JPH034961B2 - - Google Patents
Info
- Publication number
- JPH034961B2 JPH034961B2 JP2021583A JP2021583A JPH034961B2 JP H034961 B2 JPH034961 B2 JP H034961B2 JP 2021583 A JP2021583 A JP 2021583A JP 2021583 A JP2021583 A JP 2021583A JP H034961 B2 JPH034961 B2 JP H034961B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- perpendicular magnetization
- linear portion
- magnetic
- thin 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.)
- Expired
Links
- 230000005415 magnetization Effects 0.000 claims description 28
- 230000035699 permeability Effects 0.000 claims description 15
- 239000010409 thin film Substances 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000992 sputter etching 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)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、高密度記録に適する垂直磁化記録用
ヘツドに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a perpendicular magnetization recording head suitable for high-density recording.
従来例の構成とその問題点
第１図は従来の垂直磁化記録用ヘツドの側面図
であり、垂直異方向性を示す磁化層１を表面に形
成した垂直磁化記録媒体２に近接して、高透磁率
薄膜３を非磁性体４で挾み込んだ磁極５を設け、
この磁極５を用いて前記垂直磁化記録媒体２に記
録再生を行うものである。この例では前記磁極５
に直接コイルを巻かず補助磁極６にコイル７を巻
き、磁極５と補助磁極６の磁気誘導により、コイ
ル７から電気信号を入出力している。第２図は磁
極５の上面図であり、高透磁率薄膜３の垂直磁化
記録媒体２に近接した直線部分６によつて記録ま
たは再生をする。このため記録のトラツク位置は
直線部分６の位置と一致する。垂直磁化記録媒体
２と磁極５、コイル７などからなる垂直磁化記録
用ヘツドは機械的に相対運動して、トラツク幅
Twで記録および再生するが、機械的精度のため
トラツク位置の誤差を生ずる。第３図ａは垂直磁
化記録媒体表面２の磁化層１に書込まれた第１の
記録領域９と第２の記録領域１０を示す平面図で
あり、第３図ｂは磁極５と磁化層１の相対関係を
示す側面図である。第１の記録領域９はトラツク
幅Twで、磁極５のトラツクがＡの位置にある時
に記録した領域であり、その後で機械的誤差のた
め距離d1だけ位置誤差を生じてトラツクがＢの位
置にある時に重ねて書込んだ第２の記録領域が１
０である。この時前の第１の記録領域９の残りの
記録領域１１は再生する時に新しい第２の記録領
域１０からの信号と混つてＳ／Ｎを悪化させる。Structure of a conventional example and its problems Figure 1 is a side view of a conventional perpendicular magnetization recording head. A magnetic pole 5 is provided in which a magnetic permeability thin film 3 is sandwiched between non-magnetic materials 4,
This magnetic pole 5 is used to perform recording and reproduction on the perpendicular magnetization recording medium 2. In this example, the magnetic pole 5
The coil 7 is wound around the auxiliary magnetic pole 6 instead of being directly wound around the auxiliary magnetic pole 6, and electrical signals are input and output from the coil 7 through magnetic induction between the magnetic pole 5 and the auxiliary magnetic pole 6. FIG. 2 is a top view of the magnetic pole 5, in which recording or reproduction is performed using the linear portion 6 of the high magnetic permeability thin film 3 close to the perpendicular magnetization recording medium 2. Therefore, the recording track position coincides with the position of the straight line portion 6. A perpendicular magnetization recording head consisting of a perpendicular magnetization recording medium 2, a magnetic pole 5, a coil 7, etc. moves relative to each other mechanically to adjust the track width.
Recording and playback are performed in Tw, but errors in track position occur due to mechanical precision. FIG. 3a is a plan view showing the first recording area 9 and second recording area 10 written in the magnetic layer 1 on the surface 2 of the perpendicular magnetic recording medium, and FIG. 3b is a plan view showing the magnetic pole 5 and the magnetic layer 1. FIG. 1 is a side view showing the relative relationship between the two. The first recording area 9 has a track width Tw, and is an area recorded when the track of the magnetic pole 5 is at position A. After that, due to a mechanical error, a position error occurs by a distance d1 , and the track is at position B. The second recording area written over and over again when the
It is 0. At this time, the remaining recording area 11 of the previous first recording area 9 is mixed with the signal from the new second recording area 10 during reproduction, thereby worsening the S/N.
