JPS588051B2 - Magnetoresistive head - Google Patents
Magnetoresistive headInfo
- Publication number
- JPS588051B2 JPS588051B2 JP50005330A JP533075A JPS588051B2 JP S588051 B2 JPS588051 B2 JP S588051B2 JP 50005330 A JP50005330 A JP 50005330A JP 533075 A JP533075 A JP 533075A JP S588051 B2 JPS588051 B2 JP S588051B2
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- Prior art keywords
- magnetic
- ferromagnetic
- film
- ferromagnetic film
- head
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Description
【発明の詳細な説明】
本発明はシールド効果を有し、かつ空隙部と同一平面内
に磁気抵抗効果素子（以下単にＭＲ素子という）を有す
る磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head that has a shielding effect and has a magnetoresistive element (hereinafter simply referred to as an MR element) in the same plane as a gap.
磁気抵抗効果を利用した磁気ヘッドとして、短冊状強磁
性膜を記録媒体に水平に当近接させるいわゆる水平型磁
気抵抗効果型ヘッドと、短冊状強磁性膜を記録媒体に垂
直に当近接させるいわゆる垂直型磁気抵抗効果型ヘッド
とがある。As magnetic heads that utilize the magnetoresistive effect, there are so-called horizontal magnetoresistive heads in which a strip-shaped ferromagnetic film approaches the recording medium horizontally, and so-called vertical magnetoresistive heads in which the strip-shaped ferromagnetic film approaches the recording medium perpendicularly. There is a type magnetoresistive head.
前者は耐摩耗性に乏しいという欠点をもっており、後者
はこのような欠点を改善できるが、記録媒体からの信号
磁界がＭＲ素子の巾方向で指数関数的に減衰するため、
この素子内の磁束密度分布が不均一になり、微小な信号
磁界を効率よく利用できないという欠点をもっている。The former has the disadvantage of poor wear resistance, and the latter can improve this disadvantage, but since the signal magnetic field from the recording medium decays exponentially in the width direction of the MR element,
This device has the disadvantage that the magnetic flux density distribution within the device becomes non-uniform, making it impossible to efficiently utilize the minute signal magnetic field.
このような欠点を改善する磁気抵抗効果型ヘッドとして
、第１図に示すような、記録媒体７からの信号磁束を磁
気空隙部３で検出し、ＭＲ素子５へ導く磁束収束型の磁
気抵抗効果型ヘッドがある。As a magnetoresistive head that improves these drawbacks, a magnetic flux convergence type magnetoresistive head is used, as shown in FIG. There is a type head.
この種のヘッドでは、通常、ガラス等の非磁性絶縁体の
基板１上に、真空蒸着、電着あるいはスパッタリングな
どの方法でＦ ｅ −Ｎ ｉ合金やＡＩ−Ｆｅ−Ｓｉ合
金などの強磁性膜２を形成し、ホトエッチングなどの手
法で所定のパターンが形成される。In this type of head, a ferromagnetic film such as a Fe-Ni alloy or an AI-Fe-Si alloy is usually deposited on a substrate 1 made of a non-magnetic insulator such as glass by vacuum deposition, electrodeposition, or sputtering. 2 is formed, and a predetermined pattern is formed by a method such as photo-etching.
パターンエッチされた強磁性膜２は、第１図に示される
ように、磁気空隙部３を有する磁束収束コア部４、磁気
抵抗効果素子部（以下ＭＲ素子部と称す）５、そしてＭ
Ｒ素子部５に一定電流ｉを供給するための電流端子部６
で構成される。As shown in FIG. 1, the pattern-etched ferromagnetic film 2 includes a magnetic flux converging core section 4 having a magnetic gap section 3, a magnetoresistive element section (hereinafter referred to as MR element section) 5, and a
A current terminal section 6 for supplying a constant current i to the R element section 5
Consists of.
このようなヘッドにおいては、記録媒体７からの信号磁
束を効率よ＜ＭＲ素子部５に収束することができ、かつ
ＭＲ素子５中の磁束密度も一様で信号磁束を有効に利用
できる。In such a head, the signal magnetic flux from the recording medium 7 can be efficiently focused on the MR element section 5, and the magnetic flux density in the MR element 5 is also uniform, so that the signal magnetic flux can be used effectively.
