JPS6226084B2 - - Google Patents

Info

Publication number
JPS6226084B2
JPS6226084B2 JP3631577A JP3631577A JPS6226084B2 JP S6226084 B2 JPS6226084 B2 JP S6226084B2 JP 3631577 A JP3631577 A JP 3631577A JP 3631577 A JP3631577 A JP 3631577A JP S6226084 B2 JPS6226084 B2 JP S6226084B2
Authority
JP
Japan
Prior art keywords
magnetic
magnetic pole
pole
main
auxiliary
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.)
Expired
Application number
JP3631577A
Other languages
Japanese (ja)
Other versions
JPS53121608A (en
Inventor
Atsunori Hayakawa
Shigeo Norihashi
Kyoshi Satake
Toshiki Shimamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP3631577A priority Critical patent/JPS53121608A/en
Publication of JPS53121608A publication Critical patent/JPS53121608A/en
Publication of JPS6226084B2 publication Critical patent/JPS6226084B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/1278Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Description

【発明の詳細な説明】 本発明は、高周波高密度記録を可能にした磁気
記録装置に係わる。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording device that enables high-frequency, high-density recording.

磁気記録媒体、例えば磁気テープに、高周波
(短波長)信号を磁気記録する場合、磁気テープ
の面方向に沿う磁化によつてその記録を行う方法
よりも、磁気テープの厚さ方向、いわゆる垂直磁
化によつてその記録を行う方法の方が有利である
ことが知られている。
When magnetically recording high frequency (short wavelength) signals on a magnetic recording medium, such as a magnetic tape, recording is performed by magnetization in the thickness direction of the magnetic tape, so-called perpendicular magnetization, rather than by magnetization along the surface direction of the magnetic tape. It is known that the method of recording the information by using the method is more advantageous.

この垂直磁化による記録方法としては、種々の
ものが提案されている。
Various methods have been proposed as recording methods using perpendicular magnetization.

第1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磁気記録媒体1の磁性面に
対接ないしは対向して針状磁極2(実際にはトラ
ツク幅方向に厚みを有するが、簡単のため針状磁
極とする。以下同様)より成る単極型構成の磁気
ヘツドhを配置し、これによつて垂直磁化による
記録を行うものである。3は励磁巻線(信号巻
線)である。ところが、この方法では、磁気ヘツ
ドhによつて十分大きな垂直磁化を得難く、記録
電流を多く必要とし記録効率がよくない。また記
録磁界が飽和し易いという欠点もある。
Figure 1 shows an example. In this example,
An acicular magnetic pole 2 (actually, it has a thickness in the track width direction, but for simplicity, it is assumed to be an acicular magnetic pole; the same applies hereinafter) is placed opposite or opposite to the magnetic surface of the magnetic recording medium 1 traveling in the direction of the arrow. A magnetic head h having a unipolar configuration is arranged, and recording is performed by perpendicular magnetization. 3 is an excitation winding (signal winding). However, with this method, it is difficult to obtain a sufficiently large perpendicular magnetization with the magnetic head h, and a large recording current is required, resulting in poor recording efficiency. Another disadvantage is that the recording magnetic field is easily saturated.

他の例としては第2図に示すように、第1図に
説明したと同様の単極型磁気ヘツドhを用いる
も、磁気媒体1の背部に磁気ヘツドhに対向して
高透磁率体4を裏打ちする方法がある。この方法
による場合、磁気媒体1を挾んで磁気ヘツドhに
対向して高透磁率体4が配置されたことによつ
て、第1図の方法による場合に比し、垂直磁界に
関する改善ははかられるが、この場合においても
記録磁界の飽和に関しては十分な改善はみられな
い。
Another example, as shown in FIG. 2, is to use a single-pole magnetic head h similar to that described in FIG. There is a way to back it up. In this method, since the high magnetic permeability material 4 is placed opposite the magnetic head h with the magnetic medium 1 in between, there is no improvement in the perpendicular magnetic field compared to the method shown in FIG. However, even in this case, there is no sufficient improvement in saturation of the recording magnetic field.

第3図に示す例においては、磁気記録媒体1を
挾んで、巻線3が巻装された主磁極2に対向させ
て補助磁極5を設けて成る磁気ヘツドhを用いた
場合で、第4図に示す例は、巻線3を補助磁極5
に巻装した場合である。
In the example shown in FIG. 3, a magnetic head h is used in which an auxiliary magnetic pole 5 is provided to sandwich the magnetic recording medium 1 and face the main magnetic pole 2 around which the winding 3 is wound. In the example shown in the figure, the winding 3 is connected to the auxiliary magnetic pole 5.
This is the case when it is wrapped in

第1図ないし第3図の例では、主磁極1の巻線
3が施された部分が先に飽和して主磁極1の先端
から十分な磁界が出ず記録効率が左程高められな
いものであるに比し、第4図の例では、補助磁極
5上に巻線3が施されていることによつて飽和の
心配のない補助磁極の磁界が主磁極2の先端に集
中するので主磁極は飽和しにくく良好な記録効率
が得られる。しかしながら、このように主磁極2
と補助磁極5とが、磁気媒体1を挾んで対向する
ものにおいては磁気媒体1がデイスク型の場合
や、空気浮動型の場合には適用し難いという欠点
もあり、また主磁極2と補助磁極5の相互の位置
合せが難しいという欠点がある。
In the examples shown in Figures 1 to 3, the part of the main magnetic pole 1 where the winding 3 is applied saturates first, and a sufficient magnetic field is not generated from the tip of the main magnetic pole 1, so that the recording efficiency cannot be increased as much. In contrast, in the example shown in Fig. 4, the winding 3 is provided on the auxiliary magnetic pole 5, so that the magnetic field of the auxiliary magnetic pole, which is free from saturation, is concentrated at the tip of the main magnetic pole 2. The magnetic poles are less likely to be saturated and good recording efficiency can be obtained. However, in this way, the main magnetic pole 2
In the case where the main magnetic pole 2 and the auxiliary magnetic pole 5 face each other with the magnetic medium 1 in between, there is a drawback that it is difficult to apply when the magnetic medium 1 is a disk type or an air floating type. 5 is difficult to align with each other.

