JPS62114142A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS62114142A JPS62114142A JP25406385A JP25406385A JPS62114142A JP S62114142 A JPS62114142 A JP S62114142A JP 25406385 A JP25406385 A JP 25406385A JP 25406385 A JP25406385 A JP 25406385A JP S62114142 A JPS62114142 A JP S62114142A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- medium
- information
- magnetic
- magneto
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
- G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気ディスク装置等において用いられる磁気
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 used in a magnetic disk device or the like.
従来の磁気記録媒体の構成を第５図、第６図に示す。 The structure of a conventional magnetic recording medium is shown in FIGS. 5 and 6.
第５図は長手記録用の磁気記録媒体の代表例であり、図
中１はアルミ等の非磁性基板、２はＮ１−Ｐ、Ｎ１−Ｃ
ｕ−Ｐ、Ａｌ１２０３＋ ＳｉＯ２等の非磁性下地硬
化層、３は磁化方向が媒体面に平行な向きとなるＮ−Ｆ
ｅ２Ｏ３、Ｃｏ Ｐ。Figure 5 shows a typical example of a magnetic recording medium for longitudinal recording, in which 1 is a non-magnetic substrate such as aluminum, 2 is N1-P, N1-C
u-P, non-magnetic base hardened layer such as Al1203+SiO2, 3 is N-F whose magnetization direction is parallel to the medium surface
e2O3, CoP.
Ｃｏ−Ｎ１−Ｐ、Ｃｏ−Ｃｒ等の長手記録媒体、４は８
１０２等の保護膜、５は潤滑膜である。なお、、保護膜
４は耐食性を目的に設けられるものであり、従って、長
手記録媒体３がＮ−ｐ’ｅ２０３のような酸化物系の場
合にはなくてもよい。Longitudinal recording medium such as Co-N1-P, Co-Cr, etc., 4 is 8
102 and the like are protective films, and 5 is a lubricating film. Note that the protective film 4 is provided for the purpose of corrosion resistance, and therefore may not be provided when the longitudinal recording medium 3 is an oxide-based material such as N-p'e203.
一方、第６図は、光磁気記録用の磁気記録媒体の代表例
であり、第５図に示すものと異なるのは、長手記録媒体
３のかわりに、６で示す’ｌ’ ｂ−Ｆ ｅ ＊Ｇ ｄ
−Ｃｏ 、 Ｔ ｂ −Ｆ ｅ −Ｃｏ等の磁化方向
が媒体面に垂直となりカー効果やファラデー効果等の磁
気光学効果を示す光磁気記録媒体が設けられている。On the other hand, FIG. 6 shows a typical example of a magnetic recording medium for magneto-optical recording, and the difference from that shown in FIG. 5 is that instead of the longitudinal recording medium 3, 'l' b-F e *Gd
Magneto-optical recording media, such as -Co, Tb-Fe-Co, etc., are provided in which the magnetization direction is perpendicular to the medium surface and exhibits magneto-optical effects such as the Kerr effect and the Faraday effect.
以上のような構成の磁気記録媒体を実際に磁気ディスク
装置等にて使用する場合には、１枚の両面あるいは複数
枚を一定間隔で重ねて形成される複数面の内、１面金部
、あるいは各面の一部を磁、気ヘッドの位置決めに必要
となる位置決めサーボトラック用として使用している。When a magnetic recording medium having the above configuration is actually used in a magnetic disk device or the like, one of the surfaces formed by both sides of one sheet or multiple sheets stacked at regular intervals, the metal part on one side, Alternatively, a portion of each surface is used as a positioning servo track necessary for positioning the magnetic head.
従来の磁気記録媒体は以上のように構成され、サーボ用
に使用した箇所は、サーボ用信号パターンが記録されて
本来のデータの書込み及び読出しに使用できない領域と
なるので実際の記録可能面積が減少してしまうという問
題点があった。Conventional magnetic recording media are configured as described above, and the area used for servo is where the servo signal pattern is recorded and becomes an area that cannot be used for writing or reading original data, reducing the actual recordable area. There was a problem with this.
本発明は上記のような問題点を解消するためになされた
もので、１つの面からサーボ用信号を読出しながら同じ
面、あるいはトラック位置にデータの書込み、読出しを
可能とする磁気記録媒体を得ることを目的とする。The present invention has been made to solve the above-mentioned problems, and provides a magnetic recording medium that allows data to be written and read on the same surface or track position while reading servo signals from one surface. The purpose is to
〔問題点を解決するための手段〕
本発明に係る磁気記録媒体は、非磁性基板上の磁性膜を
、下層に形成された磁気光学効果を有する光磁気記録媒
体と、上層に形成された保磁力が上記光磁気記録媒体よ
りも小さい長手記録媒体とから構成したものである。[Means for Solving the Problems] The magnetic recording medium according to the present invention combines a magnetic film on a non-magnetic substrate with a magneto-optical recording medium having a magneto-optic effect formed as a lower layer and a magnetic recording medium formed as an upper layer. A longitudinal recording medium whose magnetic force is smaller than that of the magneto-optical recording medium.
