JPH065564B2 - Perpendicular magnetic recording / reproducing head - Google Patents
Perpendicular magnetic recording / reproducing headInfo
- Publication number
- JPH065564B2 JPH065564B2 JP22322884A JP22322884A JPH065564B2 JP H065564 B2 JPH065564 B2 JP H065564B2 JP 22322884 A JP22322884 A JP 22322884A JP 22322884 A JP22322884 A JP 22322884A JP H065564 B2 JPH065564 B2 JP H065564B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- permeability
- film
- recording
- magnetic recording
- 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
- 230000005291 magnetic effect Effects 0.000 title claims description 204
- 230000035699 permeability Effects 0.000 claims description 27
- 230000000694 effects Effects 0.000 claims description 23
- 230000004907 flux Effects 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 description 58
- 239000000758 substrate Substances 0.000 description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910020641 Co Zr Inorganic materials 0.000 description 1
- 229910020520 Co—Zr Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910003266 NiCo Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910000859 α-Fe 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
-
- 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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Magnetic Heads (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は垂直磁気記録再生ヘッドに関する。The present invention relates to a perpendicular magnetic recording / reproducing head.
（従来技術とその問題点） 磁気記録の記録密度を向上させる方法として、垂直磁気
記録方式が提案されている。これは磁気記録媒体（例え
ば磁気テープ、フロッピディスク）の面と垂直な方向に
信号を磁化する方式である。この垂直磁気記録の方法と
しては日本応用磁気学会第１回研究会資料「磁気記録の
将来に関する一考察一垂直形磁気記録の可能性につい
て」（岩崎俊一 昭和５２年５月２６日）の６ページに
詳細に記載されているが、概略次のようなものである。
すなわち、第２図−(a)に示す様に、高透磁率磁性膜よ
りなる主磁極１０の端部を樹脂（磁気テープやフロッピ
ディスクの基板）８上の垂直記録媒体１に接触させ、コ
イル６を巻いた高透磁率磁性体からなる補助磁極２を樹
脂基板（磁気テープ又はフロッピディスク基板）の反対
側に配置し、この補助磁極２により磁界を発生させ、こ
の磁界を主磁極１０の先端、すなわち垂直磁気記録媒体
１に接している部分に集中し、垂直磁気記録媒体１を垂
直方向に磁化することにより情報の記録がなされる。と
ころがこの形で再生を行なおうとすると出力電圧が小さ
く、高線密度記録及び高トラック密度記録を達成しよう
としても実質上、装置化は非常に困難であった。この様
な欠点を解決するために特開昭56-40407「垂直磁化記録
再生装置」に記載されたような装置が提案されている。(Prior Art and Problems Thereof) A perpendicular magnetic recording method has been proposed as a method for improving the recording density of magnetic recording. This is a method of magnetizing a signal in a direction perpendicular to the surface of a magnetic recording medium (for example, magnetic tape or floppy disk). As a method of this perpendicular magnetic recording, page 6 of the material "The One Consideration on the Future of Magnetic Recording-The Possibility of Perpendicular Magnetic Recording" (Shunichi Iwasaki, May 26, 1977), The 1st meeting of Japan Society for Applied Magnetics However, the outline is as follows.
That is, as shown in FIG. 2 (a), the end of the main magnetic pole 10 made of a high-permeability magnetic film is brought into contact with the perpendicular recording medium 1 on the resin (substrate of magnetic tape or floppy disk) 8 and the coil An auxiliary magnetic pole 2 made of a high-permeability magnetic material wound with 6 is arranged on the opposite side of the resin substrate (magnetic tape or floppy disk substrate), and a magnetic field is generated by this auxiliary magnetic pole 2, and this magnetic field is applied to the tip of the main magnetic pole 10. That is, information is recorded by concentrating on the portion in contact with the perpendicular magnetic recording medium 1 and magnetizing the perpendicular magnetic recording medium 1 in the perpendicular direction. However, when reproduction is performed in this form, the output voltage is small, and even if an attempt is made to achieve high linear density recording and high track density recording, it is practically very difficult to implement the device. In order to solve such a drawback, an apparatus as described in Japanese Patent Application Laid-Open No. 56-40407 “Vertical magnetization recording / reproducing apparatus” has been proposed.
