JP2556709B2 - Magneto-optical recording device - Google Patents
Magneto-optical recording deviceInfo
- Publication number
- JP2556709B2 JP2556709B2 JP62199605A JP19960587A JP2556709B2 JP 2556709 B2 JP2556709 B2 JP 2556709B2 JP 62199605 A JP62199605 A JP 62199605A JP 19960587 A JP19960587 A JP 19960587A JP 2556709 B2 JP2556709 B2 JP 2556709B2
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- optical recording
- recording medium
- layer
- magnetic
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、光磁気記録媒体と、その媒体に外部磁界
を印加する磁気ヘッドとを備えた光磁気記録装置に関す
るものである。TECHNICAL FIELD The present invention relates to a magneto-optical recording apparatus including a magneto-optical recording medium and a magnetic head for applying an external magnetic field to the medium.
第３図は、従来の光磁気記録媒体Ａに外部磁界を印加
する方法を示す図であり、図においてＡは従来の光磁気
記録媒体を示し、１〜４は光磁気記録媒体の構成要素で
あり、１は透明基板,2は誘電体層,3は磁性層,4は保護層
である。10は外部磁界を印加するための磁石で、例えば
永久磁石，電磁石，磁気ヘッド等である。保護層４の厚
さは0.1μｍ程度であり、保護層４と磁石10との間には
零より大きい距離を有している。この距離の大きさは例
えば片面仕様換言すれば前記基板１の片面のみに前記構
成要素を形成した構造の光磁気記録媒体Ａでは0.2〜10m
m程度である。FIG. 3 is a diagram showing a method of applying an external magnetic field to a conventional magneto-optical recording medium A, in which A is a conventional magneto-optical recording medium and 1-4 are constituent elements of the magneto-optical recording medium. 1 is a transparent substrate, 2 is a dielectric layer, 3 is a magnetic layer, and 4 is a protective layer. Reference numeral 10 is a magnet for applying an external magnetic field, such as a permanent magnet, an electromagnet, or a magnetic head. The thickness of the protective layer 4 is about 0.1 μm, and the distance between the protective layer 4 and the magnet 10 is larger than zero. The size of this distance is, for example, 0.2 to 10 m in a magneto-optical recording medium A having a structure in which the constituent elements are formed only on one surface of the substrate 1, in other words, one surface specification.
It is about m.
上記のように、従来の光磁気記録媒体Ａでは保護層４
の厚さおよび強度が十分でないため磁石10と保護層４と
が接触すると、光磁気記録媒体Ａの保護層４、しいては
磁性層３に著しい損傷を与える。そのため保護層４と磁
石10との距離は光磁気記録媒体Ａの面振れ±0.1mm程度
を上まわる必要があるため最低でも0.2mm程度離す必要
があつた。特に磁石10を磁気ヘツドとした場合には永久
磁石や電磁石に比べて発生する磁気エネルギーが小さく
なるため磁性層３上で信号を記録するに十分な強度の磁
界を発生させることは困難であつた。また、磁石10と磁
性層３との距離は、光磁気記録媒体Ａの面振れにより、
常に±0.1mm程度変動しているため記録信号に乱れを生
じさせる等の問題点があつた。As described above, in the conventional magneto-optical recording medium A, the protective layer 4
If the magnet 10 and the protective layer 4 come into contact with each other due to insufficient thickness and strength, the protective layer 4 and hence the magnetic layer 3 of the magneto-optical recording medium A will be significantly damaged. Therefore, the distance between the protective layer 4 and the magnet 10 needs to exceed the surface deflection of the magneto-optical recording medium A of about ± 0.1 mm, so that the distance must be at least about 0.2 mm. In particular, when the magnet 10 is a magnetic head, it is difficult to generate a magnetic field having a sufficient intensity for recording a signal on the magnetic layer 3 because the generated magnetic energy is smaller than that of a permanent magnet or an electromagnet. . Further, the distance between the magnet 10 and the magnetic layer 3 is determined by the surface wobbling of the magneto-optical recording medium A.
Since it constantly fluctuates by about ± 0.1 mm, there is a problem that the recording signal is disturbed.
