JPS5979416A - Magnetic recorder - Google Patents
Magnetic recorderInfo
- Publication number
- JPS5979416A JPS5979416A JP18960482A JP18960482A JPS5979416A JP S5979416 A JPS5979416 A JP S5979416A JP 18960482 A JP18960482 A JP 18960482A JP 18960482 A JP18960482 A JP 18960482A JP S5979416 A JPS5979416 A JP S5979416A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- recording
- magnetization
- head
- magnetic pole
- 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.)
- Granted
Links
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】
垂直磁化記録を行なう磁気記録装置において、その磁気
ヘッドの主磁極先端形状が中心部と周辺部の厚みが異な
り、しかも媒体流出側の辺が非直線である磁気記録装置
に関する。Detailed Description of the Invention: A magnetic recording device that performs perpendicular magnetization recording, in which the shape of the main pole tip of the magnetic head has different thicknesses at the center and periphery, and in addition, the side on the medium outflow side is non-straight. Regarding.
高密度磁気記録方式はVTR等の画像記録装置、フロッ
ピーディスクやウィンチェスタ−等の情報記録装置等の
小型化、高容枳化の為に不口」欠となっている。しかし
なから磁気記録方式においては従来の水平磁化記録方式
はその記録密度において既に限界に達しつつある。それ
に対する新しい高密度磁気記録方式として垂直磁化記録
方式が注目されてきている。この方式はコバルトクロミ
ウム等の合金薄膜を用いるものである。これらの合金を
ある一定の条件でPETテープやアルミニウムディスク
上にスパッタあるいは蒸着を行なうことにより磁化方向
を記録媒体面に対して垂直とすることができる。このよ
うな性質はバリウムフェライトの微粒子をバインダーを
用いて塗布することによっても得られる。又従来の酸化
鉄の微粒子をある処理条件のもとで塗布することにより
水平磁化成分と共に垂直磁化成分を持つことができるこ
のような垂直配向記録媒体は記録密度が増大するに従い
減磁作用が減少するために水平磁化方式にくらべ大幅な
記録密度の向上が可能となる。High-density magnetic recording systems are becoming increasingly popular as image recording devices such as VTRs and information recording devices such as floppy disks and Winchester are made smaller and more compact. However, in the magnetic recording system, the conventional horizontal magnetization recording system is already reaching its limit in recording density. Perpendicular magnetization recording is attracting attention as a new high-density magnetic recording method. This method uses a thin film of an alloy such as cobalt chromium. By sputtering or vapor depositing these alloys on a PET tape or aluminum disk under certain conditions, the direction of magnetization can be made perpendicular to the surface of the recording medium. Such properties can also be obtained by coating barium ferrite fine particles with a binder. Furthermore, by coating conventional iron oxide fine particles under certain processing conditions, such vertically oriented recording media can have a vertical magnetization component as well as a horizontal magnetization component. As the recording density increases, the demagnetization effect decreases. Therefore, it is possible to significantly improve the recording density compared to the horizontal magnetization method.
このような垂直記録のための記録再生用磁気へラドは従
来の水平磁化方式に用いられたいわゆるリング型ヘッド
ではなく例えば−公開特許公報(昭52−1’3470
6)等に記さ、れているような単磁極ヘッドが用いられ
る。The recording/reproducing magnetic head for such perpendicular recording is not the so-called ring-type head used in the conventional horizontal magnetization method, but is disclosed in, for example, Japanese Patent Application Publication No. 52-1'3470.
A single magnetic pole head such as that described in 6) is used.
高密度配録を行なう為には垂直磁化方式を用いると、従
来の水平磁化方式の記録波長が2〜6ミクロンであるの
に対しo、 1ミクロン以下になると期待されている。If a perpendicular magnetization method is used to perform high-density recording, it is expected that the recording wavelength of the conventional horizontal magnetization method, which is 2 to 6 microns, will be reduced to less than 1 micron.