本発明における磁気記録媒体においては、磁気記録され
たサーボ情報の読出しは、レーザー光等の入射光に対し
、反射光、あるいは透過光の偏光面が回転する光磁気記
録媒体の磁気光学効果（カー効果、あるいはファラデー
効果）を利用し、磁気記録されたデータ情報の書込み、
読出しは従来の磁気ディスク装置と同様、長手記録媒体
に対して磁気ヘッドにより行う。In the magnetic recording medium of the present invention, the reading of magnetically recorded servo information is carried out by the magneto-optic effect (curve effect) of the magneto-optical recording medium in which the plane of polarization of reflected light or transmitted light rotates with respect to incident light such as laser light. or Faraday effect) to write magnetically recorded data information,
Reading is performed on the longitudinal recording medium using a magnetic head, similar to conventional magnetic disk drives.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は、アルミ等の不透明な非磁性基板】ａを用いた
実施例の構成を示す図で、上記非磁性基板ｌａ上に非磁
性下地硬化層２を介して、下層側に成膜された光磁気記
録媒体６と上層側に成膜された長手記録媒体３とから成
る磁性膜７が形成され、更にその上に保護膜４と潤漕膜
５が成膜されて構成されている。上記長手記録媒体３と
光磁気記録媒体６は第′５図及び第６図従来例に示した
ものと同様なものである。ただし、光磁気記録媒体６に
は保磁力力月、’５ＫＯｅ以上のものを、又長手、記録
媒体３には保磁力が上記より小さい１．２ＫＯｅ以下の
ものを用いている。FIG. 1 is a diagram showing the structure of an embodiment using an opaque non-magnetic substrate [a] made of aluminum or the like, in which a film is formed on the lower layer side of the non-magnetic substrate la with a non-magnetic base hardening layer 2 interposed therebetween. A magnetic film 7 consisting of a magneto-optical recording medium 6 and a longitudinal recording medium 3 formed on the upper layer side is formed, and a protective film 4 and a damping film 5 are further formed thereon. The longitudinal recording medium 3 and the magneto-optical recording medium 6 are similar to those shown in the conventional examples of FIGS. 5 and 6. However, the magneto-optical recording medium 6 has a coercive force of 5 KOe or more, and the longitudinal recording medium 3 has a coercive force of 1.2 KOe or less, which is smaller than the above.
一方、第２図は、ガラス゛、アクリル樹脂等の透明な非
磁性基板１ｂを用いた他の実施例の構成を示す図で、第
１図に示した実施例と異なる点は非磁性下地硬化層２が
除かれていることと、第１図に示すものは不透明な基板
１ａを使用し千反射光を利用する為、該基板１ａの両面
に磁性１）１ｉ７を形成しても可であるが、第２図に余
すものは透明な基板１ｂを使用して透過光を利用する為
、該基板１ｂの片面にのみ磁性膜７を形成子る点である
。On the other hand, FIG. 2 is a diagram showing the structure of another embodiment using a transparent nonmagnetic substrate 1b made of glass, acrylic resin, etc. The difference from the embodiment shown in FIG. 2 is removed, and since the one shown in FIG. 1 uses an opaque substrate 1a and utilizes reflected light, it is possible to form magnetic 1) 1i7 on both sides of the substrate 1a. What is left in FIG. 2 is that since a transparent substrate 1b is used and transmitted light is utilized, the magnetic film 7 is formed only on one side of the substrate 1b.
以上のよ□うに構成された磁気記録媒体の使用法ヒ動作
状況を以下に説明する。The usage and operating conditions of the magnetic recording medium constructed as described above will be described below.
本発明の要点は下層に光磁気記録媒体、上層に上記より
保磁力の小さい長手記録媒体を成膜する点にあり、この
媒体を使用する磁気ディスク装置は、前記第１図、第２
図に示す各実施例に対応し゛て夫々第３図、第４図に示
すようになり、各実施例の媒体から成る円板８ａ、８ｂ
の両面又は片面に対向する如（配置された磁気ヘッド９
以外に、サーボ情報読出しのための、全反射ミラー１０
゜ハーフミラ−１），ポラライザ１２．アナライザ１３
、光源１４及び受光素子（ホトダイオード）１５等から
成る光回路が付加されている。The key point of the present invention is to form a magneto-optical recording medium in the lower layer and a longitudinal recording medium having a smaller coercive force than the above in the upper layer.A magnetic disk device using this medium is shown in FIGS.
