以下としている。ここで
、表皮厚さは以下の関係式から求めることができ、例え
ば、ハイビジョンＶＴＲ用に用いる場合、周波数ｆは３
５ＭＨｚとすればよい。Furthermore, in order to suppress eddy current loss in a high frequency region and to improve magnetic permeability, the second metal magnetic film 2b has a thickness that is less than twice the skin thickness δ. Here, the skin thickness can be obtained from the following relational expression. For example, when used for high-definition VTR, the frequency f is 3
It may be set to 5 MHz.
【００１５】[0015]
【数１】[Math 1]
【００１６】尚、δは表皮厚さ（ｍ）、ρは比抵抗（Ω
ｍ）、ｆは周波数（Ｈｚ）、μ０は真空の透磁率（４π
×１０−７）、μは透磁率である。第１金属磁性膜２ａ
がＦｅ−Ｎｉ合金（Ｎｉ：６０ｗｔ％、残余はＦｅ）で
あり、第２金属磁性膜２ｂがＮｉ−Ｆｅ合金（Ｎｉ：８
０ｗｔ％、残余はＦｅ）である場合、それぞれの膜厚は
例えば約２μｍ、約３μｍであればよい。[0016] Here, δ is the skin thickness (m), and ρ is the specific resistance (Ω
m), f is the frequency (Hz), μ0 is the vacuum permeability (4π
×10-7), μ is magnetic permeability. First metal magnetic film 2a
is a Fe-Ni alloy (Ni: 60wt%, the balance is Fe), and the second metal magnetic film 2b is a Ni-Fe alloy (Ni: 8wt%).
0 wt % and the remainder is Fe), the respective film thicknesses may be, for example, approximately 2 μm and approximately 3 μm.
【００１７】前記一対のコア半体１ａ、１ｂは、金属磁
性膜２、２同士がＳｉＯ２等の非磁性材料よりなるギャ
ップスペーサ３を介して対向するように衝き合わされ、
ギャップｇが形成されている。The pair of core halves 1a, 1b are abutted against each other such that the metal magnetic films 2, 2 face each other with a gap spacer 3 made of a non-magnetic material such as SiO2 interposed therebetween;
A gap g is formed.
【００１８】７はトラック幅規制溝であり、このトラッ
ク幅規制溝７内にはガラス１０が充填されている。前記
一対のコア半体１ａ、１ｂは前記ガラス１０により接合
固定されている。Reference numeral 7 denotes a track width regulating groove, and this track width regulating groove 7 is filled with glass 10 . The pair of core halves 1a and 1b are bonded and fixed by the glass 10.
【００１９】次に、この複合磁気ヘッドの製造方法につ
いて説明する。Next, a method of manufacturing this composite magnetic head will be explained.
【００２０】先ず、図５に示すようにコア半体となる酸
化物磁性材料よりなる基板１を用意し、該基板１の上面
に第１金属磁性膜２ａをスパッタリングにより被着形成
し、該第１金属磁性膜２ａ上に第２金属磁性膜２ｂをス
パッタリングにより被着形成して金属磁性膜２を作成す
る。First, as shown in FIG. 5, a substrate 1 made of an oxide magnetic material that will serve as a core half is prepared, and a first metal magnetic film 2a is deposited on the upper surface of the substrate 1 by sputtering. A second metal magnetic film 2b is deposited on the first metal magnetic film 2a by sputtering to form a metal magnetic film 2.
【００２１】次に、図６に示すように前記金属磁性膜２
上にＳｉＯ２等からなるギャップスペーサ３をスパッタ
リングにより被着形成する。Next, as shown in FIG.
A gap spacer 3 made of SiO2 or the like is deposited thereon by sputtering.
【００２２】次に、図７に示すように前記基板１の上面
にトラック幅規制溝７、巻線溝（図示せず）等の溝加工
を施す。Next, as shown in FIG. 7, grooves such as track width regulating grooves 7 and winding grooves (not shown) are formed on the upper surface of the substrate 1.
