JPS61131228A - Vertical magnetic recording medium - Google Patents
Vertical magnetic recording mediumInfo
- Publication number
- JPS61131228A JPS61131228A JP25339284A JP25339284A JPS61131228A JP S61131228 A JPS61131228 A JP S61131228A JP 25339284 A JP25339284 A JP 25339284A JP 25339284 A JP25339284 A JP 25339284A JP S61131228 A JPS61131228 A JP S61131228A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- film
- recording medium
- magnetic recording
- sputtering
- 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
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000004544 sputter deposition Methods 0.000 abstract description 8
- 229910003271 Ni-Fe Inorganic materials 0.000 abstract description 4
- 230000005415 magnetization Effects 0.000 abstract description 3
- 238000010030 laminating Methods 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000010936 titanium Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気ディスク装置、或いは磁気テープ装置等
の磁気記録装置に用いる磁気記録媒体に係り、特に従来
用いられている水平磁気記録媒体に比して記録密度が高
い垂直磁気記録媒体の改良に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic recording medium used in a magnetic recording device such as a magnetic disk device or a magnetic tape device, and particularly relates to a conventionally used horizontal magnetic recording medium. The present invention relates to improvements in perpendicular magnetic recording media that have higher recording densities than those of other media.
基板上に形成された磁性膜の膜面に対して水平方向に磁
化される水平磁気記録媒体に代わって、磁気記録密度の
向」二を図って、磁性膜の膜面に垂直方向に磁化させる
垂直磁気記録媒体が開発されている。Instead of a horizontal magnetic recording medium, which is magnetized horizontally to the surface of a magnetic film formed on a substrate, this media is magnetized perpendicularly to the surface of the magnetic film, aiming for the direction of magnetic recording density. Perpendicular magnetic recording media have been developed.
このような垂直磁気記録媒体の従来の構造について第２
図の磁気ディスク媒体の断面図を用いて説明する。図に
於いて１は非磁性のアルマイト等よりなる基板、２はそ
の上に後の工程で形成される高透磁率磁性体層と基板と
の密着性を高めるためのチタン（Ｔ＋）よりなる非磁性
体層、３はＮ１−Ｆｅ（パーマロイ）よりなる高透磁率
の磁性体層、４はその上に形成される膜面に対し垂直方
向に磁化される磁性体層と前記した高透磁率磁性体層の
間で相互作用が働き、相互の磁性膜の磁気特性の劣化を
防止するためのチタン等よりなる非磁性膜、５は膜面に
垂直方向に磁気異方性を有するＣｏ−Ｃｒよりなる磁性
体層である。The second part about the conventional structure of such perpendicular magnetic recording media.
This will be explained using the cross-sectional view of the magnetic disk medium shown in the figure. In the figure, 1 is a substrate made of nonmagnetic alumite, etc., and 2 is a nonmagnetic material made of titanium (T+) to improve the adhesion between the high permeability magnetic layer and the substrate, which will be formed in a later process. A magnetic layer 3 is a high permeability magnetic layer made of N1-Fe (permalloy), 4 is a magnetic layer magnetized perpendicular to the film surface formed thereon, and the high permeability magnetic layer described above. 5 is a non-magnetic film made of titanium or the like to prevent deterioration of the magnetic properties of mutual magnetic films due to interaction between the magnetic layers, and 5 is made of Co-Cr having magnetic anisotropy in the direction perpendicular to the film surface. This is a magnetic layer.
このように基板上に高透磁率層を形成してその上に膜面
に垂直方向に磁化される磁性体層を形成する理由は、基
板の上に直接垂直磁化記録媒体を形成すると、その上に
磁気ヘッドを所定の間隔を隔てて設置した時、磁気ヘッ
ドからの磁界が、閉構造を取らずに基板の方向に分１ｉ
’ｌ して高記録密度の記録が出来ない為とされている
。The reason why a high permeability layer is formed on a substrate and a magnetic layer magnetized perpendicular to the film surface is formed on top of it is that if a perpendicularly magnetized recording medium is formed directly on the substrate, When magnetic heads are installed at a predetermined interval in
It is said that this is because it is not possible to record at high recording density.
ところで、第２図に示すような垂直磁気記録媒体上に所
定の間隔を隔てて磁気ヘッドを設置し、磁気記録を行な
う場合について、この磁気ヘッドと磁気ディスク」−の
垂直磁化記録媒体との間の距離に対する磁気記録密度の
関係図を第３図に示す。By the way, when magnetic recording is performed by installing magnetic heads at predetermined intervals on a perpendicular magnetic recording medium as shown in FIG. FIG. 3 shows a diagram of the relationship between the magnetic recording density and the distance.
