JPH0520818B2 - - Google Patents
Info
- Publication number
- JPH0520818B2 JPH0520818B2 JP2324343A JP32434390A JPH0520818B2 JP H0520818 B2 JPH0520818 B2 JP H0520818B2 JP 2324343 A JP2324343 A JP 2324343A JP 32434390 A JP32434390 A JP 32434390A JP H0520818 B2 JPH0520818 B2 JP H0520818B2
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- thin film
- magnetic thin
- recording
- amorphous 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 19
- 239000010409 thin film Substances 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 10
- 229910052723 transition metal Inorganic materials 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 150000003624 transition metals Chemical class 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 239000010408 film Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002902 ferrimagnetic material Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 230000005374 Kerr effect Effects 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 230000005293 ferrimagnetic effect Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229910000982 rare earth metal group alloy Inorganic materials 0.000 description 1
- -1 rare earth transition metal Chemical class 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明は光を用いて情報の記録、再生、消去を
行い得る磁気光学記録装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a magneto-optical recording device capable of recording, reproducing, and erasing information using light.
＜従来技術＞
近年、HeNeレーザ、半導体レーザ等を用いて
磁性薄膜上に、光学的に情報を記憶、再生、消去
する方式、即ち、磁気光学記録方式が注目され、
産業界等において重点的に研究開発が推進される
に至つた。<Prior art> In recent years, a method of optically storing, reproducing, and erasing information on a magnetic thin film using a HeNe laser, a semiconductor laser, etc., that is, a magneto-optical recording method, has attracted attention.
Research and development has come to be intensively promoted in industry.
この方式においては、記録ヘツドであるレンズ
と記録媒体との間に約１mm程度の間〓をもうける
ことが可能である為、記憶媒体とレンズとの間に
透明な保護板を設けことにより、記録媒体に直接
塵埃が付着することを確実に防止でき、従来の磁
気ヘツドを用いた記録方式と比較して塵埃の影響
を少なくすることができるという利点がある。 In this method, it is possible to create a gap of about 1 mm between the lens, which is the recording head, and the recording medium, so by providing a transparent protective plate between the recording medium and the lens, recording is possible. This method has the advantage that it is possible to reliably prevent dust from directly adhering to the medium, and that the influence of dust can be reduced compared to the conventional recording method using a magnetic head.
また、透明な保護板の厚みを適宜変化させるこ
とにより、レンズと記憶円板との接触を確実に防
止でき、従来方式では除去し得なかつたヘツドク
ラツシユを完全に防止できるという利点がある。 Further, by appropriately changing the thickness of the transparent protective plate, it is possible to reliably prevent contact between the lens and the storage disk, and there is an advantage that head crush, which could not be removed with conventional methods, can be completely prevented.
更に、この方式によれば記録ビツト径を光の波
長程度（約1μｍ以下）に極小化し得ることとな
る為、従来の磁気ヘツド方式と比較して非常に高
密度化し得るという利点もある。 Furthermore, according to this method, the recording bit diameter can be minimized to about the wavelength of light (approximately 1 .mu.m or less), so it has the advantage of being able to achieve a much higher density than the conventional magnetic head method.
＜発明が解決しようとする問題点＞
上記した磁気光学記録方式に使用可能な磁性材
料は種々提案されているが、本発明は各種磁性材
料の中でも、特に、ガドリニウム、テルビウム、
ジスプロシウム、ホルミウム等の重希土類と、
鉄、コバルト、ニツケル等の遷移金属とを種々の
組成比で組み合わせて形成されるアモルフアスフ
エリ磁性体を記録材料とする場合における問題点
を解決せんとしたものである。<Problems to be Solved by the Invention> Various magnetic materials that can be used in the above-mentioned magneto-optical recording system have been proposed, but the present invention specifically uses gadolinium, terbium,
Heavy rare earths such as dysprosium and holmium,
This is an attempt to solve problems when amorphous ferrimagnetic materials formed by combining transition metals such as iron, cobalt, and nickel in various composition ratios are used as recording materials.
即ち、これら希土類遷移金属アモルフアスフエ
リ磁性体は再生信号レベルが小さいという難点が
あり、その再生性能を高めるための素子構造が求
められた。 That is, these rare earth transition metal amorphous ferrimagnetic materials have the disadvantage that the reproduced signal level is low, and an element structure for improving the reproduction performance has been required.
＜問題点を解決するための手段＞
本発明は上記の問題点を解決するために、ガラ
スあるいは樹脂製の透明な基板上に、希土類と遷
移金属の合金からなる記憶用のアモルフアス磁性
体薄膜を成膜し、該アモルフアス磁性体薄膜上に
紫外線硬化層を形成してなる磁気光学記憶円板
に、前記基板を介してレーザ光を前記アモルフア
ス磁性体薄膜に入射して情報の記録、再生、消去
等を行う構成とした磁気光学記録装置である。ま
た、この構成の中で前記基板の厚みが0.1mm乃至
１mm程度であることが好ましい。<Means for Solving the Problems> In order to solve the above problems, the present invention provides an amorphous magnetic thin film for storage made of an alloy of rare earth and transition metals on a transparent substrate made of glass or resin. A laser beam is incident on the amorphous magnetic thin film through the substrate to record, reproduce, and erase information on a magneto-optical storage disk formed by forming a film and forming an ultraviolet curing layer on the amorphous magnetic thin film. This is a magneto-optical recording device configured to perform the following operations. Further, in this configuration, it is preferable that the thickness of the substrate is about 0.1 mm to 1 mm.