更に効率よく高密度記録を行なうには記録tlv−,l
開−。面効率よく利用することを考えねばならない。現
在フロッピーディスクハ記録再生ヘッド本体の両側に記
録再生ヘッドの約半分のヘッド幅のトリミング用のヘッ
ドを備えてトラック位tuがずれても隣接トラックの信
号を再生しないようになっている。即ち必要なトラック
の両f)ill K空隙が存在する。ウインチェスター
ノ場合にはトリミング用のヘッドは持たないがトラック
ピッ′チはヘッド幅の約2倍でやはり記録トラックの両
側に記録再生に寄与しない部分が残る。VTR用テープ
の場合もヘッド幅の約半分のガートバンドと称する空隙
部が存し、テープ媒体面の約三分の−は記粋に使われな
い。In order to perform high-density recording more efficiently, recording tlv-,l
Open. We must think about how to use it efficiently. Currently, floppy disks are equipped with trimming heads on both sides of the recording/reproducing head body, each having a head width approximately half that of the recording/reproducing head, so that signals of adjacent tracks are not reproduced even if the track position tu shifts. That is, both f)ill K gaps of the required track are present. In the case of Winchester, there is no head for trimming, but the track pitch is about twice the width of the head, and there still remain portions on both sides of the recording track that do not contribute to recording and reproduction. In the case of a VTR tape, there is also a gap called a guard band that is approximately half the width of the head, and approximately one-third of the tape medium surface is not used for writing purposes.
VTR用テープの場合にはこれを有効に利用する方法と
して複数のヘッドを用い、隣接するトラックを担当する
ヘッドのヘッドギャップの角度を傾けて記録トラックを
密接させた方式がとられている。この方式は傾斜アジマ
ス記録と呼ばれており、記録波長が短くなるほど、トラ
ック幅が広くなる程、アジマス角を大きくするほど隣接
トラックの影響が小さくなる。しがしながらアジマス角
を大きくするとヘッドとテープの間の相対速度が小さく
なり再生出力が減少する。又アジマス角を大きくすると
わずがなトラックずれでも再生信号が2個のヘッドの間
で連続しなくなる。このような理由の為にアジマス角は
あまり大きくとれず、低周波信号のクロストークは防止
できない。特にこのアジマス記録は複数の磁気ヘッドが
必要で、しかもそれらのヘッド間の調整が困難である。In the case of VTR tapes, a method of effectively utilizing this is to use a plurality of heads and to bring the recording tracks closer together by tilting the angle of the head gap between the heads responsible for adjacent tracks. This method is called inclined azimuth recording, and the influence of adjacent tracks becomes smaller as the recording wavelength becomes shorter, the track width becomes wider, and the azimuth angle becomes larger. However, if the azimuth angle is increased, the relative speed between the head and the tape decreases, and the reproduction output decreases. Furthermore, if the azimuth angle is increased, even a slight track deviation will cause the reproduced signal to become discontinuous between the two heads. For these reasons, the azimuth angle cannot be set very large, and crosstalk of low frequency signals cannot be prevented. In particular, this azimuth recording requires a plurality of magnetic heads, and furthermore, adjustment between these heads is difficult.
このように記録媒体面を全面有効に利用する方式はディ
スクの場合は困難視されており、テープの場合にはアジ
マス記録方式で一応実現されてばいるが数々のデメリッ
トを有している。In the case of disks, this method of effectively utilizing the entire surface of the recording medium is considered difficult, and in the case of tapes, it has been achieved by the azimuth recording method, but it has a number of disadvantages.
本発明はこれらの欠点を排除し、記録波長を短かくする
と共に記録媒体面に無駄な部分を作らず有効に利用して
高密度磁気記録を達成し、超小型高密度磁気記録装置を
完成したものである。The present invention eliminates these drawbacks, shortens the recording wavelength, and effectively utilizes the recording medium surface without creating wasted areas to achieve high-density magnetic recording, thereby completing an ultra-compact high-density magnetic recording device. It is something.
本発明の目的は磁気記録装置の磁気記録媒体面のガート
バンド等の空隙部をなくして高密度磁気記録装置を提供
することにある。An object of the present invention is to provide a high-density magnetic recording device by eliminating gaps such as guard bands on the surface of a magnetic recording medium of the magnetic recording device.