The disks 8a and 8b made of the medium of each embodiment are as shown in FIGS. 3 and 4, respectively, corresponding to the embodiments shown in the figures.
The magnetic head 9 is arranged so as to face both sides or one side of the
In addition, there is a total reflection mirror 10 for reading servo information.
゜Half mirror 1), polarizer 12. Analyzer 13
, an optical circuit consisting of a light source 14, a light receiving element (photodiode) 15, etc. is added.
どのサーボ情報書込みの方法は、まず、装置に付いてい
る磁気ヘッド９で長手記録媒体゛３にサーボ情報を書込
む。この状態で上面からフラッシュ光等の強い光をあて
、光磁気記録媒体６の保磁力が０近くになる温度（キュ
リ一点）となるようにする。こうすると、長手記録媒体
３に書かれていた情報は、光磁気記録媒体６に転写され
□る。ディスク装置における磁気ヘッド９のサーボ動作
には、この光磁気記録媒体６に転写された情報を、光源
１４からのレーザー光等の入射光に対し、その反射光、
あるいは透過光の偏光面が回転する磁気光学効果（カー
効果、あるいはファラデー効果）を利用することにより
読出して用いる。この情報は、該光磁気記録媒体６がキ
ュリ一点以上に加熱されない限り、長手記録媒体３に書
かれたデータ情報により乱されることなく使用できる。In which servo information writing method, servo information is first written onto the longitudinal recording medium 3 using the magnetic head 9 attached to the device. In this state, a strong light such as a flash light is applied from the top surface to bring the coercive force of the magneto-optical recording medium 6 to a temperature close to 0 (one Curie point). In this way, the information written on the longitudinal recording medium 3 is transferred to the magneto-optical recording medium 6. In the servo operation of the magnetic head 9 in the disk device, the information transferred to the magneto-optical recording medium 6 is transmitted to the incident light such as a laser beam from the light source 14, and its reflected light,
Alternatively, it is read out and used by utilizing the magneto-optical effect (Kerr effect or Faraday effect) in which the polarization plane of transmitted light is rotated. This information can be used without being disturbed by the data information written on the longitudinal recording medium 3, as long as the magneto-optical recording medium 6 is not heated above the Curie point.
即ち、光磁気記録媒体６にサーボ情報を保存したまま、
し手記録媒体３は自由に磁気ヘッド９による情報の書込
み、読出しができることとなる。That is, while the servo information is stored in the magneto-optical recording medium 6,
Information can be freely written to and read from the recording medium 3 by the magnetic head 9.
以上述べたようにこの実施例によれば、磁気記録媒体の
同一面、同一箇所に長手記録による情報と光磁気記録に
よる情報の２種の情報を記録することができる。これは
光磁気記録媒体にサーボ情報を書込み、読出しする場合
に限らず、光回路のレーザー光強度を増し、キュリ一点
以上への加熱が連続的に可能なようにすれば、光磁気記
録媒体６への長手記録媒体３の情報の転写による書込み
が自由になり、データ面を２重にもつ媒体としての使用
も可能である。As described above, according to this embodiment, two types of information can be recorded on the same surface and at the same location of the magnetic recording medium: information by longitudinal recording and information by magneto-optical recording. This is not limited to writing and reading servo information to and from magneto-optical recording media; if the intensity of the laser beam in the optical circuit is increased to enable continuous heating to more than one Curie point, magneto-optical recording media 6 Information can be freely transferred to and written on the longitudinal recording medium 3, and it can also be used as a medium with dual data surfaces.
以上のように、本発明によれば、非磁性基板上の磁性膜
を、下層に形成された磁気光学効果を有する光磁気記録
媒体と、上層に形成された保磁力が上記光磁気記録媒体
よりも小さい長手記録媒体とから構成したことにより、
同一面、同一箇所に異なった方式により２種の情報を記
録することができるので、サーボ用信号等により実際の
記録可能面積が減少することのない磁気記録媒体が得ら
れるという効果がある。As described above, according to the present invention, a magnetic film on a non-magnetic substrate is connected to a magneto-optical recording medium having a magneto-optic effect formed in a lower layer, and a coercive force formed in an upper layer is greater than that of the magneto-optical recording medium. By being composed of a small longitudinal recording medium,
Since two types of information can be recorded on the same surface and at the same location using different methods, it is possible to obtain a magnetic recording medium in which the actual recordable area is not reduced by servo signals or the like.
