JPS62209707A - Vertical magnetic head - Google Patents
Vertical magnetic headInfo
- Publication number
- JPS62209707A JPS62209707A JP5283586A JP5283586A JPS62209707A JP S62209707 A JPS62209707 A JP S62209707A JP 5283586 A JP5283586 A JP 5283586A JP 5283586 A JP5283586 A JP 5283586A JP S62209707 A JPS62209707 A JP S62209707A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic pole
- pole
- main
- layer
- 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
- 230000004907 flux Effects 0.000 claims abstract description 19
- 230000035699 permeability Effects 0.000 abstract description 6
- 230000000295 complement effect Effects 0.000 abstract 2
- 230000005415 magnetization Effects 0.000 description 8
- 239000010408 film Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 229920006267 polyester film Polymers 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
- G11B5/1278—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】 〔産業上の利用分野〕 この発明は、記録媒体の磁化層の表面に対し。[Detailed description of the invention] [Industrial application field] This invention applies to the surface of a magnetic layer of a recording medium.
垂直方向に磁束を入射させて、情報を記録し、その記録
より再生を行う垂直磁気ヘッドに関するものである。The present invention relates to a perpendicular magnetic head that records information by vertically injecting magnetic flux and performs reproduction from the recording.
従来、この種の垂直磁気ヘッドとして１例えば特開昭５
２−１３４７０６号公報に示すような、主磁極と補助磁
極とが、記録媒体を挟んで対向するものがあった。Conventionally, as this type of perpendicular magnetic head, 1, for example,
There is a magnetic recording medium in which a main magnetic pole and an auxiliary magnetic pole face each other with a recording medium in between, as shown in Japanese Patent No. 2-134706.
しかし、このような垂直磁気ヘッドは、記録および再生
に寄与する磁束が、空間を拡散する開磁路となっており
、効率が悪いものであった。この効率を改善するために
、磁束の流れが効率のよい閉磁路になるような垂直磁気
ヘッドが提案されている。However, in such a perpendicular magnetic head, the magnetic flux that contributes to recording and reproduction forms an open magnetic path that spreads through space, resulting in poor efficiency. In order to improve this efficiency, a perpendicular magnetic head has been proposed in which the flow of magnetic flux forms an efficient closed magnetic path.
第４図は特開昭５２−８２３１８号公報に示される磁束
の流れが閉磁路となる垂直磁気ヘッドを示す斜視図であ
る。図において、（１）は記録媒体、（２）は磁化層、
（３）はパーマロイ等からなる高透磁率磁性層。FIG. 4 is a perspective view showing a perpendicular magnetic head in which the flow of magnetic flux forms a closed magnetic path, as disclosed in Japanese Patent Application Laid-Open No. 52-82318. In the figure, (1) is a recording medium, (2) is a magnetic layer,
(3) is a high permeability magnetic layer made of permalloy or the like.
（４）はポリエステルフィルムなどからなるベース材で
、これら三層（２＋、 （３１，＋４１は積層一体化さ
れ、記録媒体（１）を構成している。（５）は磁性薄膜
よりなる主磁極で、記録媒体＋１１上に、垂直忙配置さ
れているう（６）はフェライト等の高透磁率材からなる
Ｌ字状の補助磁極で、主磁極（５）の磁束の磁路を与え
るうその水平片（財）に、上記主磁極（５）が取付けら
れ、その垂直片（６０の端面（６ａ）、即ち、記録媒体
（１）の磁化層（２）のトラック部（９）との対向面は
、上記主磁極（５）の端面（５ａ）よりも充分広い面積
を有し、前記主磁極（５）の端面（５ａ）と同一平面上
に配置されているうまた（５ｂ）は主磁極（５）の補助
磁極（６）に対向する面であるう（′７）はコイルで補
助磁極（６）の水平片（（イ）に巻回されているう破線
（８）及び（８力は磁束の流れを表わす。(4) is a base material made of polyester film, etc., and these three layers (2+, (31, +41) are laminated and integrated to form the recording medium (1). (5) is a main magnetic pole made of a magnetic thin film. The auxiliary magnetic pole (6) vertically arranged on the recording medium +11 is an L-shaped auxiliary magnetic pole made of a high magnetic permeability material such as ferrite, and is an auxiliary magnetic pole that provides a magnetic path for the magnetic flux of the main magnetic pole (5). The main magnetic pole (5) is attached to the horizontal piece (material), and the end face (6a) of the vertical piece (60) is opposite to the track portion (9) of the magnetic layer (2) of the recording medium (1). The surface has a sufficiently larger area than the end surface (5a) of the main magnetic pole (5), and the surface (5b) disposed on the same plane as the end surface (5a) of the main magnetic pole (5) is the main magnetic pole (5). The surface of the magnetic pole (5) facing the auxiliary magnetic pole (6) ('7) is a coil that is wound around the horizontal piece ((A) of the auxiliary magnetic pole (6). Force represents the flow of magnetic flux.
