JPS63304420A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS63304420A JPS63304420A JP14025987A JP14025987A JPS63304420A JP S63304420 A JPS63304420 A JP S63304420A JP 14025987 A JP14025987 A JP 14025987A JP 14025987 A JP14025987 A JP 14025987A JP S63304420 A JPS63304420 A JP S63304420A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- magnetic
- window
- superconductor
- recording medium
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 117
- 239000002887 superconductor Substances 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 10
- 239000003302 ferromagnetic material Substances 0.000 abstract description 7
- 230000005415 magnetization Effects 0.000 abstract description 4
- 238000005530 etching Methods 0.000 abstract description 3
- 238000000206 photolithography Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000005469 synchrotron radiation 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
本発明は高密度で、雑音の少ない磁気記録が可能な、磁
気記録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a magnetic recording medium capable of high-density, low-noise magnetic recording.
従来の技術
従来の磁気記録媒体およびその磁気記録方法は、第４図
に示すように、基板１の上に、磁性体などの磁気記録媒
体２が形成されており、磁気ヘッド５を用いて、コイル
６に書込み信号を与えることにより、磁束８を磁気記録
媒体２の中に生ぜしめ、この部分を磁化させて記録を行
うものである。しかしこのような磁気記録方式では、磁
束が磁気記録媒体の中で広がり、そのため隣接する記録
部分は、十分離さないと雑音が生ずるし、またそのため
記録密度の高いものが得られない。また隣接する記録部
分への干渉は、磁気ヘッドからも有り、この部分を小さ
くすることが必要であるが、加工面での制約が有り、磁
気ヘッドの小さいものが得られないことも、記録密度の
向上を妨げている。2. Description of the Related Art In a conventional magnetic recording medium and its magnetic recording method, as shown in FIG. 4, a magnetic recording medium 2 such as a magnetic material is formed on a substrate 1. By applying a write signal to the coil 6, a magnetic flux 8 is generated in the magnetic recording medium 2, and this portion is magnetized to perform recording. However, in such a magnetic recording system, magnetic flux spreads within the magnetic recording medium, and therefore, noise will occur unless adjacent recording portions are spaced sufficiently apart, and high recording density cannot be obtained. In addition, there is interference from the magnetic head to the adjacent recording area, and it is necessary to make this area smaller, but there are constraints on the processing surface, and it is not possible to obtain a small magnetic head, which also increases the recording density. This is hindering the improvement of
記録密度の高い磁気記録方式として、垂直磁化を使った
ものが知られている。第５図は、その代表的方法を示し
たものである。第５図において、１は基板、２は磁気記
録媒体、５は磁気ヘッド、６は磁気へソド５に、信号を
与えるコイル、７は強磁性体である。６に電気信号を与
えることにより、７との間に磁束８が形成され、磁気記
録媒体２の垂直方向に磁化を生じ、記録される。この方
法は第４図の方法に比べ、磁束が面方向から、面に垂直
方向になるため、隣接する磁気記録媒体との干渉が少な
くなり、記録密度の高いものが得られる。A method using perpendicular magnetization is known as a magnetic recording method with high recording density. FIG. 5 shows a typical method. In FIG. 5, 1 is a substrate, 2 is a magnetic recording medium, 5 is a magnetic head, 6 is a coil that provides a signal to the magnetic head 5, and 7 is a ferromagnetic material. By applying an electric signal to 6, a magnetic flux 8 is formed between the magnetic flux 8 and the magnetic recording medium 2, causing magnetization in the perpendicular direction of the magnetic recording medium 2, and recording is performed. In this method, compared to the method shown in FIG. 4, the magnetic flux changes from a plane direction to a direction perpendicular to the plane, so there is less interference with adjacent magnetic recording media, and a high recording density can be obtained.