そして、このような欠点を回避するものとし
て、第5図に示すように、主磁極2と補助磁極5
とが、共に、磁気媒体1の磁性面と対接ないしは
対向する同一面を形成するように配置するものが
提案された。この場合、補助磁極5は、磁気媒体
1の磁気ヘツドhに対する走行方向(矢印)に関
して後方側に、主磁極2の媒体1に対する対接な
いしは対向面の幅より十分大なる幅をもつて並置
配列する。この方法によれば、上述したデイスク
型のものや、空気浮動型のものに適用することが
できるが、この場合、十分に大なる垂直磁界を得
ようとするとギヤツプを通つて補助磁極へ逃げる
磁束もあるため、主磁極が飽和しやすくなる。
In order to avoid such drawbacks, as shown in FIG. 5, the main magnetic pole 2 and the auxiliary magnetic pole 5
It has been proposed that both of the magnetic surfaces of the magnetic medium 1 are arranged so as to form the same surface facing or facing the magnetic surface of the magnetic medium 1. In this case, the auxiliary magnetic poles 5 are arranged side by side on the rear side with respect to the running direction (arrow) of the magnetic medium 1 with respect to the magnetic head h, with a width sufficiently larger than the width of the surface of the main magnetic pole 2 that faces or faces the medium 1. do. This method can be applied to the above-mentioned disk type or air floating type, but in this case, when trying to obtain a sufficiently large vertical magnetic field, the magnetic flux escapes through the gap to the auxiliary magnetic pole. Because of this, the main magnetic pole is likely to become saturated.

これに比し、第6図に示すように、主磁極2の
両側に、これより比較的離間し且つ主磁極2の媒
体1に対する対接ないしは対向面とほぼ同一面を
形成するように補助磁極5が設けられて成る磁気
ヘツドhを構成すると共に、磁気媒体1を挾ん
で、両磁極2及び5間に差し渡つて対向する高透
磁率体4を配置した構成とする場合は、主磁極2
と、高透磁率体4と、補助磁極5との間にいわ
ば、閉磁路のリターンパスが形成されるので、比
較的高い記録効率が得られ、また飽和が生じにく
い。
In contrast, as shown in FIG. 6, auxiliary magnetic poles are provided on both sides of the main magnetic pole 2 so as to be relatively spaced apart from the main magnetic pole 2 and to form substantially the same surface as the surface of the main magnetic pole 2 that faces or faces the medium 1. When constructing a magnetic head h consisting of a main magnetic pole 5 and a high magnetic permeability body 4 facing across between both magnetic poles 2 and 5 with the magnetic medium 1 sandwiched between them, the main magnetic pole 2
Since a so-called closed magnetic return path is formed between the high magnetic permeability body 4 and the auxiliary magnetic pole 5, relatively high recording efficiency can be obtained and saturation is less likely to occur.

しかしながら、上述した第1図ないし第6図の
何れの例においても、磁気媒体1への記録を垂直
磁化によつてなすにも拘わらず、高密度記録が左
程改善されていない。
However, in any of the examples shown in FIGS. 1 to 6 described above, high-density recording has not been improved to the left even though recording on the magnetic medium 1 is performed by perpendicular magnetization.

本発明者等は種々の実験考察を重ねた結果、第
1図ないし第6図に示した記録方法においては、
磁気媒体1への記録磁界の分布が、媒体1の磁気
ヘツドhに対する移行方向に関して先方側、云い
換えれば、磁気媒体1の磁気ヘツドhよりの逃げ
の方向側の分布の勾配が緩かで裾を引き、この裾
の部分によつて媒体1の記録が最終的に減磁され
てしまうことに因ることを究明した。例えば、第
7図に示すように、第2図で説明した単極型磁気
ヘツドhを用い、高透磁率体4を配置した場合に
おいて、磁気記録媒体が配置される面に沿い媒体
の走行方向をx方向とし、これと直交する媒体の
厚さ方向をy方向とし、原点を主磁極2の磁気媒
体との対接ないしは対向面12の中心に置いた場
合の、x方向に沿う各位置のy方向磁界の強さ
Hyを相対値で表わすと第8図に示すようにな
る。この例では、主磁極2の面2Aの幅を11μm
に、面2Aと高透磁率体4との間隔を5.5μmに
配置した場合で、同図中各曲線6a,6b,6
c、……6jは、夫々y=0.5,1.0,1.5,……
5.0(μm)における磁界分布曲線である。因み
に第7図に示すように磁極2に対向して高透磁率
体4を配置した場合は、同図中に破線図示の磁極
2′を、高透磁率体4の、磁極2との対向面に関
して磁極2と共軛関係に配置したと等価の磁界分
布を呈する。
As a result of various experiments and considerations, the present inventors found that the recording methods shown in FIGS. 1 to 6,
The distribution of the recording magnetic field on the magnetic medium 1 has a slope on the far side with respect to the direction of movement of the medium 1 with respect to the magnetic head h, in other words, the gradient of the distribution on the side in the direction of escape from the magnetic head h of the magnetic medium 1 is gentle. They found that this is due to the fact that the recording on the medium 1 is eventually demagnetized by this tail portion. For example, as shown in FIG. 7, when the unipolar magnetic head h explained in FIG. is the x direction, the thickness direction of the medium perpendicular to this is the y direction, and the origin is placed at the center of the main magnetic pole 2 facing the magnetic medium or at the center of the opposing surface 12. Y-direction magnetic field strength
When Hy is expressed as a relative value, it becomes as shown in Fig. 8. In this example, the width of the surface 2A of the main pole 2 is 11 μm.
In the case where the distance between the surface 2A and the high permeability body 4 is 5.5 μm, each curve 6a, 6b, 6 in the figure
c, ...6j are respectively y=0.5, 1.0, 1.5, ...
This is a magnetic field distribution curve at 5.0 (μm). Incidentally, when the high magnetic permeability material 4 is placed opposite the magnetic pole 2 as shown in FIG. It exhibits a magnetic field distribution equivalent to arranging it in a mutually exclusive relationship with the magnetic pole 2.