い 前記のＳ／Ｎを悪化させる問題点はトラツク
幅Twおよびトラツク間距離が狭くなるほど大き
な問題であり、トラツク幅およびトラツク間距離
を狭めて高密度化する際の障害となる。The aforementioned problem of deteriorating the S/N becomes more serious as the track width Tw and the distance between tracks become narrower, and becomes an obstacle when increasing the density by narrowing the track width and the distance between tracks.
発明の目的
本発明は、以上のような従来の問題点を解決す
るためになされたもので、トラツク位置誤差によ
つてＳ／Ｎの悪化しない垂直磁化記録用ヘツドを
提供することを目的とする。Purpose of the Invention The present invention was made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a perpendicular magnetization recording head in which the S/N ratio does not deteriorate due to track position errors. .
発明の構成
本発明は上記目的を達成するために高透磁率薄
膜を非磁性体で挾み込んだ磁極を有し、前記磁極
の垂直磁化記録媒体に近接する部分において高透
磁率薄膜の断面形状が直線部分と前記直線部分の
両端に接続または近接して設けられた非直線部分
とからなる垂直磁化記録用ヘツドを提供するもの
である。Structure of the Invention In order to achieve the above object, the present invention has a magnetic pole in which a high magnetic permeability thin film is sandwiched between non-magnetic materials, and the cross-sectional shape of the high magnetic permeability thin film in a portion of the magnetic pole adjacent to a perpendicularly magnetized recording medium. The present invention provides a perpendicular magnetization recording head comprising a straight portion and a non-straight portion connected to or adjacent to both ends of the straight portion.
実施例の説明 以下本発明の実施例を説明する。Description of examples Examples of the present invention will be described below.
第４図ａは本発明の一実施例の高透磁率薄膜３
を非磁性体４で挾み込んだ磁極５の上面図であ
る。ただし補助磁極６、コイル７等の構成は従来
例と同じであるので省略してある。高透磁率薄膜
３の垂直磁化記録媒体に近接した長さTwの直線
部分６の両端に長さTeの非直線部分１２を形成
してある。第４図ｂはａの要部１３の拡大図で凹
凸部２２を有する非直線部分１２のうねり幅（凹
凸幅）ｌは磁化層１に記録される信号の波長λよ
り大きくしてある。このため非直線部分１２で記
録した信号の磁化は記録波長λより大きくうねつ
て記録されているため、たとえトラツク位置に誤
差が生じたとしても直線部分６で再生する事はで
きない。また逆に直線部分６で記録した信号の磁
化も波長λより乱れの大きい非直線部分１２で再
生する事はできない。第５図は本実施例のヘツド
で記録した磁化層１の記録領域を示す図で、従来
例の第３図に対応する。第１の記録領域１４は直
線部分６で記録した記録領域１６と非直線部分１
２で記録した記録領域１７とからなる。第２の記
録領域１５は機械的誤差のため距離d1だけ位置誤
差を生じて重ねて書込んだ領域であり、同様に直
線部分６で記録した記録領域１８と非直線部分１
２で記録した記録領域１９とからなる。位置誤差
距離d1より記録領域１７の幅Teを大きく設定す
ると、第１の記録領域１７の残りの記録領域２０
は非直線部分１２で記録した領域だけとなり、前
に述べたように磁化が波長λより乱れが大きく再
生する事ができない。このため記録領域２０の信
号が記録領域１６からの信号と混つてＳ／Ｎを悪
化させることがない。 FIG. 4a shows a high magnetic permeability thin film 3 according to an embodiment of the present invention.