なお、トラック部（９）は記録媒体１１）の磁化層（２
）に主磁極（５）により記録された信号記録部である。Note that the track portion (9) corresponds to the magnetic layer (2) of the recording medium 11).
) is a signal recording section recorded by the main magnetic pole (5).
次に動作について説明する。Next, the operation will be explained.
第５図は第４図の■−ｖ線に沿った断面構成図であり、
補助磁極（６）がコイル（７）によって励磁されると、
磁束（８）は高透磁率磁性層（３）を通る閉磁路を構成
するので、効率よく主磁極端面（５ａ）を飽和磁化レベ
ルまで駆動し９強い磁界を発生させて、記録媒体１１）
の磁化層（２）のトラック部（９）に、記録媒体（１）
の厚さ方向に磁束を入射させ、情報を記録するっ再生時
も、上記と同様の閉磁路を構成することによって、ｌａ
磁化層２）の磁化の変化をコイル（７）に効率よく誘導
させる。FIG. 5 is a cross-sectional configuration diagram taken along the line ■-v in FIG. 4,
When the auxiliary magnetic pole (6) is excited by the coil (7),
Since the magnetic flux (8) constitutes a closed magnetic path passing through the high permeability magnetic layer (3), it efficiently drives the main pole end face (5a) to the saturation magnetization level and generates a strong magnetic field 9, which drives the recording medium 11).
The recording medium (1) is placed on the track portion (9) of the magnetic layer (2) of
When magnetic flux is incident in the thickness direction of the la...
The change in magnetization of the magnetized layer 2) is efficiently induced in the coil (7).
従来の垂直磁気ヘッドは以上のように構成されているの
でオーバーライドなどのように、さらに強い磁界を磁化
層（２）に加えるために、コイル（７）を強く励磁する
と、主磁極（５）は磁気飽和を起こし。Since the conventional perpendicular magnetic head is constructed as described above, when the coil (7) is strongly excited in order to apply an even stronger magnetic field to the magnetic layer (2) for override, etc., the main magnetic pole (5) Causes magnetic saturation.
主磁極の補助磁極に対向する面（５ｂ）を通る磁路（８
０が構成され、磁化層（２）に、厚さ方向以外の水平方
向成分の磁化が残り、信号を再生するときに得られる波
形に歪が生じるという問題点があった。A magnetic path (8
0, magnetization in the horizontal direction other than the thickness direction remains in the magnetized layer (2), causing distortion in the waveform obtained when reproducing a signal.
この発明は上記のような問題点を解消するためになされ
たもので、閉磁路の効率のよさを阻害することなく、記
録時に主磁極が飽和を起こしても磁化層に厚さ方向のみ
の磁化を残し、再生波形を歪ませることのない信頼性の
高い垂直磁気ヘッドを得ることを目的とする。This invention was made to solve the above-mentioned problems.It does not impede the efficiency of the closed magnetic circuit, and even if the main magnetic pole is saturated during recording, the magnetization layer can be magnetized only in the thickness direction. The objective is to obtain a highly reliable perpendicular magnetic head that does not distort the reproduced waveform.
この発明に係る垂直磁気ヘッドは、主磁極の補助磁極に
対向する側に、非磁性で、導電性の膜を設けたものであ
る。The perpendicular magnetic head according to the present invention has a non-magnetic, electrically conductive film provided on the side of the main pole that faces the auxiliary pole.
この発明における主磁極は、磁気飽和を起こしても、主
磁極の補助磁極に対向する側を通ろうとする磁束が、導
′ｎｔ性の膜によるうず電流積によって減少し、磁化層
に水平方向成分の磁化が生じるのを防ぐつ
〔実権例〕
以下、この発明の一実施例を図について説明する。In the main magnetic pole of this invention, even if magnetic saturation occurs, the magnetic flux that attempts to pass through the side of the main magnetic pole opposite to the auxiliary magnetic pole is reduced by the eddy current product due to the conductive film, and a horizontal component is generated in the magnetic layer. [Actual Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は、この発明の一実施例による垂直磁気ヘッドを
示す斜視図、第２図は第１図のｎ−ｎ線断面図である。FIG. 1 is a perspective view showing a perpendicular magnetic head according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line nn in FIG. 1.