＜作用＞
本発明は上記構成によつて、希土類と遷移金属
の合金からなる記録用のアモルフアス磁性体薄膜
を用いた磁気光学記録装置における信号品質を向
上するものである。<Function> With the above configuration, the present invention improves the signal quality in a magneto-optical recording device using an amorphous magnetic thin film for recording made of an alloy of a rare earth element and a transition metal.
＜実施例＞
以下、本発明にかかる実施例について詳細に説
明する。<Examples> Examples according to the present invention will be described in detail below.
第１図は、本発明にかかる磁気光学記録装置に
用いられる磁気光学記憶円板の側面図である。 FIG. 1 is a side view of a magneto-optic storage disk used in a magneto-optic recording device according to the present invention.
同図の磁気光学記憶円板は、コーニングマイコ
ロシート等のガラス円板、或はCR−39、アクリ
ル、ポリカーボネート等の樹脂製円板１の下面
に、真空蒸着法、スパツタリング法、イオンプレ
ーテイング法等により、GdTbFe、GdDyFe、
TbDyFe、TbFe、DyFe、GdTbFeNi等のアモ
ルフアスフエリ磁性体薄膜２を形成し、更に該ア
モルフアスフエリ磁性体薄膜２の下面にフオート
ボンド、ロツクタイトＸ−853等の紫外線硬化接
着層３を介して、前記と同じ材料のガラス円板或
は樹脂製の円板４を固着して四層構造としてい
る。 The magneto-optical storage disk shown in the figure is a glass disk such as Corning Microsheet, or a resin disk 1 such as CR-39, acrylic, polycarbonate, etc., and is coated on the bottom surface of the disk by vacuum evaporation, sputtering, or ion plating. GdTbFe, GdDyFe,
An amorphous spherical magnetic thin film 2 of TbDyFe, TbFe, DyFe, GdTbFeNi, etc. is formed, and an ultraviolet curing adhesive layer 3 of Photobond, Loctite X-853, etc. is formed on the lower surface of the amorphous magnetic thin film 2. A glass disc made of the same material as above or a resin disc 4 is fixed to form a four-layer structure.
第２図は、上記磁気光学記録円板と記録ヘツド
との関係を示す側面略図である。 FIG. 2 is a schematic side view showing the relationship between the magneto-optic recording disk and the recording head.
同図において、第１図の磁気光学記録円板の円
板１の上方に集光レンズ５及び記録消去用磁場発
生用のコイル６を有する記録ヘツド７を図示しな
いフオーカスサーボと連動させ、記録、再生、消
去を行う場合にアモルフアスフエリ磁性体薄膜２
との距離を一定に保持し得るようにしている。
尚、再生の時には記録再生用磁場発生用のコイル
は使用しないが、集光レンズ５のフオーカスサー
ボが行われる。 In the figure, a recording head 7 having a condensing lens 5 and a coil 6 for generating a magnetic field for recording and erasing is connected to a focus servo (not shown) above the disk 1 of the magneto-optical recording disk of FIG. , amorphous amorphous magnetic thin film 2 when performing reproduction and erasing.
It is possible to maintain a constant distance from the
Note that during reproduction, the coil for generating magnetic fields for recording and reproduction is not used, but focus servo of the condenser lens 5 is performed.
尚、集光レンズ５の構成を選択することにより
記録ヘツド７とアモルフアスフエリ磁性体薄膜２
との間〓を変化させることができる為、透明な円
板１の厚みを例えば0.1mm乃至１mm位の範囲内で
自由に選択できる。 Note that by selecting the configuration of the condenser lens 5, the recording head 7 and the amorphous magnetic thin film 2 can be
The thickness of the transparent disc 1 can be freely selected within the range of, for example, 0.1 mm to 1 mm.
前記円板１，４の厚み、材質は本発明の要旨を
逸脱しない範囲内で自由に選ぶことができる。 The thickness and material of the disks 1 and 4 can be freely selected without departing from the gist of the present invention.
例えば、円板１として0.3〜0.5mmの厚みのコー
ニングマイクロシートを使用した場合には磁気光
学記憶円板の強度を保つ為、円板４として１〜３
mmのアクリル板を使用すれば良い。 For example, if a Corning microsheet with a thickness of 0.3 to 0.5 mm is used as disk 1, in order to maintain the strength of the magneto-optical storage disk, 1 to 3
mm acrylic board should be used.
又、記録ヘツド７と相対しない円板はアルミニ
ウム等金属板、セラミツク板等でもよい。 Further, the disk that does not face the recording head 7 may be a metal plate such as aluminum, a ceramic plate, or the like.
