JPH02128312A - Composite type thin film magnetic head - Google Patents
Composite type thin film magnetic headInfo
- Publication number
- JPH02128312A JPH02128312A JP28173288A JP28173288A JPH02128312A JP H02128312 A JPH02128312 A JP H02128312A JP 28173288 A JP28173288 A JP 28173288A JP 28173288 A JP28173288 A JP 28173288A JP H02128312 A JPH02128312 A JP H02128312A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- magnetic material
- head
- back gap
- gap
- 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
- 239000010409 thin film Substances 0.000 title claims description 15
- 239000002131 composite material Substances 0.000 title claims description 12
- 230000000694 effects Effects 0.000 claims abstract description 6
- 239000000696 magnetic material Substances 0.000 abstract description 14
- 238000004804 winding Methods 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229910001845 yogo sapphire 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
- G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
Landscapes
- Magnetic Heads (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、磁気記憶装置の磁気ヘッドに関するもので、
特に記録及び再生兼用であり、高再生出力、低記録電流
をもつ高性能複合型薄膜磁気ヘラ低記録電流で記録可能
で、ギャップ長も巻線型磁気ヘッドと同等に小さくでき
高記録密度で高出力が得られる高性能な複合型薄膜磁気
ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic head of a magnetic storage device.
In particular, it is a high-performance composite thin film magnetic spatula that can be used for both recording and reproduction, and has high reproduction output and low recording current.It can record with low recording current, and the gap length can be made as small as that of a wire-wound magnetic head, resulting in high recording density and high output. The present invention relates to a high-performance composite thin-film magnetic head that provides high performance.
従来の技術
従来の薄膜ヘッドの構造を第２図、第３図及び第４図に
基づき説明する。第２図は巻線形薄膜ヘッドの一例を示
す断面図である。図示のごとく下部磁性体磁極ｌと、そ
の上にギャップ層２を介して形成される第一の絶縁層３
とその上に形成される導電コイル４と、その上に形成さ
れる第二の絶縁層５と、その上に形成される上部磁性体
磁極６とを積層して構成される。2. Description of the Related Art The structure of a conventional thin film head will be explained with reference to FIGS. 2, 3, and 4. FIG. 2 is a sectional view showing an example of a wound thin film head. As shown in the figure, a lower magnetic pole l and a first insulating layer 3 formed thereon with a gap layer 2 interposed therebetween.
, a conductive coil 4 formed thereon, a second insulating layer 5 formed thereon, and an upper magnetic pole 6 formed thereon.
第２図のごとき巻線形のヘッドにおいては、その再生出
力を増大させるには媒体との相対速度を増加させるか巻
線数を増加させねばならず、その製造技術は限界に近づ
きつつある。In order to increase the reproduction output of a winding type head as shown in FIG. 2, it is necessary to increase the relative speed with respect to the medium or increase the number of windings, and the manufacturing technology is approaching its limit.
第３図に磁気抵抗型のヘッドを示す。同図（Ａ）は記録
媒体７と磁気抵抗効果素子８が接触するシールド型磁気
抵抗型ヘッドで、９はシールド用の軟磁性体である。同
図（Ｂ）は記録媒体７と磁気抵抗効果素子８が接触しな
いヨーク型磁気抵抗型ヘッドである。このような磁気抵
抗型ヘッドでは再生出力は巻線型に比して約１０倍大き
いが、再生専用であり媒体上に記録することはできない
。FIG. 3 shows a magnetoresistive head. FIG. 2A shows a shielded magnetoresistive head in which a recording medium 7 and a magnetoresistive element 8 are in contact, and 9 is a soft magnetic material for shielding. FIG. 2B shows a yoke-type magnetoresistive head in which the recording medium 7 and the magnetoresistive element 8 do not come into contact with each other. Although the reproduction output of such a magnetoresistive head is about 10 times greater than that of a wire-wound type head, it is only for reproduction and cannot be used for recording on a medium.