図において、主磁極（５）は、パーマロイあるいは、ア
モルファス磁性合金からなる高飽和磁束密度、高透磁率
の金属性薄膜であり、その下端面（５ａ）は記録媒体１
１）の磁化層（２）に対向して記録および再生作用を行
う。また、主磁極の補助磁極に対向する面（５ｂ）に、
非磁性で、導電性の膜００）が設けられている。In the figure, the main magnetic pole (5) is a metallic thin film with high saturation magnetic flux density and high magnetic permeability made of permalloy or an amorphous magnetic alloy, and its lower end surface (5a) is attached to the recording medium 1.
Recording and reproducing operations are performed facing the magnetized layer (2) of 1). In addition, on the surface (5b) of the main magnetic pole facing the auxiliary magnetic pole,
A non-magnetic, electrically conductive film 00) is provided.
一方、この主磁極（５）の上端面は、フェライト等の高
透磁率材からなる逆り字状の補助磁極（６）の水平片（
（至）に接合されている。そして、上記補助磁極（６）
の垂直片（６Ｉ）の下端面（６ａ）、即ちトラック部（
９）との対向面は、主磁極（５）の下端面（５ａ）より
も広い面積を有する。On the other hand, the upper end surface of this main magnetic pole (5) is connected to the horizontal piece (
(to) is joined. And the above auxiliary magnetic pole (6)
The lower end surface (6a) of the vertical piece (6I), that is, the track portion (
9) has a larger area than the lower end surface (5a) of the main pole (5).
これらの図から明らかなように、記録および再生時の磁
路（８）は、高透磁率磁性層（３）を通る閉磁路を形成
するので、前記第４図及び第５図に示す従来の磁気ヘッ
ドと同様に効率がよいっまた。主磁極の補助磁極に対向
する面（５ｂ）に非磁性で、導電性の膜ｆｉｌｌが設け
られているので、オーバーライドなどのように、さらに
強い磁界を磁化層（２）に加えようとして、コイル（７
）を強く励磁した時に、主磁極（５）が磁気飽和を起こ
し、補助磁極に対向する面（５ｂ）を通ろうとする磁路
（８１）が発生し、磁化層（２）に水平方向成分の磁化
を残そうとする。しかし、導電性の脱進によって、との
磁路（８１）を通る磁束は。As is clear from these figures, the magnetic path (8) during recording and reproduction forms a closed magnetic path passing through the high permeability magnetic layer (3), so the conventional magnetic path shown in FIGS. It is also as efficient as a magnetic head. Since a non-magnetic and conductive film fill is provided on the surface (5b) of the main magnetic pole facing the auxiliary magnetic pole, when trying to apply a stronger magnetic field to the magnetic layer (2) such as override, the coil (7
) is strongly excited, the main magnetic pole (5) undergoes magnetic saturation, and a magnetic path (81) is generated that tries to pass through the surface (5b) facing the auxiliary magnetic pole, causing a horizontal component in the magnetic layer (2). Try to leave magnetization behind. However, due to conductive escape, the magnetic flux passing through the magnetic path (81) with .
補助磁極に対向する面に平行にうず電流０１１を生じ。An eddy current 011 is generated parallel to the surface facing the auxiliary magnetic pole.
この電流αＤによって、磁路（８］）を通る磁束を打ち
消す向きの磁路（イ）が形成され、いわゆるうず電流積
によって磁路（８］）を通る磁束は大幅に減少し、記録
媒体１１）に加わる磁束は、厚さ方向のみとなる磁路（
８）を通る。このようにして、厚さ方向のみに媒体（１
）が磁化されるので、再生信号に水平方向成分磁化によ
る波形歪みが生じないつまた。コイル（７）を励磁する
ための電流の選択の幅も広くなる。This current αD forms a magnetic path (A) in a direction that cancels out the magnetic flux passing through the magnetic path (8]), and the magnetic flux passing through the magnetic path (8]) is significantly reduced due to the so-called eddy current product. ) The magnetic flux applied to the magnetic path (
8). In this way, the medium (1
) is magnetized, so there is no waveform distortion caused by horizontal component magnetization in the reproduced signal. The range of selection of current for exciting the coil (7) is also widened.