図で横軸は垂直磁気記録媒体とヘッドとの間の距離を示
し、縦軸は垂直磁気記録媒体に記録される磁気記録密度
を示す。曲線１０１に示すように記録媒体とヘッド間の
距離の変位に対して、記録密度が大幅に変位する問題点
がある。In the figure, the horizontal axis indicates the distance between the perpendicular magnetic recording medium and the head, and the vertical axis indicates the magnetic recording density recorded on the perpendicular magnetic recording medium. As shown by a curve 101, there is a problem in that the recording density changes significantly as the distance between the recording medium and the head changes.
このような垂直磁気記録媒体を表面に形成した磁気ディ
スクを用いて磁気記録を行う際、磁気ディスクを回転し
始める時と磁気ディスクの回転を停止する時に、磁気ヘ
ッドが磁気ディスクに接触して磁気記録する、いわゆる
コンタクト・スタート・ストップ方式に於いては、磁気
ヘッドをある程度磁気ディスクの記録媒体表面より隔て
た状態で設置することが、記録媒体の表面に傷を発生さ
せるヘッド・クラッシュ現象を防止する為に必要とされ
ている。When performing magnetic recording using a magnetic disk with such a perpendicular magnetic recording medium formed on its surface, the magnetic head comes into contact with the magnetic disk and generates magnetic waves when the magnetic disk starts rotating and when it stops rotating. In the so-called contact start-stop method of recording, installing the magnetic head a certain distance from the recording medium surface of the magnetic disk prevents the head crash phenomenon that causes scratches on the recording medium surface. is needed to do.
ところでこのように磁気ヘッドと記録媒体間の距離の変
位に対して、大幅に記録密度が変位するような磁気記録
媒体を用いた磁気ディスク装置では、ヘンドクラソシュ
現象を避けるために、ヘッドと記録媒体間の距離をある
程度の値に保とうとすると、それによって記録密度が大
幅に変化する問題がある。By the way, in a magnetic disk drive using a magnetic recording medium in which the recording density changes significantly in response to a change in the distance between the magnetic head and the recording medium, in order to avoid the Hendokrasosh phenomenon, it is necessary to If an attempt is made to maintain the distance at a certain value, there is a problem in that the recording density changes significantly.
然し、水平磁気記録媒体に於いては、第３図の符合１０
２の曲線に示すように記録媒体と磁気ヘッド間の距離の
変動に対して磁気記録密度は余り影響を受けず変位も少
ない。However, in a horizontal magnetic recording medium, the number 10 in FIG.
As shown in curve 2, the magnetic recording density is not affected much by changes in the distance between the recording medium and the magnetic head, and the displacement is small.
本発明は上記した事項に鑑みてなされたもので、本発明
の磁気記録媒体は、基板上に高透磁率磁性体層を形成し
、該高透磁率磁性体層上に非磁性体層を介して膜面に垂
直方向に磁気異方性を有する磁性体層を設けてなる磁気
記録媒体に於いて、前記膜面に対し垂直方向に磁気異方
性を有する磁性体層上に、高透磁率磁性体層を積層形成
したものである。The present invention has been made in view of the above-mentioned matters, and the magnetic recording medium of the present invention includes a high permeability magnetic layer formed on a substrate, and a non-magnetic layer interposed on the high permeability magnetic layer. In a magnetic recording medium in which a magnetic layer having magnetic anisotropy in a direction perpendicular to the film surface is provided, a high magnetic permeability layer is provided on the magnetic layer having magnetic anisotropy in a direction perpendicular to the film surface. It is formed by laminating magnetic layers.
即ち、本発明の垂直磁気記録媒体は、磁気記録密度が大
きいが、ヘッドと記録媒体間の距離で記録密度が影響を
受けやすい垂直磁気記録媒体の上に、記録密度は小さい
が、ヘソ１−″と記録媒体間の距離で記録密度が影響を
受は難い水平磁気記録媒体を形成し、前記垂直磁気記録
媒体内に形成された残留磁化を、前記水平記録媒体を設
けることにより、閉構造に形成して閉じ込めて、ヘッド
と記録媒体間の距離に余り影響がなく、且つ磁気記録密
度の大きい垂直磁気記録媒体を得ようとするものである
。That is, the perpendicular magnetic recording medium of the present invention has a high magnetic recording density, but the recording density is easily affected by the distance between the head and the recording medium, and the perpendicular magnetic recording medium has a small recording density, but the belly button 1- By forming a horizontal magnetic recording medium in which the recording density is hardly affected by the distance between the vertical magnetic recording medium and the recording medium, and by providing the horizontal recording medium, the residual magnetization formed in the vertical magnetic recording medium is reduced to a closed structure. By forming and confining the perpendicular magnetic recording medium, the objective is to obtain a perpendicular magnetic recording medium that has a high magnetic recording density and has little effect on the distance between the head and the recording medium.