【００２３】次に、図７に示す基板１を一対用意し、図
８に示すように前記一対の基板１、１’を金属磁性膜２
、２’同士がギャップスぺーサ３を介して対向するよう
に衝き合わせ、該一対の基板１、１’をガラス１０の溶
融固化により接合固定してコアブロック１３を形成する
。Next, a pair of substrates 1 shown in FIG. 7 are prepared, and as shown in FIG.
, 2' are abutted against each other with a gap spacer 3 in between, and the pair of substrates 1 and 1' are bonded and fixed by melting and solidifying the glass 10 to form a core block 13.
【００２４】次に、前記コアブロック１３を図８の破線
Ａ−Ａ’に沿って切断し、所定の外形加工を施すことに
より図１の複合磁気ヘッドが完成する。Next, the core block 13 is cut along the broken line AA' in FIG. 8, and a predetermined external shape is processed to complete the composite magnetic head shown in FIG.
【００２５】図９〜図１１に示す実線は、例えば酸化物
磁性材料として熱膨張係数が１００×１０−７／℃のＭ
ｎ−Ｚｎフェライト、第１金属磁性膜２ａとしてＦｅ−
Ｎｉ合金（Ｎｉ：６０ｗｔ％、残余はＦｅ）、第２金属
磁性膜２ｂとしてＮｉ−Ｆｅ合金（Ｎｉ：８０ｗｔ％、
残余はＦｅ）である場合の飽和磁束密度Ｂｓ、１０ＭＨ
ｚでの透磁率μ及び熱膨張係数αの関係を示している。
又、破線は従来例である上記酸化物磁性材料上に標準組
成のセンダスト合金を形成した場合のものである。The solid lines shown in FIGS. 9 to 11 indicate, for example, M having a thermal expansion coefficient of 100×10 −7 /° C. as an oxide magnetic material.
n-Zn ferrite, Fe- as the first metal magnetic film 2a
Ni alloy (Ni: 60 wt%, balance is Fe), Ni-Fe alloy (Ni: 80 wt%,
Saturation magnetic flux density Bs when the remainder is Fe), 10MH
It shows the relationship between magnetic permeability μ and thermal expansion coefficient α at z. Moreover, the broken line shows the case where a sendust alloy of standard composition is formed on the above-mentioned oxide magnetic material, which is a conventional example.
【００２６】図９に示すように、本実施例のものは従来
例のものに比べて高飽和磁束密度をもつ第１金属磁性膜
２ａを有するため、高抗磁力媒体に対しても飽和するこ
とがなく、書き込み能力に優れている。又、図１０に示
すように高透磁率をもつ第２金属磁性膜２ｂをギャップ
に接して有するため、高密度記録においても読み出し能
力にも優れている。As shown in FIG. 9, this example has the first metal magnetic film 2a having a higher saturation magnetic flux density than that of the conventional example, so it can be saturated even with a high coercive force medium. , and has excellent writing ability. Further, as shown in FIG. 10, since the second metal magnetic film 2b with high magnetic permeability is provided in contact with the gap, it has excellent readability even in high-density recording.
【００２７】更に、図１１に示すように酸化物磁性材料
と第１金属磁性膜２ａとの熱膨張係数の差が小さいので
、生じる応力が小さく、第１金属磁性膜２ａの剥離を防
止できる。又、第１金属磁性膜２ａと第２金属磁性膜２
ｂは主に金属結合により結合されているため、熱膨張係
数の差が大きい場合でも第２金属磁性膜２ｂが剥離する
恐れが少ない。更に金属磁性膜は第１，第２金属磁性膜
で構成されるので、酸化物磁性材料、第１，第２金属磁
性膜間の熱膨張係数の差をそれぞれ小さくできる。従っ
て、第１，第２金属磁性膜の磁気特性の劣化を防止でき
る。Furthermore, as shown in FIG. 11, since the difference in coefficient of thermal expansion between the oxide magnetic material and the first metal magnetic film 2a is small, the stress generated is small and peeling of the first metal magnetic film 2a can be prevented. Moreover, the first metal magnetic film 2a and the second metal magnetic film 2
b are mainly connected by metallic bonds, so there is little possibility that the second metal magnetic film 2b will peel off even if there is a large difference in coefficient of thermal expansion. Furthermore, since the metal magnetic film is composed of the first and second metal magnetic films, the difference in thermal expansion coefficient between the oxide magnetic material and the first and second metal magnetic films can be reduced. Therefore, deterioration of the magnetic properties of the first and second metal magnetic films can be prevented.