第３図は、この発明の他の実施例による垂直磁気ヘッド
を示す斜視図であり、補助磁極がコ字状のものを示すっ
第３図に示す磁気ヘッドは、補助磁極（６）の水平片（
ホ）に主磁極（５）を設け、補助磁極の下端面（６ａ）
の面積を犬きくして、記録および再生効率を向上させて
いる。このような磁気ヘッドにおいても主磁極の補助磁
極に対向する面、この場合は主磁極（５）の両側面にそ
れぞれ非磁性で、導電性の脱進を設けることで、主磁極
（５）が磁気飽和を起こした時でも媒体（１）には厚さ
方向の磁化のみを記録することができる。FIG. 3 is a perspective view showing a vertical magnetic head according to another embodiment of the present invention, in which the auxiliary magnetic pole is U-shaped. Piece (
A main magnetic pole (5) is provided in e), and the lower end surface (6a) of the auxiliary magnetic pole is
The recording and playback efficiency is improved by increasing the surface area. Even in such a magnetic head, the main magnetic pole (5) can be fixed by providing a non-magnetic and conductive escapement on the surface of the main magnetic pole that faces the auxiliary magnetic pole, in this case, on both sides of the main magnetic pole (5). Even when magnetic saturation occurs, only magnetization in the thickness direction can be recorded on the medium (1).
以上のように、この発明によれば、主磁極の補助磁極に
対向する側に、非磁性で、導電性の膜を設けたので、主
磁極が磁気飽和を起こした時でも記録媒体に、水平成分
の磁化を記録するのを抑えることができ、また、波形歪
のない再生信号が得７、（，７）
られる効果がある。As described above, according to the present invention, since a non-magnetic and conductive film is provided on the side of the main magnetic pole opposite to the auxiliary magnetic pole, even when the main magnetic pole is magnetically saturated, the recording medium can be horizontally This has the effect of suppressing the recording of component magnetization and obtaining a reproduced signal without waveform distortion7,(,7).
第１図はこの発明の一実施例による垂直磁気ヘッドを示
す斜視図、第２図は第１図のｎ−ｕ線断面図、第３図は
この発明の他の実施例による垂直磁気ヘッドを示す斜視
図、第４図は従来の垂直磁気ヘッドを示す斜視図、及び
第５図は第４図の■−Ｖ線断面図である。
（１）・・・記録媒体、（２）・・・磁化層、（５）・
・・主磁極、（６）・・・補助＠甑、 （７１・・・コ
イル、（８）・・・磁路、（９）・・・トラック部、ａ
Ｏ）・・・非磁性で、導電性の膜っなお１図中、同一符
号は同−又は相当部分を示す。FIG. 1 is a perspective view showing a perpendicular magnetic head according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line nu in FIG. 1, and FIG. 3 is a perpendicular magnetic head according to another embodiment of the invention. FIG. 4 is a perspective view showing a conventional perpendicular magnetic head, and FIG. 5 is a sectional view taken along the line -V in FIG. 4. (1)...recording medium, (2)...magnetic layer, (5)...
...Main magnetic pole, (6)...Auxiliary@Koshiki, (71...Coil, (8)...Magnetic path, (9)...Track part, a
O)...A non-magnetic, conductive film.In the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
有し、記録媒体の磁化層のトラック部に、上記主磁極よ
り上記記録媒体の厚さ方向に磁束を入射させて情報を記
録し、その記録より再生を行うものにおいて、上記主磁
極の上記補助磁極に対向する側に非磁性で、導電性の膜
を設けたことを特徴とする垂直磁気ヘッド。It has a main magnetic pole and an auxiliary magnetic pole that provides a magnetic path for the magnetic flux of the main magnetic pole, and information is recorded by injecting magnetic flux from the main magnetic pole in the thickness direction of the recording medium into the track portion of the magnetic layer of the recording medium. A perpendicular magnetic head for performing reproduction from recording, characterized in that a non-magnetic, electrically conductive film is provided on the side of the main magnetic pole that faces the auxiliary magnetic pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5283586A JPS62209707A (en) | 1986-03-11 | 1986-03-11 | Vertical magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5283586A JPS62209707A (en) | 1986-03-11 | 1986-03-11 | Vertical magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62209707A true JPS62209707A (en) | 1987-09-14 |
Family
ID=12925901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5283586A Pending JPS62209707A (en) | 1986-03-11 | 1986-03-11 | Vertical magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62209707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6809901B2 (en) * | 2002-01-08 | 2004-10-26 | Seagate Technology Llc | Low moment material for magnetic recording head write pole |
-
1986
- 1986-03-11 JP JP5283586A patent/JPS62209707A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6809901B2 (en) * | 2002-01-08 | 2004-10-26 | Seagate Technology Llc | Low moment material for magnetic recording head write pole |
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