本発明の他の目的は必要最低限のヘッド数でアジマス記
録を行ない低コストで小型高密度磁気記録装置を提供す
ることにある。Another object of the present invention is to provide a compact, high-density magnetic recording device at low cost that performs azimuth recording using the minimum number of heads required.
本発明の基本は垂直磁化記録の可能な磁気記録媒体、即
ちコバルトクロミウム合金薄膜、バリウムフエライ)9
粒子塗付膜2等方配向性酸化鉄微粒子塗何1炭等を用い
、更に磁気ヘッドとして単磁極ヘッドを用いる。特にポ
イントとなる点は単磁極ヘッドの媒体に対向する面、即
ち先端断面の形状がM11常の長方形ではないことにあ
る。本発明は先端断面の媒体流入側の辺と媒体流出側の
辺、特に媒体流出側の辺の形状に特徴を有する。The basis of the present invention is a magnetic recording medium capable of perpendicular magnetization recording (i.e., cobalt chromium alloy thin film, barium alloy) 9
A particle coating film 2 isotropically oriented iron oxide fine particle coating 1 charcoal is used, and a single magnetic pole head is used as the magnetic head. A particularly important point is that the surface of the single-pole head facing the medium, that is, the cross-sectional shape of the tip is not the usual rectangular shape of the M11. The present invention is characterized by the shape of the side on the medium inflow side and the side on the medium outflow side of the cross section of the tip, particularly the side on the medium outflow side.
第1図に従来の垂直磁化記録方式の基不栴成を示す。第
1図(α)において上面にコバルトクロミウム合金薄膜
もしくはバリウムフェライト膜あるいはバリウムフエラ
イ) It粒子塗付膜を形成したPETあるいはポリイ
ミドもしくはアルミニウムの基板により構成されるテー
プもしくはディスク状の記録媒体1の上下に主磁極2と
補助磁極3が配置される。主磁極2は通常高透磁率の薄
膜で形成される。補助磁極3は通常コイル4を巻いたフ
ェライト等で形成される。コイル4に電流を流すことに
より補助磁極乙に形成された磁束は主磁極2に銹導され
、記録媒体上には主磁極2の先端により磁化が残される
。この場合記録媒体1の両側にヘッドが配置されるとい
う複雑な構造となるために片側に構成した例が第1図(
必)である。FIG. 1 shows the basic structure of a conventional perpendicular magnetization recording system. In FIG. 1 (α), a tape or disk-shaped recording medium 1 is constructed of a PET, polyimide, or aluminum substrate on which a cobalt-chromium alloy thin film, barium ferrite film, or barium ferrite film is formed. A main magnetic pole 2 and an auxiliary magnetic pole 3 are arranged above and below. The main pole 2 is usually formed of a thin film with high magnetic permeability. The auxiliary magnetic pole 3 is usually formed of ferrite or the like around which a coil 4 is wound. The magnetic flux formed in the auxiliary magnetic pole B by passing a current through the coil 4 is conducted to the main magnetic pole 2, and magnetization is left on the recording medium by the tip of the main magnetic pole 2. In this case, the head is arranged on both sides of the recording medium 1, resulting in a complicated structure, so an example in which the head is arranged on one side is shown in FIG.
(required).
この場合も記録媒体1と主磁極2の配置は変らないが、
主磁極2の上方にフェライト5を接触させ、そのまわり
にコイル6企巻いている。この様な構成をとっても記録
媒体1に残る磁化は第1図(α)と全く同様である。In this case as well, the arrangement of the recording medium 1 and the main magnetic pole 2 remains the same, but
A ferrite 5 is brought into contact above the main magnetic pole 2, and a coil 6 is wound around it. Even with such a configuration, the magnetization remaining in the recording medium 1 is exactly the same as that shown in FIG. 1 (α).
第2図に記録時の状況を更に詳しく図示する。FIG. 2 shows the situation during recording in more detail.
