JPH0463451B2 - - Google Patents
Info
- Publication number
- JPH0463451B2 JPH0463451B2 JP16115383A JP16115383A JPH0463451B2 JP H0463451 B2 JPH0463451 B2 JP H0463451B2 JP 16115383 A JP16115383 A JP 16115383A JP 16115383 A JP16115383 A JP 16115383A JP H0463451 B2 JPH0463451 B2 JP H0463451B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- moisture
- resistant
- guide track
- 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
Links
- 239000010410 layer Substances 0.000 claims description 149
- 230000005291 magnetic effect Effects 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 29
- 239000011241 protective layer Substances 0.000 claims description 20
- 229920003023 plastic Polymers 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000004544 sputter deposition Methods 0.000 description 7
- 239000004925 Acrylic resin Substances 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 6
- 229920002050 silicone resin Polymers 0.000 description 6
- 229920000178 Acrylic resin Polymers 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 230000005374 Kerr effect Effects 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005566 electron beam evaporation Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002902 ferrimagnetic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000001678 irradiating effect Effects 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
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 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
-
- 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
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
Description
【発明の詳細な説明】
技術分野
本発明はレーザー光によつて２値信号の磁気記
録を行なうための光磁気記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a magneto-optical recording medium for magnetically recording binary signals using laser light.
従来技術
近年、コンピユータや各種計測機器から出る２
値信号をレーザー光によつて磁気記録するための
光磁気記録媒体が盛んに研究開発されている。光
磁気記録媒体は高密度且つ大容量の記録、高速ア
クセス等、記録媒体としての種々の要求を満足す
る上、不要になつた情報を消去しその上に新しい
情報を再記録できるという特長を有するため、注
目されている。Conventional technology In recent years, 2
Magneto-optical recording media for magnetically recording value signals using laser light are being actively researched and developed. Magneto-optical recording media satisfy various requirements for recording media, such as high-density and large-capacity recording and high-speed access, and also have the feature of being able to erase information that is no longer needed and re-record new information on top of it. Therefore, it is attracting attention.
従来、光磁気記録媒体としてはアクリル樹脂、
ポリカーボネート樹脂等の透明プラスチツク板、
ガラス板等の透明基板上に、必要あれば紫外線硬
化性樹脂製の透光性ガイドトラツク層を設けた
後、その上にTbFe、GdCo当の非晶質磁性薄層
を設け、更に必要あればその上にAu、Al等の反
射層及び／又はSiO、SiO2等の保護層（又は誘電
体層）を設けたものが知られている。しかし基板
としてプラスチツク板を用いたものは水分を透過
したり吸水する性質があるため、高湿下や経時に
よつて磁性薄層が腐食し、多数のピンホールが生
じて使用不能となるという欠点がある。特に基板
と磁性薄層との間にガイドトラツク層が存在する
ものではトラツク層を構成する紫外線硬化性樹脂
に含まれる腐食性物質と相剰的に作用して前記欠
点は更にひどくなる。一方、基板としてガラス板
を用いたものは重く、割れ易く、しかも高価であ
るため、実用的でない。 Conventionally, acrylic resin, magneto-optical recording media,
Transparent plastic plates such as polycarbonate resin,
If necessary, a transparent guide track layer made of ultraviolet curable resin is provided on a transparent substrate such as a glass plate, and then an amorphous magnetic thin layer such as TbFe or GdCo is provided on it, and if necessary, It is known that a reflective layer such as Au or Al and/or a protective layer (or dielectric layer) such as SiO or SiO 2 is provided thereon. However, since plastic plates used as substrates have the property of permeating or absorbing moisture, the thin magnetic layer corrodes under high humidity or over time, resulting in the formation of numerous pinholes, making them unusable. There is. In particular, in the case where a guide track layer is present between the substrate and the magnetic thin layer, the above-mentioned drawbacks become more severe due to the additive action of the corrosive substances contained in the ultraviolet curable resin constituting the track layer. On the other hand, those using a glass plate as a substrate are heavy, easily broken, and expensive, so they are not practical.