この提案は第２図(b)及び(c)に示す様に、磁気抵抗効果
素子13,17を用い、この磁気抵抗効果素子の片面又は両
面に絶縁層12,15,16を介して高透磁率磁性膜11,14,18よ
りなる主磁極を形成し、これらの膜の端部を垂直磁気記
録媒体１に接触させ、一方の垂直磁気記録媒体の反対側
に補助磁極２を配置する様にして、記録は補助磁極２に
巻かれたコイル６に記録電流を流し、主磁極として作用
する高透磁率磁性膜11,14,18に集中する磁界により記録
を行い、再生には磁気抵抗効果素子13,17を用いて大き
な出力電圧を得る様に試みている。しかし、第２図(b)
の場合、主磁極として作用し、かつ磁気抵抗効果素子１
３の磁気シールドとしても作用する高透磁率磁性膜１１
が磁気抵抗効果素子１３に対し片面にしか配置されてい
ないため、高線密度化が困難であるという欠点を有して
いる。又第２図(c)の場合、磁気抵抗効果素子１７の両
側に絶縁層15,16を介して、主磁極の作用をする高透磁
率磁性体14,18があり、記録時の磁束が両側の主磁極14
と18に分散し、磁束密度が不足するため記録能力の減少
を生じ、高記録密度化を達成できないという欠点を有し
ていた。As shown in FIGS. 2 (b) and 2 (c), this proposal uses magnetoresistive effect elements 13 and 17 with high transparency through insulating layers 12, 15 and 16 on one side or both sides of the magnetoresistive effect elements. A main magnetic pole composed of magnetic susceptibility magnetic films 11, 14 and 18 is formed, the end portions of these films are brought into contact with the perpendicular magnetic recording medium 1, and the auxiliary magnetic pole 2 is arranged on the opposite side of one perpendicular magnetic recording medium. For recording, a recording current is caused to flow through the coil 6 wound around the auxiliary magnetic pole 2, and recording is performed by a magnetic field concentrated on the high magnetic permeability magnetic films 11, 14 and 18 acting as a main magnetic pole, and a magnetoresistive effect element is used for reproduction. We are trying to obtain a large output voltage using 13,17. However, Fig. 2 (b)
In the case of, the magnetoresistive effect element 1 acts as the main magnetic pole.
High-permeability magnetic film 11 that also functions as a magnetic shield of No. 3
Has a drawback that it is difficult to increase the linear density because it is arranged only on one side of the magnetoresistive effect element 13. In the case of FIG. 2 (c), there are high-permeability magnetic bodies 14 and 18 acting as main magnetic poles on both sides of the magnetoresistive element 17 with insulating layers 15 and 16 therebetween, and the magnetic flux at the time of recording is on both sides. The main pole 14
There is a drawback that the recording capacity is reduced due to lack of magnetic flux density, and high recording density cannot be achieved.
（発明の目的） 本発明の目的は従来の垂直磁気記録再生ヘッドに見られ
る上述の様な欠点を除去した垂直記録再生ヘッドを提供
することにある。(Object of the Invention) An object of the present invention is to provide a perpendicular recording / reproducing head which eliminates the above-mentioned drawbacks found in the conventional perpendicular magnetic recording / reproducing head.