2 is a top view of a magnetic pole 5 sandwiched between nonmagnetic materials 4. FIG. However, the configurations of the auxiliary magnetic pole 6, coil 7, etc. are the same as in the conventional example, so they are omitted. Non-linear portions 12 of length Te are formed at both ends of a straight portion 6 of length Tw of the high magnetic permeability thin film 3 close to the perpendicular magnetization recording medium. FIG. 4b is an enlarged view of the main part 13 in a, and the undulation width (unevenness width) l of the non-linear portion 12 having the uneven portions 22 is made larger than the wavelength λ of the signal recorded on the magnetic layer 1. For this reason, the magnetization of the signal recorded in the non-linear portion 12 is recorded with an undulation greater than the recording wavelength λ, so even if an error occurs in the track position, it cannot be reproduced in the straight portion 6. Conversely, the magnetization of the signal recorded in the linear portion 6 cannot be reproduced in the non-linear portion 12 where the disturbance is greater than the wavelength λ. FIG. 5 is a diagram showing the recording area of the magnetized layer 1 recorded by the head of this embodiment, and corresponds to FIG. 3 of the conventional example. The first recording area 14 includes a recording area 16 recorded in the linear portion 6 and a non-linear portion 1.
It consists of a recording area 17 recorded in step 2. The second recording area 15 is an area in which a positional error of a distance d 1 occurs due to a mechanical error and is written in an overlapping manner.
2, and a recording area 19 recorded in step 2. When the width Te of the recording area 17 is set larger than the positional error distance d 1 , the remaining recording area 20 of the first recording area 17
The only area recorded is the non-linear portion 12, and as mentioned earlier, the magnetization is disturbed more than the wavelength λ and cannot be reproduced. Therefore, the signal from the recording area 20 will not be mixed with the signal from the recording area 16 and the S/N ratio will not deteriorate.
また本実施例の構成のヘツドの磁極５の製造法
の一例を第４図を用いて示す。セラミツク、ガラ
ス等の非磁性体４の片側の一部に第４図ｂに示す
凹凸２２を化学的エツチング、スパツタエツチン
グ、イオンビームエツチング、サンドブラスト法
などにより作る。その上にパーマロイなどの高透
磁率薄膜６を形成して、反対側をもう１方の非磁
性体４で挾み接着する。この時凹凸部２２には接
着剤が入つても良い。以上のように、本製造法は
凹凸を作成する以外の工程は従来と同じであり、
製造上に大きな工程を増加させない長所もある。 Further, an example of a method of manufacturing the magnetic pole 5 of the head having the structure of this embodiment is shown in FIG. The unevenness 22 shown in FIG. 4b is formed on a part of one side of the non-magnetic material 4 such as ceramic or glass by chemical etching, sputter etching, ion beam etching, sandblasting, or the like. A high magnetic permeability thin film 6 such as permalloy is formed thereon, and the opposite side is sandwiched between the other non-magnetic material 4 and bonded. At this time, adhesive may be applied to the uneven portions 22. As mentioned above, this manufacturing method is the same as the conventional process except for creating unevenness.
It also has the advantage of not requiring a large increase in manufacturing steps.
第６図は本発明の第２の実施例を示す要部拡大
図であり、第１の実施例の第４図ｂに対応する部
分である。非磁性体４の一方に溝２３を作り溝中
に凹凸部２２を形成し、さらに高透磁率薄膜３の
直線部分６および非直線部分１２を形成してあ
る。本実施例でも凹凸部２２のうねりｌは記録磁
化の波長λより大きい必要がある。溝２３は接着
剤などが入つてもよいし他の非磁性体で充填して
もよい。本実施列では直線部分６と非直線部分が
分離しているが非直線部分１２は、磁極として働
く範囲に近接してあれば良い。 FIG. 6 is an enlarged view of the main part of the second embodiment of the present invention, and corresponds to FIG. 4b of the first embodiment. A groove 23 is formed in one side of the non-magnetic material 4, an uneven portion 22 is formed in the groove, and a linear portion 6 and a non-linear portion 12 of the high magnetic permeability thin film 3 are further formed. In this embodiment as well, the waviness l of the uneven portion 22 needs to be larger than the wavelength λ of the recorded magnetization. The groove 23 may be filled with an adhesive or other non-magnetic material. In this embodiment, the linear portion 6 and the non-linear portion are separated, but the non-linear portion 12 only needs to be close to the range where it functions as a magnetic pole.
