JPS62189651A - Photomagnetic recording medium - Google Patents
Photomagnetic recording mediumInfo
- Publication number
- JPS62189651A JPS62189651A JP3052886A JP3052886A JPS62189651A JP S62189651 A JPS62189651 A JP S62189651A JP 3052886 A JP3052886 A JP 3052886A JP 3052886 A JP3052886 A JP 3052886A JP S62189651 A JPS62189651 A JP S62189651A
- Authority
- JP
- Japan
- Prior art keywords
- film
- magneto
- optical recording
- protective film
- radiation
- 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
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 150000001768 cations Chemical class 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 11
- -1 hexafluorophosphate Chemical compound 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- FQYUMYWMJTYZTK-UHFFFAOYSA-N Phenyl glycidyl ether Chemical compound C1OC1COC1=CC=CC=C1 FQYUMYWMJTYZTK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000012954 diazonium Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002546 FeCo Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- COOHOWQDLFSNFC-UHFFFAOYSA-N bis(oxiran-2-ylmethyl) 3,4,5,6-tetrafluorobenzene-1,2-dicarboxylate Chemical compound C1OC1COC(=O)C1=C(F)C(F)=C(F)C(F)=C1C(=O)OCC1CO1 COOHOWQDLFSNFC-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 1
- 238000010538 cationic polymerization reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000001989 diazonium salts Chemical class 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-O diazynium Chemical compound [NH+]#N IJGRMHOSHXDMSA-UHFFFAOYSA-O 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical class I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
イ、産業上の利用分野
本発明は光磁気記録媒体、特に磁気光学記憶素子に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a magneto-optical recording medium, particularly a magneto-optical storage element.
口、従来技術
光ディスクは、高密度、大容量、高速アクセスの特徴を
持ち、種々の研究開発が行われている。Prior Art Optical disks are characterized by high density, large capacity, and high speed access, and various research and development efforts are being conducted on them.
このうち、一度だけ追加記憶できる光ディスクの記録媒
体としては、ＴｅＯｘ、ＴｅＣｂ Ｔｅ−３ｎ−５ｅ等
が知られ、一部商品化されている。Among these, TeOx, TeCb Te-3n-5e, and the like are known as optical disk recording media that allow additional storage only once, and some of them have been commercialized.
一方、書き換えが可能である光記録としては、レーザー
による光磁気記録が注目されている。On the other hand, as a type of rewritable optical recording, magneto-optical recording using a laser is attracting attention.
光磁気記録媒体、例えば光ディスクとしては、ガラスや
プラスチックの透明基板上に、Ｓｍ。As a magneto-optical recording medium, for example, an optical disk, Sm.
Ｅｕ −、Ｇ ｄ ％ Ｔ ｂ −、Ｄ ｙ ％ Ｈｏ
、Ｅ ｒなどの希土類と、Ｆｅ、Ｃｏ、Ｎｉ等の遷移
金属との磁性合金膜をスパッタリングや蒸着などの手段
によりアモルファス状に形成し、更に耐擦傷性を与える
ために有機の保護膜を塗布したものがある。この保護膜
には種々のものが用いられるが、そのなかでも、紫外線
などの放射線で硬化する無溶剤性の塗用いられている。Eu −, G d % T b −, D y % Ho
A magnetic alloy film of rare earth elements such as , Er, and transition metals such as Fe, Co, and Ni is formed into an amorphous form by means such as sputtering or vapor deposition, and an organic protective film is applied to provide further scratch resistance. There is something I did. Various types of protective films are used, but among them, solvent-free coatings that are cured by radiation such as ultraviolet rays are used.
