JPH0266710A - Thin film magnetic head - Google Patents
Thin film magnetic headInfo
- Publication number
- JPH0266710A JPH0266710A JP21630588A JP21630588A JPH0266710A JP H0266710 A JPH0266710 A JP H0266710A JP 21630588 A JP21630588 A JP 21630588A JP 21630588 A JP21630588 A JP 21630588A JP H0266710 A JPH0266710 A JP H0266710A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magnetic
- magnetic pole
- thin film
- pole film
- 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 abstract description 33
- 239000010408 film Substances 0.000 claims abstract description 62
- 230000004907 flux Effects 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明は垂直磁気記録方式に適した記録再生感度の高
い薄膜磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a thin film magnetic head with high recording and reproducing sensitivity suitable for perpendicular magnetic recording.
（従来の技術）
垂直磁気記録方式は従来の長手磁気記録方式と比べ極め
て記録密度の高い記録再生を可能にすることが知られて
いる。この垂直磁気記録方式に用いられる磁気ヘッドと
しては、ヘッド効率の点から垂直磁気記録媒体の記録磁
性層側に配置される片側アクセスの単磁極ヘッドが良い
とされている。(Prior Art) It is known that the perpendicular magnetic recording method enables recording and reproduction with extremely high recording density compared to the conventional longitudinal magnetic recording method. As a magnetic head used in this perpendicular magnetic recording system, a single-side access single-pole head disposed on the recording magnetic layer side of a perpendicular magnetic recording medium is considered to be suitable from the viewpoint of head efficiency.
さらに近年では、ヘラ１〜の感度、ＳＮ比、データ転送
シー１−の向上を目的に前記単磁極ヘッドを完全に薄膜
化する試みが広く進められている。このようなヘッドと
しては種々のタイプが提案されている。Furthermore, in recent years, attempts have been made to completely reduce the thickness of the single magnetic pole head with the aim of improving the sensitivity, signal-to-noise ratio, and data transfer ratio of the spatula 1. Various types of such heads have been proposed.
第２図はその一例を示すもので、この例では矢印の方向
に走行する垂直磁気記録媒体１の磁性層］０の面に対接
ないしは対向する主磁極膜２の上に、主磁極膜２の媒体
１側の先端から所定の距離を残して、補助磁極膜３が形
成され、この補助磁極膜３の上には絶縁層８に覆われて
薄膜コイル５が形成され、さらに記録・再生時の信号磁
束をヘラ１〜と媒体１の間に還流させるために軟磁性膜
がら成るリターンパス４を前記補助磁極膜３に磁気的に
接続させ、以上の構成をもって信号の記録再生を行うも
のである。FIG. 2 shows an example of this. In this example, the main pole film 2 is placed on the main pole film 2 that is in contact with or opposite to the surface of the magnetic layer]0 of the perpendicular magnetic recording medium 1 running in the direction of the arrow. An auxiliary magnetic pole film 3 is formed leaving a predetermined distance from the tip of the medium 1 side, and a thin film coil 5 is formed on the auxiliary magnetic pole film 3 covered with an insulating layer 8. A return path 4 made of a soft magnetic film is magnetically connected to the auxiliary magnetic pole film 3 in order to circulate the signal magnetic flux between the spatulas 1 and the medium 1, and the above-mentioned configuration is used to record and reproduce signals. be.
ところが、このヘッドでは必ずしも良好なヘッド効率を
得ることが出来ながった。すなわち、記録時には前記主
磁極膜２の先端部を十分に磁化させるために薄膜コイル
５に記録電流を流すと薄膜コイル５から発生した信号磁
束により主磁極膜２と補助磁極膜３の段差部近傍が磁気
的に飽和し易くなり意に反して主磁極膜２の前記先端部
を十分に磁化する事が出来なくなるという問題があった
。However, with this head, it was not always possible to obtain good head efficiency. That is, during recording, when a recording current is passed through the thin film coil 5 in order to sufficiently magnetize the tip of the main pole film 2, the signal magnetic flux generated from the thin film coil 5 causes the magnetic flux near the step between the main pole film 2 and the auxiliary pole film 3 to be There was a problem in that the tip of the main magnetic pole film 2 could not be sufficiently magnetized against one's will because the main magnetic pole film 2 becomes easily saturated magnetically.
一方、再生時には媒体１がらの信号磁束が主磁極膜２か
ら補助磁極膜に至る途中で周囲に洩れ易くその結果、十
分な再生出力が得られないという問題があった。On the other hand, during reproduction, the signal magnetic flux from the medium 1 tends to leak to the surroundings on the way from the main pole film 2 to the auxiliary pole film, resulting in a problem in that a sufficient reproduction output cannot be obtained.