（発明の構成） 本発明の垂直磁気記録再生ヘッドは垂直磁気記録媒体の
一方の面に対向する様に設けられた磁気抵抗効果素子
と、該磁気抵抗効果素子の両側に絶縁層を介して設けら
れた第１及び第２の高透磁率磁性膜と、前記垂直磁気記
録媒体の他方の面に対向し、かつ前記第１及び第２の磁
極の端面に対向する様に設けられた第３の高透磁率磁性
材よりなる補助磁極と、該補助磁極に巻かれたコイルと
からなる垂直磁気記録再生ヘッドにおいて、前記第１及
び第２の高透磁率磁性膜の形状が互に異なり、媒体の走
行方向に対し、前方に位置する第１の高透磁率磁性膜の
形状が前記垂直磁気記録媒体の面に平行な方向が長辺で
ある四角形であり、媒体の走行方向に対し、後方に位置
する前記第２の高透磁率磁性膜の形状が前記垂直磁気記
録媒体の面に垂直な方向が長辺である四角形であること
を特徴とする垂直磁気記録再生ヘッドである。(Structure of the Invention) A perpendicular magnetic recording / reproducing head of the present invention is provided with a magnetoresistive effect element provided so as to face one surface of a perpendicular magnetic recording medium, and an insulating layer provided on both sides of the magnetoresistive effect element. The first and second high-permeability magnetic films and the third magnetic film provided so as to face the other surface of the perpendicular magnetic recording medium and to face the end surfaces of the first and second magnetic poles. In a perpendicular magnetic recording / reproducing head including an auxiliary magnetic pole made of a high magnetic permeability magnetic material and a coil wound around the auxiliary magnetic pole, the shapes of the first and second high magnetic permeability magnetic films are different from each other. The shape of the first high-permeability magnetic film located in front of the running direction is a quadrangle having a long side in a direction parallel to the surface of the perpendicular magnetic recording medium, and is located rearward of the running direction of the medium. The shape of the second high-permeability magnetic film is the perpendicular magnetic recording medium. The perpendicular magnetic recording / reproducing head is characterized in that the direction perpendicular to the surface of the body is a quadrangle having long sides.
（発明の作用・原理） 前記の様に、磁気抵抗効果素子の両側の絶縁層を介した
第１及び第２の高透磁率磁性膜の形状を互に相違させる
ことにより、第１の高透磁率磁性膜は磁気シールド機能
のみとなり、第２の高透磁率磁性膜は磁気シールドと主
磁極の両方の機能を有する様にすることができる。即ち
第１の高透磁率磁性膜の形状を四角形（長方形が望し
い。）とし、その長い辺が垂直磁気記録媒体の面と平行
になる様にし、かつ他方の辺を第２の高透磁率磁性膜の
対応する辺より短かくすることによって、形状異方性に
より補助磁極からの励磁を行なっても反磁界が大きくな
るため磁束を集めることが出来ない。又磁気シールドと
主磁極の両方の機能を有する第２の高透磁率磁性膜の形
状を四角形（長方形が望ましい。）とし、その長い辺が
第１の高透磁率磁性膜とは逆に垂直磁気記録媒体の面と
垂直になる様にし、かつ他方の辺を第１の高透磁率磁性
膜の長辺と平行になる様にする。この様にすることによ
り、補助磁極からの励磁に際し、記録磁場が形状異方性
のため長い辺を有する第２の高透磁率磁性膜（単一の主
磁極）だけに集中し、鋭い記録磁場を作ることができる
ため、記録能力の向上がなされると同時に垂直磁気記録
媒体に書かれた磁化遷移が鋭くなり、高密度記録が達成
される。又両側に存在する第１及び第２の高透磁率磁性
膜はこのような形状をとっても磁気シールドとしての機
能は保存されているために磁気抵抗効果素子の高密度再
生特性は損なわない。第１及び第２の高透磁率磁性膜の
透磁率、飽和磁束密度もしくは膜厚を互に相違させるこ
とにより、同様の機能を発揮させることが出来る。すな
わち第１の高透磁率磁性膜を低い透磁率の膜又は小さい
飽和磁束密度或いは薄い膜厚とすると補助磁極からの励
磁に際し記録磁場の集中が少ないため主磁極としての機
能はなく、単に再生時に磁気シールドとしての機能のみ
となり、一方第２の高透磁率磁性膜を高い透磁率の膜又
は大きい飽和磁束密度或いは厚い膜厚とすると主磁極と
しての作用を呈すると共に再生時は磁気シールドとして
の機能を併せ持つ様になる。従って動作は前記の形状を
相違させた場合と同じ様な作用を生じさせることができ
る。本発明に用いられる磁気シールド材料はNiFe,Co-Z
r,Co-Zr-Nb,センダスト等が用いられ、磁気抵抗効果素
子材料はNiFe,NiCo等が用いられ、絶縁層としてはAl
2O3,SiO2等が用いられる。又製造方法はスパッタ法、イ