本発明は、上述した点に鑑み、その記録磁界分
布を、磁気記録媒体の逃げの方向に関して急激に
立ち下るようにして、この裾の部分での減磁効果
が生じないようにして、高密度記録を可能にし、
更に高い記録効率を得るようにした新規な磁気記
録装置を提供せんとするものである。
In view of the above-mentioned points, the present invention makes the recording magnetic field distribution fall sharply with respect to the escape direction of the magnetic recording medium, so that the demagnetization effect does not occur at the bottom part, and the recording magnetic field is high-density. enable recording,
It is an object of the present invention to provide a new magnetic recording device that achieves even higher recording efficiency.

即ち、本発明においては、その記録磁界分布
が、この磁界中を通過する磁気記録媒体の逃げの
側の縁部において、より急峻に立ち下るようにす
るものである。
That is, in the present invention, the recording magnetic field distribution is made to fall more steeply at the edge of the escape side of the magnetic recording medium that passes through this magnetic field.

第9図を参照して本発明による磁気記録装置の
一例の基本的構成を説明するに、図中21は磁気
記録媒体、例えば磁気テープを示し、この媒体2
1は非磁性ベース21A上に磁性層21Bが塗布
されて成る。この媒体21は記録磁界に対し相対
的に移行するように、例えば矢印22で示す方向
に走行するものとする。
The basic configuration of an example of a magnetic recording device according to the present invention will be described with reference to FIG.
1 consists of a magnetic layer 21B coated on a non-magnetic base 21A. It is assumed that this medium 21 travels, for example, in the direction shown by an arrow 22 so as to move relative to the recording magnetic field.

本発明においては、磁気記録媒体21の磁性層
21B側に対接ないしは極く近接対向して主磁極
23を配置すると共に、これに隣合つて補助磁極
24を配置し、更に媒体21を挾んで両磁極23
及び24に差し渡つて対向する高透磁率体25を
配置する。補助磁極24は、磁気媒体21の、主
磁極23よりの逃げ側、即ち矢印22で示す媒体
21の走行方向の先方側において主磁極23と隣
合つて配置する。従つて、磁気媒体21が主磁極
23に対向した後続いて補助磁極24に対向する
ごとく、主磁極23と補助磁極24を配置する。
In the present invention, the main magnetic pole 23 is disposed opposite to or very closely opposed to the magnetic layer 21B side of the magnetic recording medium 21, and the auxiliary magnetic pole 24 is disposed adjacent to the main magnetic pole 23, and furthermore, the auxiliary magnetic pole 24 is disposed with the medium 21 in between. Both magnetic poles 23
A high magnetic permeability body 25 is arranged facing across and 24. The auxiliary magnetic pole 24 is arranged adjacent to the main magnetic pole 23 on the escape side of the magnetic medium 21 from the main magnetic pole 23, that is, on the forward side in the running direction of the medium 21 as indicated by the arrow 22. Therefore, the main magnetic pole 23 and the auxiliary magnetic pole 24 are arranged so that the magnetic medium 21 faces the main magnetic pole 23 and then faces the auxiliary magnetic pole 24.

主磁極23及び補助磁極24は、磁気ヘツド素
子Hとして機械的に一体化して構成し、主磁極2
3の前端―高透磁率体25―補助磁極24の前端
―補助磁極24の後端―主磁極23の後端―……
なる磁路を形成するようになす。
The main magnetic pole 23 and the auxiliary magnetic pole 24 are mechanically integrated as a magnetic head element H, and the main magnetic pole 23 and the auxiliary magnetic pole 24 are
3 - front end of high magnetic permeability body 25 - front end of auxiliary magnetic pole 24 - rear end of auxiliary magnetic pole 24 - rear end of main magnetic pole 23 -...
so as to form a magnetic path.

主磁極23及び補助磁極24は、通常の磁気ヘ
ツドにおけるコア材のように高い透磁率を有する
フエライト、パーマロイ、センダスト等によつて
形成し得る。
The main magnetic pole 23 and the auxiliary magnetic pole 24 can be made of ferrite, permalloy, sendust, or the like, which have high magnetic permeability, like the core material in a typical magnetic head.

