JPS62262248A - Production of magneto-optical recording medium - Google Patents
Production of magneto-optical recording mediumInfo
- Publication number
- JPS62262248A JPS62262248A JP10593686A JP10593686A JPS62262248A JP S62262248 A JPS62262248 A JP S62262248A JP 10593686 A JP10593686 A JP 10593686A JP 10593686 A JP10593686 A JP 10593686A JP S62262248 A JPS62262248 A JP S62262248A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- magneto
- recording medium
- optical recording
- film
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 239000004417 polycarbonate Substances 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 229920000515 polycarbonate Polymers 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 3
- 238000000137 annealing Methods 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 101100042630 Caenorhabditis elegans sin-3 gene Proteins 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、書き換え可能な光磁気ディスクなどに用いら
れ、磁気カー回転効果あるいはファラデー効果などの磁
気光学効果を用いて読み出すことのできる先磁気言己録
媒体の製造方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention is used for rewritable magneto-optical disks, etc., and is a pre-magnetic disk that can be read using magneto-optic effects such as the magnetic Kerr rotation effect or the Faraday effect. The present invention relates to a method for producing a self-recording medium.
（従来の技術）
従来、情報を熱磁気的に記録し、磁気光学的に再生する
光磁気記録媒体は、透明な有機物基板あるいはガラス基
板上に誘電体からなる保護層、垂直磁化膜の記録層、金
属膜からなる反射層などを種々の組み合せ、スパッタ法
あるいは蒸着法により成膜されてきた。垂直磁化膜とし
てはＧｄＴｂＦｅ。(Prior Art) Conventionally, a magneto-optical recording medium that records information thermomagnetically and reproduces it magneto-optically has a protective layer made of a dielectric material and a recording layer of a perpendicularly magnetized film on a transparent organic substrate or glass substrate. , reflective layers made of metal films, etc. have been formed using various combinations of sputtering or vapor deposition methods. The perpendicular magnetization film is GdTbFe.
ＤｙＦｅ、ＧｄＣｏ、ＴｂＣｏ、ＴｂＤｙＦｅ、ＴｂＦ
ｅＣｏなどの希土類−遷移金属の非晶質合金薄膜が量産
に適し、かつ読み出しノイズが少ない等から有望とされ
ている。DyFe, GdCo, TbCo, TbDyFe, TbF
Rare earth-transition metal amorphous alloy thin films such as eCo are considered promising because they are suitable for mass production and have low readout noise.
ディスク基板は、ガラス基板と有機物基板の２種類に大
別できる。この内、ガラス基板は破損しやすくかつ高価
であることから有機物基板が主に用いられている。有機
物基板としては、ＰＭＭＡ、ＰＣ、エポキシ等が用いら
れている。ＰＭＭＡは吸温性が大きく経時変化でディク
スが変形するという問題がある。またエポキシは射出成
形法で作製できないという問題がある。このため光磁気
記録媒体の基板としてはＰＣがもっとも有望であるとさ
れている。Disk substrates can be roughly divided into two types: glass substrates and organic substrates. Among these, organic substrates are mainly used because glass substrates are easily damaged and expensive. As the organic substrate, PMMA, PC, epoxy, etc. are used. PMMA has a problem in that it has a large heat absorbing property and the disk deforms due to changes over time. Another problem is that epoxy cannot be manufactured by injection molding. For this reason, PC is said to be the most promising substrate for magneto-optical recording media.
（発明が解決しようとする問題点）
ＰＣ基板を用いた光磁気ディスクは、ガラス基板を用い
たものと比較して再生Ｃ／Ｎが大きく劣化する。この劣
化要因はＰＣ基板の大きな複屈折にある。基板のもつ複
屈折値自体よりも円周方向の複屈折の変動の大きさが、
大きな影響を与える。(Problems to be Solved by the Invention) A magneto-optical disk using a PC board has a significantly degraded reproduction C/N compared to one using a glass substrate. The cause of this deterioration is the large birefringence of the PC board. The magnitude of the variation in birefringence in the circumferential direction is more important than the birefringence value itself of the substrate.
make a big impact.