記録媒体1に残る磁化は先に述べた如く主磁極2の先端
形状に依存する。通常主磁極2は薄膜で形成されている
ために先端断面形状は長方形となっている。即ち長辺が
記録幅となり短辺が最小記録ビット長を支配する。通常
記録媒体1と主磁極2は相対的に移動しているために第
2図においては記″Rc媒体移動方向を矢印Aで示し、
主磁極1の移動方向を矢印Bで示す。AとBは当然反対
方向であり、磁化7は主磁極2の移動の後方即ち媒体流
出側に残る。従って磁化7のパターンの幅、即ちトラッ
ク幅は主磁極2の幅により決められる。磁化7の各ビッ
トの長さは主磁極2の後方即ち媒体流出側の辺と記録媒
体1の相対移動速度によって決められる。一つの信号が
印加されている時間と相対移動速度によりビット長が決
定する。The magnetization remaining in the recording medium 1 depends on the shape of the tip of the main magnetic pole 2, as described above. Since the main pole 2 is usually formed of a thin film, its tip has a rectangular cross-sectional shape. That is, the long side controls the recording width, and the short side controls the minimum recording bit length. Normally, the recording medium 1 and the main pole 2 move relative to each other, so in FIG. 2, the direction of movement of the medium is indicated by arrow A.
The moving direction of the main magnetic pole 1 is indicated by an arrow B. A and B are naturally in opposite directions, and the magnetization 7 remains behind the movement of the main magnetic pole 2, that is, on the medium outflow side. Therefore, the width of the pattern of magnetization 7, that is, the track width, is determined by the width of the main magnetic pole 2. The length of each bit of the magnetization 7 is determined by the relative moving speed of the recording medium 1 and the rear side of the main magnetic pole 2, that is, the side on the medium outflow side. The bit length is determined by the time that one signal is applied and the relative movement speed.
第6図には再生時の状況を示す。記録媒体1の上に記録
トラック71と72が磁化されている。FIG. 6 shows the situation during playback. Recording tracks 71 and 72 are magnetized on the recording medium 1.
主磁極2により再生されるべき部分8は点線で示してい
る。この場合ヘッドはトラック72をずれて隣のトラッ
ク71にまたがっている。促って瞬のトラックに侵入し
た分だけ主磁極2にはノイズとなって誘導される。従っ
て再生信号出力は小さくなりノイズが大となる。これを
さけるために通常記録トラックの両側に空白部をガート
バンドとして残しである。The portion 8 to be reproduced by the main pole 2 is shown in dotted lines. In this case, the head deviates from the track 72 and straddles the adjacent track 71. The amount of noise that enters the Shun track is induced into the main magnetic pole 2 as noise. Therefore, the reproduced signal output becomes small and the noise becomes large. To avoid this, blank areas are usually left as guard bands on both sides of the recording track.
本発明は主磁極先端形状を長方形ではなく、中心部と周
辺部の厚みを異ならせ、しかも媒体流出側の辺を非直線
として再生信号出力を最大ならしめ、ノイズレベルを最
小としたものである。In the present invention, the tip shape of the main magnetic pole is not rectangular, but has different thicknesses at the center and periphery, and the edge on the media outflow side is non-linear to maximize the reproduced signal output and minimize the noise level. .
第4図に本発明の主磁極先端形状の例を示す。FIG. 4 shows an example of the shape of the main pole tip of the present invention.
矢印Aは媒体移動方向、矢印Bはヘッド移動方向を示す
。(σ)、Ch)は媒体流出側の辺を屋根形、即ちシェ
ブロン形状となしたものである。Arrow A indicates the direction of medium movement, and arrow B indicates the direction of head movement. (σ), Ch) has a roof-shaped side on the medium outflow side, that is, a chevron shape.