＜効果＞
以上の本発明によれば、成膜を行つた透明基板
を介してレーザ光をアモルフアス磁性体薄膜に入
射して情報の記録、再生、消去等を行う構成とし
たので、レーザ光が照射されるのは、基板に接す
る側のアモルフアス磁性体薄膜の経年変化の生じ
にくく、いつまでも新鮮な面であり、希土類と遷
移金属の合金からなる磁性体という極めて劣化し
たすい材料を用いながらも磁気光学記録装置の信
頼性を長年にわたり維持できるものである。<Effects> According to the present invention, the laser beam is incident on the amorphous magnetic thin film through the transparent substrate on which the film is formed to perform information recording, reproduction, erasing, etc. What is irradiated is the amorphous magnetic thin film on the side that is in contact with the substrate, which is less likely to change over time and remains fresh. The reliability of the optical recording device can be maintained for many years.
更に、成膜を行つた透明基板を介してレーザ光
をアモルフアス磁性体薄膜に入射することによつ
て、透明基板がカー効果を増感する効果を有する
ので、良好な信号再生を行うことができる。 Furthermore, by making the laser beam incident on the amorphous magnetic thin film through the transparent substrate on which the film has been formed, the transparent substrate has the effect of sensitizing the Kerr effect, so that good signal reproduction can be performed. .
図面は本発明の一実施例を示し、第１図は、磁
気光学記憶円板の側面図、第２図は、磁気光学記
憶円板と記録ヘツドとの関係を示す側面略図。
１，４……円板、２……アモルフアスフエリ磁
性体薄膜、３……紫外線硬化剤。
The drawings show an embodiment of the present invention; FIG. 1 is a side view of a magneto-optical storage disk, and FIG. 2 is a schematic side view showing the relationship between the magneto-optic storage disk and a recording head. 1, 4...disc, 2...amorphous ferrimagnetic thin film, 3...ultraviolet curing agent.
Claims (1)
土類と遷移金属の合金からなる記憶用のアモルフ
アス磁性体薄膜を成膜し、該アモルフアス磁性体
薄膜上に紫外線硬化層を形成してなる磁気光学記
憶円板に、前記基板を介してレーザ光を前記アモ
ルフアス磁性体薄膜に入射して情報の記録、再
生、消去等を行う構成とした磁気光学記憶装置。 ２ 前記基板の厚みが0.1mm乃至１mm程度である
ことを特徴とする特許請求の範囲第１項記載の磁
気光学記憶装置。[Claims] 1. An amorphous magnetic thin film for storage made of an alloy of rare earth and transition metal is formed on a transparent substrate made of glass or resin, and an ultraviolet curing layer is formed on the amorphous magnetic thin film. 1. A magneto-optical storage device comprising a magneto-optic storage disk having a structure in which a laser beam is incident on the amorphous magnetic thin film through the substrate to record, reproduce, erase, etc. information. 2. The magneto-optical storage device according to claim 1, wherein the thickness of the substrate is approximately 0.1 mm to 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32434390A JPH03205632A (en) | 1990-11-26 | 1990-11-26 | Magneto-optical recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32434390A JPH03205632A (en) | 1990-11-26 | 1990-11-26 | Magneto-optical recorder |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7207380A Division JPS56169238A (en) | 1980-05-28 | 1980-05-28 | Magnetooptical storage disk |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32294395A Division JPH08212619A (en) | 1995-12-12 | 1995-12-12 | Magneto-optical storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03205632A JPH03205632A (en) | 1991-09-09 |
| JPH0520818B2 true JPH0520818B2 (en) | 1993-03-22 |
Family
ID=18164724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32434390A Granted JPH03205632A (en) | 1990-11-26 | 1990-11-26 | Magneto-optical recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03205632A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5068102A (en) * | 1973-10-15 | 1975-06-07 | ||
| JPS5231703A (en) * | 1975-09-05 | 1977-03-10 | Kokusai Denshin Denwa Co Ltd <Kdd> | Magnetic thin film recording medium |
| JPS5489704A (en) * | 1977-12-12 | 1979-07-17 | Philips Nv | Disk recording medium with coating layer |
| JPS54123922A (en) * | 1978-03-17 | 1979-09-26 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPS5538665A (en) * | 1978-09-08 | 1980-03-18 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS55109193A (en) * | 1979-02-16 | 1980-08-22 | Hitachi Ltd | Stationary scherbius system controller |
-
1990
- 1990-11-26 JP JP32434390A patent/JPH03205632A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5068102A (en) * | 1973-10-15 | 1975-06-07 | ||
| JPS5231703A (en) * | 1975-09-05 | 1977-03-10 | Kokusai Denshin Denwa Co Ltd <Kdd> | Magnetic thin film recording medium |
| JPS5489704A (en) * | 1977-12-12 | 1979-07-17 | Philips Nv | Disk recording medium with coating layer |
| JPS54123922A (en) * | 1978-03-17 | 1979-09-26 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
| JPS5538665A (en) * | 1978-09-08 | 1980-03-18 | Matsushita Electric Ind Co Ltd | Optical recording member |
| JPS55109193A (en) * | 1979-02-16 | 1980-08-22 | Hitachi Ltd | Stationary scherbius system controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03205632A (en) | 1991-09-09 |
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