本発明の目的は、再生特性の優れた光磁気記録媒体の製
造方法を提供することにある。An object of the present invention is to provide a method for manufacturing a magneto-optical recording medium with excellent reproduction characteristics.
（問題点を解決するための手段）
本発明はＰＣ基板上に、垂直磁化膜の記録層を含む光磁
気記録媒体を成膜する場合において、ＰＣ基板を成膜前
に１３０℃以下の温度でアニールすること゛ を特徴と
する。(Means for Solving the Problems) When forming a magneto-optical recording medium including a recording layer of a perpendicularly magnetized film on a PC board, the present invention provides that the PC board is heated at a temperature of 130° C. or lower before film formation. It is characterized by annealing.
（作用）
射出成形ＰＣ基板の複屈折は、フェニル基の凍結配向が
原因であり、これは基板の深さ方向、半径方向、円周方
向に分布をもつ。このフェニル基の凍結配向は。アニー
ルすることにより緩和することができ、複屈折の分布は
低減できる。アニール温度は、基板の軟化温度（〜１３
０℃）以下である必要がある。(Function) The birefringence of an injection-molded PC board is caused by the frozen orientation of phenyl groups, which has a distribution in the depth direction, radial direction, and circumferential direction of the board. The frozen orientation of this phenyl group is. It can be relaxed by annealing, and the birefringence distribution can be reduced. The annealing temperature is the softening temperature of the substrate (~13
0°C) or lower.
（実施例）
第１図に基板アニールによるＰＣ基板の複屈折の円周方
向分布を示す。８３０ｎｍで測定している。未処理のも
のと比較して複屈折の変動はアニール処理した基板の方
が小さくなっている。またその効果は、８０℃よりも１
２０℃でアニールした方が大きい。(Example) FIG. 1 shows the circumferential distribution of birefringence of a PC board due to substrate annealing. Measured at 830 nm. The variation in birefringence is smaller for the annealed substrate compared to the untreated one. Also, the effect is 1
It is larger when annealed at 20°C.
アニール時間はアニール温度に応じて所定の時間を選ぶ
。A predetermined annealing time is selected depending on the annealing temperature.
第２図は、本発明の一実施例を示している。１はＰＣ基
板、２は窒化ケイ素、３は光磁気記録媒体層（スパッタ
によるＴｂＦｅＣｏ）、４は窒化ケイ素である。この構
成の光磁気ディスクの基板入射再生Ｃ／Ｎは、未処理の
ものと比較し、８０°アニールで３ｄＢ１２０℃で６ｄ
Ｂ増加した。FIG. 2 shows an embodiment of the invention. 1 is a PC board, 2 is silicon nitride, 3 is a magneto-optical recording medium layer (TbFeCo formed by sputtering), and 4 is silicon nitride. The substrate input reproduction C/N of the magneto-optical disk with this configuration is 3 dB at 80° annealing and 6 d at 120°C compared to the untreated one.
B increased.
（発明の効果）
このように本発明により作製した光磁気記録媒体の再生
Ｃ／Ｎ特性は、従来のものよりも改善されている。(Effects of the Invention) As described above, the reproduction C/N characteristics of the magneto-optical recording medium manufactured according to the present invention are improved compared to the conventional ones.
第１図は、基板アニールによるＰＣ基板の複屈折の円周
方向分布の変化を示す図。第２図は、本発明の一実施例
を示す光磁気ディスクの断面図である。
１：ＰＣ基板 ２：ＳｉＮ３：光磁気記録
媒体層 ４：ＳｉＮ
・５）＼、′。FIG. 1 is a diagram showing changes in the circumferential distribution of birefringence of a PC board due to substrate annealing. FIG. 2 is a sectional view of a magneto-optical disk showing an embodiment of the present invention. 1: PC board 2: SiN 3: Magneto-optical recording medium layer 4: SiN ・5)\,'.