オンミリング、ケミカルエッチング等を用いる。(Operation and Principle of the Invention) As described above, the shapes of the first and second high-permeability magnetic films having the insulating layers on both sides of the magnetoresistive effect element are made different from each other, whereby the first high-permeability magnetic film is formed. The magnetic susceptibility magnetic film has only a magnetic shield function, and the second high magnetic permeability magnetic film can have both a magnetic shield function and a main magnetic pole function. That is, the shape of the first high-permeability magnetic film is a quadrangle (preferably a rectangle), its long side is parallel to the surface of the perpendicular magnetic recording medium, and the other side is the second high-permeability magnetic film. By making the length shorter than the corresponding side of the magnetic film, the magnetic field cannot be collected because the demagnetizing field becomes large even when the auxiliary magnetic pole is excited due to the shape anisotropy. Further, the shape of the second high-permeability magnetic film having the functions of both the magnetic shield and the main magnetic pole is a quadrangle (preferably a rectangle), and its long side is perpendicular to the magnetic field of the first high-permeability magnetic film. The surface is perpendicular to the surface of the recording medium, and the other side is parallel to the long side of the first high-permeability magnetic film. By doing so, upon excitation from the auxiliary magnetic pole, the recording magnetic field is concentrated only on the second high magnetic permeability magnetic film (single main magnetic pole) having a long side due to shape anisotropy, and the sharp recording magnetic field is generated. Therefore, the recording ability is improved, and at the same time, the magnetization transition written on the perpendicular magnetic recording medium is sharpened to achieve high density recording. Further, the first and second high-permeability magnetic films on both sides do not impair the high-density reproducing characteristic of the magnetoresistive element because the function as a magnetic shield is preserved even if the first and second high-permeability magnetic films have such a shape. The same function can be exhibited by making the magnetic permeability, the saturation magnetic flux density, or the film thickness of the first and second high-permeability magnetic films different from each other. That is, if the first high-permeability magnetic film is a low-permeability film or a small saturation magnetic flux density or a thin film thickness, the recording magnetic field is not concentrated at the time of excitation from the auxiliary magnetic pole, so that it does not function as a main magnetic pole and is simply used during reproduction. It functions only as a magnetic shield. On the other hand, if the second high-permeability magnetic film is a film with a high magnetic permeability or a large saturation magnetic flux density or a thick film, it acts as a main magnetic pole and also functions as a magnetic shield during reproduction. Will also have. Therefore, the operation can produce the same action as when the above-mentioned shapes are different. The magnetic shield material used in the present invention is NiFe, Co-Z.
r, Co-Zr-Nb, sendust, etc. are used, the magnetoresistive element material is NiFe, NiCo, etc., and the insulating layer is Al.
2 O 3 , SiO 2 or the like is used. As the manufacturing method, a sputtering method, ion milling, chemical etching or the like is used.
（実施例） 以下本発明の実施例を第１図(a),(b)を用いて説明す
る。(Examples) Examples of the present invention will be described below with reference to FIGS. 1 (a) and 1 (b).