【００２８】尚、本実施例では、コア半体１ａ，１ｂの
両方に金属磁性膜２，２を形成しているが、コア半体１
ａ，１ｂの一方に形成するような構成にしてもよい。In this embodiment, the metal magnetic films 2, 2 are formed on both the core halves 1a and 1b.
The structure may be such that it is formed on one of a and 1b.
【００２９】上述のように、基板１との熱膨張係数の差
が小さく、且つ飽和磁束密度が高い第１金属磁性膜２ａ
を選択して、基板１と第１金属磁性膜２ａの剥離を防止
すると共に書込み能力を良好にする。更に、透磁率が高
い第２金属磁性膜２ｂを第１金属磁性膜２ａ上に形成す
ることにより、読出し能力を良好にする。尚、第２金属
磁性膜２ｂは第１金属磁性膜２ａと金属結合するため、
剥離する恐れが殆どない。As described above, the first metal magnetic film 2a has a small difference in thermal expansion coefficient from the substrate 1 and has a high saturation magnetic flux density.
is selected to prevent separation between the substrate 1 and the first metal magnetic film 2a and to improve the writing ability. Furthermore, by forming the second metal magnetic film 2b with high magnetic permeability on the first metal magnetic film 2a, the read ability is improved. Note that since the second metal magnetic film 2b is metallically bonded to the first metal magnetic film 2a,
There is almost no risk of peeling.
【００３０】尚、第１金属磁性膜２ａは、基板１の表面
を研摩し、更に、その研摩によるダメージ層をエッチン
グ等により取り除いた後に形成してもよい。The first metal magnetic film 2a may be formed after polishing the surface of the substrate 1 and removing a layer damaged by the polishing by etching or the like.
【００３１】又、酸化物磁性材料はＮｉ−Ｚｎ等の他の
材料でもよい。又、第１金属磁性膜、第２金属磁性膜も
上述の実施例に限定されるものではない。The oxide magnetic material may also be other materials such as Ni--Zn. Further, the first metal magnetic film and the second metal magnetic film are not limited to the above embodiments.
【００３２】又、本発明の複合磁気ヘッドは、上述の実
施例以外構造のものでもよく、例えば図１２〜図１４に
示すような摺動面をもつ構造のものでもよい。Further, the composite magnetic head of the present invention may have a structure other than the above-described embodiment, for example, may have a structure having a sliding surface as shown in FIGS. 12 to 14.
【００３３】[0033]
【発明の効果】本発明によれば、第１金属磁性膜は高い
飽和磁束密度をもつので、高抗磁力媒体に対しても飽和
されることがなく、良好な書き込みができる。また、第
２金属磁性膜は高い透磁率をもつので、良好な読み出し
ができる。従って、良好な記録再生が可能な複合磁気ヘ
ッドを提供し得る。According to the present invention, since the first metal magnetic film has a high saturation magnetic flux density, it is not saturated even on a high coercive force medium, and good writing can be performed. Further, since the second metal magnetic film has high magnetic permeability, good readout is possible. Therefore, it is possible to provide a composite magnetic head capable of good recording and reproduction.
【図１】本発明の一実施例の複合磁気ヘッドの断面図で
ある。FIG. 1 is a sectional view of a composite magnetic head according to an embodiment of the present invention.
【図２】この磁気ヘッドの媒体摺接面を示す正面図であ
る。FIG. 2 is a front view showing the medium sliding contact surface of this magnetic head.
【図３】この磁気ヘッドの第１金属磁性膜の材料とその
特性を示す図である。FIG. 3 is a diagram showing the material of the first metal magnetic film of this magnetic head and its characteristics.
【図４】この磁気ヘッドの第２金属磁性膜の材料とその
特性を示す図である。FIG. 4 is a diagram showing the material of the second metal magnetic film of this magnetic head and its characteristics.
