JPH0338661B2 - - Google Patents
Info
- Publication number
- JPH0338661B2 JPH0338661B2 JP55101604A JP10160480A JPH0338661B2 JP H0338661 B2 JPH0338661 B2 JP H0338661B2 JP 55101604 A JP55101604 A JP 55101604A JP 10160480 A JP10160480 A JP 10160480A JP H0338661 B2 JPH0338661 B2 JP H0338661B2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- magnetic thin
- magneto
- substrate
- transparent
- 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
- 239000010409 thin film Substances 0.000 claims description 13
- 230000005291 magnetic effect Effects 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 claims 1
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 229920003002 synthetic resin Polymers 0.000 claims 1
- 239000000057 synthetic resin Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 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
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005293 ferrimagnetic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
Description
【発明の詳細な説明】
本発明は、光を用いて情報の記録、再生、消去
の少なくとも１つの動作を行なう磁気光学記録装
置に使用する磁気光学記憶素子に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magneto-optic storage element used in a magneto-optic recording device that performs at least one of recording, reproducing, and erasing information using light.
近年HeNeレーザ、Arレーザ、半導体レーザ
等を用いて磁性薄膜上に、光学的に情報の記録、
再生、消去の何れかを行なう方式、即ち磁気光学
記録方式が高密度化、大容量化、及びアクセスの
高速化が可能な方式として注目され、産業界等に
おいて重点的に研究開発が推進されている。 In recent years, information has been optically recorded on magnetic thin films using HeNe lasers, Ar lasers, semiconductor lasers, etc.
The magneto-optical recording method, which performs either reading or erasing, has attracted attention as a method that allows for higher density, larger capacity, and faster access, and research and development is being intensively promoted in industry. There is.
また、この方式に用いる記憶材料として種々の
合金製磁性体が、情報の書き換えが可能なことか
ら注目されている。 In addition, various alloy magnetic materials are attracting attention as storage materials used in this method because they allow information to be rewritten.
しかし、従来の磁気光学記憶素子は、一対の基
板間に磁性体薄膜を挾持させることにより形成さ
れているので、特に長期間の保存を必要とする磁
気光学記憶素子においては、磁性材料として
Fe2O3、CrO2等酸化物を用いたものを除き、大
気、水蒸気に触れると腐食されるので使用条件が
制約されることは知られていたが、しかしこれま
では希土類と遷移金属との合金材からなる記録媒
体の酸素や、湿度、温度などに対する化学的な質
性は解明されておらず、こうしたことから使用環
境、保存環境等に制約があり、極めて使い勝手が
悪かつたのである。 However, since conventional magneto-optical memory elements are formed by sandwiching a magnetic thin film between a pair of substrates, the magnetic material is
It has been known that, except for those using oxides such as Fe 2 O 3 and CrO 2 , the usage conditions are restricted because they corrode when exposed to the atmosphere or water vapor. The chemical properties of recording media made of alloy materials with respect to oxygen, humidity, temperature, etc. have not been elucidated, and this has placed restrictions on the environment in which they can be used and stored, making them extremely inconvenient to use. .
本発明は磁性体薄膜を確実に大気と遮断し得る
ようにして上記の欠点を解消したものであり、以
下実施例を示す添付図面によつて詳細に説明す
る。 The present invention solves the above-mentioned drawbacks by making it possible to reliably isolate the magnetic thin film from the atmosphere, and will be described in detail below with reference to the accompanying drawings showing embodiments.
図面は円板状に形成した実施例を示し、コーニ
ングマイクロシート等ガラス製の円板或はアクリ
ル、ポリカーボネート等樹脂製の円板１（第１の
基板）の上面に、外端縁部及び内端縁部を除い
て、Sm、Eu、Gd、Tb、Dy、Ho、Er等希土類
とFe、Co、Ni等遷移金属とを種々の組成比で組
合わせて構成されるアモルフアスフエリ磁性体薄
膜２を形成し、更に、前記円板１の内外端縁部と
アモルフアスフエリ磁性体薄膜２の上面とに紫外
線硬化接着剤層３を介して前記ガラス製或は樹脂
製の円板４（第２の基板）を固着している。尚５
は中心孔である。 The drawing shows an embodiment formed into a disk shape, and the outer edge and the inner edge are formed on the upper surface of a disk 1 (first substrate) made of glass such as Corning microsheet or resin such as acrylic or polycarbonate. Amorphous ferrimagnetic thin film composed of rare earth elements such as Sm, Eu, Gd, Tb, Dy, Ho, and Er and transition metals such as Fe, Co, and Ni in various composition ratios, except for the edges. Further, the glass or resin disk 4 (the second 2) is fixed. Nao 5
is the central hole.