（発明が解決しようとする課題）
従来の垂直磁気記録用薄膜磁気ヘッドは記録再生の効率
と感度が不十分なため将来の高記録密度の信号をＳＮ比
良く記録再生することが難しいという欠点を有していた
。(Problems to be Solved by the Invention) Conventional thin-film magnetic heads for perpendicular magnetic recording have the disadvantage that it is difficult to record and reproduce future high-density signals with a good signal-to-noise ratio due to insufficient recording and reproduction efficiency and sensitivity. had.
この発明の目的は、上記従来技術の欠点をなくし、記録
、再生の効率と感度が高く高密度磁気記録に適した高Ｓ
Ｎ比の薄膜磁気ヘッドを提供することである。The purpose of the present invention is to eliminate the drawbacks of the above-mentioned prior art, and to provide a high S.S.
An object of the present invention is to provide a thin film magnetic head with an N ratio.
（課題を解決するための手段）
この発明は、磁気回路が主磁極膜とこの膜が記録媒体と
対接あるいは対向する先端から前記媒体に対して垂直方
向に所定距離の部分を残して前記主磁極膜の面上に形成
された軟磁性の補助磁極膜と、記録・再生時の信号磁束
をヘッド・媒体間で還流させるために前記補助磁極膜に
磁気的に接続された軟磁性膜のリターンパスとから構成
された薄膜磁気ヘラｌ＜に於いて、前記主磁極膜の前記
補助磁極膜で覆われていない面上に絶縁層を介して薄膜
コイルを形成することにより、前記薄膜コイルのターン
数を少なくしても記録・再生の効率と感度が良好にし、
しかも記録密度の高い信号を良好なＳＮ比をもって記録
再生することを可能にするものである。(Means for Solving the Problems) The present invention provides a magnetic circuit in which a main magnetic pole film and a main magnetic pole film are connected to each other by leaving a predetermined distance from the leading end of the main magnetic pole film in contact with or facing a recording medium in a direction perpendicular to the medium. A soft magnetic auxiliary magnetic pole film formed on the surface of the magnetic pole film, and a soft magnetic film return magnetically connected to the auxiliary magnetic pole film to circulate signal magnetic flux between the head and the medium during recording and reproduction. In a thin film magnetic spatula consisting of a path, a thin film coil is formed on the surface of the main pole film that is not covered with the auxiliary pole film via an insulating layer, so that the turn of the thin film coil is Even if the number is reduced, recording/playback efficiency and sensitivity are good,
Furthermore, it is possible to record and reproduce signals with a high recording density with a good signal-to-noise ratio.
（作 用）
この発明によれば、薄膜コイルと主磁極膜が近接して配
置されるため前記コイルと前記主磁極膜の磁気的結合度
を高くできその結果高い記録再生感度を得ることができ
る。すなわち、記録時には薄膜コイルに記録電流を流す
ことにより発生する信号磁界が前記主磁極膜の媒体に対
接または対向する先端部に直接印加されるため、少ない
コイルターン数で且つ少ない起磁力で前記先端部を容易
に磁化することができ、その結果高い記録効率を得るこ
とができる。また、この構成では従来技術のように主磁
極膜と補助磁極膜の段差部近傍を不用意に磁気飽和させ
ることがない。一方、再生時には薄膜コイルが主磁極膜
の媒体側の先端部に近傍しているために媒体からの信号
磁束をほとんど洩らすことなく前記薄膜コイルに鎖交さ
せることかできたため従来技術と比較して高い再生感度
が得られる。(Function) According to the present invention, since the thin film coil and the main magnetic pole film are arranged close to each other, the degree of magnetic coupling between the coil and the main magnetic pole film can be increased, and as a result, high recording and reproducing sensitivity can be obtained. . That is, during recording, the signal magnetic field generated by passing a recording current through the thin film coil is directly applied to the tip of the main pole film that faces or faces the medium. The tip can be easily magnetized, resulting in high recording efficiency. Further, with this configuration, unlike the prior art, the vicinity of the stepped portion between the main pole film and the auxiliary pole film is not inadvertently magnetically saturated. On the other hand, during reproduction, since the thin film coil is close to the tip of the main magnetic pole film on the medium side, the signal magnetic flux from the medium can be linked to the thin film coil without leaking much of it, compared to the conventional technology. High playback sensitivity can be obtained.