目 的
本発明の目的はプラスチツク基板を用い、且つ
この基板の片面に透光性耐湿層を設けることによ
り、実用的で、しかも磁性薄層の腐食のない光磁
気記録媒体を提供することである。Purpose The purpose of the present invention is to provide a practical magneto-optical recording medium that is free from corrosion of the magnetic thin layer by using a plastic substrate and providing a light-transmitting moisture-resistant layer on one side of the substrate. .
構 成 本発明の光磁気記録媒体は次の通りである。composition The magneto-optical recording medium of the present invention is as follows.
(1) 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガ
イドトラツク層を設け更に前記ガイドトラツク
層上に磁性薄層を設けたもの。(1) A light-transmitting moisture-resistant layer is provided on a transparent plastic substrate, a light-transmitting guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, and a magnetic thin layer is further provided on the guide track layer.
(2) 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガ
イドトラツク層を設け、前記ガイドトラツク層
上に磁性薄層を設け、更に前記磁性薄層上に耐
湿性保護層又は反射層を設けたもの。(2) A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and the magnetic thin layer is provided on the guide track layer. A thin layer with a moisture-resistant protective layer or reflective layer.
(3) 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガ
イドトラツク層を設け、前記ガイドトラツク層
上に磁性薄層を設け、前記磁性薄層上に反射層
を設け、更に前記反射層上に耐湿性保護層を設
けたもの。(3) A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and the magnetic thin A reflective layer is provided on the layer, and a moisture-resistant protective layer is further provided on the reflective layer.
(4) 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガ
イドトラツク層を設け、更に前記ガイドトラツ
ク層上に磁性薄層を設けた２つの本体を、両磁
性薄層が相対して一定距離空間を形成するよう
に、端部にスペーサーを介して配列せしめ、得
られた複合体の両面に透光性耐湿性保護層を設
け、更に全体側面を耐湿性封止部材で封じてな
るもの。(4) A light-transmitting moisture-resistant layer is provided on a transparent plastic substrate, a light-transmitting guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, and a magnetic thin layer is further provided on the guide track layer. The main bodies are arranged with spacers at the ends so that both magnetic thin layers face each other to form a space at a certain distance, a light-transmitting moisture-resistant protective layer is provided on both sides of the resulting composite, and the entire body is The sides are sealed with a moisture-resistant sealing material.
(5) 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガ
イドトラツク層を設け、前記ガイドトラツク層
上に磁性薄層を設け、更に前記磁性薄層上に反
射層を設けた２つの本体を、両反射層が相対し
て一定距離空間を形成するように、端部にスペ
ーサーを介して配列せしめ、得られた複合体の
両面に透光性耐湿性保護層を設け、更に全体の
側面を耐湿性封止部材で封じてなるもの。(5) A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and the magnetic thin layer is provided on the guide track layer. Two main bodies each having a reflective layer on a thin layer are arranged with a spacer at the end so that both reflective layers face each other to form a space at a certain distance, and both sides of the resulting composite are transparent. A moisture-resistant protective layer is provided, and the entire side surface is further sealed with a moisture-resistant sealing member.
これら(1)〜(5)の光磁気記録媒体の各一例を第１
〜５図〔夫々(1)〜(5)の記録媒体に対応〕に示す。
図中、１透明プラスチツク基板、２は透光性耐湿
層、３は透光性ガイドトラツク層、４は磁性薄
層、５は耐湿性保護層、５′は透光性耐湿性保護
層、６は反射層、７はスペーサー、８は空間層、
９は耐湿性封止部材である。これらの図から判る
ように１〜３の記録媒体は通常の片面記録型であ
り、４及び５の記録媒体は両面記録型である。 Examples of each of these (1) to (5) magneto-optical recording media are
-5 Figures [corresponding to the recording media (1) to (5), respectively].