以下、図面を用いて本発明の一実施例につき詳細に説明
する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図は本発明の垂直磁気記録媒体の断面図で、図示す
るようにアルマイトより成る基板１１の」二にはスパッ
タ法により厚さが２００人のＴｉ膜１２が被着形成され
ている。更にこの上には、Ｎｉ−Ｆｅ膜１３がスパッタ
法で厚さ０．５μｍで形成されている。またこの上には
、ＴＩ膜膜種４２００人の厚さでスパッタ法により形成
され、この上には垂直磁気記録媒体のＣｏ−Ｃｒ膜１５
がスパッタ法で、０．１５μｍの厚さで形成され、更に
その上にはＮｉ−Ｆｅ膜１６が１００〜５００人の厚さ
にスパッタ法により形成されている。FIG. 1 is a cross-sectional view of the perpendicular magnetic recording medium of the present invention. As shown in the figure, a Ti film 12 having a thickness of 200 mm is deposited on the second side of a substrate 11 made of alumite by sputtering. Furthermore, a Ni--Fe film 13 is formed on this by sputtering to a thickness of 0.5 μm. Further, on this, a TI film with a thickness of 4,200 mm is formed by sputtering, and on this, a Co-Cr film 15 of the perpendicular magnetic recording medium is formed.
is formed by sputtering to a thickness of 0.15 .mu.m, and a Ni--Fe film 16 is further formed thereon to a thickness of 100 to 500 .mu.m by sputtering.
このような記録媒体にすると、その上に設置された磁気
ヘッドに依って、垂直磁気記録媒体のＣｏ−Ｃｒ膜１５
が磁化され、その残留磁化がＧｏ−Ｃｒ膜の上下に積層
形成されている高透磁率のＮｉ−Ｆｅ膜１３．１６に依
って磁気的に結合され、安定に保たれるようになる。そ
のため従来の垂直磁気記録媒体に於けるように磁気ヘッ
ドと記録媒体間で形成される反磁場の発生も少なくなる
。従って、従来の磁気記録媒体に於けるように磁気記録
媒体に磁気ヘッドが近接した時、磁気記録媒体の磁気記
録密度が大幅に変位する現象が除去されるため、磁気記
録密度に対して媒体と磁気ヘッド間の距離の及ぼす影響
力が、従来の磁気記録媒体程大きくない。When such a recording medium is used, the Co--Cr film 15 of the perpendicular magnetic recording medium is
is magnetized, and its residual magnetization is magnetically coupled by the high permeability Ni--Fe films 13 and 16 laminated above and below the Go--Cr film, and is kept stable. Therefore, the occurrence of a demagnetizing field between the magnetic head and the recording medium, which occurs in conventional perpendicular magnetic recording media, is also reduced. Therefore, the phenomenon in which the magnetic recording density of the magnetic recording medium changes significantly when the magnetic head approaches the magnetic recording medium, as in conventional magnetic recording media, is eliminated. The influence of the distance between magnetic heads is not as great as in conventional magnetic recording media.
また、本発明の磁気記録媒体を用いると記録媒体と磁気
ヘッド間の距離を従来の磁気記録媒体を用いて記録する
場合に比して大きく保っても磁気記録密度には余り影響
を及ぼさないので、磁気ヘッドを磁気記録媒体よりある
程度の距離を隔てて磁気記録できる。そのため、磁気ヘ
ッドが記録媒体の表面に衝突して磁気記録媒体の表面を
損傷させるヘッド−クラッシュ現象が大幅に除去でき、
このような磁気記録媒体を用いると、高信頼度の磁気デ
ィスク装置が得られる。Furthermore, when using the magnetic recording medium of the present invention, even if the distance between the recording medium and the magnetic head is kept larger than when recording using conventional magnetic recording media, the magnetic recording density will not be affected much. , magnetic recording can be performed with the magnetic head separated from the magnetic recording medium by a certain distance. Therefore, the head-crash phenomenon in which the magnetic head collides with the surface of the recording medium and damages the surface of the magnetic recording medium can be largely eliminated.
By using such a magnetic recording medium, a highly reliable magnetic disk device can be obtained.