このような問題を解決するために、第４図に示すような
巻線型と磁気抵抗型を合わせた複合型ヘッドが提案され
ている。同図（Ａ）は第３図（Ａ）に示すシールド型磁
気抵抗型ヘッドと巻線型の複合型である（Ｕ、Ｓ、Ｐａ
ｔｅｎｔ ４．５０４．８８０）。短波長領域で記録
再生するためにはギャップ長１５を小さくする必要があ
るが該ヘッドは構造上ギャップ長に限界があり、即ち高
記録密度の限界がある。同図（Ｂ）はヨーク型と巻線型
の複合型である（特開昭６１−４８１６号公報参照）。In order to solve these problems, a composite head combining a wire-wound type and a magnetoresistive type as shown in FIG. 4 has been proposed. Figure 3(A) shows a composite type of the shielded magnetoresistive head shown in Figure 3(A) and the wire-wound type (U, S, Pa
tent 4.504.880). In order to perform recording and reproduction in a short wavelength region, it is necessary to reduce the gap length 15, but the head has a structural limit to the gap length, that is, there is a limit to high recording density. The figure (B) shows a composite type of a yoke type and a winding type (see Japanese Patent Laid-Open No. 61-4816).
このヘッドは、ヨークの一部が欠落しているため記録時
に十分な飽和磁束密度を得るためには大きな記録ｔＬ流
が必要になる。Since this head is missing a portion of the yoke, a large recording tL current is required to obtain a sufficient saturation magnetic flux density during recording.
発明が解決しようとする課題
このように、高密度記録において高性能なヘッドを得る
ためには、ギャップ長を十分小さくできること及び記録
電流を小さくすることが必要であり、前記従来例ではこ
れら諸点が十分溝たされな本発明は、このような従来の
磁気ヘッドの課題に鑑み、低記録電流で記録可能で、ギ
ャップ長も巻線型磁気ヘッドと同等に小さくでき高記録
密度で高出力が得られる高性能な複合型薄膜磁気ヘッド
を提供することを目的とする。Problems to be Solved by the Invention As described above, in order to obtain a high-performance head for high-density recording, it is necessary to make the gap length sufficiently small and to reduce the recording current. In view of these problems with conventional magnetic heads, the present invention, which has sufficient grooves, can record with low recording current, has a gap length as small as that of a wire-wound magnetic head, and can obtain high output with high recording density. The purpose is to provide a high-performance composite thin-film magnetic head.
課題を解決するための手段
本発明は、下部磁性体磁極と、上部磁性体磁極と導電コ
イルからなる巻線型薄膜磁気ヘッドにおいて、バックギ
ャップ部周辺の下部磁性体磁極、バックギャップ、上部
磁性体磁極からなる斜面上に磁気抵抗効果素子の一部分
が下部磁性体磁極及び上部磁性体磁極と重なりを持って
形成されている複合型薄膜磁気ヘッドである。Means for Solving the Problems The present invention provides a wire-wound thin film magnetic head consisting of a lower magnetic pole, an upper magnetic pole, and a conductive coil, in which the lower magnetic pole around the back gap, the back gap, and the upper magnetic pole This is a composite thin-film magnetic head in which a part of a magnetoresistive element is formed on a slope formed by a lower magnetic pole and an upper magnetic pole so as to overlap with each other.
作用
本発明は、この様な構成により、バックギャップで上部
磁性体磁極と下部磁性体磁極が対向する面積は大きくと
れ、また、バックギャップの厚みは薄くできるので、従
来例のようにヨークの一部が欠落しているものに比べて
その空隙の磁気抵抗は小さくてき、導電コイルによる記
録効率は向上し、低記録ｉｉ流が可能になる。また、再
生時には記録媒体から流入した磁束は、バックギャップ
部ではほとんど流れず、バックギャップ部周辺に設けら
れた磁気抵抗効果素子に集束され高出力が得られる。Effect of the present invention With such a configuration, the area in which the upper magnetic pole and the lower magnetic pole face each other in the back gap can be increased, and the thickness of the back gap can be made thinner, so that the yoke can be made thinner than in the conventional example. The magnetic resistance of the gap is smaller than that of a gap with a missing portion, and the recording efficiency by the conductive coil is improved, making it possible to perform low recording current. Furthermore, during reproduction, almost no magnetic flux flows from the recording medium in the back gap portion, and is focused on the magnetoresistive element provided around the back gap portion, resulting in high output.