コンパクトディスクの場合は、反射膜としてＡｆを用い
ているが、光磁気媒体で用いられる金属はＡｆよりもは
るかに酸化しやすく、大気中の酸素や水分で容易に劣・
化し、情報記録媒体としての用をなさない。このため、
ＡｆＮ −、Ｓ ｉ ３ Ｎ ＋などの無機の透明誘電
体膜によって磁性層をサンドインチするなどの方法がと
られているが、有機の保護膜自体に酸素や水分を通しに
くいものを用いれば、より一層効果的であることは明白
である。In the case of compact discs, Af is used as a reflective film, but the metal used in magneto-optical media is much more easily oxidized than Af, and is easily degraded by oxygen and moisture in the atmosphere.
and becomes useless as an information recording medium. For this reason,
Methods such as sandwiching the magnetic layer with an inorganic transparent dielectric film such as AfN − or Si 3 N + have been used, but if an organic protective film itself that does not allow oxygen or moisture to pass through is used, It is clear that it is even more effective.
の防食性はほとんどないことがわかった。It was found that there is almost no anti-corrosion property.
ハ１発明の目的
本発明の目的は、防食性に優れ、耐擦傷性等も良好な保
護膜を有する光磁気記録媒体を提供することにある。C.1 Objective of the Invention An object of the present invention is to provide a magneto-optical recording medium having a protective film with excellent corrosion resistance and good scratch resistance.
二０発明の構成及びその作用効果
即ち、本発明は、光磁気記録層の保護膜として、カチオ
ン重合性の放射線硬化樹脂膜が設けられている光磁気記
録媒体に係るものである。20. Structure of the invention and its effects, that is, the present invention relates to a magneto-optical recording medium in which a cationically polymerizable radiation-curable resin film is provided as a protective film of a magneto-optical recording layer.
本発明によれば、保護膜をカチオン重合性の放射線（特
に紫外線）硬化樹脂膜で形成しているので、従来のラジ
カル重合型のものに比べて酸素や水分の浸透を十分に阻
止することができ、防食性を向上させることができる。According to the present invention, since the protective film is formed of a cationic polymerizable radiation (especially ultraviolet ray) cured resin film, it is more effective in blocking the penetration of oxygen and moisture than conventional radical polymerization type. Corrosion resistance can be improved.
しかも、上記保護膜は擦傷にも強く、また塗料を塗布す
ることによって形成可能であって記録層への密着性が良
く、製膜の作業性も良好となる。In addition, the protective film is resistant to scratches, can be formed by applying a paint, has good adhesion to the recording layer, and has good film-forming workability.
本発明において、上記放射線硬化樹脂は、主成分として
樹脂とカチオン重合開始剤を含む。樹脂としてはエポキ
シ樹脂がよく、例えばビスフェノールＡや、多官能アル
コールとエピクロルヒドリンから得られるポリグリシジ
ルエーテルが主に用いられる。他に使用可能な樹脂とし
ては、フェノールグリシジルエーテル、エポキシシクロ
へキシルメチル−エポキシシクロへキシルカルボキシレ
ート、ジグリシジルテトラフルオロフタレートなどのモ
ノマー及びオリゴマーが挙げられる。また、重合開始剤
としては、特公昭４９−１７０４０号、同５２−１４２
７７号、同５２−１４２７８号、同５２−１４２７９号
公報に記載されているジアゾニウム塩、スルホニウム塩
、ヨードニウム塩などの錯体が挙げられる。In the present invention, the radiation-curable resin contains a resin and a cationic polymerization initiator as main components. The resin is preferably an epoxy resin, and for example, bisphenol A or polyglycidyl ether obtained from a polyfunctional alcohol and epichlorohydrin is mainly used. Other resins that can be used include monomers and oligomers such as phenol glycidyl ether, epoxycyclohexylmethyl-epoxycyclohexylcarboxylate, diglycidyl tetrafluorophthalate, and the like. In addition, as a polymerization initiator, Japanese Patent Publication Nos. 49-17040 and 52-142
Examples include complexes such as diazonium salts, sulfonium salts, and iodonium salts described in No. 77, No. 52-14278, and No. 52-14279.