【図５】この磁気ヘッドの製造時の状態１を示す側面図
である。FIG. 5 is a side view showing state 1 of this magnetic head during manufacture.
【図６】この磁気ヘッドの製造時の状態２を示す側面図
である。FIG. 6 is a side view showing state 2 of this magnetic head during manufacture.
【図７】この磁気ヘッドの製造時の状態３を示す側面図
である。FIG. 7 is a side view showing state 3 of this magnetic head during manufacture.
【図８】この磁気ヘッドの製造時の状態４を示す側面図
である。FIG. 8 is a side view showing state 4 of this magnetic head during manufacture.
【図９】本発明と従来例の複合磁気ヘッドにおける飽和
磁束密度の変化を示す図である。FIG. 9 is a diagram showing changes in saturation magnetic flux density in composite magnetic heads of the present invention and a conventional example.
【図１０】本発明と従来例の複合磁気ヘッドにおける透
磁率の変化を示す図である。FIG. 10 is a diagram showing changes in magnetic permeability in composite magnetic heads of the present invention and a conventional example.
【図１１】本発明と従来例の複合磁気ヘッドにおける熱
膨張係数の変化を示す図である。FIG. 11 is a diagram showing changes in thermal expansion coefficients in composite magnetic heads of the present invention and a conventional example.
【図１２】本発明の他の実施例の複合磁気ヘッドの媒体
摺接面を示す図である。FIG. 12 is a diagram showing the medium sliding contact surface of a composite magnetic head according to another embodiment of the present invention.
【図１３】本発明の他の実施例の複合磁気ヘッドの媒体
摺接面を示す図である。FIG. 13 is a diagram showing a medium sliding contact surface of a composite magnetic head according to another embodiment of the present invention.
【図１４】本発明の他の実施例の複合磁気ヘッドの媒体
摺接面を示す図である。FIG. 14 is a diagram showing the medium sliding contact surface of a composite magnetic head according to another embodiment of the present invention.
【図１５】従来例の複合磁気ヘッドの断面図である。FIG. 15 is a sectional view of a conventional composite magnetic head.
１ａ コア半体 １ｂ コア半体 ２ 金属磁性膜 ２ａ 第１金属磁性膜 ２ｂ 第２金属磁性膜 1a Core half 1b Core half 2 Metal magnetic film 2a First metal magnetic film 2b Second metal magnetic film
Claims (1)
体のうち少なくとも一方のコア半体に金属磁性膜を設け
、該金属磁性膜をギャップスペーサを介して他方のコア
半体に衝き合わせてなる複合磁気ヘッドにおいて、金属
磁性膜は第２金属磁性膜と第１金属磁性膜とがギャップ
スペーサ側からこの順で構成されており、第１金属磁性
膜は高い飽和磁束密度を有し、第２金属磁性膜は高い透
磁率を有することを特徴とする複合磁気ヘッド。Claim 1: A metal magnetic film is provided on at least one of a pair of core halves made of an oxide magnetic material, and the metal magnetic film is abutted against the other core half through a gap spacer. In this composite magnetic head, the metal magnetic film is composed of a second metal magnetic film and a first metal magnetic film in this order from the gap spacer side. A composite magnetic head characterized in that the two-metal magnetic film has high magnetic permeability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11483991A JPH04341908A (en) | 1991-05-20 | 1991-05-20 | Composite magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11483991A JPH04341908A (en) | 1991-05-20 | 1991-05-20 | Composite magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04341908A true JPH04341908A (en) | 1992-11-27 |
Family
ID=14647995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11483991A Pending JPH04341908A (en) | 1991-05-20 | 1991-05-20 | Composite magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04341908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027187A1 (en) * | 1995-02-27 | 1996-09-06 | Hitachi, Ltd. | Magnetic recording medium and magnetic storage device |
-
1991
- 1991-05-20 JP JP11483991A patent/JPH04341908A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027187A1 (en) * | 1995-02-27 | 1996-09-06 | Hitachi, Ltd. | Magnetic recording medium and magnetic storage device |
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