主磁極23、又はこれと補助磁極24の厚み
は、磁極記録媒体21上の記録トラツク幅に対応
した厚さに選定されるが、補助磁極24の媒体2
1の走行方向に関する前端面の幅すなわち前端面
の磁気記録媒体21の移行方向に沿つた長さe
は、主磁極23の前端面の磁気記録媒体21の移
行方向に沿つた長さ2bより十分大、例えば e/2b≫10 ……(1) に選定する。
The thickness of the main magnetic pole 23 or the thickness of the main magnetic pole 23 and the auxiliary magnetic pole 24 is selected to correspond to the recording track width on the magnetic pole recording medium 21.
1, the width of the front end surface in the running direction of the magnetic recording medium 21, that is, the length e of the front end surface along the migration direction of the magnetic recording medium 21.
is selected to be sufficiently larger than the length 2b of the front end surface of the main pole 23 along the direction of movement of the magnetic recording medium 21, for example, e/2b≫10 (1).

また、補助磁極24は、主磁極23より磁気的
に、媒体21から離間させる。即ち補助磁極24
の、その高透磁率性材料部分の媒体21との対向
面24Aは、主磁極23の媒体21との対接ない
しは対向面23Aより距離dだけ後退した位置に
存するようになす。そして、ここに、この距離d
と、主磁極23の面23A及び高透磁率体25間
の間隔aとの関係は、 0.06〓d/a〓5 ……(2) に選定されることが望ましい。
Further, the auxiliary magnetic pole 24 is magnetically spaced further away from the medium 21 than the main magnetic pole 23 . That is, the auxiliary magnetic pole 24
The surface 24A of the high magnetic permeability material portion facing the medium 21 is located at a distance d from the surface 23A of the main pole 23 facing or facing the medium 21. And here, this distance d
The relationship between this and the distance a between the surface 23A of the main pole 23 and the high magnetic permeability body 25 is preferably selected as follows: 0.06〓d/a〓5...(2).

また、主磁極23と補助磁極24との各前端部
間の距離cは、 2b〓c〓2b/10 ……(3) に選ばれることが望ましい。
Further, the distance c between the front ends of the main magnetic pole 23 and the auxiliary magnetic pole 24 is desirably selected as follows: 2b〓c〓2b/10 (3).

高透磁率体25は、第9図に示したように、磁
気記録媒体21と別体に構成し、媒体21の背面
に配置することもできるが、媒体21自体にこれ
と一体に、例えばその非磁性ベース21Aの裏面
に被着して構成することもできるし、非磁性ベー
ス21Aに代えて高透磁率ベースとして構成する
こともできる。
As shown in FIG. 9, the high magnetic permeability body 25 can be configured separately from the magnetic recording medium 21 and placed on the back surface of the medium 21, but it can also be configured integrally with the medium 21 itself, for example. It can be configured by being attached to the back surface of the non-magnetic base 21A, or it can be configured as a high magnetic permeability base in place of the non-magnetic base 21A.

そして、主磁極23又は補助磁極24に、励磁
巻線、即ち記録信号巻線26を巻装する。
Then, an excitation winding, that is, a recording signal winding 26 is wound around the main magnetic pole 23 or the auxiliary magnetic pole 24.

主磁極23、及び補助磁極24は、第10図に
示すように、2つの磁気コアを合体して構成し得
る。
The main magnetic pole 23 and the auxiliary magnetic pole 24 can be constructed by combining two magnetic cores, as shown in FIG.

また、補助磁極24の、媒体21との対向面2
4Aの、主磁極23と対向する側の縁部には、切
り落し部24Bを形成し得る。
In addition, the surface 2 of the auxiliary magnetic pole 24 facing the medium 21
A cut-off portion 24B may be formed at the edge of 4A on the side facing the main magnetic pole 23.

尚、上述した例では、主磁極23の、媒体21
が逃げる側にのみ隣合つて補助磁極24を配置し
た場合であるが、第11図に示すように、反対側
にも、同様の補助磁極24を配置した構成とする
こともできる。そして、このように主磁極23の
両側に補助磁極24を配置する場合は、前記(1)式
における幅eは両磁極24の幅の和となる。即
ち、磁気媒体の進入側にも補助磁極を配置する場
合において逃げ側の補助磁極の幅eは主磁極の幅
2bの10倍よりも小の例えば2〜3倍程度であつ
てもよい。
In addition, in the above-mentioned example, the medium 21 of the main magnetic pole 23
Although this is a case in which the auxiliary magnetic poles 24 are arranged adjacent to each other only on the side where the auxiliary magnetic poles escape, it is also possible to arrange similar auxiliary magnetic poles 24 on the opposite side as shown in FIG. When the auxiliary magnetic poles 24 are disposed on both sides of the main magnetic pole 23 in this way, the width e in the above equation (1) becomes the sum of the widths of both magnetic poles 24. That is, when an auxiliary magnetic pole is also arranged on the entrance side of the magnetic medium, the width e of the auxiliary magnetic pole on the escape side is the width of the main magnetic pole.
2b may be smaller than 10 times, for example, about 2 to 3 times.

そして、この場合、巻線26は主磁極23上に
巻装する。
In this case, the winding 26 is wound on the main pole 23.

また、主磁極23と、補助磁極24との各前方
端の間隔cは、両者間にガラス等の非磁性材27
を介存して、所要の間隔に保持する。そして、主
磁極23と、補助磁極24とは両者の後端間に接
着剤を介存して一体化する。
Further, the distance c between the front ends of the main magnetic pole 23 and the auxiliary magnetic pole 24 is such that a non-magnetic material such as glass is inserted between them.
to maintain the required spacing. Then, the main magnetic pole 23 and the auxiliary magnetic pole 24 are integrated with an adhesive interposed between their rear ends.