In the figure, 1 is a transparent plastic substrate, 2 is a transparent moisture-resistant layer, 3 is a transparent guide track layer, 4 is a magnetic thin layer, 5 is a moisture-resistant protective layer, 5' is a transparent moisture-resistant protective layer, 6 is a reflective layer, 7 is a spacer, 8 is a spatial layer,
9 is a moisture-resistant sealing member. As can be seen from these figures, the recording media 1 to 3 are of the normal single-sided recording type, and the recording media 4 and 5 are of the double-sided recording type.
以上の光磁気記録媒体はいずれも従来と同様な
方法で記録（書込み）、再生（読出し）を行なう
ことができる。即ち書込みは磁性薄層のキユリー
温度又は補償温度近傍における温度変化に対応し
た保磁力の急激な変化特性を利用して行なう。具
体的には２値信号で変調されたレーザー光を前記
薄層に対して照射加熱することにより、磁化の向
きを反転するなどして行なう。一方、読出しはこ
うして反転記録した薄層に対しカー（Kerr）効
果を利用して行なう。具体的にはこの薄層に書込
み時の強度より弱い偏光されたレーザー光を照射
し、磁化の向きに応じて偏光面が回転することを
利用して、その反射光を検光子を通して検出する
と、明暗の２値信号として検出できる。 All of the above-mentioned magneto-optical recording media can be recorded (written) and reproduced (read) in the same manner as conventional methods. That is, writing is performed by utilizing the property of a sudden change in coercive force corresponding to a temperature change near the Curie temperature or compensation temperature of the magnetic thin layer. Specifically, this is accomplished by irradiating and heating the thin layer with a laser beam modulated by a binary signal, thereby reversing the direction of magnetization. On the other hand, readout is performed using the Kerr effect on the thin layer thus invertedly recorded. Specifically, this thin layer is irradiated with polarized laser light that is weaker than the intensity used for writing, and the reflected light is detected through an analyzer using the fact that the plane of polarization rotates depending on the direction of magnetization. It can be detected as a binary signal of brightness and darkness.
透明プラスチツク基板の材料としてはアクリル
樹脂、ポリカーボネート樹脂、ポリエステル樹脂
ポリスルホン樹脂等が用いられる。 Acrylic resin, polycarbonate resin, polyester resin, polysulfone resin, etc. are used as the material for the transparent plastic substrate.
透明プラスチツク基板上に設けられる透光性耐
湿層はプラスチツク基板への空気中の水分の透湿
による磁性薄層の腐食を防止するための層で、シ
リコーンラダーポリマー、弗素化シリコーン樹脂
等のシリコーン樹脂；エポキシ樹脂変性シリコー
ン樹脂、シリコーンモールデイングコンパウンド
（例えばトーレ・シリコン社製のシリコーン樹
脂／エポキシ樹脂）SiO2、SiO、TiO2、SiN等か
らなり、通常、樹脂を用いた場合は塗布法で、ま
た無機材料を用いた場合は蒸着又はスパツタリン
グ法で形成される。厚さは0.1〜600μｍ程度が適
当である。 The light-transmitting moisture-resistant layer provided on the transparent plastic substrate is a layer to prevent corrosion of the magnetic thin layer due to moisture permeation in the air into the plastic substrate, and is made of silicone resin such as silicone ladder polymer or fluorinated silicone resin. ; Consists of epoxy resin-modified silicone resin, silicone molding compound (e.g. silicone resin/epoxy resin manufactured by Toray Silicone Co., Ltd.) SiO 2 , SiO, TiO 2 , SiN, etc. When resin is used, it is usually coated by a coating method. When an inorganic material is used, it is formed by vapor deposition or sputtering. Appropriate thickness is about 0.1 to 600 μm.