本発明の実施例の構成を第１図(a),(b)に示し、第１図
(a)にヘッド媒体系の構成を示し、第１図(b)に磁気抵抗
効果素子５からの再生回路系を示す。The configuration of the embodiment of the present invention is shown in FIGS.
FIG. 1A shows the configuration of the head medium system, and FIG. 1B shows the reproducing circuit system from the magnetoresistive effect element 5.
（実施例１） 第１図において、本垂直磁気記録再生ヘッドは樹脂基板
８上の垂直磁気記録媒体１の一方の面に対向する様に設
けられた磁気抵抗効果素子５(Ni-Fe)と、該磁気抵抗効
果素子５の両側に絶縁層９(SiO2)を介して設けられた第
１及び第２の高透磁率磁性膜４及び３（400μｍ×100μ
ｍの長方形のNiFe膜）と、これらと垂直磁気記録媒体を
介して反対側の面に設けられたコイル６を巻いた補助磁
極２（Mn-Znフェライト材料）とにより構成された。記
録時には、記録回路系１９により、コイル６へ記録電流
を流して記録し、再生時には、磁気抵抗効果素子５より
再生された信号は再生回路系７により処理された。第１
図(a)に示す様に、磁気抵抗効果素子の第１及び第２の
高透磁率磁性膜３，４の形状を長方形（長辺／短辺が望
ましくは３倍以上）とし、第２の高透磁率磁性膜３の長
方形の長辺を垂直磁気記録媒体１の面に対して垂直方向
になる様にし、かつ第１の高透磁率磁性膜４の対応する
辺の長さより長くなるようにし、第１の高透磁率磁性膜
４の長辺を垂直磁化記録媒体１の面に対して平行になる
様にし、かつ第２の高透磁率磁性膜３の対応する辺の長
さより長くなるようにし、パーマロイ膜を第１及び第２
の高透磁率磁性膜として採用し、長方形の形状を400μ
ｍ×100μｍとして作製し、一方の長方形を磁気シール
ド層４とし、他方の長方形を主磁極（磁気シールド機能
も含む）３として両側の高透磁率磁性膜の磁化容易軸を
垂直磁気記録媒体の面と平行になる様に作製した。この
結果第２の高透磁率磁性膜（主磁極）のみによって記録
されており、100KBPI（BPI＝１インチ当りのビット数）
以上の高密度まで記録が可能であることが確認され、再
生ヘッドとしても50KBPI以上で動作可能であった。これ
により高密度の記録再生が可能な高性能の垂直磁気記録
再生ヘッドが得られた。(Embodiment 1) In FIG. 1, the perpendicular magnetic recording / reproducing head comprises a magnetoresistive effect element 5 (Ni-Fe) provided so as to face one surface of the perpendicular magnetic recording medium 1 on a resin substrate 8. , The first and second high-permeability magnetic films 4 and 3 (400 μm × 100 μ) provided on both sides of the magnetoresistive element 5 with an insulating layer 9 (SiO 2 ) interposed therebetween.
m rectangular NiFe film) and an auxiliary magnetic pole 2 (Mn-Zn ferrite material) wound with a coil 6 provided on the opposite surface of the NiFe film with the perpendicular magnetic recording medium interposed therebetween. At the time of recording, a recording current was made to flow to the coil 6 by the recording circuit system 19 for recording, and at the time of reproducing, the signal reproduced by the magnetoresistive effect element 5 was processed by the reproducing circuit system 7. First
As shown in FIG. 3A, the shapes of the first and second high-permeability magnetic films 3 and 4 of the magnetoresistive effect element are rectangular (long sides / short sides are preferably three times or more), and The long side of the rectangle of the high-permeability magnetic film 3 is arranged in the direction perpendicular to the surface of the perpendicular magnetic recording medium 1 and longer than the corresponding side of the first high-permeability magnetic film 4. , So that the long side of the first high-permeability magnetic film 4 is parallel to the surface of the perpendicular magnetization recording medium 1 and longer than the corresponding side of the second high-permeability magnetic film 3. The first and second permalloy films.