CC)、Cd)は媒体流出側辺を円形としたものである
。(g)、CI)は媒体流出側を復円形としたものであ
る。(y ) e (h) = (’ )は更に媒体流
入側も非直線としたものである。以上中心部が周辺部よ
り厚いパターンを示している。()゛)、(7C)は中
心部が周辺部より薄いパターンの例を示す。これらの形
成はヘッド基板のエツチングとマスクスパッタ等を組み
合わせて行なわれる第5図に本発明により記録を行なう
状況を示す。主磁極2の媒体流入[tlllの辺9は直
線であり、媒体流出側の辺10はシェブロン形状となっ
ている。記録媒体1に残る磁化パターン11は媒体流出
側の辺10の形状を写してシェブロン形状となっている
。媒体流入側の辺9の形状は実質的には磁化として残ら
ない。CC) and Cd) have circular edges on the medium outflow side. (g) and CI) have a rectangular shape on the medium outflow side. (y) e (h) = (') further assumes that the medium inlet side is also non-linear. The pattern shown above is thicker in the center than in the periphery. ()゛) and (7C) show examples of patterns in which the center part is thinner than the peripheral part. These formations are performed by a combination of head substrate etching, mask sputtering, etc. FIG. 5 shows a situation in which recording is performed according to the present invention. The side 9 of the medium inflow [tllll] of the main magnetic pole 2 is a straight line, and the side 10 on the medium outflow side has a chevron shape. The magnetization pattern 11 remaining on the recording medium 1 has a chevron shape that mirrors the shape of the side 10 on the medium outflow side. The shape of the side 9 on the medium inflow side does not substantially remain as magnetization.
本発明による再生の状況を第6図に示す。記録磁化はト
ラック111とトラック112に残されている。主磁極
形状は第5図の場合と同じである。このヘッドによる再
生は媒体流入側の辺9は直線になっている。それに対し
トラック上の残留磁化111と112はシェブロン形状
である為に媒体流入側の辺9は複数の記録ビットにまた
がり媒体上の磁化による磁束変化はアジマス損失でなら
されてほとんど再生出力とならない。これはヘッドがト
ラック位置に完全に一致していても変らない。それに対
し媒体流出側の辺10においては元金にトラック位置に
一致すると最大の出力が得られ、トラックがずれると出
力が小さくなる。しかしノイズのレベルは変らない。従
ってヘッドを常に最大出力の得られる位置に微調整をす
ることにより完全にトラック上に一致させることができ
、従って隣接トラックとのクロストークが防止される。FIG. 6 shows the state of reproduction according to the present invention. Recorded magnetization remains in tracks 111 and 112. The main magnetic pole shape is the same as that shown in FIG. In reproduction by this head, the side 9 on the medium inflow side is a straight line. On the other hand, since the residual magnetizations 111 and 112 on the track have a chevron shape, the side 9 on the medium inflow side spans a plurality of recording bits, and changes in magnetic flux due to magnetization on the medium are smoothed out by azimuth loss, resulting in almost no reproduced output. This does not change even if the head is perfectly aligned with the track position. On the other hand, on the side 10 on the medium outflow side, the maximum output is obtained when the original coincides with the track position, and the output decreases when the track deviates. However, the noise level remains the same. Therefore, by finely adjusting the head to a position where the maximum output can be obtained, the head can be perfectly aligned with the track, thereby preventing crosstalk with adjacent tracks.
更に従来の主磁極で再生を行なう場合高密度記録の再生
を行なうにはその最小ビット長に対応する薄い膜を用い
なければならず、その為に高密度になるほど再生信号出
力は低下したが、本発明においては高密度記録の再生に
おいても主磁極厚を薄くする必要がないために高密度記
録の再生信号出力の低下は激しくない。本発明は基本的
には水平磁化記録媒体に対するリングヘッドの組み合わ
せでも可能であるが、ヘッドの作り易さからみた場合に
は垂直磁化成分を持つ媒体に対し、主磁極で記録再生を
行なう方式が最も適している。本発明の基本を更に詳し
く述べるとヘッド先端の形状において媒体流出側の辺の
形状がヘッド進行方向に対して直角もしくは片流れでは
なく、両流れとなっていることに特徴がある。従ってこ
の様な形状はリングヘッドでは困難で単磁極ヘッドの主
磁極において容易である。Furthermore, when reproducing with a conventional main magnetic pole, a thin film corresponding to the minimum bit length must be used to reproduce high-density recording, and as a result, the higher the density, the lower the reproduction signal output. In the present invention, there is no need to reduce the thickness of the main magnetic pole even when reproducing high-density recording, so the reproduction signal output during high-density recording does not decrease drastically. Although the present invention is basically possible by combining a ring head with a horizontally magnetized recording medium, from the viewpoint of ease of manufacturing the head, it is preferable to perform recording and reproducing with a main pole on a medium with a perpendicular magnetization component. most suitable. To describe the basics of the present invention in more detail, the shape of the head tip is characterized in that the shape of the side on the medium outflow side is not perpendicular to the head traveling direction or one-sided flow, but double-flow. Therefore, such a shape is difficult to form with a ring head, but is easy to form with the main pole of a single-pole head.