この発明はかかる問題点を解決するためになされたも
ので、従来の光磁気記録媒体の保護層４の上に、表面に
潤滑剤を含浸せしめた高分子シートあるいは、表面に潤
滑層を形成した高分子シートを新たに設けることによ
り、さらに、磁石10、特に磁気ヘッドの磁界の発生面を
曲面加工した磁気ヘツド８を外部磁界印加用として用い
ることにより、光磁気記録媒体と磁気ヘツド８とを接触
摺動させることを可能とし、それにより、５〜100μｍ
の範囲の任意の大きさに磁気ヘツド８と磁性層３との距
離を保つことが可能となるため、従来の光磁気記録装置
に比べて磁性層３上での磁界強度が大きくなり、かつ、
光磁気記録媒体の面振れによる記録信号の乱れを無くす
ることを可能たらしめる光磁気記録装置の提供を目的と
する。The present invention has been made to solve the above problems, and a polymer sheet having a surface impregnated with a lubricant or a lubricating layer is formed on the surface of the protective layer 4 of the conventional magneto-optical recording medium. By newly providing a polymer sheet, and further using the magnetic head 8 in which the magnetic field generation surface of the magnetic head is curved for use in applying an external magnetic field, the magneto-optical recording medium and the magnetic head 8 are provided. It is possible to slide in contact, thereby 5-100 μm
Since it is possible to keep the distance between the magnetic head 8 and the magnetic layer 3 to an arbitrary size within the range, the magnetic field strength on the magnetic layer 3 becomes larger than that of the conventional magneto-optical recording device, and
An object of the present invention is to provide a magneto-optical recording device capable of eliminating the disturbance of the recording signal due to the surface fluctuation of the magneto-optical recording medium.
この発明に係る光磁気記録装置は、光磁気記録媒体と
磁気ヘツドとを接触摺動せしめることを特徴とし、これ
を可能たらしめるために、従来の光磁気記録媒体の保護
層上に、潤滑剤を含浸せしめた高分子シートを接着した
光磁気記録媒体、あるいは、従来の光磁気記録媒体の保
護層上に高分子シートを接着し、その後に高分子シート
の表面に潤滑層を形成した光磁気記録媒体を作成した。
また外部磁界印加用の磁気ヘツドの磁界発生面に曲面加
工を施した。The magneto-optical recording device according to the present invention is characterized in that the magneto-optical recording medium and the magnetic head are slid in contact with each other, and in order to make this possible, a lubricant is provided on the protective layer of the conventional magneto-optical recording medium. Magneto-optical recording medium with a polymer sheet impregnated with a polymer or a conventional magneto-optical recording medium with a polymer sheet adhered on the protective layer, and then a lubricant layer is formed on the surface of the polymer sheet. A recording medium was created.
In addition, the magnetic field generation surface of the magnetic head for applying the external magnetic field was curved.
この発明においては、光磁気記録媒体と磁気ヘツドと
が接触摺動することを可能としたため、従来の光磁気記
録媒体と磁界印加磁石との間に距離を有する光磁気記録
装置と比べて、より大きい外部磁界を安定して磁性層に
印加することが可能となる。In the present invention, since the magneto-optical recording medium and the magnetic head can be slid in contact with each other, compared with the conventional magneto-optical recording device having a distance between the magneto-optical recording medium and the magnetic field applying magnet, A large external magnetic field can be stably applied to the magnetic layer.
第１図〜第２図は本発明の一実施例を示す図であり、
第１図は磁気ヘツドと光磁気記録媒体Ｂとの関係を示す
要部断面図、第２図は光磁気記録装置に使用する磁気ヘ
ツドの外形状を示す斜視図である。尚、従来例と同一部
分同一部品には同一符号を付与してある。1 and 2 are diagrams showing an embodiment of the present invention,
FIG. 1 is a sectional view showing the relationship between the magnetic head and the magneto-optical recording medium B, and FIG. 2 is a perspective view showing the outer shape of the magnetic head used in the magneto-optical recording apparatus. The same parts as those of the conventional example are designated by the same reference numerals.