したがって、より広いダイナミックレンジが得られる。Therefore, a wider dynamic range can be obtained.
さらに耐摩耗性も実用上問題ないものが得られる。Furthermore, wear resistance that poses no practical problems can be obtained.
また、強磁性膜２の厚みがトラック巾となるので、２μ
ｍ〜２００Åといったきわめて狭いトラック幅を有する
ヘッドも容易に実現することができる。In addition, since the thickness of the ferromagnetic film 2 becomes the track width, 2μ
Heads with extremely narrow track widths, such as m to 200 Å, can also be easily realized.
このようなヘッドを再生ヘッドとして使うことにより、
きわめて狭いトラック上の信号を再生することができ、
記録媒体上の単位長さ当りのトラック数を著しく増加す
ることが可能となり、記録面密度を大巾に増大させ得る
ことが期待できる。By using such a head as a playback head,
Can reproduce signals on extremely narrow tracks,
It is possible to significantly increase the number of tracks per unit length on a recording medium, and it is expected that the recording surface density can be greatly increased.
しかし、このようにトラック巾が極度に狭くなり、トラ
ック間ピッチが小さくなった場合には、所定のトラック
からの信号を検出すると同時に、他のトランク、すなわ
ち主として隣接トランクからの信号も再生するという大
きな問題がある。However, when the track width becomes extremely narrow and the inter-track pitch becomes small, signals from other trunks, mainly adjacent trunks, are also played back at the same time as signals from a given track are detected. There's a big problem.
例として第１図に示すごとく記録媒体７に記録されたト
ランク８，９．１０があり、ヘッドがトランク８上にあ
ってその記録信号を検出しようとする場合、ヘッドの再
生出力は、トラック８からの情報に、隣接したトラック
９，１０からの洩漏磁束による情報が混入したものとな
る。As an example, if there are trunks 8, 9, and 10 recorded on the recording medium 7 as shown in FIG. The information from the adjacent tracks 9 and 10 is mixed with information due to leakage magnetic flux from the adjacent tracks 9 and 10.
この影響の度合はトラック土の記録波長に依存するが、
長波長ほど影響の度合が著しい。The degree of this effect depends on the recording wavelength of the track soil, but
The longer the wavelength, the more significant the effect.
本発明は、第１図に示すよな新規な磁束収束型磁気抵抗
効果型ヘッドにおける隣接トラックからの漏洩磁束検出
という問題点を解決することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the problem of detecting magnetic flux leakage from adjacent tracks in a novel magnetic flux convergence type magnetoresistive head as shown in FIG.
以下、図面を用いて、本発明の実施例について説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第２図ａは本発明の基本構成を示す分解斜視図、同図ｂ
は組立た状態を示す断面図であり、理解を容易にするた
め、第１図で示した基板１を省略して示している。Figure 2a is an exploded perspective view showing the basic configuration of the present invention, Figure 2b
1 is a sectional view showing an assembled state, and the substrate 1 shown in FIG. 1 is omitted for easy understanding.
第２図に示すように、本発明の基本構成は、磁束収束型
の磁気抵抗効果型ヘッドの強磁性膜２のトラック幅方向
の両側で、かつ記録媒体に当近接する側に、ＦｅＮｉ合
金、Ａｌ一Ｆｅ−Ｓｉ合金などからなるシールド部材と
しての強磁性膜１２．１３がそれぞれＳｉＯ，８１０２
などの非磁性絶縁膜１４，１５を介して配置されている
。As shown in FIG. 2, the basic configuration of the present invention is that a FeNi alloy, The ferromagnetic films 12 and 13 as shield members made of Al-Fe-Si alloy, etc. are SiO, 8102, respectively.
They are arranged with nonmagnetic insulating films 14 and 15 interposed therebetween.