補助磁極24の面24Aは、主磁極23の面よ
り距離dだけ、後退させるものであるが、磁極2
4の面24Aに、磁極24の透磁率に比し、格段
的に低い透磁率を有するか完全に非磁性の表面層
28を被着し、機械的にはその表面が、主磁極2
3の面23Aと同一の面、即ち磁気媒体21に対
する同一の対接ないしは対向面を形成するように
なすこともできる。そして、このように、表面層
28を形成する場合には、前述の(2)式は、 0.06〓d/aμ〓5 ……(2)′ となる。ここにμは低透磁率ないしは完全に非磁
性の表面層28の比透磁率である。
The surface 24A of the auxiliary magnetic pole 24 is set back by a distance d from the surface of the main magnetic pole 23.
A surface layer 28 having a magnetic permeability significantly lower than that of the magnetic pole 24 or being completely non-magnetic is deposited on the surface 24A of the main magnetic pole 24, and mechanically, the surface layer 28 is completely non-magnetic.
It is also possible to form the same surface as the surface 23A of No. 3, that is, the same surface facing or facing the magnetic medium 21. When the surface layer 28 is formed in this way, the above-mentioned equation (2) becomes 0.06〓d/aμ〓5 . . . (2)'. Here, μ is the relative magnetic permeability of the surface layer 28, which has low magnetic permeability or is completely non-magnetic.

上述の本発明方式において巻線26に記録せん
とする信号電流を通ずると、その記録磁界は主と
して、主磁極23の前端面とこれに対向する高透
磁率体25間において、磁気記録媒体21の磁性
層21Bをその厚さ方向に横切つて垂直磁界とし
て生じ、この磁界に対し媒体21が相対的に移行
するように、前述したように媒体21を矢印22
の方向に移行させる。
When a signal current for recording is passed through the winding 26 in the method of the present invention described above, the recording magnetic field is generated mainly between the front end surface of the main magnetic pole 23 and the high magnetic permeability body 25 facing the main magnetic pole 23. The medium 21 is moved along the arrow 22 as described above so that a perpendicular magnetic field is generated across the magnetic layer 21B in the thickness direction, and the medium 21 is moved relative to this magnetic field.
move in the direction of

次に、第13図〜第17図を参照して第12図
に示した構成による磁気ヘツド素子Hをフエライ
トを用いて製造する製法の一例を説明しよう。
Next, an example of a manufacturing method for manufacturing the magnetic head element H having the configuration shown in FIG. 12 using ferrite will be explained with reference to FIGS. 13 to 17.

先ず、第13図に示すように、例えば、フエラ
イト等のコア材となる2つのブロツク体30及び
31を用意する。一方のブロツク体には、例えば
溝31Aが設けられ、その断面がほぼコ字状とさ
れる。
First, as shown in FIG. 13, two blocks 30 and 31, which are core materials such as ferrite, are prepared. One block body is provided with a groove 31A, for example, and its cross section is approximately U-shaped.

次に、第14図に示すように、両ブロツク体3
0及び31をその溝31Aを内側にして対向さ
せ、ガラス32等によつて接着合体する。この場
合、両ブロツク体30及び31の各前方端間は、
最終的に得る主磁極及び補助磁極間の間隔に対応
する所要の間隔に選定される。
Next, as shown in FIG.
0 and 31 are placed facing each other with their grooves 31A facing inside, and are bonded together using glass 32 or the like. In this case, between each front end of both block bodies 30 and 31,
A required spacing corresponding to the final spacing between the main magnetic pole and the auxiliary magnetic pole is selected.

次に必要に応じて、第15図に示すように、ブ
ロツク体30の外側を前端側に向つて漸次肉薄に
するように切削する。
Next, if necessary, as shown in FIG. 15, the outside of the block body 30 is cut so as to become gradually thinner toward the front end.

そして、第16図に示すように、ブロツク体3
1の前方端のみを化学的エツチング、その他適当
の方法によつて所要の厚さDだけ除去し、これに
非磁性ないしはブロツク体30及び31に比し格
段的に低い透磁率を有する表面層28を、ブロツ
ク体30の前方端と同一面を形成するように被着
するか、或いはブロツク体31の前方端をエツチ
ングして後、或いはエツチングすることなく、こ
の前方端にこのブロツク体31がフエライトであ
る場合、Zn、Al、Mg等のイオンをイオンインプ
ランテーシヨンにより低透磁率の表面層28を形
成する。
Then, as shown in FIG.
Only the front end of block 1 is removed by a required thickness D by chemical etching or other suitable method, and then a surface layer 28 that is non-magnetic or has a significantly lower magnetic permeability than the blocks 30 and 31 is added. The block body 31 is coated so as to form the same surface as the front end of the block body 30, or after the front end of the block body 31 is etched, or without etching, the block body 31 is coated with ferrite. In this case, a surface layer 28 with low magnetic permeability is formed by ion implantation with ions such as Zn, Al, Mg, etc.

その後、第17図に互に合体されたブロツク体
30及び31を所要の厚さに切断し、溝31Aを
通じて巻線26を巻装すれば磁気ヘツド素子Hが
得られる。
Thereafter, the blocks 30 and 31 that have been combined as shown in FIG. 17 are cut to a desired thickness, and the winding wire 26 is wound through the groove 31A to obtain the magnetic head element H.