図において、１は従来例と同じ、例えばガラス，アク
リル樹脂などからなる透明基板で、該透明基板１の表面
には、順次誘電体層2,磁性層3,保護層４が形成されてお
り、さらに保護層４に本発明の例えばポリエステルシー
トの表面をポリツシヤー等によつて粗らし、そこに例え
ば脂肪酸を含浸させた高分子シート６が接着層５を介し
て形成されている。８は本発明の光磁気記録装置に用い
る磁気ヘツドでこの磁気ヘツド８（詳しい内部構造につ
いては説明を省略する）は、例えば光磁気記録媒体Ｂと
対向する部分をセラミツクス非磁性フエライト，ガラス
等で形成し、この対向する部分いいかえれば、磁界発生
面を例えば半球状に鏡面加工し、その反対面に、第２図
に示すように支持バネ９を取り付け、適当な圧力で上記
の光磁気記録媒体Ｂ上に接触摺動させる。この時、前記
高分子シートの厚さを50μｍとすると、従来の光磁気記
録装置では、磁性層３と磁気ヘツド８との距離が200μ
ｍであるため、第４図に示すように、磁性膜上の磁界強
度は119/78倍、すなわち約1.5倍となる。また、光磁気
記録媒体Ｂと磁気ヘツド８は常に接触しているため、磁
性層３と磁気ヘツド８との距離は光磁気記録媒体Ｂの面
振れに関係なく常に一定であり、印加磁界は安定して供
給できる。In the figure, reference numeral 1 is the same as the conventional example, for example, a transparent substrate made of glass, acrylic resin or the like, and a dielectric layer 2, a magnetic layer 3, and a protective layer 4 are sequentially formed on the surface of the transparent substrate 1, Further, the surface of the polyester sheet of the present invention, for example, is roughened on the protective layer 4 by a polisher or the like, and a polymer sheet 6 impregnated with, for example, fatty acid is formed on the protective layer 4 via the adhesive layer 5. Reference numeral 8 is a magnetic head used in the magneto-optical recording apparatus of the present invention. This magnetic head 8 (detailed internal structure is omitted) is made of, for example, a ceramic non-magnetic ferrite or glass at a portion facing the magneto-optical recording medium B. In other words, the opposing portions, in other words, the magnetic field generating surface is mirror-finished, for example, in a hemispherical shape, and the supporting spring 9 is attached to the opposite surface as shown in FIG. Touch and slide on B. At this time, if the thickness of the polymer sheet is 50 μm, the distance between the magnetic layer 3 and the magnetic head 8 is 200 μm in the conventional magneto-optical recording device.
Since it is m, the magnetic field strength on the magnetic film is 119/78 times, that is, about 1.5 times, as shown in FIG. Further, since the magneto-optical recording medium B and the magnetic head 8 are always in contact with each other, the distance between the magnetic layer 3 and the magnetic head 8 is always constant regardless of the surface wobbling of the magneto-optical recording medium B, and the applied magnetic field is stable. Can be supplied.
この発明による上記光磁気記録媒体Ｂと磁気ヘツド８
とを用いると、CN比は安定して46dB以上を確保でき、ま
た、２次高調波レベルは安定して−30dB以下を実現でき
ることが実測にて確認できた。また、例えば、ポリエス
テルシートはオーデイオテープやビデオテープ等のベー
ス材として用いられていることからも理解できるように
非常に強固な結合力を持つため、本発明の磁気ヘツド８
を接触摺動させても、光磁気記録媒体Ｂには何ら損傷を
与えないことも各種の実験結果確認されている。本発明
の実施例の説明では、高分子シート６としてポリエステ
ルを示したが、前記高分子シート６の厚さが100μｍ以
下で、十分な強度を持つ物質であれば、例えば、ポリエ
チレン，塩化ビニール等の材料でもよい。また、潤滑層
７として脂肪酸を高分子シートの表面に含浸させること
で説明したが、これも例えば、エステル、植物油等潤滑
性を有すものであれば何れでもよい。さらに、本発明の
実施例では、高分子シート６の表面を粗らして潤滑材を
含浸させることで説明したが高分子シートの表面に安定
に潤滑層を形成することが可能であればスピンコート
法，スプレー法蒸着等何れの方法で形成してもよい。ま
た上記実施例の説明では、磁気ヘツド８の磁界発生面い
いかえれば光磁気記録媒体Ｂとの摺接面を半球面に鏡面
加工したが、光磁気記録媒体Ｂとの接触によつて光磁気
記録媒体Ｂの表面に損傷を与えない形状であれば、例え
ば、放物面，双曲面，あるいはテーパー加工を施したも
の等、何れの形状でもよい。The magneto-optical recording medium B and the magnetic head 8 according to the present invention.