具体的には、メトキシベンゼン、ジアゾニウムへキサフ
ルオロフォスフェート、ジフェニルヨードニウムへキサ
フルオロフタレート、トリフェニルスルホニウムへキサ
フルオロフォスフェートが挙げられる。ただし、これら
の開始剤が硬化した膜中に残ると逆に腐蝕の原因になる
こともあるので、その選定には注意を要する。Specific examples include methoxybenzene, diazonium hexafluorophosphate, diphenyliodonium hexafluorophthalate, and triphenylsulfonium hexafluorophosphate. However, if these initiators remain in the cured film, they may cause corrosion, so care must be taken in selecting them.
次に、保護膜塗料の塗布には、一般的にスピンコードが
用いられる。この際、樹脂液中に気泡が存在していると
、スピンコードしたときに直径数百μｍから数十μｍ程
度の欠陥を発生させる。このため、塗布装置の液供給系
に脱泡装置を組み込むことが行われるが、樹脂中にも、
゛その性能を劣化させない範囲で消泡剤を含有させる方
法も有効であり、主としてシリコン系消泡剤などが０．
５〜３重量％の範囲で用いられる。Next, a spin cord is generally used to apply the protective film paint. At this time, if bubbles are present in the resin liquid, defects with a diameter of several hundred μm to several tens of μm will be generated when spin-coding is performed. For this reason, a defoaming device is incorporated into the liquid supply system of the coating device, but even in the resin,
゛It is also effective to include an antifoaming agent within a range that does not deteriorate its performance, and silicone antifoaming agents are mainly used.
It is used in a range of 5 to 3% by weight.
また、上記光磁気記録層は、膜面に垂直方向に磁化容易
軸を有するものであって、光ビームによって情報の記録
、再生又は消去が可能であり、公知の材質、即ちＴ ｂ
Ｆ ｅ ％ Ｇ ｄ Ｆ ｅ ％ Ｇ ｄ Ｔ ｂ
Ｆ ｅ Ｃｏ、ＣｄＣｏ等の希土類−遷移全屈アモルフ
ァス合金で構成することができる。その製膜には、公知
のようにスパッタリングを採用してよい。The magneto-optical recording layer has an axis of easy magnetization perpendicular to the film surface, can record, reproduce, or erase information with a light beam, and is made of a known material, ie, T b
Fe % G d Fe % G d T b
It can be composed of a rare earth-transition fully bent amorphous alloy such as FeCo or CdCo. Sputtering, as is well known, may be used for forming the film.
また、この光磁気記録層上には、誘電体膜が設けられて
もよいが、こうした誘電体としては、Ｓ ｉ ３ Ｎ
４をはじめＡｊｌ！Ｎ、ＳｉＯ２、Ｚ ｎ Ｓ ％Ｉ
Ｔｏ （Ｉｎｄｉｕｍ Ｔｉｎ ０ｘｉｄｅ）等が挙げ
られる。この誘電体膜はスパッタリングによって光磁気
記録層上に積層して設けることもできるが、光磁気記録
層と基板の間にも設けて、光磁気記録層を誘電体でサン
ドインチした構造としてもよい。Further, a dielectric film may be provided on this magneto-optical recording layer, but such a dielectric film may include Si 3 N
4 and other Ajl! N, SiO2, Z n S %I
Examples include To (Indium Tin Oxide). This dielectric film can be provided by being laminated on the magneto-optical recording layer by sputtering, but it may also be provided between the magneto-optical recording layer and the substrate, so that the magneto-optical recording layer is sandwiched with a dielectric material. .