Adopted as a high permeability magnetic film of
m × 100 μm, one rectangle as the magnetic shield layer 4 and the other rectangle as the main magnetic pole (including the magnetic shield function) 3 with the easy magnetic axes of the high permeability magnetic films on both sides as the plane of the perpendicular magnetic recording medium. It was made to be parallel to. As a result, only the second high-permeability magnetic film (main magnetic pole) is recorded, and 100KBPI (BPI = the number of bits per inch).
It was confirmed that high-density recording was possible, and it was possible to operate as a reproducing head at 50KBPI or higher. As a result, a high-performance perpendicular magnetic recording / reproducing head capable of high-density recording / reproducing was obtained.
（実施例２） 本実施例の構成は第１図（ａ）と同じで、磁気抵抗効果
素子の両側の第１及び第２の高透磁率磁性膜４及び３の
透磁率μを相違させた。第１の高透磁率磁性膜４の透磁
率μ１を小さく５００とし、第２の高透磁率磁性膜３の
透磁率μ２（μ２＞μ１）を大きく２０００とした。そ
の結果、第１の高透磁率磁性膜４が磁気シールド効果の
みの機能を有し、第２の高透磁率磁性膜３が主磁極と磁
気シールドの両方の機能を有する垂直磁気記録再生ヘッ
ドが得られた。なお、第２図（ｃ）の構成において、第
１の高透磁率磁性膜１４を小さい透磁率μ１とし、第２
の高透磁率磁性膜１８を大きい透磁率μ２（μ２＞μ
１）としても本発明の効果が発揮されることは言うまで
もない。Example 2 The configuration of this example is the same as that of FIG. 1A, but the magnetic permeability μ of the first and second high magnetic permeability magnetic films 4 and 3 on both sides of the magnetoresistive effect element is different. . The magnetic permeability μ1 of the first high-permeability magnetic film 4 was set small to 500, and the magnetic permeability μ2 (μ2> μ1) of the second high-permeability magnetic film 3 was set large to 2000. As a result, the perpendicular magnetic recording / reproducing head in which the first high-permeability magnetic film 4 has a function only for the magnetic shield effect and the second high-permeability magnetic film 3 has both the main magnetic pole and the magnetic shield functions. Was obtained. In the configuration of FIG. 2 (c), the first high-permeability magnetic film 14 has a small magnetic permeability μ1,
Of the high magnetic permeability magnetic film 18 having a large magnetic permeability μ2 (μ2> μ)
Needless to say, the effect of the present invention is exerted even as 1).
（実施例３） 本実施例の構成は第１図（ａ）と同じで、磁気抵抗効果
素子の両側の第１及び第２の高透磁率磁性膜４及び３の
飽和磁束密度ＢＳを相違させた。第１の高透磁率磁性膜
４の飽和磁束密度ＢＳ１をＣｏ−Ｚｒ−Ｎｂを用いて小
さくし、５０００ガウスとし、第２の高透磁率磁性膜３
の飽和磁束密度ＢＳ２（ＢＳ２＞ＢＳ１）をＣｏ−Ｚｒ
膜を用いて大きくし、１４０００ガウスとした。この構
成で実施例１と同じ効果が得られた。(Embodiment 3) The configuration of this embodiment is the same as that of FIG. 1A, but the saturation magnetic flux densities BS of the first and second high magnetic permeability magnetic films 4 and 3 on both sides of the magnetoresistive effect element are made different. It was The saturation magnetic flux density BS1 of the first high-permeability magnetic film 4 is reduced to 5000 gauss by using Co-Zr-Nb, and the second high-permeability magnetic film 3 is formed.
Of saturated magnetic flux density BS2 (BS2> BS1) of Co-Zr
It was enlarged using a membrane to 14000 Gauss. With this configuration, the same effect as in Example 1 was obtained.