発明が解決しようとする問題点
しかしこの場合も磁束の拡がりが、磁気ヘッドおよび対
向強磁性体の寸法で制約され、これの微小加工が困難で
あることから、記録密度にはやはり限界がある。Problems to be Solved by the Invention However, in this case as well, the spread of the magnetic flux is limited by the dimensions of the magnetic head and the opposing ferromagnetic body, and since microfabrication of these is difficult, there is still a limit to the recording density.
本発明はかかる点に鑑みなされたもので、磁気ヘッドの
加工寸法に制約されず、ホトリソグラフィーの精度で記
録可能な、高密度で雑音の少ない磁気記録媒体およびそ
の磁気記録方法を提供することを目的としている。The present invention has been made in view of the above, and an object of the present invention is to provide a magnetic recording medium with high density and low noise, which is not limited by the processing dimensions of a magnetic head, and can record with the precision of photolithography, and a magnetic recording method thereof. The purpose is
問題点を解決するための手段
本発明は上記問題点を解決するため、磁気記録媒体の磁
気記録窓周辺部を超電導体で覆い、磁束をこの磁気記録
窓にのみ集中するようにして、磁気記録を行うようにし
たものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention covers the peripheral area of the magnetic recording window of a magnetic recording medium with a superconductor so that the magnetic flux is concentrated only in the magnetic recording window. It was designed to do this.
作用
本発明は、磁気記録媒体の磁気記録窓周辺部が超電導体
で覆われているため、磁束がこの磁気記録窓にのみ集中
し、そのため記録密度は磁気ヘッドの寸法によらず、こ
の磁気記録窓の密度によってきまる。この磁気記録窓は
ホトリソグラフィー技術によって形成できることから微
小化でき、したがって高密度低雑音磁気記録が可罷とな
る。In the present invention, since the periphery of the magnetic recording window of the magnetic recording medium is covered with a superconductor, the magnetic flux is concentrated only in this magnetic recording window, and therefore the recording density is independent of the dimensions of the magnetic head. Depends on the density of the windows. Since this magnetic recording window can be formed by photolithography technology, it can be miniaturized, thus enabling high-density, low-noise magnetic recording.
実施例
以下本発明の一実施例について、図面を用いて説明する
。EXAMPLE An example of the present invention will be described below with reference to the drawings.
（実施例１） 第１図は本発明の一実施例の構造を示したものである。(Example 1) FIG. 1 shows the structure of one embodiment of the present invention.
第１図において、１は基板、２は磁気記録媒体、３は超
電導体、４は超電導体３に設けられた磁気記録窓、５は
磁気ヘッド、６は磁気ヘッド５に電気信号を与えるコイ
ル、７は強磁性体である。いまコイル６に電気信号を与
え、磁気ヘッド５と強磁性体７の間に磁束８を生ずる。In FIG. 1, 1 is a substrate, 2 is a magnetic recording medium, 3 is a superconductor, 4 is a magnetic recording window provided in the superconductor 3, 5 is a magnetic head, 6 is a coil that provides an electric signal to the magnetic head 5, 7 is a ferromagnetic material. An electric signal is now applied to the coil 6 to generate a magnetic flux 8 between the magnetic head 5 and the ferromagnetic material 7.
超電導体３は、超電導状態においては、完全反磁性を示
し、磁束は超電導体の中に侵入できない。そのため磁束
８は、磁気記録窓４のみしか通ることができず、磁気記
録窓部分およびその直下の部分に集中する。その結果磁
気記録媒体２の中に生ずる磁化もその部分に限定される
。したがって、磁気記録密度は、磁気記録窓の大きさお
よびそれに隣接する磁気記録窓までの距離によってきま
る。In the superconducting state, the superconductor 3 exhibits complete diamagnetic properties, and magnetic flux cannot penetrate into the superconductor. Therefore, the magnetic flux 8 can only pass through the magnetic recording window 4, and is concentrated in the magnetic recording window portion and the portion immediately below it. As a result, the magnetization generated in the magnetic recording medium 2 is also limited to that portion. Therefore, the magnetic recording density is determined by the size of the magnetic recording window and the distance to the adjacent magnetic recording window.
