JPH05159366A - Optical information recording medium - Google Patents
Optical information recording mediumInfo
- Publication number
- JPH05159366A JPH05159366A JP3349799A JP34979991A JPH05159366A JP H05159366 A JPH05159366 A JP H05159366A JP 3349799 A JP3349799 A JP 3349799A JP 34979991 A JP34979991 A JP 34979991A JP H05159366 A JPH05159366 A JP H05159366A
- Authority
- JP
- Japan
- Prior art keywords
- film
- recording medium
- optical information
- information recording
- protective 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 30
- 239000010408 film Substances 0.000 claims abstract description 73
- 230000001681 protective effect Effects 0.000 claims abstract description 29
- -1 polysiloxane Polymers 0.000 claims abstract description 16
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 16
- 239000010409 thin film Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 125000003709 fluoroalkyl group Chemical group 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 125000000962 organic group Chemical group 0.000 claims description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 229910017061 Fe Co Inorganic materials 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004528 spin coating Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 229910002059 quaternary alloy Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は光情報記録媒体に係り、
特に、記録膜を腐食性雰囲気から保護するための保護膜
材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium,
In particular, it relates to a protective film material for protecting the recording film from a corrosive atmosphere.
【０００２】[0002]
【従来の技術】図４に、従来より知られている光情報記
録媒体の膜構造の一例を示す。これは、光磁気記録媒体
を示すものであって、透明基板１のプリフォーマットパ
ターン形成面２に、無機誘電体製のエンハンス膜３と、
光磁気記録膜４と、無機誘電体製の無機保護膜５と、ア
ルミニウムなどの金属製の反射膜６とがスパッタリング
によって順次積層されており、これらの薄膜３〜６を覆
うようにして、紫外線硬化性樹脂製の樹脂保護膜７が形
成されている。2. Description of the Related Art FIG. 4 shows an example of a film structure of a conventionally known optical information recording medium. This shows a magneto-optical recording medium, in which a preformat pattern forming surface 2 of a transparent substrate 1 is provided with an enhancement film 3 made of an inorganic dielectric,
A magneto-optical recording film 4, an inorganic protective film 5 made of an inorganic dielectric, and a reflective film 6 made of a metal such as aluminum are sequentially laminated by sputtering, and ultraviolet rays are applied so as to cover these thin films 3 to 6. A resin protective film 7 made of a curable resin is formed.
【０００３】[0003]
【発明が解決しようとする課題】ところが、紫外線硬化
性樹脂は硬化時の反応率が低く、吸水性及び透水性が高
い樹脂材料であり、またアルミニウムのスパッタ薄膜は
多孔質であり、さらに無機誘電体のスパッタ薄膜はピン
ホールなどの欠陥が生じやすいので、前記構造の光情報
記録媒体は、空気中の水分が光磁気記録膜４に達しやす
い。欠陥がない部分及び塩素イオンなどの腐食性物質が
存在しない環境下においては、水分が付着しても光磁気
記録膜４は腐食しにくいが、欠陥部分に水分が付着する
と、そこから光磁気記録膜４の腐食が急速に進行する。
一般に、大面積の透明基板１上に無欠陥の光磁気記録膜
４を形成することは困難であり、一部に欠陥を含む場合
の方がむしろ普通である。このため、前記構造の光情報
記録媒体は、空気中の水分によって光磁気記録膜４が腐
食されやすく、長期保存性が低いという問題がある。However, the ultraviolet curable resin is a resin material having a low reaction rate upon curing, high water absorption and high water permeability, and the sputtered thin film of aluminum is porous, and further, the inorganic dielectric Since the sputtered thin film of the body is apt to cause defects such as pinholes, in the optical information recording medium having the above structure, water in the air easily reaches the magneto-optical recording film 4. In an environment where there are no defects and no corrosive substances such as chlorine ions, the magneto-optical recording film 4 is unlikely to corrode even if moisture adheres, but when moisture adheres to a defective portion, magneto-optical recording starts from there. Corrosion of the film 4 progresses rapidly.
In general, it is difficult to form the defect-free magneto-optical recording film 4 on the large-area transparent substrate 1, and it is more common to partially include a defect. Therefore, the optical information recording medium having the above structure has a problem that the magneto-optical recording film 4 is easily corroded by moisture in the air, and the long-term storage stability is low.
【０００４】本発明は、かかる従来技術の不備を解決す
るためになされたものであって、樹脂保護膜の吸水性及
び透水性を低下せしめて、長期保存性に優れた光情報記
録媒体を提供することを目的とする。The present invention has been made in order to solve the deficiencies of the prior art, and provides an optical information recording medium excellent in long-term storability by reducing the water absorption and water permeability of a resin protective film. The purpose is to do.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記の目的を
達成するため、透明基板の片面に、少なくとも記録膜を
含む１層又は複数層の薄膜を担持してなる光情報記録媒
体において、少なくとも前記薄膜を覆うように、下記の
構造式で表わされる反応性ポリシロキサンを塗布、硬化
させてなる保護膜を設けた。In order to achieve the above object, the present invention provides an optical information recording medium in which one or more thin films including at least a recording film are carried on one surface of a transparent substrate, A protective film formed by coating and curing a reactive polysiloxane represented by the following structural formula was provided so as to cover at least the thin film.