Claims (1)
録層を含む光磁気記録媒体を成膜する場合において、Ｐ
Ｃ基板を成膜前に１３０℃以下の温度でアニールするこ
とを特徴とする光磁気記録媒体の製造方法。When forming a magneto-optical recording medium including a recording layer of a perpendicularly magnetized film on a PC (polycarbonate) substrate, P
A method for manufacturing a magneto-optical recording medium, characterized in that a C substrate is annealed at a temperature of 130° C. or lower before film formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10593686A JPS62262248A (en) | 1986-05-08 | 1986-05-08 | Production of magneto-optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10593686A JPS62262248A (en) | 1986-05-08 | 1986-05-08 | Production of magneto-optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62262248A true JPS62262248A (en) | 1987-11-14 |
Family
ID=14420733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10593686A Pending JPS62262248A (en) | 1986-05-08 | 1986-05-08 | Production of magneto-optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62262248A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314344A (en) * | 1986-07-04 | 1988-01-21 | Konica Corp | Information recording medium |
| JPS6314343A (en) * | 1986-07-04 | 1988-01-21 | Konica Corp | Information recording medium |
| EP0276897A2 (en) * | 1987-01-30 | 1988-08-03 | Canon Kabushiki Kaisha | Process for producing substrate for optical disk by annealing substrate with gradient double refraction distribution |
| JPS63220439A (en) * | 1987-03-09 | 1988-09-13 | Fujitsu Ltd | Production of magneto-optical disk |
| JPH01159846A (en) * | 1987-12-17 | 1989-06-22 | Fujitsu Ltd | Production of magneto-optical disk |
| WO2000003054A1 (en) * | 1998-07-10 | 2000-01-20 | Nihon Seimitsu Co., Ltd. | Method for ion plating of synthetic resin and molded synthetic resin article having ion-plated coating |
| WO2004105014A1 (en) * | 2003-05-23 | 2004-12-02 | Fujitsu Limited | Magneto-optical recording medium, manufacturing method thereof, and magneto-optical recording device |
| US7480928B2 (en) * | 2001-09-28 | 2009-01-20 | Sony Corporation | Optical recording medium and method of producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62222812A (en) * | 1986-03-26 | 1987-09-30 | Mitsubishi Chem Ind Ltd | Manufacture of optical disc base made of polycarbonate resin |
-
1986
- 1986-05-08 JP JP10593686A patent/JPS62262248A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62222812A (en) * | 1986-03-26 | 1987-09-30 | Mitsubishi Chem Ind Ltd | Manufacture of optical disc base made of polycarbonate resin |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314344A (en) * | 1986-07-04 | 1988-01-21 | Konica Corp | Information recording medium |
| JPS6314343A (en) * | 1986-07-04 | 1988-01-21 | Konica Corp | Information recording medium |
| EP0276897A2 (en) * | 1987-01-30 | 1988-08-03 | Canon Kabushiki Kaisha | Process for producing substrate for optical disk by annealing substrate with gradient double refraction distribution |
| JPS63220439A (en) * | 1987-03-09 | 1988-09-13 | Fujitsu Ltd | Production of magneto-optical disk |
| JPH01159846A (en) * | 1987-12-17 | 1989-06-22 | Fujitsu Ltd | Production of magneto-optical disk |
| WO2000003054A1 (en) * | 1998-07-10 | 2000-01-20 | Nihon Seimitsu Co., Ltd. | Method for ion plating of synthetic resin and molded synthetic resin article having ion-plated coating |
| US7480928B2 (en) * | 2001-09-28 | 2009-01-20 | Sony Corporation | Optical recording medium and method of producing the same |
| WO2004105014A1 (en) * | 2003-05-23 | 2004-12-02 | Fujitsu Limited | Magneto-optical recording medium, manufacturing method thereof, and magneto-optical recording device |
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