（実施例４） 本実施例は前記実施例３において、第１の高透磁率磁性
膜の膜厚t1（200Å）を高透磁率磁性膜の膜厚t2（4000
Å）より小さくした作製した。この場合でも前述の効果
が得られた。(Embodiment 4) In this embodiment, the thickness t 1 (200Å) of the first high-permeability magnetic film in Embodiment 3 is changed to the thickness t 2 (4000) of the high-permeability magnetic film.
Å) It was made smaller than. Even in this case, the above-mentioned effect was obtained.
（発明の効果） 以上の実施例により構成した垂直磁気記録再生ヘッドは
第２の高透磁率磁性膜のみが主磁極となり、第１の高透
磁率磁性膜が磁気シールド機能のみとなり、記録磁場は
単一の主磁極に集中し鋭くなるので、高密度記録の能力
が増大し、又両側を磁気シールドで挟まれた高分解能の
磁気抵抗効果素子を用いていることになるために高トラ
ック密度及び高線密度の記録再生時に大きな再生出力を
得ることができる。(Effects of the Invention) In the perpendicular magnetic recording / reproducing head constructed according to the above-described embodiment, only the second high-permeability magnetic film serves as the main magnetic pole, the first high-permeability magnetic film serves only the magnetic shield function, and the recording magnetic field is Since it concentrates on a single main pole and becomes sharp, the capacity for high density recording increases, and since a high resolution magnetoresistive effect element sandwiched by magnetic shields on both sides is used, high track density and A large reproduction output can be obtained at the time of recording / reproduction with high linear density.
第１図(a)，(b)は本発明の構成の実施例を示す図、第２
図は従来の垂直磁気記録再生ヘッドの構成図である。 図において、１は垂直磁気記録媒体、８は樹脂基板、３
は第２の高透磁率磁性膜、４は第１の高透磁率磁性膜、
９は絶縁層、２は補助磁極、６はコイル、１９は記録回
路系、２０は抵抗、７は再生回路系、10,11,14,18は主
磁極、5,13,17は磁気抵抗効果素子、15,16は絶縁層をそ
れぞれ示す。1 (a) and 1 (b) are views showing an embodiment of the constitution of the present invention, and FIG.
The figure is a block diagram of a conventional perpendicular magnetic recording / reproducing head. In the figure, 1 is a perpendicular magnetic recording medium, 8 is a resin substrate, 3
Is a second high-permeability magnetic film, 4 is a first high-permeability magnetic film,
9 is an insulating layer, 2 is an auxiliary magnetic pole, 6 is a coil, 19 is a recording circuit system, 20 is a resistor, 7 is a reproducing circuit system, 10, 11, 14, 18 are main magnetic poles, 5, 13, 17 are magnetoresistive effects Elements, 15 and 16 are insulating layers, respectively.
Claims (5)
に設けられた磁気抵抗効果素子と、該磁気抵抗効果素子
の両側に絶縁層を介して設けられた第１及び第２の高透
磁率磁性膜と、前記垂直磁気記録媒体の他方の面に対向
し、かつ前記第１及び第２の磁極の端面に対向する様に
設けられた第３の高透磁率磁性材よりなる補助磁極と、
該補助磁極に巻かれたコイルとからなる垂直磁気記録再
生ヘッドにおいて、前記第１及び第２の高透磁率磁性膜
の形状が互に異なり、媒体の走行方向に対し、前方に位
置する第１の高透磁率磁性膜の形状が前記垂直磁気記録
媒体の面に平行な方向が長辺である四角形であり、媒体
の走行方向に対し、後方に位置する前記第２の高透磁率
磁性膜の形状が前記垂直磁気記録媒体の面に垂直な方向
が長辺である四角形であることを特徴とする垂直磁気記
録再生ヘッド。1. A magnetoresistive effect element provided so as to face one surface of a perpendicular magnetic recording medium, and first and second high resistance elements provided on both sides of the magnetoresistive effect element with an insulating layer interposed therebetween. An auxiliary magnetic pole composed of a magnetic permeability magnetic film and a third high magnetic permeability magnetic material provided so as to face the other surface of the perpendicular magnetic recording medium and to face the end faces of the first and second magnetic poles. When,
In a perpendicular magnetic recording / reproducing head including a coil wound around the auxiliary magnetic pole, the first and second high-permeability magnetic films have different shapes, and the first magnetic film is located in front of the traveling direction of the medium. The shape of the high magnetic permeability magnetic film is a quadrangle having a long side in a direction parallel to the surface of the perpendicular magnetic recording medium, and the shape of the second high magnetic permeability magnetic film located rearward with respect to the traveling direction of the medium is A perpendicular magnetic recording / reproducing head having a shape of a quadrangle having a long side in a direction perpendicular to the surface of the perpendicular magnetic recording medium.