また本発明者等は種々の実験の結果、Ｃｏ−Ｃｒ膜１５
の上に形成するＮｉ−Ｆｅ膜１６は、その」二に設置す
る磁気ヘッドに対して一種の磁束の遮蔽効果を持つこと
に成るため、余り膜厚を厚くすると、磁気ヘッドの出力
が小さく成りすぎるという不都合が生じることを見いだ
し、そのためＮｉ−Ｆｅ膜の厚さは１００〜５００人の
程度に保つのが最適である。Furthermore, as a result of various experiments, the present inventors found that the Co-Cr film 15
The Ni-Fe film 16 formed on top has a kind of magnetic flux shielding effect on the magnetic head installed next to it, so if the film is made too thick, the output of the magnetic head will decrease. It has been found that the thickness of the Ni--Fe film is optimally kept within the range of 100 to 500 layers.
以上述べたように本発明の磁気記録媒体によれば、磁気
ヘッドと磁気記録媒体の距離をある程度隔てて磁気記録
を行っても、磁気記録密度に余り影響を及ぼさない。従
って、本発明の磁気記録媒体を用いて磁気ディスクを形
成すれば、磁気ヘッドと磁気ディスク間の距離をある程
度、大きく保つことができ、ヘッドクラッシュ現象の発
生し難い高信頼度の磁気ディスク装置が得られる効果が
ある。As described above, according to the magnetic recording medium of the present invention, even if magnetic recording is performed with a certain distance between the magnetic head and the magnetic recording medium, the magnetic recording density is not significantly affected. Therefore, if a magnetic disk is formed using the magnetic recording medium of the present invention, the distance between the magnetic head and the magnetic disk can be kept large to a certain extent, and a highly reliable magnetic disk device in which the head crash phenomenon is unlikely to occur can be obtained. There are benefits to be gained.
第１図は本発明の垂直磁気記録媒体の構造を示す断面図
、
第２図は従来の垂直磁気記録媒体の構造を示す断面図、
第３図は記録媒体とヘッド間の距離に対する磁気記録密
度の関係図である。
図に於いて、１１は基板、１２．１４はＴ＋膜、１３．
１６はＮｉ−Ｆｅ膜、１５はＣｏ−Ｃｒ膜を示す。Fig. 1 is a cross-sectional view showing the structure of the perpendicular magnetic recording medium of the present invention, Fig. 2 is a cross-sectional view showing the structure of a conventional perpendicular magnetic recording medium, and Fig. 3 is the magnetic recording density versus the distance between the recording medium and the head. It is a relationship diagram. In the figure, 11 is a substrate, 12.14 is a T+ film, 13.
16 is a Ni--Fe film, and 15 is a Co--Cr film.
Claims (1)
層上に非磁性体層を介して膜面に垂直方向に磁気異方性
を有する磁性体層を設けてなる磁気記録媒体に於いて、
前記膜面に対し垂直方向に磁気異方性を有する磁性体層
上に、高透磁率磁性体層を積層形成したことを特徴とす
る垂直磁気記録媒体。Magnetic recording in which a high permeability magnetic layer is formed on a substrate, and a magnetic layer having magnetic anisotropy perpendicular to the film surface is provided on the high permeability magnetic layer via a nonmagnetic layer. In the media,
A perpendicular magnetic recording medium characterized in that a high magnetic permeability magnetic layer is laminated on the magnetic layer having magnetic anisotropy in a direction perpendicular to the film surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25339284A JPS61131228A (en) | 1984-11-29 | 1984-11-29 | Vertical magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25339284A JPS61131228A (en) | 1984-11-29 | 1984-11-29 | Vertical magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61131228A true JPS61131228A (en) | 1986-06-18 |
Family
ID=17250729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25339284A Pending JPS61131228A (en) | 1984-11-29 | 1984-11-29 | Vertical magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61131228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991126A (en) * | 1991-10-22 | 1999-11-23 | Sony Corporation | Perpendicular magnetic recording and perpendicular magnetic reproducing apparatus |
| JP2005122876A (en) * | 2003-09-26 | 2005-05-12 | Tdk Corp | Magnetic recording medium and device |
-
1984
- 1984-11-29 JP JP25339284A patent/JPS61131228A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991126A (en) * | 1991-10-22 | 1999-11-23 | Sony Corporation | Perpendicular magnetic recording and perpendicular magnetic reproducing apparatus |
| JP2005122876A (en) * | 2003-09-26 | 2005-05-12 | Tdk Corp | Magnetic recording medium and device |
| JP4525249B2 (en) * | 2003-09-26 | 2010-08-18 | Ｔｄｋ株式会社 | Magnetic recording medium and magnetic recording apparatus |
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