透光性耐湿層又はその反対面即ち基板上に設け
られる透光性ガイドトラツク層は情報のない所に
新たに情報信号を記録するためのサーボ用ガイド
トラツク（記録用トラツクと平行して設けられ
る）となる層で、エポキシアクリレート、ポリエ
ステルアクリレート、不飽和ポリエステル等の紫
外線硬化性樹脂を塗布対象面に塗布し、塗布面に
金型を圧着し、その上から又は反対側から紫外線
を照射して硬化せしめることにより、形成され
る。このトラツク層の溝巾は0.4〜2μ程度、また
溝の深さは0.04〜0.1μｍ程度が適当である。 The light-transmitting moisture-resistant layer or the light-transmitting guide track layer provided on the opposite surface, that is, the substrate, is used as a servo guide track (provided in parallel with the recording track) for recording a new information signal in an area where no information exists. ), an ultraviolet curable resin such as epoxy acrylate, polyester acrylate, or unsaturated polyester is applied to the surface to be coated, a mold is pressed onto the coated surface, and ultraviolet rays are irradiated from above or from the opposite side. It is formed by curing. The groove width of this track layer is suitably about 0.4 to 2 .mu.m, and the groove depth is about 0.04 to 0.1 .mu.m.
透光性ガイドトラツク層上に設けられる磁性薄
層は前述のようにしてレーサー光により変調され
た信号を情報として記録するための層で、非晶質
フエリ磁性体、例えばTbFe、GdCo、TbFeCo、
TbGdFe、TbDyFe、GdTbCo、GdFeCo、
GdFeBi、DyFe等や多結晶磁性体、例えば
MnBiCu、MnPtNb等からなり、蒸着又はスパツ
タリング法で形成される。厚さは0.02〜0.5μｍ程
度が適当である。 The magnetic thin layer provided on the transparent guide track layer is a layer for recording the signal modulated by the laser beam as information as described above, and is made of an amorphous ferrimagnetic material such as TbFe, GdCo, TbFeCo,
TbGdFe, TbDyFe, GdTbCo, GdFeCo,
GdFeBi, DyFe, etc. and polycrystalline magnetic materials, e.g.
It is made of MnBiCu, MnPtNb, etc., and is formed by vapor deposition or sputtering. Appropriate thickness is about 0.02 to 0.5 μm.
磁性薄層上に設けられる反射層は磁性薄層を透
過した再生光を反射させて再び磁性薄層を透過さ
せるための層で、この反射層での反射によつて生
じるフアラデー効果を利用して磁性薄層での反射
によるカー効果を助長せしめ、こうしてＳ／Ｎ比
を倍加させることができる。このように反射層は
Al、Ag、Au、Cu、Zn、Sn等の金属からなり、
蒸着又はスパツタリング法で形成される。厚さは
0.05〜0.5μ程度が適当である。 The reflective layer provided on the magnetic thin layer is a layer that reflects the reproduction light that has passed through the magnetic thin layer and transmits it through the magnetic thin layer again. The Kerr effect due to reflection at the magnetic thin layer is promoted, and thus the S/N ratio can be doubled. In this way, the reflective layer
Made of metals such as Al, Ag, Au, Cu, Zn, Sn,
It is formed by vapor deposition or sputtering. The thickness is
Approximately 0.05 to 0.5μ is appropriate.
磁性薄層又は反射層上に設けられる耐湿性保護
層は空気中の水分による表面層の腐食を防止する
ための層で、前述のような透光性耐湿層用の樹脂
及び無機材料；反射層に用いられるように金属材
料；TiN、TaN、AlN、CrN等の他の無機材料
からなり、透光性耐湿層の場合と同様な方法で形
成される。なおこの層は反射層と同じ材料を用い
て形成した場合は反射層ともなる。また第４〜５
図の記録媒体における透光性耐湿性保護層を形成
する場合は透光性耐湿層用の素材が用いられる。 The moisture-resistant protective layer provided on the magnetic thin layer or reflective layer is a layer to prevent corrosion of the surface layer due to moisture in the air, and includes resins and inorganic materials for the translucent moisture-resistant layer as described above; reflective layer It is made of a metallic material such as TiN, TaN, AlN, CrN, and other inorganic materials, and is formed in the same manner as the light-transmitting moisture-resistant layer. Note that this layer also serves as a reflective layer if it is formed using the same material as the reflective layer. Also 4th to 5th
When forming the transparent moisture-resistant protective layer in the recording medium shown in the figure, a material for the transparent moisture-resistant layer is used.