また、円板１，４の双方が透明であることは必
要でなく、記録ヘツドと相対する側の円板のみが
透明であれば足り、従つて他側の円板としてAl
等金属板、セラミツクス板等を用いることが可能
であり、更には円板以外にテープ等にも実施可能
である。 Further, it is not necessary that both the disks 1 and 4 be transparent, and it is sufficient that only the disk on the side facing the recording head is transparent, and therefore, the disk on the other side is made of aluminum.
It is possible to use metal plates, ceramic plates, etc., and furthermore, it is also possible to use tapes etc. in addition to disks.
更には接着剤として紫外線硬化接着剤に限定さ
れるものではなく、通常の接着剤を用いても良
い。 Furthermore, the adhesive is not limited to ultraviolet curing adhesives, and ordinary adhesives may be used.
また、円板１の内外両端縁部を除いて磁性体薄
膜２を形成する方法としては種々の方法が考えら
れるが、例えば真空蒸着法による場合はマスクを
使用することにより簡単にでき、またスパツタリ
ング法による場合はマスクを使用すると磁性材料
を均一に形成することが困難であることから、一
旦円板１の上面全てに磁性体薄膜を形成した後、
エツチング法により端縁部の磁性体薄膜を除去す
ればよい。 Various methods can be considered for forming the magnetic thin film 2 on both the inner and outer edges of the disk 1, but for example, vacuum evaporation can be easily done by using a mask, or sputtering can be used. When using the method, it is difficult to uniformly form the magnetic material using a mask, so once a magnetic thin film is formed on the entire top surface of the disk 1,
The magnetic thin film at the edge may be removed by etching.
以上のように、本願発明は、特に酸化し易く、
しかも酸化することにより磁気特性が著しく変化
を起こし易い希土類を磁性体薄膜としているの
で、製作中並びに製品化後においても酸素との接
触をなくすることが極めて重要なことから、本願
発明は上述のように第１の基板と接触しない磁性
体薄膜の全面を無酸素雰囲気中で接着剤により掩
うことにより大気と完全に遮断して、腐食、磁化
特性劣化等を確実に防止し得るという特有の効果
を奏する。 As mentioned above, the present invention is particularly easy to oxidize,
Moreover, since the magnetic thin film is made of rare earths whose magnetic properties tend to change significantly when oxidized, it is extremely important to eliminate contact with oxygen during manufacturing and after commercialization. The unique feature of this method is that by covering the entire surface of the magnetic thin film that does not come into contact with the first substrate with an adhesive in an oxygen-free atmosphere, it is completely isolated from the atmosphere, thereby reliably preventing corrosion, deterioration of magnetization characteristics, etc. be effective.
図面は本発明の一実施例を示す磁気光学記憶円
板の中央縦断面図。
１，４……円板、２……アモルフアスフエリ磁
性体薄膜、３……紫外線硬化接着剤。
The drawing is a central vertical sectional view of a magneto-optical storage disk showing an embodiment of the present invention. 1, 4...disc, 2...amorphous amorphous magnetic thin film, 3...ultraviolet curing adhesive.
Claims (1)
１の基板上に、該第１の基板の内外端縁部を除い
て希土類と遷移金属の合金からなる磁気光学記憶
用のアモルフアス磁性体薄膜を成膜し、該薄膜の
外面を掩つて塗布した接着剤を介して透明な第２
の基板を接着せしめることにより、前記磁性体薄
膜を大気から遮断したことを特徴とする磁気光学
記憶素子。1. On a transparent first substrate made of glass or synthetic resin material, an amorphous magnetic thin film for magneto-optical storage made of an alloy of rare earth and transition metal is formed, except for the inner and outer edges of the first substrate. Then, a transparent second layer is applied via the adhesive applied by covering the outer surface of the thin film.