By using and, it was confirmed by actual measurement that the CN ratio can be stably secured at 46 dB or more and the second harmonic level can be stably achieved at −30 dB or less. Further, for example, since the polyester sheet has a very strong binding force as can be understood from the fact that it is used as a base material for audio tapes and video tapes, the magnetic head 8 of the present invention is used.
It has been confirmed by various experimental results that the magneto-optical recording medium B will not be damaged even if it is slid in contact with. In the description of the embodiments of the present invention, polyester is shown as the polymer sheet 6, but if the polymer sheet 6 has a thickness of 100 μm or less and has sufficient strength, for example, polyethylene, vinyl chloride, etc. The material of Also, the description has been made by impregnating the surface of the polymer sheet with fatty acid as the lubricating layer 7, but this may be any one having lubricity such as ester and vegetable oil. Further, in the embodiments of the present invention, the surface of the polymer sheet 6 is roughened and impregnated with the lubricant, but if it is possible to stably form a lubricating layer on the surface of the polymer sheet, spin coating is performed. It may be formed by any method such as a vapor deposition method or a vapor deposition method using a spray method. Further, in the description of the above embodiment, the magnetic field generating surface of the magnetic head 8, in other words, the sliding contact surface with the magneto-optical recording medium B is mirror-finished into a hemispherical surface. As long as the surface of the medium B is not damaged, any shape such as a paraboloidal surface, a hyperboloidal surface, or a tapered shape may be used.
この発明は、以上説明したとおり、従来の光磁気記録
媒体の保護層上に潤滑材を含浸させた高分子シートある
いは表面に潤滑層を形成した高分子シートを形成すると
共に、磁気ヘツドの磁界発生面（上記光磁気記録媒体と
の摺接面）を曲面加工をし、上記光磁気記録媒体と接触
摺動させることを可能としたので磁性層と磁気ヘツドと
の距離を従来の方法に比べて半分以下にし、かつ安定に
保てるため、より大きい外部磁界強度を磁性層に安定し
て印加することが可能となり、その結果、光磁気記録に
おいて安定した記録再生特性を得ることが可能となると
いう効果がある。また、光磁気記録媒体において、磁気
ヘツドとの接触面に、潤滑剤を含浸させた高分子シート
を設けることにより、光磁気記録媒体の記録面への損傷
に対する高い信頼性を得ることが可能となるという効果
がある。As described above, the present invention forms a polymer sheet impregnated with a lubricant or a polymer sheet having a lubricant layer formed on the surface of a protective layer of a conventional magneto-optical recording medium, and generates a magnetic field of a magnetic head. The surface (sliding contact surface with the magneto-optical recording medium) is processed to be curved so that it can be slid in contact with the magneto-optical recording medium. Therefore, the distance between the magnetic layer and the magnetic head is smaller than that of the conventional method. Since it is less than half and can be stably maintained, a larger external magnetic field strength can be stably applied to the magnetic layer, and as a result, stable recording / reproducing characteristics can be obtained in magneto-optical recording. There is. Further, in the magneto-optical recording medium, by providing a polymer sheet impregnated with a lubricant on the contact surface with the magnetic head, it is possible to obtain high reliability against damage to the recording surface of the magneto-optical recording medium. There is an effect that.