設けられた第１及び第２の高透磁率磁性膜の透磁率が異
なり、第１の高透磁率磁性膜の透磁率μ１が第２の高透
磁率磁性膜の透磁率μ２より小さい特許請求の範囲第１
項に記載の垂直磁気記録再生ヘッド。2. The magnetic permeability of the first and second high-permeability magnetic films provided on both sides of the magnetoresistive element with an insulating layer interposed therebetween is different, and the magnetic permeability of the first high-permeability magnetic film is μ 1. Is smaller than the magnetic permeability μ 2 of the second high-permeability magnetic film.
A perpendicular magnetic recording / reproducing head according to the item 1.
設けられた第１及び第２の高透磁率磁性膜の中、第１の
高透磁率磁性膜の飽和磁束密度Bs1が第２の高透磁率磁
性膜の飽和磁束密度Bs2より小さい特許請求の範囲第１
項に記載の垂直磁気記録再生ヘッド。3. The saturation magnetic flux density Bs 1 of the first high-permeability magnetic film is the first among the first and second high-permeability magnetic films provided on both sides of the magnetoresistive element with an insulating layer interposed therebetween. The saturation magnetic flux density Bs 2 of the high-permeability magnetic film of 2 is smaller than that of Claim 1.
A perpendicular magnetic recording / reproducing head according to the item 1.
設けられた第１及び第２の高透磁率磁性膜の中、第１の
高透磁率磁性膜の膜厚t1が第２の高透磁率磁性膜の膜厚
t2より小さい特許請求の範囲第１項に記載の垂直磁気記
録再生ヘッド。4. The film thickness t 1 of the first high-permeability magnetic film is the second among the first and second high-permeability magnetic films provided on both sides of the magnetoresistive element with an insulating layer interposed therebetween. High permeability magnetic film thickness
The perpendicular magnetic recording / reproducing head according to claim 1, which is smaller than t 2 .
率磁性膜の長辺は他方の高透磁率磁性膜の短辺より長い
特許請求の範囲第１項記載の垂直磁気記録再生ヘッド。5. The perpendicular magnetic recording / reproducing according to claim 1, wherein one of the two high magnetic permeability magnetic films has a long side longer than a short side of the other high magnetic permeability magnetic film. head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22322884A JPH065564B2 (en) | 1984-10-24 | 1984-10-24 | Perpendicular magnetic recording / reproducing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22322884A JPH065564B2 (en) | 1984-10-24 | 1984-10-24 | Perpendicular magnetic recording / reproducing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61104407A JPS61104407A (en) | 1986-05-22 |
| JPH065564B2 true JPH065564B2 (en) | 1994-01-19 |
Family
ID=16794797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22322884A Expired - Lifetime JPH065564B2 (en) | 1984-10-24 | 1984-10-24 | Perpendicular magnetic recording / reproducing head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065564B2 (en) |
-
1984
- 1984-10-24 JP JP22322884A patent/JPH065564B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61104407A (en) | 1986-05-22 |
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