1. A magneto-optical memory element, characterized in that the magnetic thin film is shielded from the atmosphere by bonding a substrate.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10160480A JPS5727494A (en) | 1980-07-23 | 1980-07-23 | Magneto-optical storage element |
| US06/275,388 US4414650A (en) | 1980-06-23 | 1981-06-19 | Magneto-optic memory element |
| FR8112234A FR2485241B1 (en) | 1980-06-23 | 1981-06-22 | MAGNETO-OPTICAL MEMORY ELEMENT |
| GB8119345A GB2081537B (en) | 1980-06-23 | 1981-06-23 | Magneto-optic memory element |
| DE3124573A DE3124573C2 (en) | 1980-06-23 | 1981-06-23 | Magneto-optical storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10160480A JPS5727494A (en) | 1980-07-23 | 1980-07-23 | Magneto-optical storage element |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7450092A Division JP2665295B2 (en) | 1992-03-30 | 1992-03-30 | Magneto-optical storage element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5727494A JPS5727494A (en) | 1982-02-13 |
| JPH0338661B2 true JPH0338661B2 (en) | 1991-06-11 |
Family
ID=14304985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10160480A Granted JPS5727494A (en) | 1980-06-23 | 1980-07-23 | Magneto-optical storage element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5727494A (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954056A (en) * | 1982-09-21 | 1984-03-28 | Sharp Corp | Magnetooptic storage element |
| JPS5996544A (en) * | 1982-11-24 | 1984-06-04 | Sony Corp | Optical information recording medium |
| JPS6010431A (en) * | 1983-06-29 | 1985-01-19 | Canon Inc | Optical recording medium |
| JPH0622068B2 (en) * | 1984-03-01 | 1994-03-23 | ソニー株式会社 | Method for manufacturing magneto-optical recording medium |
| JPS615451A (en) * | 1984-06-19 | 1986-01-11 | Matsushita Electric Ind Co Ltd | Information recording carrier |
| JPS6139950A (en) * | 1984-07-31 | 1986-02-26 | Matsushita Electric Ind Co Ltd | Flat information recording medium |
| JPS6154054A (en) * | 1984-08-23 | 1986-03-18 | Matsushita Electric Ind Co Ltd | Plate information recording medium |
| JPS61144744A (en) * | 1984-12-17 | 1986-07-02 | Kyocera Corp | Optomagnetic recording medium and its production |
| JPS61153133U (en) * | 1985-03-13 | 1986-09-22 | ||
| JPS6246448A (en) * | 1985-08-23 | 1987-02-28 | Tdk Corp | Photomagnetic recording medium |
| JPS6243850A (en) * | 1985-08-21 | 1987-02-25 | Tdk Corp | Photomagnetic recording medium |
| JPS63167442A (en) * | 1986-12-29 | 1988-07-11 | Mitsubishi Kasei Corp | Optical disk |
| JP2855659B2 (en) * | 1989-06-05 | 1999-02-10 | ソニー株式会社 | Magneto-optical recording medium |
| JPH0652589B2 (en) * | 1990-11-27 | 1994-07-06 | 株式会社東芝 | Method for manufacturing optical information storage carrier |
| JPH0746445B2 (en) * | 1993-10-12 | 1995-05-17 | ダイセル化学工業株式会社 | Magneto-optical recording disk and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5175523A (en) * | 1974-12-26 | 1976-06-30 | Canon Kk | |
| JPS52109193A (en) * | 1976-03-11 | 1977-09-13 | Kokusai Denshin Denwa Co Ltd | Magnetoooptic memory medium |
| JPS5489704A (en) * | 1977-12-12 | 1979-07-17 | Philips Nv | Disk recording medium with coating layer |
| JPS54130902A (en) * | 1978-03-22 | 1979-10-11 | Philips Nv | Multilayer information disk |
| JPS5528227B2 (en) * | 1974-09-24 | 1980-07-26 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6327298Y2 (en) * | 1978-08-09 | 1988-07-25 |
-
1980
- 1980-07-23 JP JP10160480A patent/JPS5727494A/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5528227B2 (en) * | 1974-09-24 | 1980-07-26 | ||
| JPS5175523A (en) * | 1974-12-26 | 1976-06-30 | Canon Kk | |
| JPS52109193A (en) * | 1976-03-11 | 1977-09-13 | Kokusai Denshin Denwa Co Ltd | Magnetoooptic memory medium |
| JPS5489704A (en) * | 1977-12-12 | 1979-07-17 | Philips Nv | Disk recording medium with coating layer |
| JPS54130902A (en) * | 1978-03-22 | 1979-10-11 | Philips Nv | Multilayer information disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5727494A (en) | 1982-02-13 |
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