今、上述した本発明による磁気記録装置におい
て、第18図に示すように高透磁率体25に対向
して主磁極23と補助磁極24を配置し、a=
5.5μm、b=5.5μm、c=2.2μm、d=2.2μ
mに選定し、e=∞とした場合の、磁極23の面
23Aの中央に原点をとつたx方向の、y=
0.5、1.0、1.5……5.0(μm)におけるy方向磁
界Hyの分布をみると、第19図中曲線41a,
41b,41c……41jとなる。ここにH+
H-は互に逆向きの磁界を示すもので、これより
明らかなように、主磁極23に隣合つて磁気的に
これより後退した位置に、補助磁極24を配する
ときは、主磁極23より補助磁極24側の一部
に、逆向きの磁界H-が存在する。そして、この
逆向きの磁界H-が存在する磁界分布は急峻に立
ち下つている。
Now, in the magnetic recording device according to the present invention described above, as shown in FIG.
5.5μm, b=5.5μm, c=2.2μm, d=2.2μm
m, and e=∞, in the x direction with the origin at the center of the surface 23A of the magnetic pole 23, y=
Looking at the distribution of the y-direction magnetic field Hy at 0.5, 1.0, 1.5...5.0 (μm), curves 41a,
41b, 41c...41j. H + here,
H - indicates magnetic fields in opposite directions, and as is clear from this, when the auxiliary magnetic pole 24 is arranged at a position adjacent to the main magnetic pole 23 and magnetically retreated from this, the main magnetic pole 23 A magnetic field H in the opposite direction exists in a part closer to the auxiliary magnetic pole 24 . The magnetic field distribution where this magnetic field H - in the opposite direction exists falls steeply.

また第20図の磁界分布曲線は、第18図の配
置において、a=5.5μm、b=5.5μm、c=2.2
μm、d=1.1μm、e=∞とし、補助磁極24
と、対向高透磁率体4との間の比透磁率μが10で
ある場合の比較例について示したもので、同図中
各曲線51a,51b,51c……51jは、y
=0.5、1.0、1.5……5.0(μm)の位置で各分布
曲線である。この場合においても、主磁極23よ
り補助磁極24側の一部に、逆向きの磁界H-
存在し、これによつて急峻な立下りが生じてい
る。
In addition, the magnetic field distribution curve in Fig. 20 is a = 5.5 μm, b = 5.5 μm, c = 2.2 in the arrangement shown in Fig. 18.
μm, d=1.1μm, e=∞, auxiliary magnetic pole 24
This figure shows a comparative example in which the relative magnetic permeability μ between the y and the opposing high permeability body 4 is 10.
=0.5, 1.0, 1.5... each distribution curve at the position of 5.0 (μm). In this case as well, there is a magnetic field H - in the opposite direction in a part of the auxiliary magnetic pole 24 side of the main magnetic pole 23, which causes a steep fall.

上述したように逆向きの磁界が生ずるようにす
るときは、立下りの急峻な磁界分布を得ることが
できるが、この逆向きの磁界H-は、これが余り
大きいと磁界H+によつて磁気記録媒体上に記録
(磁化)したものが媒体の相対的移行に伴つてこ
の磁界H-によつて減磁ないしは消磁される場合
がある。かかる不都合を避けるために磁界H-
ピーク値H- pは、磁界H+のピーク値H+ pに比し十
分小さく選ぶことが望まれる。そして、この磁界
H-と磁界H+とは、実験の結果から、その比が
H- p/H+ p≒0.345に選ばれることが望ましいこと
が判り、このように、H- p/H+ p≒0.345とするた
めには、前記(2)式で示したように、dとaの比
が、 0.06〓d/a であることが要求されることが確められた。しか
しながらこのd/aが余り大きくなると、即ち補助
磁極24が主磁極23より後退してしまうと、こ
の補助磁極24の存在の効果が失われてくるの
で、このd/aは5以下に、即ち(2)式の関係に選ば
れることが望ましい。
As mentioned above, when a magnetic field in the opposite direction is generated, a magnetic field distribution with a steep fall can be obtained, but if this opposite magnetic field H - is too large, it will become magnetic due to the magnetic field H + . Something recorded (magnetized) on a recording medium may be demagnetized or demagnetized by this magnetic field H - as the medium moves relative to each other. In order to avoid such inconvenience, it is desirable to select the peak value H - p of the magnetic field H - to be sufficiently smaller than the peak value H + p of the magnetic field H + . And this magnetic field
From experimental results, the ratio of H - and magnetic field H + is
It turns out that it is desirable to select H - p /H + p ≒0.345, and in this way, in order to set H - p /H + p ≒0.345, as shown in equation (2) above, d It was confirmed that the ratio of d/a is required to be 0.06〓d/a. However, if this d/a becomes too large, that is, if the auxiliary magnetic pole 24 retreats from the main magnetic pole 23, the effect of the existence of this auxiliary magnetic pole 24 will be lost, so this d/a will become 5 or less, that is, It is desirable to choose the relationship shown in equation (2).

因みに第19図に示す例のものにあつては、
H- p/H+ p≒0.046で、第20図に示す例のものに
あつてはH- p/H+ p≒0.345つまりHp /Hp
1/3となつている。
Incidentally, in the case of the example shown in Figure 19,
H - p /H + p ≒0.046, and in the case of the example shown in Fig. 20, H - p /H + p ≒0.345, that is, H p - /H p + >
It is 1/3.