また、基板の構成材料は種々のものが採用可能であるが
、ポリエチレンテレフタレート、ポリ塩化ビニル、三酢
酸セルロース、ポリカーボネート、ポリイミド、ポリア
ミド、ポリメチルメタクリレートの如きプラスチックス
がある。ガラス等、セラミックス等からなる基板も使用
可能である。或いは金属基板も使用してもよい。基板又
は基体の形状はシート、カード、ディスク、ドラムの他
、 ゛長尺テープ状でもよい。Various materials can be used for the substrate, including plastics such as polyethylene terephthalate, polyvinyl chloride, cellulose triacetate, polycarbonate, polyimide, polyamide, and polymethyl methacrylate. Substrates made of glass, ceramics, etc. can also be used. Alternatively, a metal substrate may also be used. The shape of the substrate or substrate may be a sheet, a card, a disk, a drum, or a long tape.
第１図は、基板１上に、光磁気記録層２と上記保護膜３
とが順次積層された、本発明に基づく光磁気記録媒体の
一例を示すものである。ここで゛、各層の厚みは、光磁
気記録層２が１０００〜１５００人、保護膜（カチオン
重合性の紫外線硬化樹脂層）３が３００〜６００人であ
るのがよい。なお、紫外線硬化樹脂層の防食性能の評価
としては、ガラス基板上に成膜したＧ ｄ Ｔ ｂ Ｆ
ｅ膜に同樹脂をスピンコードして硬化させ、樹脂層側
から測定したカー回転角（θｋ）の、高温多湿中での経
時変化で行うことができる。FIG. 1 shows a magneto-optical recording layer 2 and the above-mentioned protective film 3 on a substrate 1.
1 shows an example of a magneto-optical recording medium based on the present invention in which the following are sequentially laminated. Here, the thickness of each layer is preferably 1,000 to 1,500 for the magneto-optical recording layer 2 and 300 to 600 for the protective film (cationically polymerizable ultraviolet curing resin layer) 3. In addition, as an evaluation of the anticorrosion performance of the ultraviolet curable resin layer, G d T b F film formed on a glass substrate was evaluated.
This can be done by spin-coding the same resin onto the e-film and curing it, and observing the change over time of the Kerr rotation angle (θk) measured from the resin layer side in a high temperature and high humidity environment.
ホ、実施例 以下、本発明を実施例について更に詳細に説明する。E, Example Hereinafter, the present invention will be explained in more detail with reference to Examples.
実誰班
ガラス基板上に、ｃ ｄＴ ｂ Ｆ ｅ 膜を１０００
人スパッタリングで成膜し、この上に、下記組成のカチ
オン重合性紫外線硬化樹脂をスピンコードして硬化させ
、６０℃、８０％ＲＨ中でのθに変化を測定した。A 1000% c dT b Fe film was deposited on a glass substrate.
A film was formed by manual sputtering, and a cationically polymerizable ultraviolet curable resin having the composition shown below was spin-coated and cured, and the change in θ at 60° C. and 80% RH was measured.
フェノールグリシジルエーテル ３０−１％３．
４−エポキシシクロへキシル−
３’、 ４’−エポキシシクロヘキサンカルボキシレ
ート ４０−ｔ％１．４−ブタンジ
オールジクリシジ
ルエーテル ２８ｗ ｔ％メト
キシベンゼンジアゾニウムヘキ
サフルオロフォスフェート ２ｗｔ％且漣旧
舛
ガラス基板上に、ＧｄＴｂＦｅ膜を１０００人スパッタ
リングで成膜し、この上に、アクリレート系のラジカル
重合型紫外線硬化樹脂である大日本インキ社製５Ｄ−１
７をスピンコードして硬化させ、同じくθにの変化をみ
た。Phenol glycidyl ether 30-1%3.
4-Epoxycyclohexyl-3',4'-epoxycyclohexanecarboxylate 40-t%1.4-butanediol dicrycidyl ether 28wt%methoxybenzenediazonium hexafluorophosphate 2wt%and on old glass substrate , a GdTbFe film was formed by sputtering with 1,000 people, and 5D-1 made by Dainippon Ink Co., Ltd., which is an acrylate-based radical polymerization type ultraviolet curable resin, was deposited on top of it.