更に第４〜５図の記録媒体の耐湿性封止部材は
記録媒体側面からの空気中の水分の透過又は浸入
による各層の腐食を防止するための部材で、保護
層と同様な材料及び方法で構成され、また形成さ
れるが、その他材料の種類や形状によつては例え
ば注型法（材料として樹脂を用いた場合）や接着
法（シート状材料を用いた場合）等の方法で形成
することができる。厚さ又は巾は特に制限されな
い。なお第４〜５図の記録媒体に用いられるスペ
ーサーは相対する記録媒体の２つの本体を支持す
るための部材で、記録媒体の機能に実質的な影響
を与えないものであればいかなる材料も使用でき
るが、一般には各種樹脂、ガラス等が使用され
る。このようなスペーサーは通常、接着等の方法
で２つの本体の両端に設けられる。大きさも特に
制限ないが、勿論記録媒体の機能に実質的な影響
を与える程、大きなものであつてはならない。ま
た２つの本体と、両端の２つのスペーサーとで形
成される空間層は乾燥空気、不活性ガス雰囲気又
は真空であることが望ましい。 Furthermore, the moisture-resistant sealing member for the recording medium shown in Figures 4 and 5 is a member for preventing corrosion of each layer due to permeation or intrusion of moisture in the air from the side surface of the recording medium, and is made of the same material and method as the protective layer. However, depending on the type and shape of the material, it may be formed by a method such as a casting method (when resin is used as the material) or an adhesive method (when sheet-like material is used). be able to. The thickness or width is not particularly limited. The spacer used in the recording media shown in Figures 4 and 5 is a member to support the two opposing bodies of the recording medium, and any material can be used as long as it does not substantially affect the function of the recording medium. However, various resins, glass, etc. are generally used. Such spacers are usually provided at both ends of the two bodies by a method such as gluing. There is no particular restriction on the size, but of course it must not be so large as to have a substantial effect on the function of the recording medium. Further, it is desirable that the space layer formed by the two main bodies and the two spacers at both ends be in dry air, an inert gas atmosphere, or a vacuum.
効 果
以上の如く本発明によれば透明プラスチツク基
板上に透光性耐湿層を設けることにより、基板〜
磁性薄層間にガイドトラツク層があるにも拘わら
ず、基板側からの透湿による磁性薄層の腐食、従
つてピンホール発生を防止することができるの
で、光磁気特性が劣化するようなことはない。Effects As described above, according to the present invention, by providing a light-transmitting moisture-resistant layer on a transparent plastic substrate,
Even though there is a guide track layer between the magnetic thin layers, corrosion of the magnetic thin layers due to moisture permeation from the substrate side and pinhole generation can be prevented, thereby preventing deterioration of magneto-optical characteristics. There isn't.
以下に本発明を実施例によつて説明する。 The present invention will be explained below with reference to Examples.
実施例 １
アクリル樹脂基板上にシリコーン樹脂（東芝シ
リコーン社製トスガード510）を溶液塗布法によ
り塗布して厚さ100μｍの透光製耐湿層を設け、
その上に紫外線硬化性ポリエステルアクリレート
樹脂を溶液塗布法により塗布し、その上にガイド
トラツク用の溝を有するNi製金型を圧着し、そ
の反対面から紫外線照射を施して前記樹脂を硬化
せしめた後、金型をはずしてトラツク部分の溝巾
が1μｍ、深さが0.08μｍの透光性ガイドトラツク
層を設け、その上にはスパツタリング法により厚
さ1000ÅのTbFe磁性薄層を設け、更にその上に
トスガード510をスピンコーテイング法により塗
布して厚さが300μｍの耐湿性保護層を設け、片
面記録型光磁気記録媒体を作つた。Example 1 A transparent moisture-resistant layer with a thickness of 100 μm was provided on an acrylic resin substrate by applying silicone resin (Tosguard 510 manufactured by Toshiba Silicone Co., Ltd.) using a solution coating method.