第１図及び第２図は本発明の一実施例を示し、第１図は
磁気ヘツドを光磁気記録媒体との関係を示す要部断面
図、第２図は光磁気記録装置に用いる磁気ヘツドの外形
状を示す斜視図、第３図は従来の光磁気記録媒体と磁石
の関係を示す要部断面図、第４図は磁性層と磁気ヘツド
との距離と磁界強度との関係を示すグラフ。 図において、 １……透明基板 ２……誘電体層 ３……磁性層 ４……保護層 ５……接着層 ６……本発明の高分子シート ７……潤滑層 ８……本発明の磁気ヘツド1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional view of a main part showing the relationship between a magnetic head and a magneto-optical recording medium, and FIG. 2 is a magnetic head used in a magneto-optical recording apparatus. Fig. 3 is a perspective view showing the outer shape of Fig. 3, Fig. 3 is a sectional view showing the relationship between a conventional magneto-optical recording medium and a magnet, and Fig. 4 is a graph showing the relationship between the distance between the magnetic layer and the magnetic head and the magnetic field strength. . In the figure, 1 ... Transparent substrate 2 ... Dielectric layer 3 ... Magnetic layer 4 ... Protective layer 5 ... Adhesive layer 6 ... Inventive polymer sheet 7 ... Lubricating layer 8 ... Inventive magnetic Head
Claims (4)
薄膜層を順次形成した光磁気記録媒体に、上記薄膜層上
に接着層を介して、潤滑剤が含浸され、もしくは磁気ヘ
ッド対向面に潤滑層が形成された高分子シートを接着さ
せてなるとともに、上記光磁気記録媒体に外部磁界を印
加する磁気ヘッドの媒体対向面が略曲面形状となること
を特徴とする光磁気記録装置。1. A magneto-optical recording medium in which a dielectric layer, a magnetic layer, and a thin film layer of a protective layer are sequentially formed on a transparent substrate, and a lubricant is impregnated on the thin film layer via an adhesive layer, or a magnetic layer is formed. A magneto-optical device characterized in that a polymer sheet having a lubricating layer formed on the head-opposing surface is adhered, and the medium-opposing surface of a magnetic head for applying an external magnetic field to the magneto-optical recording medium has a substantially curved shape. Recording device.
録装置において、前記光磁気記録媒体における潤滑剤は
脂肪酸又はエステル又はその混合物からなることを特徴
とする光磁気記録装置。2. A magneto-optical recording apparatus according to claim 1, wherein the lubricant in the magneto-optical recording medium is a fatty acid, an ester or a mixture thereof.
録装置において、前記光磁気記録媒体における高分子シ
ートはポリエステル又は塩化ビニルからなることを特徴
とする光磁気記録装置。3. A magneto-optical recording apparatus according to claim 1, wherein the polymer sheet in the magneto-optical recording medium is made of polyester or vinyl chloride.
録装置において、前記光磁気記録媒体における高分子シ
ートの厚さを５μｍ〜100μｍ以内にしたことを特徴と
する光磁気記録装置。4. A magneto-optical recording apparatus according to claim 1, wherein the thickness of the polymer sheet in the magneto-optical recording medium is within 5 μm to 100 μm. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62199605A JP2556709B2 (en) | 1987-08-10 | 1987-08-10 | Magneto-optical recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62199605A JP2556709B2 (en) | 1987-08-10 | 1987-08-10 | Magneto-optical recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6443834A JPS6443834A (en) | 1989-02-16 |
| JP2556709B2 true JP2556709B2 (en) | 1996-11-20 |
Family
ID=16410641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62199605A Expired - Fee Related JP2556709B2 (en) | 1987-08-10 | 1987-08-10 | Magneto-optical recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556709B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03248351A (en) * | 1990-02-23 | 1991-11-06 | Sharp Corp | Magneto-optical recording medium and magnetic recoding and reproducing device using the same |
| ATE187839T1 (en) * | 1990-06-29 | 2000-01-15 | Sony Corp | RECORDING/REPRODUCTION SYSTEM FOR A MAGNETO-OPTICAL DISC |
| JP3327404B2 (en) * | 1991-09-30 | 2002-09-24 | ソニー株式会社 | Magneto-optical disk system and magneto-optical disk |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57130235A (en) * | 1981-02-03 | 1982-08-12 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS5857632A (en) * | 1981-10-01 | 1983-04-05 | Nec Corp | Flexible magnetic recording medium |
| JPS5965950A (en) * | 1982-10-05 | 1984-04-14 | Canon Inc | Optical recording element |
| JPS6398857A (en) * | 1986-10-16 | 1988-04-30 | Fujitsu Ltd | Magneto-optical disk |
-
1987
- 1987-08-10 JP JP62199605A patent/JP2556709B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6443834A (en) | 1989-02-16 |
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