本発明の適用は当然広範な用途に対して可能であり、デ
ィスク、テープを問わず有効に活用されるが、記録再生
の波長特性において従来主磁極膜の厚みに支配されてい
た出力が低下する波長域がなくなったために広範な波長
帯域が活用可能となった。このために広い帯域を利用す
るVTRあるいは画像記録に特に有効と考えられる。特
にVTRの場合従来2ヘツドで行なわれていたアジマス
記録が1ヘツドでも可能であるためにテープをα巻きも
しくはΩ巻きとしてシリンダー径を従来のVTRの半分
とすることが可能となったためにVTRシステムは大幅
に小型軽量化が行なわれた。The present invention can of course be applied to a wide range of applications, and can be effectively utilized for both disks and tapes, but the wavelength characteristics of recording and reproduction will suffer from a decrease in output, which was conventionally controlled by the thickness of the main pole film. The elimination of wavelength ranges has made it possible to utilize a wide range of wavelengths. For this reason, it is considered to be particularly effective for VTRs or image recording that utilize a wide band. In particular, in the case of VTRs, azimuth recording, which was conventionally done with two heads, can now be done with one head, making it possible to wind the tape in α or Ω windings and reduce the cylinder diameter to half that of conventional VTRs. has been significantly reduced in size and weight.
又この場合ヘッドが1つになったために二つのヘッドの
位置を精密に調整する必要がなく、二つのヘッドの特性
の違いによるワウフラッタ−等もなくなった。又ディス
クにおいてもトリミング用のヘッドの必要もなく、ガー
トバンドの必安もないためにヘッド形状は単純化され、
ディスクの記録容量も倍増した。In addition, since there is only one head in this case, there is no need to precisely adjust the positions of the two heads, and wow and flutter caused by differences in the characteristics of the two heads are also eliminated. Also, since there is no need for a trimming head for discs, and there is no need for a guard band, the head shape is simplified.
The recording capacity of the disc has also doubled.
以上詳述した如く本発明の磁気記録装置はその工業的利
用価値は非常に高いものである。As detailed above, the magnetic recording device of the present invention has very high industrial utility value.
【図面の簡単な説明】
は本発明を説明する図である。
1・・・・・・・・・記録媒体
2・・・・・・・・・主磁極
6・・−・・・・・・補助磁極
4 ・・・ ・・・ ・・・ コ イ ル5・・・・・
・・・・フェライト
6・・・・・・・・・コイル
7・・・・・・・・・記録磁化
71・・・・・・記録トラック
72・・・・・・記録トラック
8・・・・・す・・ヘット位置
?・・・・・・・・・媒体流入辺
10・・・・・・媒体流山辺
11・・・・・・記録磁化
111・・・記録トラック
112・・・記録トラック
12・・・・・・ヘッド位置
以 上
出願人 株式会社諏訪精工舎
代理人 弁理士 最上 務BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating the present invention. 1...Recording medium 2...Main magnetic pole 6...Auxiliary magnetic pole 4... Coil 5・・・・・・
... Ferrite 6 ... ... Coil 7 ... Recording magnetization 71 ... Recording track 72 ... Recording track 8 ... ...Het position? ......Medium inflow side 10...Medium flow top side 11...Recording magnetization 111...Recording track 112...Recording track 12... Head position and above Applicant Suwa Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami
Claims (1)
の磁気災ツドを備えた磁気記録装置において、該主磁極
の媒体に対向する面の先端形状において中心部と周辺部
の厚みが異なり、しかも媒体流出側の辺が非直線である
磁気ヘッドを備えたことをq!@とする磁気記録装置。In a magnetic recording device using a recording medium containing a perpendicular magnetization component and equipped with a main a-pole type magnetic disturbance, the thickness of the central part and the peripheral part of the tip shape of the surface of the main pole facing the medium is Q! A magnetic recording device that makes @.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18960482A JPS5979416A (en) | 1982-10-28 | 1982-10-28 | Magnetic recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18960482A JPS5979416A (en) | 1982-10-28 | 1982-10-28 | Magnetic recorder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5979416A true JPS5979416A (en) | 1984-05-08 |