また、バックギャップ部周辺で下部磁性体磁極と上部磁
性体磁極がバックギャップを挟んで対向している全ての
斜面上に磁気抵抗効果素子を設けることができるのでト
ラック幅が狭いヘッドにおいても、磁気抵抗効果素子の
全長を長くすることができ再生出力の低下を抑えること
ができる。In addition, magnetoresistive elements can be provided on all slopes around the back gap where the lower magnetic pole and the upper magnetic pole face each other across the back gap, so even in a head with a narrow track width, the magnetic The total length of the resistive effect element can be increased, and a reduction in reproduction output can be suppressed.
また磁気ギャップ部は従来の巻線型と同じで高記録密度
化に対応できる狭ギャップ化が可能である。Furthermore, the magnetic gap portion is the same as that of the conventional wire-wound type, and can be made narrower to accommodate higher recording densities.
実施例
以下、本発明の実施例を第１図（Ａ）（Ｂ）に基づいて
説明する。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1(A) and (B).
第１図（Ａ）（Ｂ）は本発明の複合型薄膜磁気ヘッドを
示し、同図（Ａ）はその平面図、同図（Ｂ）は同図（Ａ
）のＡ−Ａ’断面である。第１図中で、第２〜第４図と
同一記号は同一構成物を示す。第１図において、１は下
部磁性体磁極で軟磁性材料で形成し、所定形状にバター
ニングする。1(A) and 1(B) show a composite thin film magnetic head of the present invention, FIG. 1(A) is a plan view thereof, and FIG.
). In FIG. 1, the same symbols as in FIGS. 2 to 4 indicate the same components. In FIG. 1, reference numeral 1 denotes a lower magnetic pole made of a soft magnetic material and patterned into a predetermined shape.
次に、配下部磁性体磁極ｌ上のへラドギャップが構成さ
れる部分に、所定厚のギャップ層２を形成し、その上に
下部磁性体磁極ｌと導電コイル４との電気的絶縁をとる
ため、及びバックギャップを形成するために第一の絶縁
層３を形成し、その上に導電コ、イル４を形成する。更
に、導電コイル４と上部磁性体磁極６とを絶縁するため
に第二の絶縁層５を形成し、その上に上部磁性体磁極６
を軟磁性材料で形成する。次に、バックギャップ部周辺
の下部磁性体磁極１、絶縁層３、上部磁性体磁極６に斜
面を形成する。さらに斜面上に磁気抵抗効果素子８と上
部磁性体磁極６とを絶縁するために第３の絶縁層ｌＯを
形成し、その上に磁気抵抗効果素子８を形成する。Next, a gap layer 2 of a predetermined thickness is formed on the portion of the lower magnetic pole l where the Herad gap is formed, and electrical insulation between the lower magnetic pole l and the conductive coil 4 is provided thereon. A first insulating layer 3 is formed to form a back gap and a back gap, and a conductive layer 4 is formed thereon. Further, a second insulating layer 5 is formed to insulate the conductive coil 4 and the upper magnetic pole 6, and the upper magnetic pole 6 is formed on the second insulating layer 5.
is made of soft magnetic material. Next, slopes are formed on the lower magnetic pole 1, the insulating layer 3, and the upper magnetic pole 6 around the back gap portion. Further, a third insulating layer IO is formed on the slope to insulate the magnetoresistive element 8 and the upper magnetic pole 6, and the magnetoresistive element 8 is formed thereon.
以上の各薄膜プロセスにおいて、軟磁性材料としてはパ
ーマロイやアモルファスの真空蒸着膜もしくはスパッタ
膜が、磁気抵抗効果素子材料とじ−ＣはパーマロイやＮ
ｉ−Ｃｏの真空蒸着膜もしくはスパッタ膜が、また導電
コイル層としては、ＣｕやＡｔの真空蒸着膜もしくは電
着膜が、絶縁層としては５１０２やＡｌ２Ｏ３のスパッ
タ膜もしくはフォトレジスト等の有機絶縁材が適する。In each of the above thin film processes, the soft magnetic material is a permalloy or amorphous vacuum-deposited film or a sputtered film, and the magnetoresistive element material -C is permalloy or N.
A vacuum deposited or sputtered film of i-Co is used, a vacuum deposited or electrodeposited film of Cu or At is used as the conductive coil layer, and a sputtered film of 5102 or Al2O3 or an organic insulating material such as photoresist is used as the insulating layer. is suitable.