非磁性絶縁膜１４，１５の厚みＷが薄いほど強磁性膜１
２．１３を強磁性膜２により近接させることができ、ト
ラック密度が高い場合、隣接トランクからの漏洩磁束を
遮蔽するのに効果的である。The thinner the thickness W of the nonmagnetic insulating films 14 and 15, the more the ferromagnetic film 1
2.13 can be brought closer to the ferromagnetic film 2, and when the track density is high, it is effective in shielding magnetic flux leakage from adjacent trunks.
しかし、その厚みＷをあまり薄くしすぎると、強磁性膜
２の磁気空隙部３での磁気抵抗を低下させ、信号磁束が
ＭＲ素子５に導かれる割合すなわち磁束収束効率を低下
させるので、これらを考慮して適当な厚みが決定される
。However, if the thickness W is made too thin, the magnetic resistance in the magnetic gap 3 of the ferromagnetic film 2 will decrease, and the rate at which the signal magnetic flux is guided to the MR element 5, that is, the magnetic flux convergence efficiency, will decrease. An appropriate thickness is determined in consideration.
そして、非磁性絶縁膜１４．１５の幅Ｌは、強磁性膜１
２，１３を強磁性膜２と電気的に分離するに十分な大き
さでなければならない。The width L of the nonmagnetic insulating film 14.15 is equal to the width L of the ferromagnetic film 1.
2 and 13 must be large enough to electrically separate them from the ferromagnetic film 2.
強磁性膜１２．１３の厚みＷはヘッドの用途とヘッド寸
法との関係および製造方法より決定される。The thickness W of the ferromagnetic films 12 and 13 is determined based on the relationship between the intended use of the head and the dimensions of the head, as well as the manufacturing method.
その幅Ｄは、磁気空隙部３の深さｄと関連して決められ
るが、狭いほど磁束収束効率の点から効果的である。The width D is determined in relation to the depth d of the magnetic gap 3, but the narrower it is, the more effective it is in terms of magnetic flux convergence efficiency.
これら強磁性膜１２，１３、非磁性絶縁膜１４，１５は
真空蒸着、電着、スパッタリング等の手段を用いること
により作製される（以下、これら方法については代表さ
せて蒸着と表現する）。These ferromagnetic films 12, 13 and nonmagnetic insulating films 14, 15 are produced by using means such as vacuum evaporation, electrodeposition, and sputtering (hereinafter, these methods will be typically referred to as evaporation).
第３図は本発明の第１の具体例を示すもので、ガラス等
の非磁性基板１上に順次強磁性膜１３、非磁性膜１５、
強磁性膜２を作製し、この強磁性膜２は所定のパターン
にホ．ナエツチされる。FIG. 3 shows a first specific example of the present invention, in which a ferromagnetic film 13, a nonmagnetic film 15,
A ferromagnetic film 2 is produced, and this ferromagnetic film 2 is formed into a predetermined pattern. Being naughty.
さらにその上に非磁性膜１４と強磁性膜１２が順次蒸着
される。Furthermore, a nonmagnetic film 14 and a ferromagnetic film 12 are sequentially deposited thereon.
第４図は本発明の第２の具体例を示すものであり、同図
ａに示すように、ガラス等の非磁性基板１に溝１９を形
成し、この溝１９に強磁性膜１３を蒸着し、ついで非磁
性膜１５を形成するため、Ｓｉｎ，Ｓｉ０２などの非磁
性膜１６を蒸着形成する。FIG. 4 shows a second specific example of the present invention. As shown in FIG. Then, in order to form a nonmagnetic film 15, a nonmagnetic film 16 such as Sin or Si02 is formed by vapor deposition.
次に基板１の面２０まで切断、研磨し、平滑な面を得る
。Next, the substrate 1 is cut and polished up to the surface 20 to obtain a smooth surface.
この平面上に強磁性膜２を蒸着し、所定のパターンにエ
ッチして形成してから、その上に非磁性絶縁膜１４、強
磁性膜１２を順次蒸着する。A ferromagnetic film 2 is deposited on this plane and etched into a predetermined pattern, and then a nonmagnetic insulating film 14 and a ferromagnetic film 12 are sequentially deposited thereon.
同図ｂは最終的な配置状態を示したものである。Figure b shows the final arrangement state.