JPH0376524B2 JPH0376524B2 (en) | 1991-12-05 |
Family
ID=16244086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18960482A Granted JPS5979416A (en) | 1982-10-28 | 1982-10-28 | Magnetic recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5979416A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6277411U (en) * | 1985-11-01 | 1987-05-18 | ||
US4675765A (en) * | 1983-12-20 | 1987-06-23 | Victor Company Of Japan, Ltd. | Magnetic recording and/or reproducing element |
EP1148473A3 (en) * | 2000-04-10 | 2006-10-18 | Samsung Electronics Co., Ltd. | Method and apparatus for perpendicular magnetic recording |
WO2008136083A1 (en) * | 2007-04-23 | 2008-11-13 | Fujitsu Limited | Magnetic recording apparatus, recording head, and magnetic recording method |
US7475470B2 (en) | 2001-03-19 | 2009-01-13 | Hitachi Global Storage Technologies, Ltd. | Method for manufacturing a magnetic head for perpendicular recording |
US8824101B2 (en) * | 2012-10-08 | 2014-09-02 | Seagate Technology Llc | Write pole tip with trailing edge recess |
-
1982
- 1982-10-28 JP JP18960482A patent/JPS5979416A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675765A (en) * | 1983-12-20 | 1987-06-23 | Victor Company Of Japan, Ltd. | Magnetic recording and/or reproducing element |
JPS6277411U (en) * | 1985-11-01 | 1987-05-18 | ||
EP1148473A3 (en) * | 2000-04-10 | 2006-10-18 | Samsung Electronics Co., Ltd. | Method and apparatus for perpendicular magnetic recording |
US7475470B2 (en) | 2001-03-19 | 2009-01-13 | Hitachi Global Storage Technologies, Ltd. | Method for manufacturing a magnetic head for perpendicular recording |
WO2008136083A1 (en) * | 2007-04-23 | 2008-11-13 | Fujitsu Limited | Magnetic recording apparatus, recording head, and magnetic recording method |
US8824101B2 (en) * | 2012-10-08 | 2014-09-02 | Seagate Technology Llc | Write pole tip with trailing edge recess |
Also Published As
Publication number | Publication date |
---|---|
JPH0376524B2 (en) | 1991-12-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3083218B2 (en) | Thin film magnetic head | |
JPH0415521B2 (en) | ||
US4622614A (en) | Magnetic erasing head | |
JPS5979416A (en) | Magnetic recorder | |
JP3447164B2 (en) | Magnetic recording / reproducing device | |
JP2513746B2 (en) | Perpendicular magnetic recording media | |
JPS5996517A (en) | Magnetic recording and reproducing method | |
JPS6214302A (en) | Magnetic recording and reproducing device with high density | |
JP2677899B2 (en) | Magnetic head | |
JPH04214271A (en) | Thin-film magnetic head and recording and reproducing method | |
JPH0210509A (en) | Thin film magnetic head for perpendicular magnetic recording | |
JPS6364602A (en) | Floppy disk drive | |
JPS63306507A (en) | Thin film magnetic head | |
JP3044808B2 (en) | Magnetic head | |
JPS63103403A (en) | Magnetic head | |
JPH0447365B2 (en) | ||
JPH05101310A (en) | Magnetic recording method | |
JPH04351701A (en) | Magnetic recording method for magnetic recording medium | |
JPH05101301A (en) | Magnetic recorder | |
JPS62185212A (en) | Magnetic recording head | |
JPH03219414A (en) | Data surface servo system | |
JPS5979402A (en) | Magnetic recorder | |
JPS60170012A (en) | Composite magnetic head | |
JPS6185611A (en) | Composite magnetic head | |
JPH01220119A (en) | Magnetic recording medium |