尚、補助磁極24の前方に例えば表面層28が
設けられて、その比透磁率μがμ≠1のときは、
距離dは実効距離d/μとして補正されるを要
し、前記(2)′式として与えられる。そして、これ
が妥当であることもすでに確認がなされたところ
である。
Note that when, for example, a surface layer 28 is provided in front of the auxiliary magnetic pole 24 and its relative magnetic permeability μ is μ≠1,
The distance d needs to be corrected as the effective distance d/μ, which is given as the above equation (2)'. The validity of this has already been confirmed.

また、主磁極23と、補助磁極24との各前端
部間の距離cは前記(3)式のように選ばれることが
望ましいが、これは距離cが2b/10未満では、主
磁極23と補助磁極24との間に直接的に向う磁
束が大となり垂直y方向の磁界成分が小さくなり
記録効率が低くなつてくること、更に、距離cが
2bを超えると、磁界分布の立ち下りが緩漫にな
つてくることを認めたことに因る。
Furthermore, it is desirable that the distance c between the front ends of the main magnetic pole 23 and the auxiliary magnetic pole 24 be selected as shown in equation (3) above; however, if the distance c is less than 2b/10, The magnetic flux directly directed between the auxiliary magnetic pole 24 becomes large, the magnetic field component in the vertical y direction becomes small, and the recording efficiency becomes low.
This is due to the fact that it was recognized that when the value exceeds 2b, the fall of the magnetic field distribution becomes more gradual.

上述したように本発明装置によつて磁気記録を
行うと、記録磁界のこれに対する磁気媒体の逃げ
側の立ち下りが急峻とされていることによつて高
周波高密度記録が達成できる。
When magnetic recording is performed using the apparatus of the present invention as described above, high frequency, high density recording can be achieved because the recording magnetic field has a steep fall on the escape side of the magnetic medium.

第21図中曲線51は、第19図に説明した磁
界分布をもつて磁気記録を行つたものの、再生出
力特性を示し、λは記録信号波長である。同図中
曲線52は、第7図に説明した従来の方式による
場合の同様の再生出力特性を測定したもので、何
れの場合も、使用した磁気記録媒体は、磁性層の
厚さδが5μmで、抗磁力Hc(エルステツドo
e)と残留磁束密度Br(ガウスgauss)がほぼ同
等のHc=1200oe、Br=1000gaussで、主磁極と媒
体との間隔、及び再生磁気ヘツドと媒体との間隔
Dpが0.5μmである。尚、この場合、再生磁気ヘ
ツドとしては通常のリング型ヘツドによつた。こ
れら曲線51及び52を比較することによつて明
らかなように本発明によるときは、その高周波・
高密度が従来に比し格段的に向上している。更
に、本発明方式によるときは、主磁極23と、補
助磁極24とが磁気媒体の同一側に配設されるの
で空気浮動型ヘツドとして使用することができ、
特に高透磁率体25を、磁気媒体自体に形成する
ときは、その構成は、より簡潔化される。
A curve 51 in FIG. 21 shows the reproduction output characteristic when magnetic recording was performed with the magnetic field distribution explained in FIG. 19, and λ is the recording signal wavelength. Curve 52 in the same figure is a result of measuring similar reproduction output characteristics when using the conventional method explained in FIG. 7. In both cases, the magnetic recording medium used had a magnetic layer thickness δ of 5 μm. So, the coercive force Hc (Oersted o
e ) and the residual magnetic flux density Br (gauss) are almost the same, Hc = 1200 o e , Br = 1000 gauss, and the distance between the main magnetic pole and the medium, and the distance between the reproduction magnetic head and the medium.
Dp is 0.5 μm. In this case, a normal ring type head was used as the reproducing magnetic head. As is clear from comparing these curves 51 and 52, in accordance with the present invention, the high frequency
The high density has been significantly improved compared to the conventional method. Furthermore, according to the method of the present invention, since the main magnetic pole 23 and the auxiliary magnetic pole 24 are arranged on the same side of the magnetic medium, it can be used as an air floating type head.
In particular, when the high magnetic permeability material 25 is formed on the magnetic medium itself, the structure is simpler.

尚、上述の本発明装置による場合、主磁極23
と、補助磁極24と、高透磁率体25との共働に
よつて高い記録効率が得られているものである。
In addition, in the case of the above-described device of the present invention, the main magnetic pole 23
High recording efficiency is achieved through the cooperation of the auxiliary magnetic pole 24 and the high magnetic permeability material 25.

第22図に示すものは、高透磁率体25を省略
した場合の垂直方向の磁界分布を示すものであ
る。この場合は補助磁極の位置を磁気媒体からは
なしてもH-が大きくこの磁界H-のために磁界H+
によつて媒体に一旦記録されたものが減磁ないし
は消磁されて好ましくない。
What is shown in FIG. 22 shows the vertical magnetic field distribution when the high magnetic permeability body 25 is omitted. In this case, even if the auxiliary magnetic pole is removed from the magnetic medium, H - is large and this magnetic field H - causes the magnetic field H +
This is undesirable because what is once recorded on the medium is demagnetized or demagnetized.