第７図は第３の実施例の要部拡大図で、第１、
第２の実施例と同じ部分は説明を略すが、直線部
分６と非直線部分１２が重なる部分がある。本実
施例では垂直磁化記録媒体を矢印２４の方向に移
動して記録すると直線部分６で記録した後を非直
線部分１２が一部削りながら記録することにな
る。このため、より端部が明確になる効果があ
る。 FIG. 7 is an enlarged view of the main parts of the third embodiment.
The description of the same parts as in the second embodiment will be omitted, but there is a part where the straight part 6 and the non-straight part 12 overlap. In this embodiment, when the perpendicular magnetization recording medium is moved in the direction of the arrow 24 to perform recording, the non-linear portion 12 partially scrapes the area after the linear portion 6 is recorded. This has the effect of making the edges more clear.
第８図は第４の実施例の要部拡大図で、第１の
実施例と同じ部分は説明を略すが、非磁性体４の
上に凹凸部２２を非磁性体の付着により形成す
る。例えば有機物のエポキシ樹脂などを付着させ
て形成する。その上に高透磁率薄膜により直線部
分６と非直線部分１２とを形成し非磁性体４で挾
み込み接着層２５接着剤を入れて接着する。本実
施例は溝を形成する必要がない利点がある。 FIG. 8 is an enlarged view of the main part of the fourth embodiment. Although the description of the same parts as in the first embodiment is omitted, the uneven portion 22 is formed on the nonmagnetic material 4 by adhering the nonmagnetic material. For example, it is formed by attaching an organic epoxy resin or the like. On top of this, a linear portion 6 and a non-linear portion 12 are formed using a high magnetic permeability thin film, and the non-magnetic material 4 is inserted into the adhesive layer 25 and an adhesive is applied thereto to bond them. This embodiment has the advantage that it is not necessary to form a groove.
なお以上の実施例では補助磁極６、コイル７等
は従来の実施例と同じ構成をするとして説明して
来たが、他に磁極５に巻線する方式や補助磁極６
を使用しない方式など多くの変形が垂直磁化記録
ヘツドとして堤案されているが、非磁性体で高透
磁率薄膜を挾み込む磁極を使用する構成ならば本
発明は使用できる。 In the above embodiments, the auxiliary magnetic pole 6, coil 7, etc. have been described as having the same configuration as the conventional embodiment, but there are other ways to wind the magnetic pole 5 and the auxiliary magnetic pole 6.
Although many variations have been proposed for perpendicular magnetization recording heads, such as a system that does not use a perpendicular magnetization recording head, the present invention can be used in any structure that uses magnetic poles that sandwich a thin film of high magnetic permeability made of a nonmagnetic material.
発明の効果
以上説明したように本発明は、垂直磁化記録ま
たは再生する磁極が高透磁率薄膜よりなり、垂直
媒体に近接した部分の断面形状が直線分部とその
両端に非直線部分を形成した構成としたため、機
械的な精度などによるトラツク誤差に原因する
Ｓ／Ｎの悪化を防ぐことができる。特に記録密度
の向上のためトラツク幅を狭める必要が近年多く
なつているが、本発明はトラツク誤差の悪影響を
改善する方法であり、トラツク幅を狭めトラツク
密度の向上に役立つ。Effects of the Invention As explained above, in the present invention, the magnetic pole for perpendicular magnetization recording or reproduction is made of a high magnetic permeability thin film, and the cross-sectional shape of the portion close to the perpendicular medium forms a straight part and non-straight parts at both ends thereof. Because of this configuration, it is possible to prevent deterioration of the S/N ratio caused by track errors due to mechanical precision or the like. Particularly in recent years, there has been an increasing need to narrow track widths to improve recording density, but the present invention is a method for improving the adverse effects of track errors, and is useful for narrowing track widths and improving track density.