（実施例） 以下、この発明の実施例を図面を用いて説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図は、本発明による垂直磁気記録用薄膜磁気ヘッド
の一実施例を示す断面図であって、基板７上に主磁極膜
２が形成され、主磁極膜２の」二には主磁極膜２が垂直
磁気記録媒体１に対接ないしは対向する先端から媒体１
の磁性層１０面に対し垂直方向に所定の距離を残して軟
磁性の補助磁極膜３が形成され、補助磁極膜３には信号
磁束を媒体１に還流させる軟磁性膜から成るリターンパ
ス４が磁気的に接続されており、前記主磁極膜２の前記
補助磁極膜３で覆われていない面上に絶縁膜６を介して
薄膜コイル５を形成したものである。前記薄膜コイルは
２タ一ン以上でもよい。この実施例では、主磁極膜２の
補助磁極膜３によって覆われていない面上に絶縁層５を
介して薄膜コイル５を近接配置させられその結果、主磁
極膜２の前記先端部と薄膜コイルの磁気的結合度を高く
することができる。従って、記録時には薄膜コイル５へ
流す記録電流が比較的小さくても主磁極膜２の媒体１側
の先端部を直接的に十分に磁化することができるため従
来技術と比べ薄膜コイルのターン数が少なくてもあるい
は起磁力が小さくても高い記録感度が得られることを意
味する。さらにヘッドの作製工程が容易になり、製造歩
留まりも向上する。−・方、再生時には媒体１から吸い
上げた信号磁束をほとんど洩らすことなく薄膜コイル５
に鎖交させることかできるため高い再生効率が得られる
。なお、薄膜コイル５のターン数が少ない場合はステッ
プアップトランスを用いて再生出力を増加させてもよい
。FIG. 1 is a sectional view showing an embodiment of a thin film magnetic head for perpendicular magnetic recording according to the present invention, in which a main magnetic pole film 2 is formed on a substrate 7, and a main magnetic pole film 2 is formed on the second side of the main magnetic pole film 2. From the tip where the film 2 faces or faces the perpendicular magnetic recording medium 1, the medium 1
A soft magnetic auxiliary magnetic pole film 3 is formed leaving a predetermined distance in the perpendicular direction to the magnetic layer 10 surface of the magnetic layer 10, and a return path 4 made of a soft magnetic film that circulates the signal magnetic flux back to the medium 1 is formed in the auxiliary magnetic pole film 3. A thin film coil 5 is formed on the surface of the main magnetic pole film 2 that is not covered with the auxiliary magnetic pole film 3 with an insulating film 6 interposed therebetween. The thin film coil may have two or more turns. In this embodiment, the thin film coil 5 is arranged close to the surface of the main pole film 2 that is not covered by the auxiliary pole film 3 via the insulating layer 5, and as a result, the tip of the main pole film 2 and the thin film coil The degree of magnetic coupling can be increased. Therefore, during recording, even if the recording current flowing through the thin film coil 5 is relatively small, the tip of the main pole film 2 on the medium 1 side can be sufficiently magnetized directly. This means that high recording sensitivity can be obtained even if the magnetomotive force is small. Furthermore, the manufacturing process of the head becomes easier and the manufacturing yield also improves. - On the other hand, during playback, the signal magnetic flux sucked up from the medium 1 is hardly leaked and the thin film coil 5
High regeneration efficiency can be obtained because the molecules can be linked to each other. Note that if the number of turns of the thin film coil 5 is small, a step-up transformer may be used to increase the reproduction output.
以Ｉ−説明したように、この発明によれば薄膜コイルの
ターン数が少なくても記録・再生の効率と感度を容易に
高くすることができ、その結果、従来以上に高記録密度
の薄膜磁気ヘッド使を実現することができる。また、薄
膜コイルのターン数が少なくて済むため製造工程が容易
になると共に製造歩留まりも向上する。As explained below, according to the present invention, recording/reproducing efficiency and sensitivity can be easily increased even if the number of turns in the thin film coil is small, and as a result, thin film magnetism with higher recording density than before can be achieved. Head usage can be realized. Further, since the number of turns of the thin film coil is small, the manufacturing process becomes easier and the manufacturing yield is improved.