通常、磁気抵抗効果の再生出力を増大するためにバイア
ス磁界が必要であるが、本発明の場合、コイルに微小電
流を流すことによっであるいは磁気抵抗効果素子を二重
構造にすることによりシャントバイアスも可能である。Normally, a bias magnetic field is required to increase the reproduction output of the magnetoresistive effect, but in the case of the present invention, the shunt is created by passing a minute current through the coil or by creating a double structure of the magnetoresistive element. Bias is also possible.
発明の詳細
な説明したように本発明によると、記録効率のよい巻線
型薄膜磁気ヘッドと、狭トラツク時においても再生出力
の高い磁気抵抗効果型ヘッドが併設され記録及び再生が
同一ヘッドで行なわれるので、低記録電流で記録可能で
、ギャップ長も巻線型磁気ヘッドと同等に小さくでき高
記録密度で高出力が得られる高性能な複合型薄膜磁気ヘ
ッドが得られる。As described in detail, according to the present invention, a wire-wound thin film magnetic head with high recording efficiency and a magnetoresistive head with high reproduction output even in narrow tracks are installed together, and recording and reproduction are performed with the same head. Therefore, it is possible to obtain a high-performance composite thin-film magnetic head that can record with a low recording current, has a gap length as small as that of a wire-wound magnetic head, and can provide high output with high recording density.
第１図は本発明にかかる複合型薄膜磁気ヘッドの一実施
例の平面図及び断面図、第２図〜第４図は従来例の各種
磁気ヘッドを示す図面である。
ｌ・・・下部磁性体磁極、２・・・ギャップ層、３．５
、１０・・・絶縁層、４・・・導電コイル、６・・・上
部磁性体磁極、７・・・記録媒体、８・・・磁気抵抗効
果素子
代理人の氏名 弁理士 粟野重孝 はか１名第３図
（Ａ）
（Ｂ）
−一〒−一一FIG. 1 is a plan view and a sectional view of an embodiment of a composite thin film magnetic head according to the present invention, and FIGS. 2 to 4 are drawings showing various conventional magnetic heads. l... Lower magnetic pole, 2... Gap layer, 3.5
, 10... Insulating layer, 4... Conductive coil, 6... Upper magnetic pole, 7... Recording medium, 8... Name of magnetoresistive element agent Patent attorney Shigetaka Awano Haka 1 Figure 3 (A) (B) -1-11
Claims (1)
た巻線型薄膜磁気ヘッドにおいて、バックギャップ部周
辺の前記下部磁性体磁極、前記バックギャップ、前記上
部磁性体磁極からなる斜面上に磁気抵抗効果素子の一部
分が前記下部磁性体磁極及び前記上部磁性体磁極と重な
りをもって形成されていることを特徴とする複合型薄膜
磁気ヘッド。In a wire-wound thin film magnetic head that includes a lower magnetic pole, an upper magnetic pole, and a conductive coil, a magnetic resistance is formed on a slope formed of the lower magnetic pole, the back gap, and the upper magnetic pole around the back gap portion. A composite thin film magnetic head, wherein a portion of an effect element is formed to overlap the lower magnetic pole and the upper magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28173288A JPH02128312A (en) | 1988-11-08 | 1988-11-08 | Composite type thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28173288A JPH02128312A (en) | 1988-11-08 | 1988-11-08 | Composite type thin film magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02128312A true JPH02128312A (en) | 1990-05-16 |
Family
ID=17643212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28173288A Pending JPH02128312A (en) | 1988-11-08 | 1988-11-08 | Composite type thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02128312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04182913A (en) * | 1990-11-16 | 1992-06-30 | Mitsubishi Electric Corp | Magneto-resistance effect type magnetic head |
| US6101067A (en) * | 1992-12-17 | 2000-08-08 | Sony Corporation | Thin film magnetic head with a particularly shaped magnetic pole piece and spaced relative to an MR element |
-
1988
- 1988-11-08 JP JP28173288A patent/JPH02128312A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04182913A (en) * | 1990-11-16 | 1992-06-30 | Mitsubishi Electric Corp | Magneto-resistance effect type magnetic head |
| US6101067A (en) * | 1992-12-17 | 2000-08-08 | Sony Corporation | Thin film magnetic head with a particularly shaped magnetic pole piece and spaced relative to an MR element |
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