An ultraviolet curable polyester acrylate resin was applied thereon by a solution coating method, a Ni mold having a groove for a guide track was pressed onto it, and ultraviolet rays were irradiated from the opposite side to harden the resin. After that, the mold was removed and a translucent guide track layer with a groove width of 1 μm and a depth of 0.08 μm was formed on the track portion, and a TbFe magnetic thin layer with a thickness of 1000 Å was formed on top of it by sputtering. A moisture-resistant protective layer having a thickness of 300 μm was provided by applying Tosgard 510 on top by a spin coating method, thereby producing a single-sided recording type magneto-optical recording medium.
実施例 ２
アクリル樹脂基板上にアルカリ金属珪酸塩（住
友化学製スミセランＰ）を溶液塗布法により塗布
して厚さ50μｍの透光性耐湿層を設け、その上に
実施例１と同様にしてトラツク部分の溝巾が1.6μ
ｍ、深さが0.06μｍのガイドトラツク層を設け、
その上に電子ビーム蒸着法により厚さ2000Åの
GdTbFe磁性薄層をい設け、更にその上にシリコ
ーンラダーポリマーを溶液塗布法により塗布して
厚さが500μｍの耐湿性保護層を設け、片面記録
型光磁気記録媒体を作成した。Example 2 An alkali metal silicate (Sumiceran P manufactured by Sumitomo Chemical Co., Ltd.) was coated on an acrylic resin substrate by a solution coating method to form a light-transmitting and moisture-resistant layer with a thickness of 50 μm. Part groove width is 1.6μ
m, a guide track layer with a depth of 0.06 μm was provided,
On top of that, a film with a thickness of 2000 Å was deposited using the electron beam evaporation method.
A GdTbFe magnetic thin layer was provided, and a moisture-resistant protective layer having a thickness of 500 μm was provided by coating a silicone ladder polymer thereon by a solution coating method, thereby producing a single-sided recording type magneto-optical recording medium.
実施例 ３
アクリル樹脂基板板上にSiNをスパツタリング
して厚さ1μｍの透光性耐湿層を設け、その上に
実施例１と同様にしてトラツク部分の溝巾が2μ
ｍで深さが0.8μｍの透光性ガイドトラツク層を設
け、その上にスパツタリング法により厚さ1000Å
のTbFeCoの磁性薄層を設け、更にその上にSiN
をスパツタリングして厚さ1μｍの耐湿性保護層
を設け、片面記録型光磁気記録媒体を作成した。Example 3 A translucent moisture-resistant layer with a thickness of 1 μm was provided on an acrylic resin substrate by sputtering SiN, and a groove width of 2 μm in the track portion was formed on top of it in the same manner as in Example 1.
A transparent guide track layer with a depth of 0.8 μm is provided, and a layer with a thickness of 1000 Å is deposited on top of it by sputtering.
A magnetic thin layer of TbFeCo is provided, and then SiN is placed on top of that.
A moisture-resistant protective layer with a thickness of 1 μm was provided by sputtering to prepare a single-sided recording type magneto-optical recording medium.