第５図は本発明の第３の具体例を示す。FIG. 5 shows a third specific example of the invention.
同図ｂの構成方法は第３図で示した第１の具体例におい
て強磁性膜２を形成するところまで同じであるがそれ以
後の工程が異なる。The construction method shown in FIG. 3B is the same as the first specific example shown in FIG. 3 up to the step of forming the ferromagnetic film 2, but the subsequent steps are different.
すなわち、同図ａに示すように別のガラス等の非磁性保
持板１７の上に強磁性膜１２と非磁性膜１４を順次蒸着
形成し、同図ｂに示すものと同図Ｃに示すようにつきあ
わせ、樹脂１８などで接着一体化する。That is, as shown in Figure A, a ferromagnetic film 12 and a non-magnetic film 14 are sequentially deposited on a non-magnetic holding plate 17 made of another glass, etc. At the same time, they are bonded together using resin 18 or the like.
以上のような構造の磁気抵抗効果型ヘッドにおいては、
強磁性膜１４．１５を強磁性膜２のヘッドトラック幅方
向に近接して配置させることができ、前記強磁性膜１４
．１５は隣接トラックからの漏洩磁束を遮蔽するシール
ド部材として効果的に機能する。In the magnetoresistive head with the above structure,
The ferromagnetic films 14 and 15 can be disposed close to the ferromagnetic film 2 in the head track width direction, and the ferromagnetic film 14
．． 15 effectively functions as a shield member for shielding magnetic flux leakage from adjacent tracks.
第６図に、記録媒体の軸方向ｙに比較的長波長信号が記
録されたトラックｙ１ ，ｙ２ ，ｙ３において、ヘッ
ドをｙ方向に移動させたときの、ヘッド出力の様子を模
式的に示す。FIG. 6 schematically shows the state of the head output when the head is moved in the y direction in tracks y1, y2, y3 on which relatively long wavelength signals are recorded in the axial direction y of the recording medium.
シールド部材をもっていない場合には、隣接トラックの
影響を受け、ｙ方向の分解能はきわめて悪い。If there is no shield member, the resolution in the y direction is extremely poor due to the influence of adjacent tracks.
本発明のようにシールドを施した場合、隣接トラックの
漏洩磁束を効果的に遮幣することができ、シールドがな
い場合に比べて、ｙ方向すなわちトラック幅方向の分解
能をいちぢるしく改善することができる。When shielding is applied as in the present invention, leakage magnetic flux from adjacent tracks can be effectively blocked, and resolution in the y direction, that is, the track width direction, is significantly improved compared to the case without shielding. be able to.
このことはトラッキングを容易にするという効果がある
。This has the effect of facilitating tracking.
またシールドすると、ヘッド出力に混入される隣接トラ
ックからの異った信号成分を大きく低減できるので、デ
イジタル記録の場合には誤動作を少なくすることができ
、またアナログ記録の場合にはいわゆるクロストークを
減少させることができる。In addition, shielding can greatly reduce different signal components from adjacent tracks that are mixed into the head output, reducing malfunctions in digital recording, and reducing so-called crosstalk in analog recording. can be reduced.
さらに具体例に示すように、本発明の構成によれば、基
板上に順次強磁性体と、非磁性体の層を形成していける
ので、マスク蒸着、マスクエッチングなどの手法を有効
に活用することにより、シールド板と磁気抵抗効果型ヘ
ッドの相対位置関係を精度よくしかも容易に制御するこ
とができる。Furthermore, as shown in the specific example, according to the configuration of the present invention, layers of ferromagnetic material and non-magnetic material can be sequentially formed on the substrate, so techniques such as mask evaporation and mask etching can be effectively utilized. As a result, the relative positional relationship between the shield plate and the magnetoresistive head can be precisely and easily controlled.
次に磁気シールド板部のさらに改良された例について、
第７図ａ ｔ ｂｓ第８図ａ−ｄを用いて述べる。Next, regarding a further improved example of the magnetic shield plate section,
This will be described using FIG. 7 at b and FIG. 8 a to d.