第１図は従来の垂直磁化記録用ヘツドの側面
図、第２図は従来の磁極の上面図、第３図ａは従
来の磁化記録領域を示す平面図、第３図ｂは従来
のヘツドと媒体相対関係を示す側面図、第４図ａ
は本発明の第１の実施例における磁極の上面図、
第４図ｂは同要部拡大図、第５図は本発明の磁化
記録領域を示す平面図、第６図は本発明の第２の
実施例の要部拡大図、第７図は本発明の第３の実
施例の要部拡大図、第８図は本発明の第４の実施
例の要部拡大図である。
１……磁化層、２……垂直磁化記録媒体、３…
…高透磁率薄膜、４……非磁性体、５……磁極、
６……直線部分、９，１０，１４，１５，１６，
１７，１８，１９，２０……磁化記録領域、１２
……非直線部分、２２……凹凸部、２３……溝、
２４……移動方向。
Figure 1 is a side view of a conventional perpendicular magnetization recording head, Figure 2 is a top view of a conventional magnetic pole, Figure 3a is a plan view showing a conventional magnetization recording area, and Figure 3b is a diagram showing a conventional head. Side view showing relative relationship between media, Figure 4a
is a top view of the magnetic pole in the first embodiment of the present invention,
FIG. 4b is an enlarged view of the main part, FIG. 5 is a plan view showing the magnetization recording area of the present invention, FIG. 6 is an enlarged view of the main part of the second embodiment of the invention, and FIG. 7 is an enlarged view of the main part of the present invention. FIG. 8 is an enlarged view of the main parts of the third embodiment of the present invention, and FIG. 8 is an enlarged view of the main parts of the fourth embodiment of the present invention. 1... Magnetization layer, 2... Perpendicular magnetization recording medium, 3...
...High magnetic permeability thin film, 4...Nonmagnetic material, 5...Magnetic pole,
6... Straight line part, 9, 10, 14, 15, 16,
17, 18, 19, 20... Magnetization recording area, 12
...Non-straight portion, 22...Irregular portion, 23...Groove,
24...Movement direction.
Claims (1)
備え、前記磁極の垂直磁化記録媒体に近接する端
面における高透磁率薄膜が、直線部分と、前記直
線部分の両端に接続または近接して形成された非
直線部分とからなることを特徴とする垂直磁化記
録用ヘツド。 ２ 非直線部分が、非磁性体の表面に設けられた
凹凸部上に形成された高透磁率薄膜で構成されて
いることを特徴とする特許請求の範囲第１項記載
の垂直磁化記録用ヘツド。 ３ 非直線部分の凹凸幅が垂直磁化記録媒体に記
録された信号の波長より大きいことを特徴とする
特許請求の範囲第１項または第２項記載の垂直磁
化記録用ヘツド。[Scope of Claims] 1. A magnetic pole having a high magnetic permeability thin film sandwiched between non-magnetic materials, wherein the high magnetic permeability thin film on the end face of the magnetic pole near the perpendicular magnetization recording medium has a linear portion and a magnetic pole in the straight portion. 1. A perpendicular magnetization recording head comprising a non-linear portion connected to or adjacent to both ends. 2. The perpendicular magnetization recording head according to claim 1, wherein the non-linear portion is composed of a high magnetic permeability thin film formed on an uneven portion provided on the surface of a non-magnetic material. . 3. The perpendicular magnetization recording head according to claim 1 or 2, wherein the width of the unevenness of the non-linear portion is larger than the wavelength of the signal recorded on the perpendicular magnetization recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58020215A JPS59144016A (en) | 1983-02-08 | 1983-02-08 | Perpendicular magnetization recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58020215A JPS59144016A (en) | 1983-02-08 | 1983-02-08 | Perpendicular magnetization recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59144016A JPS59144016A (en) | 1984-08-17 |
| JPH034961B2 true JPH034961B2 (en) | 1991-01-24 |
Family
ID=12020936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58020215A Granted JPS59144016A (en) | 1983-02-08 | 1983-02-08 | Perpendicular magnetization recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59144016A (en) |
-
1983
- 1983-02-08 JP JP58020215A patent/JPS59144016A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59144016A (en) | 1984-08-17 |
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