第１図は本発明の一実施例を示す断面図、第２図は従来
例の断面図を示す。
１・・垂直磁気記録媒体
３・・・補助磁極膜
５ コイル
７・・・基板
９ 保護板
１１・・高透磁率層
主磁極膜
リターンパス
絶縁層
絶縁層
・記録磁性層
代理人 弁理士 則 近 憲 佑
同 松山光之FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. 1... Perpendicular magnetic recording medium 3... Auxiliary magnetic pole film 5 Coil 7... Substrate 9 Protective plate 11... High magnetic permeability layer Main magnetic pole film Return path Insulating layer Insulating layer/recording magnetic layer Agent Patent attorney Nori Chika Ken Yudo Mitsuyuki Matsuyama
Claims (1)
記主磁極膜の先端から前記記録媒体の記録磁性層面に対
し垂直方向に所定距離の部分を残して前記主磁極膜の上
に形成した軟磁性の補助磁極膜と、記録・再生時の信号
磁束をヘッドと前記媒体の間に還流させるために前記補
助磁極膜に磁気的に接続された軟磁性膜から成るリター
ンパスを有する薄膜磁気ヘッドに於いて、前記主磁極膜
の前記補助磁極膜で覆われていない面上に絶縁層を介し
て薄膜コイルを形成してあることを特徴とする薄膜磁気
ヘッド。(1) A main magnetic pole film and a portion formed on the main magnetic pole film leaving a predetermined distance from the tip of the main magnetic pole film that faces or faces the recording medium in the direction perpendicular to the recording magnetic layer surface of the recording medium. A thin film magnetic thin film having a return path consisting of a soft magnetic auxiliary magnetic pole film and a soft magnetic film magnetically connected to the auxiliary magnetic pole film for circulating signal magnetic flux during recording and reproduction between the head and the medium. 1. A thin film magnetic head, characterized in that a thin film coil is formed on a surface of the main pole film not covered with the auxiliary pole film with an insulating layer interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21630588A JPH0266710A (en) | 1988-09-01 | 1988-09-01 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21630588A JPH0266710A (en) | 1988-09-01 | 1988-09-01 | Thin film magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266710A true JPH0266710A (en) | 1990-03-06 |
Family
ID=16686441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21630588A Pending JPH0266710A (en) | 1988-09-01 | 1988-09-01 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266710A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006331612A (en) * | 2005-05-23 | 2006-12-07 | Headway Technol Inc | Thin film magnetic head and manufacturing method thereof |
| US7433152B2 (en) | 2004-11-05 | 2008-10-07 | Tdk Corporation | Perpendicular magnetic recording head, method of manufacturing the same, and magnetic recording apparatus |
| US7667928B2 (en) | 2005-05-13 | 2010-02-23 | Tdk Corporation | Thin-film magnetic head having a width-thickness configured shield layer positioned by spacer pieces for use in a head gimbal assembly of a hard disk system |
| US7808743B2 (en) | 2007-03-05 | 2010-10-05 | Tdk Corporation | Perpendicular magnetic write head having a structure that suppresses unintended erasure of information on a write medium at a non-writing time |
| US7983009B2 (en) | 2006-05-23 | 2011-07-19 | Tdk Corporation | Magnetic recording/reproducing system, and thin-film magnetic head having shield layers of specified widths |
| US8064163B2 (en) | 2007-01-31 | 2011-11-22 | Tdk Corporation | Perpendicular magnetic write head having a thin film coil generating a magnetic flux and method of manufacturing perpendicular magnetic write head, and magnetic write device |
| US8102622B2 (en) | 2009-01-05 | 2012-01-24 | Tdk Corporation | Perpendicular magnetic write head, method of manufacturing the same and method of forming magnetic layer pattern |
| US8400732B2 (en) | 2006-11-10 | 2013-03-19 | Sae Magnetics (H.K.) Ltd. | Perpendicular magnetic write head, having side shields coupled to a leading shield and apart from a trailing shield |
-
1988
- 1988-09-01 JP JP21630588A patent/JPH0266710A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7433152B2 (en) | 2004-11-05 | 2008-10-07 | Tdk Corporation | Perpendicular magnetic recording head, method of manufacturing the same, and magnetic recording apparatus |
| US7457080B2 (en) | 2004-11-05 | 2008-11-25 | Tdk Corporation | Perpendicular magnetic recording head, method of manufacturing the same, and magnetic recording apparatus |
| US7667928B2 (en) | 2005-05-13 | 2010-02-23 | Tdk Corporation | Thin-film magnetic head having a width-thickness configured shield layer positioned by spacer pieces for use in a head gimbal assembly of a hard disk system |
| JP2006331612A (en) * | 2005-05-23 | 2006-12-07 | Headway Technol Inc | Thin film magnetic head and manufacturing method thereof |
| US8043515B2 (en) | 2005-05-23 | 2011-10-25 | Headway Technologies, Inc. | Thin film magnetic head and manufacturing method thereof |
| US7983009B2 (en) | 2006-05-23 | 2011-07-19 | Tdk Corporation | Magnetic recording/reproducing system, and thin-film magnetic head having shield layers of specified widths |
| US8400732B2 (en) | 2006-11-10 | 2013-03-19 | Sae Magnetics (H.K.) Ltd. | Perpendicular magnetic write head, having side shields coupled to a leading shield and apart from a trailing shield |
| US8064163B2 (en) | 2007-01-31 | 2011-11-22 | Tdk Corporation | Perpendicular magnetic write head having a thin film coil generating a magnetic flux and method of manufacturing perpendicular magnetic write head, and magnetic write device |
| US7808743B2 (en) | 2007-03-05 | 2010-10-05 | Tdk Corporation | Perpendicular magnetic write head having a structure that suppresses unintended erasure of information on a write medium at a non-writing time |
| US8102622B2 (en) | 2009-01-05 | 2012-01-24 | Tdk Corporation | Perpendicular magnetic write head, method of manufacturing the same and method of forming magnetic layer pattern |
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