第７図ａに示すように、ガラス等の非磁性絶縁体の基板
２７上にＦｅ−Ｎｉ合金、またはＡＩ −Ｆｅ−Ｓｉ合
金よりなる膜状の強磁性部材２１を蒸着、電着、スパッ
タリングなどの方法によって形成する（以下これら方法
を代表して“蒸着”と表現する）。As shown in FIG. 7a, a film-like ferromagnetic member 21 made of Fe-Ni alloy or AI-Fe-Si alloy is deposited on a substrate 27 made of a non-magnetic insulator such as glass by vapor deposition, electrodeposition, sputtering, etc. (hereinafter, these methods will be representatively referred to as "vapor deposition").
．この強磁性部材２１の形状は略凹字状であり、強磁性
膜２２の磁気空隙部と対向する部分でもつとも狭く、か
つ前記磁気空隙部の深さ方向の一部と対向するような形
状を有する。．． The shape of this ferromagnetic member 21 is approximately concave, and is narrow at the portion facing the magnetic gap of the ferromagnetic film 22, and has a shape that faces a part of the magnetic gap in the depth direction. have
ついでＳｉＯまたはＳｉＯ２などからなる非磁性絶縁膜
２３を蒸着形成する。Next, a nonmagnetic insulating film 23 made of SiO or SiO2 is formed by vapor deposition.
さらにその上部に強磁性膜２２を蒸着により形成し、所
定のパターンに、かつ前記強磁性膜２１の最狭部が磁気
空隙部と対向する配置関係となるように、エッチし形成
するこのようにして作製されたものと、ガラスなどの非
磁性保持板２４上に強磁性膜２１と略同一の形状をした
Ｆｅ−Ｎｉ合金、ＡＩＦｅ−Ｓｉ合金などの強磁性膜２
５を蒸着形成し、その上にＳｉ０Ｓｉ０２などの非磁性
絶縁膜１４を蒸着形成したものを、強磁性膜２２と非磁
性絶縁膜２６とが対面するようにして接着する。Further, a ferromagnetic film 22 is formed on top of the ferromagnetic film 22 by vapor deposition, and etched in a predetermined pattern such that the narrowest part of the ferromagnetic film 21 faces the magnetic gap. A ferromagnetic film 2 made of Fe-Ni alloy, AIFe-Si alloy, etc., which has approximately the same shape as the ferromagnetic film 21 on a non-magnetic holding plate 24 made of glass etc.
A nonmagnetic insulating film 14 such as Si0Si02 is formed by vapor deposition thereon, and the ferromagnetic film 22 and the nonmagnetic insulating film 26 are bonded together so that they face each other.
このとき、凹字状強磁性膜２５の最狭部が前記ヘッドの
磁気空隙部の一部と対向するように、組立てる。At this time, it is assembled so that the narrowest part of the concave ferromagnetic film 25 faces a part of the magnetic gap of the head.
第８図に異なる構成を示す。FIG. 8 shows a different configuration.
ガラスなどの非磁性絶縁基板２７とフエライト、センダ
ストなどの強磁性部材２９を略凹字状に加工したものを
ガラスボンデイングし、片面を鏡面研磨する。A nonmagnetic insulating substrate 27 made of glass or the like and a ferromagnetic member 29 made of ferrite or sendust processed into a substantially concave shape are glass bonded and one side is mirror polished.
ガラス２８は基板２７と強磁性部材２９とが形成する空
隙を十分に満たす必要がある。The glass 28 needs to sufficiently fill the gap formed between the substrate 27 and the ferromagnetic member 29.
この鏡面上にＳｉＯやＳｉＯ２などの非磁性絶縁膜３０
、ついで強磁性膜３１を蒸着形成し、この強磁性膜３１
を所定のパターンにエッチする。A non-magnetic insulating film 30 such as SiO or SiO2 is placed on this mirror surface.
Then, a ferromagnetic film 31 is formed by vapor deposition, and this ferromagnetic film 31
etch into a predetermined pattern.
その際、磁気空隙部が前記強磁性部材２９の凹字状部の
最狭部と対向し、かつ磁気空隙部の深さの一部において
対向するパターンにエッチする。At this time, the magnetic gap is etched into a pattern that faces the narrowest part of the concave portion of the ferromagnetic member 29 and faces at a part of the depth of the magnetic gap.