磁気記録窓は、超電導体にレジストマスクを形成し、エ
ツチングする方法、すなわちホトリソグラフィー技術に
より形成することができる。したがって、磁気記録窓の
大きさおよびそれに隣接する磁気記録窓までの距離はホ
トリソグラフィーの精度で加工できる。現在のホトリソ
グラフィー技術を用いれば、２０００人程度まで可能で
あり、さらに電子ビーム、シンクロトロン放射光などヲ
用イれば、それ以下の加工精度も得られる。したがって
、従来の磁気記録よりも、大幅に記録密度を上げること
ができる。The magnetic recording window can be formed by forming a resist mask on the superconductor and etching it, that is, by photolithography. Therefore, the size of the magnetic recording window and the distance to the adjacent magnetic recording window can be processed with the precision of photolithography. Using current photolithography technology, it is possible to process up to about 2,000 people, and if you use electron beams, synchrotron radiation, etc., it is possible to obtain processing accuracy even lower than that. Therefore, the recording density can be significantly increased compared to conventional magnetic recording.
（実施例２）
第２図は、本発明の他の一実施例の構造を示したもので
ある。第２図において、１は基板、２は磁気記録媒体、
３は超電導体、４は超電導体３に設けられた磁気記録窓
、５は磁気ヘッド、６は磁気ヘッド５に電気信号を与え
るコイル、７は強磁性体である。いまコイル６に電気信
号を与え、磁気ヘッド５と強磁性体７の間に磁束８を生
ずる。(Embodiment 2) FIG. 2 shows the structure of another embodiment of the present invention. In FIG. 2, 1 is a substrate, 2 is a magnetic recording medium,
3 is a superconductor, 4 is a magnetic recording window provided in the superconductor 3, 5 is a magnetic head, 6 is a coil that provides an electric signal to the magnetic head 5, and 7 is a ferromagnetic material. An electric signal is now applied to the coil 6 to generate a magnetic flux 8 between the magnetic head 5 and the ferromagnetic material 7.
゛ したがって、磁束８は磁気記録窓およびその直上に
集中し、実施例１と同様の効果が得られる。゛ Therefore, the magnetic flux 8 is concentrated on the magnetic recording window and directly above it, and the same effect as in the first embodiment can be obtained.
（実施例３）゛
第３図は、本発明の他の一実施例の構造を示したもので
ある。第３図において、１は基板、２は磁気記録媒体、
３は超電導体、４は超電導体３に設けられたるｎ気記録
窓、５は磁気ヘッド、６は磁気ヘッド５に電気信号を与
えるコイルである。いまコイル６に電気信号を与えると
、磁気ヘッド５により磁束８を生ずる。磁束８が超電導
体３に侵入できるのは、磁気記録窓およびその直下の部
分のみである。したがって、磁気記録を、磁気記録窓部
分の部分にのみ行うことができ、記録密度の向上が図れ
る。(Embodiment 3) Fig. 3 shows the structure of another embodiment of the present invention. In FIG. 3, 1 is a substrate, 2 is a magnetic recording medium,
3 is a superconductor, 4 is an n-air recording window provided in the superconductor 3, 5 is a magnetic head, and 6 is a coil that provides an electric signal to the magnetic head 5. When an electric signal is now applied to the coil 6, a magnetic flux 8 is generated by the magnetic head 5. The magnetic flux 8 can enter the superconductor 3 only through the magnetic recording window and the portion immediately below it. Therefore, magnetic recording can be performed only in the magnetic recording window portion, and the recording density can be improved.