実施例 ４
ポリカーボネート基板上にスミセランＰを溶液
塗布法により塗布して厚さ100μｍの透光性耐湿
層を設け、その反対面に実施例１と同様にしてト
ラツク部分の溝巾が2μｍで深さが1μｍの透光性
ガイドトラツク層を設け、その上に電子ビーム蒸
着法により厚さ1000ÅのMnBiCu磁性薄層を設
け、更にその上にシリコーンモールデイングコン
パウンド用のシリコーン樹脂／エポキシ樹脂（重
量比1/1）混合物を溶液塗布法により塗布して厚
さが500μｍの耐湿性保護層を設け、片面記録型
磁気記録媒体を作成した。Example 4 Sumicelan P was coated on a polycarbonate substrate by a solution coating method to provide a light-transmitting moisture-resistant layer with a thickness of 100 μm, and on the opposite side, a groove width of 2 μm and a depth of track portion was formed in the same manner as in Example 1. A light-transmitting guide track layer with a thickness of 1 μm is provided, and on top of this a MnBiCu magnetic thin layer with a thickness of 1000 Å is provided by electron beam evaporation, and a silicone resin/epoxy resin for silicone molding compound (weight ratio: /1) A moisture-resistant protective layer with a thickness of 500 μm was provided by applying the mixture by a solution coating method to create a single-sided recording type magnetic recording medium.
次に以上の記録媒体を50℃、90％RHの雰囲気
中に10日間放置試験した後の磁性薄層の腐食状態
を１mm2当りのピンホール個数で測定したところ、
下記結果が得られた。なお測定値は10回の平均値
である。また試験前のピンホール個数／mm2も付記
した。 Next, the corrosion state of the magnetic thin layer was measured in terms of the number of pinholes per 1 mm2 after leaving the above recording medium in an atmosphere of 50°C and 90% RH for 10 days.
The following results were obtained. Note that the measured value is the average value of 10 times. The number of pinholes/mm 2 before the test was also noted.
試験前(個数/mm2)試験前(個性/mm2)
実施例１５５
２２２
３３３
４４４
比較例 ３27*
＊ピンホール径も増大
以下の結果から判るように本発明品はいずれも
透光性耐湿層があるため、ピンホールの増大、即
ち腐食は全く認められなかつたのに対し、比較品
は透光性耐湿層がないため、基板側からの水分が
透過してガイドトラツク層中の腐食性物質と相剰
し、その結果、ピンホール数ばかりでなく、ピン
ホールの大きさも増大して腐食が進んでいる。 Before test (number/mm 2 ) Before test (individuality/mm 2 ) Example 155 222 333 444 Comparative example 327 * *Pinhole diameter also increased As can be seen from the results below, all of the products of the present invention have a transparent moisture-resistant layer Because of this, no increase in pinholes or corrosion was observed at all, whereas the comparative product does not have a translucent moisture-resistant layer, so moisture from the substrate side passes through and causes corrosive substances in the guide track layer. As a result, not only the number of pinholes but also the size of the pinholes increases and corrosion progresses.
第１〜３図は本発明の片面記録型光磁気記録媒
体の一例の断面図、第４〜５図は本発明の両面記
録型光磁気記録媒体の一例の断面図である。
１……透明プラスチツク基板、２……透光性耐
湿層、３……透光性ガイドトラツク層、４……磁
性薄層、５……耐湿性保護層、５′……透光性耐
湿性保護層、６……反射層、７……スペーサー、
８……空間層、９……耐湿性封止部材。
1 to 3 are cross-sectional views of an example of a single-sided recording type magneto-optical recording medium of the present invention, and FIGS. 4 to 5 are cross-sectional views of an example of a double-sided recording type magneto-optical recording medium of the present invention. DESCRIPTION OF SYMBOLS 1...Transparent plastic substrate, 2...Transparent moisture-resistant layer, 3...Transparent guide track layer, 4...Magnetic thin layer, 5...Moisture-resistant protective layer, 5'...Transparent moisture-resistant layer Protective layer, 6... Reflective layer, 7... Spacer,
8... Space layer, 9... Moisture-resistant sealing member.