一方、ガラスなどの非磁性絶縁保持板３２に、第８図ａ
，ｂに示すと同様の工程によってガラス３３を用い、フ
エライトやセンダストなどの略凹字状の強磁性部材３４
をガラスボンデイングする。On the other hand, on the non-magnetic insulating holding plate 32 such as glass,
, b, a substantially concave-shaped ferromagnetic member 34 such as ferrite or sendust is formed using glass 33 through the same process.
glass bonding.
この片面を鏡面研磨し、その鏡面上にＳｉＯまたはＳｉ
Ｏ２などの非磁性絶縁膜３５を蒸着形成する。This one side is mirror polished, and SiO or Si is placed on the mirror surface.
A nonmagnetic insulating film 35 made of O2 or the like is formed by vapor deposition.
これらを、強磁性膜３１と非磁性絶縁膜３５が対向する
ように接着される。These are bonded so that the ferromagnetic film 31 and the nonmagnetic insulating film 35 face each other.
第７図ｂ１第８図ｄは、第１、第２の具体例の組立て後
の状態を示すが、実際に使用される際には記録媒体に面
する側は所定の形状になるように、かつ磁気空隙部の深
さが適当な値になるように研磨される。Fig. 7 b1 Fig. 8 d shows the state of the first and second specific examples after assembly, but when actually used, the side facing the recording medium has a predetermined shape. Then, the magnetic gap is polished to an appropriate depth.
以上のように、シールド部材がＭＲ素子部を有する強磁
性膜と平行に配置されるが磁気空隙部ではその深さの一
部がシールド部材と対向するだけであるので、ヘッドの
磁気空隙部の磁気抵抗を極度に低下させることはなく、
したがって記録媒体からの信号磁束がＭＲ素子に収束さ
れる効率をあまり低下させることなく、シールド効果を
発揮し得る。As described above, although the shield member is arranged parallel to the ferromagnetic film having the MR element part, only a part of the depth of the shield member faces the shield member in the magnetic gap part. without significantly lowering magnetic resistance,
Therefore, the shielding effect can be achieved without significantly reducing the efficiency with which the signal magnetic flux from the recording medium is focused on the MR element.
第１図は本発明の適用される磁気抵抗効果型ヘッドの一
例の基本的な構造を示す斜視図、第２図ａは本発明の一
実施例の磁気抵抗効果型ヘッドの基本的な構造を示す分
解斜視図、同図ｂはその組立てた状態を示す断面図、第
３図は同じく他の実施例の構造を示す要部断面図、第４
図ａはさらに他の実施例の構成要素の製造方法を示す断
面図、同図ｂはこの実施例の要部断面図、第５図ａ，ｂ
はさらに他の実施例の突合せ前の状態の構成要素を示す
断面図、同図Ｃはこの実施例の要部断面図第６図は本発
明の磁気抵抗効果型ヘッドでおけるシールド効果の一例
を示す特性図、第７図ａはさらに他の実施例の構成要素
の一つを示す分解斜視図、同図ｂはこの実施例の要部断
面図、第８図ａｂはさらに他の実施例における構成要素
の製造方法を示す図、同図Ｃはこの実施例の要部分解斜
視図、同図ｄは同じく要部断面図である。
１……非磁性絶縁体基板、２……強磁性膜、３……磁気
空隙部、４……磁束収束コア部、５……磁気抵抗効果素
子部、６……電流端子部、１２，１３……強磁性膜、１
４．１５……非磁性絶縁膜、２１……強磁性部材、２２
……強磁性膜、２３……非磁性絶縁膜、２４……保持板
、２５……強磁性膜、２６……非磁性絶縁膜、２７……
非磁性絶縁基板、２８……ガラス、２９……強磁性部材
、３０……非磁性絶縁膜、３１……強磁性膜、３２……
非磁性絶縁保持板、３３……ガラス、３４……強磁性部
材、３５……非磁性絶縁膜。FIG. 1 is a perspective view showing the basic structure of an example of a magnetoresistive head to which the present invention is applied, and FIG. 2a is a perspective view showing the basic structure of a magnetoresistive head according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing the assembled state; FIG.