第１図、第２図は本発明の各実施例の構成を示す断面図
、第３図、第４図は上記第１図、第２図に示す磁気記録
媒体を使用時の装置構成を示す概略図、第５図、第６図
は夫々従来例の構成を示す断面図である。
ｌａ、ｌｂ・・・・・・非磁性基板、３・・・・・・長
手記録媒体、６・・・・・・光磁気記録媒体、７・・・
・・・磁性膜。
なお、図中同一符号は同−又は相当部分を示す。
代理人 大音 増雄（ほか２名）
箋 １記 寄 ２図
−ど峙−
涜 ４巨
第 ５頂
笑 ６洒
昭和 年 月 日
１・事件の表示 特願昭６０−２５４０６３号２、
発明の名称
ｊ圓罎眺
３、補正をする者
事件との関係 特許出願人
住 所 東京都千代田区丸の内二丁目２番３号名
称 （６０１）三菱電機株式会社代表者志岐守哉
４、代理人
住 所 東京都千代田区丸の内二丁目２番３号５
、補正の対象
発明の詳細な説明の欄。
６、補正の内容
（１）明細書第２頁第８行目、第１２行目ｒＮ−Ｆｌ［
１２０１Ｊとあるのをｒｒ Ｆｅ２０ｉＪと補正する
。
以上1 and 2 are cross-sectional views showing the configuration of each embodiment of the present invention, and FIGS. 3 and 4 show the device configuration when using the magnetic recording medium shown in FIGS. 1 and 2 above. The schematic diagram, FIG. 5, and FIG. 6 are sectional views showing the configuration of a conventional example, respectively. la, lb...Nonmagnetic substrate, 3...Longitudinal recording medium, 6...Magneto-optical recording medium, 7...
...magnetic film. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Masuo Ono (and 2 others) Notes: 1, 2, 2, 4, 5, 5, 6, Showa year, month, day, 1, incident display, patent application No. 254063, 1986, 2,
Name of the invention: Enkeisho 3, Relationship with the person making the amendment Patent applicant address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4, Agent Address 2-2-3-5 Marunouchi, Chiyoda-ku, Tokyo
, a column for detailed explanation of the invention subject to amendment. 6. Contents of amendment (1) Page 2 of the specification, lines 8 and 12 rN-Fl [
1201J is corrected to rr Fe20iJ. that's all
Claims (3)
体において、上記磁性膜を、下層に形成された磁気光学
効果を有する光磁気記録媒体と、上層に形成された保磁
力が上記光磁気記録媒体よりも小さい長手記録媒体とか
ら構成したことを特徴とする磁気記録媒体。(1) In a magnetic recording medium formed by forming a magnetic film on a non-magnetic substrate, the magnetic film is combined with a magneto-optical recording medium having a magneto-optic effect formed in a lower layer and a coercive force formed in an upper layer having a 1. A magnetic recording medium comprising a longitudinal recording medium smaller than a magneto-optical recording medium.
とを特徴とする特許請求の範囲第１項記載の磁気記録媒
体。(2) The magnetic recording medium according to claim 1, wherein the nonmagnetic substrate is made of an opaque material such as aluminum.
を特徴とする特許請求の範囲第１項記載の磁気記録媒体
。(3) The magnetic recording medium according to claim 1, wherein the nonmagnetic substrate is made of a transparent material such as glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25406385A JPH0754592B2 (en) | 1985-11-13 | 1985-11-13 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25406385A JPH0754592B2 (en) | 1985-11-13 | 1985-11-13 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62114142A true JPS62114142A (en) | 1987-05-25 |
| JPH0754592B2 JPH0754592B2 (en) | 1995-06-07 |
Family
ID=17259705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25406385A Expired - Lifetime JPH0754592B2 (en) | 1985-11-13 | 1985-11-13 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754592B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01223649A (en) * | 1988-03-02 | 1989-09-06 | Hitachi Ltd | Magneto-optical disk carrier and its manufacture |
| JPH0237546A (en) * | 1988-07-27 | 1990-02-07 | Matsushita Electric Ind Co Ltd | Magneto-optical disk and magneto-optical disk recording method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411500A4 (en) * | 2001-06-28 | 2007-04-04 | Fujitsu Ltd | Method and apparatus of magnetic recording and magnetic recording medium for use therein |
-
1985
- 1985-11-13 JP JP25406385A patent/JPH0754592B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01223649A (en) * | 1988-03-02 | 1989-09-06 | Hitachi Ltd | Magneto-optical disk carrier and its manufacture |
| JPH0237546A (en) * | 1988-07-27 | 1990-02-07 | Matsushita Electric Ind Co Ltd | Magneto-optical disk and magneto-optical disk recording method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754592B2 (en) | 1995-06-07 |
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