以上述べた如く、本発明の方法によれば、磁気記録媒体
の磁気記録窓周辺部が超電導体で覆われているため、磁
束がこの磁気記録窓にのみ集中し、そのため記録密度は
磁気ヘッドの寸法によらず、この磁気記録窓の密度によ
ってきまる。この磁気記録窓はホトリソグラフィー技術
によって形成できることから微小化できる。また隣接磁
気記録部分の間の磁気記録媒体部分には、上または下に
超電導体があるため、磁束が漏れて侵入することがない
。そのため隣接記録部分の干渉を受けることがな（、雑
音の極めて少ないものが得られる。したがって高密度低
雑音磁気記録が可能となる。As described above, according to the method of the present invention, since the periphery of the magnetic recording window of the magnetic recording medium is covered with a superconductor, the magnetic flux is concentrated only in this magnetic recording window, and therefore the recording density is lower than that of the magnetic head. It is determined by the density of this magnetic recording window, regardless of its dimensions. Since this magnetic recording window can be formed by photolithography technology, it can be miniaturized. Further, since there is a superconductor above or below the magnetic recording medium portion between adjacent magnetic recording portions, magnetic flux does not leak and enter. Therefore, there is no interference from adjacent recording portions (and extremely low noise can be obtained. Therefore, high-density, low-noise magnetic recording is possible.
本実施例の構造は、例えば実施例２であれば、サファイ
アなどの耐熱性基板にＹ−Ｂａ−Ｃｕ−０などの酸化物
超電導体膜をスパッタリングにより形成し、ホトリソグ
ラフィーとエツチングにより、磁気記録窓を形成し、そ
の上に酸化鉄などの磁性体を入れたペーストを塗布し、
焼き付けることなどによって、容易に得られる。In the structure of this example, for example, in Example 2, an oxide superconductor film such as Y-Ba-Cu-0 is formed on a heat-resistant substrate such as sapphire by sputtering, and magnetic recording is performed by photolithography and etching. A window is formed and a paste containing magnetic material such as iron oxide is applied on top of it.
It can be easily obtained by baking.
発明の効果
以上述べた如く、本発明は、磁気記録媒体の磁気記録窓
周辺を、超電導体で覆う構造とし、この磁気記録窓を通
して、磁気記録を行うことにより、高密度で、雑音の少
ない磁気記録媒体を得ることができるものである。Effects of the Invention As described above, the present invention provides a structure in which the periphery of the magnetic recording window of a magnetic recording medium is covered with a superconductor, and magnetic recording is performed through the magnetic recording window, thereby achieving high-density, low-noise magnetic recording. A recording medium can be obtained.
第１図〜第３図は本発明の一実施例を示す構造図、第４
図と第５図は従来例の構造図である。
１・・・・・・基板、２・・・・・・磁気記録媒体、３
・・・・・・超電導体、４・・・・・・磁気記録窓、５
・・・・・・磁気ヘッド、６・・・・・・コイル、７・
・・・・・強磁性体、８・・・・・・磁束。
代理人の氏名 弁理士 中尾敏男 はか１名ｃ″′Ｊ（
′Ｙ′）＼Figures 1 to 3 are structural diagrams showing one embodiment of the present invention;
5 and 5 are structural diagrams of a conventional example. 1...Substrate, 2...Magnetic recording medium, 3
...Superconductor, 4...Magnetic recording window, 5
...magnetic head, 6...coil, 7.
...Ferromagnetic material, 8...Magnetic flux. Name of agent: Patent attorney Toshio Nakao
'Y')\
Claims (1)
ことを特徴とする磁気記録媒体。A magnetic recording medium characterized in that a peripheral portion of a magnetic recording window of the magnetic recording medium is covered with a superconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14025987A JPS63304420A (en) | 1987-06-04 | 1987-06-04 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14025987A JPS63304420A (en) | 1987-06-04 | 1987-06-04 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63304420A true JPS63304420A (en) | 1988-12-12 |
Family
ID=15264622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14025987A Pending JPS63304420A (en) | 1987-06-04 | 1987-06-04 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63304420A (en) |
-
1987
- 1987-06-04 JP JP14025987A patent/JPS63304420A/en active Pending
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