Figure a is a cross-sectional view showing a method of manufacturing the components of another embodiment, Figure b is a cross-sectional view of the main part of this example, Figures 5a and b
6 is a cross-sectional view showing the components of another embodiment in a state before butt, and FIG. 6C is a cross-sectional view of the main part of this embodiment. FIG. 7a is an exploded perspective view showing one of the components of another embodiment, FIG. 7b is a sectional view of a main part of this embodiment, and FIG. The figure C is an exploded perspective view of the main part of this embodiment, and the figure D is a sectional view of the main part. DESCRIPTION OF SYMBOLS 1...Nonmagnetic insulator substrate, 2...Ferromagnetic film, 3...Magnetic gap part, 4...Magnetic flux convergence core part, 5...Magnetoresistive effect element part, 6...Current terminal part, 12, 13 ...Ferromagnetic film, 1
4.15...Nonmagnetic insulating film, 21...Ferromagnetic member, 22
...Ferromagnetic film, 23...Nonmagnetic insulating film, 24...Holding plate, 25...Ferromagnetic film, 26...Nonmagnetic insulating film, 27...
Nonmagnetic insulating substrate, 28...Glass, 29...Ferromagnetic member, 30...Nonmagnetic insulating film, 31...Ferromagnetic film, 32...
Nonmagnetic insulating holding plate, 33...Glass, 34...Ferromagnetic member, 35...Nonmagnetic insulating film.
Claims (1)
子と電流端子部とが同一平面上に一体に形成されており
、かつトラック幅方向の両側に非磁性絶縁膜を介して強
磁性膜がトラック幅方向に積層されていることを特徴と
する磁気抵抗効果型ヘッド。 ２ 磁気空隙部を有する磁束収束コア、および前記磁気
空隙部と同一平面上に磁気抵抗効果素子を有し、さらに
トラック幅方向め両側に近接して、前記空隙部近傍に対
向する部分で略凹字状を呈しかつ前記凹字状部分の最狭
部が前記磁気空隙部と対向する強磁性部材が配置されて
いること番特徴とする磁気抵抗効果型ヘッド。[Claims] 1. A magnetic flux convergence core having a magnetic gap, a magnetoresistive element, and a current terminal are integrally formed on the same plane, and a non-magnetic insulating film is interposed on both sides in the track width direction. A magnetoresistive head characterized in that ferromagnetic films are laminated in the track width direction. 2. A magnetic flux converging core having a magnetic gap, and a magnetoresistive element on the same plane as the magnetic gap, and further having a substantially concave portion adjacent to both sides in the track width direction and facing the vicinity of the gap. 1. A magnetoresistive head, characterized in that a ferromagnetic member is disposed in the shape of a letter and the narrowest part of the concave part faces the magnetic gap.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50005330A JPS588051B2 (en) | 1975-01-09 | 1975-01-09 | Magnetoresistive head |
| GB5151275A GB1506508A (en) | 1974-12-20 | 1975-12-16 | Magnetic head |
| US05/641,185 US4071868A (en) | 1974-12-20 | 1975-12-16 | Narrow track MR head with side shields |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50005330A JPS588051B2 (en) | 1975-01-09 | 1975-01-09 | Magnetoresistive head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5180209A JPS5180209A (en) | 1976-07-13 |
| JPS588051B2 true JPS588051B2 (en) | 1983-02-14 |
Family
ID=11608220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50005330A Expired JPS588051B2 (en) | 1974-12-20 | 1975-01-09 | Magnetoresistive head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588051B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53126618U (en) * | 1977-03-14 | 1978-10-07 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS439959Y1 (en) * | 1965-06-30 | 1968-04-30 | ||
| JPS4871214A (en) * | 1971-12-20 | 1973-09-27 |
-
1975
- 1975-01-09 JP JP50005330A patent/JPS588051B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS439959Y1 (en) * | 1965-06-30 | 1968-04-30 | ||
| JPS4871214A (en) * | 1971-12-20 | 1973-09-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5180209A (en) | 1976-07-13 |
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