Claims (1)
け、前記耐湿層上に又はその反対面に透光性ガイ
ドトラツク層を設け、更に前記ガイドトラツク層
上に磁性薄層を設けた光磁気記録媒体。 ２ 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガイ
ドトラツク層を設け、前記ガイドトラツク層上に
磁性薄層を設け、更に前記磁性薄層上に耐湿性保
護層又は反射層を設けた光磁気記録媒体。 ３ 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガイ
ドトラツク層を設け、前記ガイドトラツク層上に
磁性薄層を設け、前記磁性薄層上に反射層を設
け、更に前記反射層上に耐湿性保護層を設けた光
磁気記録媒体。 ４ 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガイ
ドトラツク層を設け、更に前記ガイドトラツク層
上に磁性薄層を設けた２つの本体を、両磁性薄層
が相対して一定距離空間を形成するように、端部
にスペーサーを介して配列せしめ、得られた複合
体の両面に透光性耐湿性保護層を設け、更に全体
の側面を耐湿性封止部材で封じてなる光磁気記録
媒体。 ５ 透明プラスチツク基板上に透光性耐湿層を設
け、前記耐湿層上に又はその反対面に透光性ガイ
ドトラツク層を設け、前記ガイドトラツク層上に
磁性薄層を設け、更に前記磁性薄層上に反射層を
設けた２つの本体を、両反射層が相対して一定距
離空間を形成するように、端部にスペーサーを介
して配列せしめ、得られた複合体の両面に透光性
耐湿性保護層を設け、更に全体の側面を耐湿性封
止部材で封じてなる光磁気記録媒体。[Scope of Claims] 1. A light-transmitting moisture-resistant layer is provided on a transparent plastic substrate, a light-transmitting guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, and a magnetic thin layer is further provided on the guide track layer. A magneto-optical recording medium provided. 2. A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and the magnetic thin layer is provided on the guide track layer. A magneto-optical recording medium with a moisture-resistant protective layer or reflective layer on top. 3. A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and a magnetic thin layer is provided on the magnetic thin layer. A magneto-optical recording medium, comprising: a reflective layer; and a moisture-resistant protective layer provided on the reflective layer. 4. Two main bodies comprising a transparent moisture-resistant layer provided on a transparent plastic substrate, a transparent guide track layer provided on the moisture-resistant layer or on the opposite side thereof, and a magnetic thin layer provided on the guide track layer. , both magnetic thin layers are arranged with spacers at the ends so as to form a space at a certain distance from each other, and a light-transmitting and moisture-resistant protective layer is provided on both sides of the resulting composite, and the entire side surface is magneto-optical recording medium sealed with a moisture-resistant sealing member. 5. A transparent moisture-resistant layer is provided on a transparent plastic substrate, a transparent guide track layer is provided on the moisture-resistant layer or on the opposite side thereof, a magnetic thin layer is provided on the guide track layer, and the magnetic thin layer is provided on the guide track layer. Two bodies with reflective layers on top are arranged with spacers at the ends so that both reflective layers face each other to form a space at a certain distance, and both sides of the resulting composite are coated with translucent and moisture-resistant coatings. A magneto-optical recording medium provided with a protective layer and further sealed with a moisture-resistant sealing member on the entire side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16115383A JPS6052944A (en) | 1983-09-01 | 1983-09-01 | Optomagnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16115383A JPS6052944A (en) | 1983-09-01 | 1983-09-01 | Optomagnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6052944A JPS6052944A (en) | 1985-03-26 |
| JPH0463451B2 true JPH0463451B2 (en) | 1992-10-09 |
Family
ID=15729598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16115383A Granted JPS6052944A (en) | 1983-09-01 | 1983-09-01 | Optomagnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6052944A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155450A (en) * | 1986-12-19 | 1988-06-28 | Mitsubishi Kasei Corp | Substrate for magneto-optical recording medium |
| WO1997012279A1 (en) * | 1995-09-29 | 1997-04-03 | Sage Technology, Incorporated | Optical digital media recording and reproduction system |
-
1983
- 1983-09-01 JP JP16115383A patent/JPS6052944A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6052944A (en) | 1985-03-26 |
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