また、高透磁率体25を省略した場合において
は補助磁極24の主磁極23側の端部24Bを切
欠いた構造のものにおいても磁界H-を十分に小
さくすることは出来なかつた。
Furthermore, in the case where the high magnetic permeability body 25 is omitted, the magnetic field H - cannot be made sufficiently small even in a structure in which the end 24B of the auxiliary magnetic pole 24 on the main magnetic pole 23 side is notched.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図ないし第6図は本発明の説明に供する磁
気記録方式の配置構成図、第7図は単極型ヘツド
の模型図、第8図はその磁界分布曲線図、第9図
は本発明装置の一例の基本的構成図、第10図な
いし第12図は夫々本発明装置に用い得る磁気ヘ
ツドの拡大上面図、第13図ないし第17図はそ
の製造方法の一例の各工程の斜視図、第18図は
本発明の説明に供する磁気ヘツドの模型図、第1
9図、第20図及び22図は夫々磁界分布曲線
図、第21図は出力特性曲線図である。 21は磁気記録媒体、23は主磁極、24は補
助磁極、25は対向高透磁率体、26は巻線であ
る。
1 to 6 are layout configuration diagrams of a magnetic recording system used to explain the present invention, FIG. 7 is a model diagram of a unipolar head, FIG. 8 is a magnetic field distribution curve diagram thereof, and FIG. 9 is a diagram of the present invention. A basic configuration diagram of an example of the device, FIGS. 10 to 12 are enlarged top views of a magnetic head that can be used in the device of the present invention, and FIGS. 13 to 17 are perspective views of each step of an example of the manufacturing method. , FIG. 18 is a model diagram of a magnetic head used for explaining the present invention, and FIG.
9, 20 and 22 are magnetic field distribution curve diagrams, respectively, and FIG. 21 is an output characteristic curve diagram. 21 is a magnetic recording medium, 23 is a main magnetic pole, 24 is an auxiliary magnetic pole, 25 is an opposing high permeability body, and 26 is a winding.

Claims (1)

【特許請求の範囲】[Claims] 1 磁気記録媒体の磁性層に対接ないしは近接対
向して配置される主磁極と、該主磁極のこれに対
する上記磁気記録媒体の相対的移行の逃げの側に
隣合つて配置される補助磁極と、上記磁性層を挟
んで上記主磁極及び補助磁極が配置される側とは
反対側において上記主磁極と補助磁極とに差渡つ
て対応する高透磁率体とを具備し、上記補助磁極
は上記磁性層に対し、上記主磁極より磁気的に離
間して配置されると共に、上記補助磁極の上記磁
性層との対向前端面の磁気記録媒体移行方向に沿
つた長さは、上記主磁極の前端面の磁気記録媒体
移行方向に沿つた長さより十分大に選定され、上
記主磁極と上記高透磁率体間の磁界によつて上記
磁性層に垂直磁界による磁気記録を行うようにし
たことを特徴とする磁気記録装置。
1. A main magnetic pole disposed opposite or close to the magnetic layer of a magnetic recording medium, and an auxiliary magnetic pole disposed adjacent to the side of the relative transition of the magnetic recording medium with respect to the main magnetic pole. , a high magnetic permeability body corresponding to the main magnetic pole and the auxiliary magnetic pole is provided on a side opposite to the side on which the main magnetic pole and the auxiliary magnetic pole are disposed with the magnetic layer in between, the auxiliary magnetic pole being The auxiliary magnetic pole is arranged magnetically apart from the main magnetic pole with respect to the magnetic layer, and the length along the magnetic recording medium transfer direction of the front end face facing the magnetic layer is equal to the front end of the main magnetic pole. The length of the magnetic recording medium is selected to be sufficiently larger than the length along the magnetic recording medium transfer direction of the surface, and magnetic recording is performed in the magnetic layer by a perpendicular magnetic field by the magnetic field between the main magnetic pole and the high magnetic permeability material. magnetic recording device.
JP3631577A 1977-03-31 1977-03-31 Magnetic recording system Granted JPS53121608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3631577A JPS53121608A (en) 1977-03-31 1977-03-31 Magnetic recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3631577A JPS53121608A (en) 1977-03-31 1977-03-31 Magnetic recording system

Publications (2)

Publication Number Publication Date
JPS53121608A JPS53121608A (en) 1978-10-24
JPS6226084B2 true JPS6226084B2 (en) 1987-06-06

Family

ID=12466395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3631577A Granted JPS53121608A (en) 1977-03-31 1977-03-31 Magnetic recording system

Country Status (1)

Country Link
JP (1) JPS53121608A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613514A (en) * 1979-07-16 1981-02-09 Olympus Optical Co Ltd Magnetic head
JPS5616932A (en) * 1979-07-18 1981-02-18 Olympus Optical Co Ltd Recording and reproducing head for vertical magnetic recording and manufacture of this recording and reproducing head and recording and reproducing unit using this recording and reproducing head
US4317148A (en) * 1980-01-24 1982-02-23 Sperry Corporation Transducer for perpendicular magnetic recording
JPS5737713A (en) * 1980-08-20 1982-03-02 Seiko Epson Corp Vertical magnetic recording head
JPS57162112A (en) * 1981-03-30 1982-10-05 Nec Corp Magnetic head for vertical magnetic recording and reproduction
JPS5897117A (en) * 1981-12-03 1983-06-09 Nippon Columbia Co Ltd Magnetic head
JPS5898805A (en) * 1981-12-07 1983-06-11 Akai Electric Co Ltd Magnetic recording system
JPS58165733U (en) * 1982-04-28 1983-11-04 ティーディーケイ株式会社 magnetic recording head
JPS5971115A (en) * 1982-10-15 1984-04-21 Hitachi Ltd Thin film head for vertical magnetic recording and reproduction
JPS59178610A (en) * 1983-03-29 1984-10-09 Fujitsu Ltd Thin film head for vertical magnetic recording
JP4244216B2 (en) 2005-04-08 2009-03-25 東海旅客鉄道株式会社 Current collecting boat device

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JPS53121608A (en) 1978-10-24

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