7 was spin-coded and cured, and the change in θ was also observed.
以上の結果を第２図に示したが、実施例では９００時間
後のθには０．４２から０．３４に変化したが、比較例
では３００時間で０．２２まで下がり、９００時間後は
全くθｋが測定できなかった。The above results are shown in Figure 2. In the example, θ changed from 0.42 to 0.34 after 900 hours, but in the comparative example, it decreased to 0.22 after 300 hours, and after 900 hours, θ changed from 0.42 to 0.34. θk could not be measured at all.
このように、カチオン重合型の紫外線硬化樹脂では、光
磁気記録層に対する高い防食性能がｉｑられる。In this way, the cationic polymerizable ultraviolet curable resin has high anticorrosion performance for the magneto-optical recording layer.
以上、本発明を例示したが、上述の例は本発明の技術的
思想に基づいて更に変形可能である。Although the present invention has been illustrated above, the above-mentioned example can be further modified based on the technical idea of the present invention.
図面は本発明の実施例を示すものであって、第１図は光
磁気記録媒体の断面図、
第２図は耐腐蝕試験の結果を比較して示すグラフ
である。
なお、図面に示す符号において、
１・・・・・・・・・基板
２・・・・・・・・・光磁気記録層
３・・・・・・・・・保護膜
である。The drawings show examples of the present invention, and FIG. 1 is a cross-sectional view of a magneto-optical recording medium, and FIG. 2 is a graph showing a comparison of the results of a corrosion resistance test. In addition, in the reference numerals shown in the drawings, 1...Substrate 2...Magneto-optical recording layer 3...Protective film.
Claims (1)
射線硬化樹脂膜が設けられている光磁気記録媒体。1. A magneto-optical recording medium in which a cationically polymerizable radiation-curable resin film is provided as a protective film for a magneto-optical recording layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3052886A JPS62189651A (en) | 1986-02-14 | 1986-02-14 | Photomagnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3052886A JPS62189651A (en) | 1986-02-14 | 1986-02-14 | Photomagnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62189651A true JPS62189651A (en) | 1987-08-19 |
Family
ID=12306302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3052886A Pending JPS62189651A (en) | 1986-02-14 | 1986-02-14 | Photomagnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62189651A (en) |
-
1986
- 1986-02-14 JP JP3052886A patent/JPS62189651A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60177449A (en) | Optical type information recording carrier | |
| JPS62189651A (en) | Photomagnetic recording medium | |
| JPS61144744A (en) | Optomagnetic recording medium and its production | |
| JPH04364248A (en) | Optical disk | |
| JPH01112539A (en) | Optical recording medium | |
| JP3295119B2 (en) | Magneto-optical recording medium | |
| JPH01269258A (en) | Optical recording medium | |
| JP2606729B2 (en) | Magneto-optical recording medium | |
| JP3491340B2 (en) | Magneto-optical recording medium | |
| JPS6052944A (en) | Optomagnetic recording medium | |
| JP2789101B2 (en) | optical disk | |
| JP2940215B2 (en) | Magneto-optical recording medium | |
| JPH02239447A (en) | Magneto-optical recording medium | |
| JPS62281143A (en) | Magneto-optical recording medium | |
| JPH05189802A (en) | Optical information recording medium | |
| JPS6159641A (en) | Recording medium | |
| JPH05159366A (en) | Optical information recording medium | |
| JPS63197041A (en) | Optical recording medium and its production | |
| JPH02137148A (en) | Magneto-optical recording medium | |
| JPS6238544A (en) | Photomagnetic recording medium | |
| JPH01112547A (en) | Optical memory medium | |
| JPH03237635A (en) | Magneto-optical recording medium | |
| JPS63200335A (en) | Optical recording medium | |
| JPS63257939A (en) | Protective coating agent for magneto-optical disk | |
| JPH01256048A (en) | Magneto-optical recording medium |