【０００６】 但し、Ｒはメチル基、フェニル基、フロロアルキル基、
アルコキシ基などの有機基である。なお、反応性ポリシ
ロキサンは、粘度の低い液状であるため、スピンコート
法によって前記保護膜を形成することができる。この場
合、前記反応性ポリシロキサン製保護膜は任意の厚さに
形成可能であるが、膜厚の大きな保護膜を形成するため
には、反応性ポリシロキサンのスピンコートと乾燥とを
何度も繰り返さなくてはならず、量産性が悪くなるた
め、３０μｍ以下とすることが特に好ましい。[0006] However, R is a methyl group, a phenyl group, a fluoroalkyl group,
An organic group such as an alkoxy group. Since the reactive polysiloxane is a liquid having a low viscosity, the protective film can be formed by a spin coating method. In this case, the reactive polysiloxane protective film can be formed to have an arbitrary thickness, but in order to form a protective film having a large thickness, spin coating and drying of the reactive polysiloxane are repeated. Since it has to be repeated and mass productivity deteriorates, it is particularly preferable to set the thickness to 30 μm or less.
【０００７】[0007]
【作用】紫外線硬化性樹脂の反応率はせいぜい８０％程
度であるのに対し、反応性ポリシロキサンの反応率は、
９５％近くもある。したがって、反応性ポリシロキサン
製の保護膜は、紫外線硬化性樹脂製の保護膜に比べて吸
水率及び透水率が格段に小さく、仮に透明基板上に担持
された記録膜に欠陥が生じていたとしても、この欠陥部
に空気中の水分が侵入して付着するということが起りに
くく、光情報記録媒体の長期保存性が改善される。Function The reaction rate of the ultraviolet curable resin is about 80% at the most, whereas the reaction rate of the reactive polysiloxane is
Nearly 95%. Therefore, the protective film made of the reactive polysiloxane has a remarkably smaller water absorption rate and water permeability than the protective film made of the ultraviolet curable resin, and it is assumed that the recording film carried on the transparent substrate has a defect. However, it is unlikely that moisture in the air will invade and adhere to the defective portion, and the long-term storage stability of the optical information recording medium will be improved.
【０００８】[0008]
【実施例】以下、本発明の一実施例を、図１及び図２に
基づいて説明する。図１は本例に係る光情報記録媒体の
断面図であり、図２は透明基板に形成されるプリフォー
マットパターンを模式的に示す本例に係る光情報記録媒
体の平面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of the optical information recording medium according to this example, and FIG. 2 is a plan view of the optical information recording medium according to this example schematically showing a preformat pattern formed on a transparent substrate.
【０００９】図１に示すように、本例の光情報記録媒体
は、透明基板１のプリフォーマットパターン形成面２
に、無機誘電体製のエンハンス膜３と、光磁気記録膜４
と、無機誘電体製の無機保護膜５と、金属製の反射膜６
とがスパッタリングによって順次積層されており、これ
らの薄膜３〜６を覆うように、反応性ポリシロキサン製
の保護膜１１が被覆されている。As shown in FIG. 1, the optical information recording medium of this example has a pre-format pattern forming surface 2 of a transparent substrate 1.
In addition, an inorganic dielectric enhancement film 3 and a magneto-optical recording film 4 are provided.
And an inorganic protective film 5 made of an inorganic dielectric material and a reflective film 6 made of a metal.
Are sequentially laminated by sputtering, and a protective film 11 made of reactive polysiloxane is coated so as to cover these thin films 3 to 6.
【００１０】透明基板１は、例えばポリカーボネート、
ポリメチルメタクリレート、ポリメチルペンテン、エポ
キシ、光硬化性樹脂などの透明プラスチック材料をもっ
て、図２に示すように中心部にセンター孔１ａを有する
所望直径の円板状に形成されている。そして、その片面
には、プリフォーマットパターン２が、センター孔１ａ
と同心の渦巻状もしくは同心円状に形成されている。プ
リフォーマットパターン２は、例えば光学ヘッドをトラ
ッキングするための案内溝と、各トラックあるいは各ト
ラックを周方向に等分してなるセクタのアドレスなどを
表示するヘッダー信号や情報信号などを表わすピット列
からなり、前記透明基板２の片面に微細な凹凸の形で形
成される。なお、プリフォーマットパターン２の形状、
寸法、配列、製造方法等については、公知に属する技術
であり、かつ本発明の要旨でもないので、説明を省略す
る。The transparent substrate 1 is made of polycarbonate, for example.
As shown in FIG. 2, a transparent plastic material such as polymethylmethacrylate, polymethylpentene, epoxy, or a photocurable resin is formed into a disk shape having a center hole 1a at the center thereof and having a desired diameter. The pre-format pattern 2 is provided on one side of the center hole 1a.
And a concentric spiral or concentric circle. The pre-format pattern 2 includes, for example, a guide groove for tracking the optical head, and a pit string representing a header signal or an information signal indicating the address of each track or a sector formed by equally dividing each track in the circumferential direction. Then, it is formed on one surface of the transparent substrate 2 in the form of fine irregularities. The shape of the preformat pattern 2,
The dimensions, arrangement, manufacturing method, and the like are known techniques and are not the gist of the present invention.
【００１１】エンハンス膜３は、透明基板１のプリフォ
ーマットパターン２形成面と光磁気記録膜４との間で再
生用レーザビームを多重反射させ、見掛け上のカー回転
角を大きくして大きな再生Ｃ／Ｎ比を得るために設けら
れるものであって、例えばＳｉＯ，ＳｉＯ2 ，ＳｉＮ，
Ｓｉ3 Ｎ4 ，ＡｌＮ，Ａｌ2 Ｏ3 など、再生用レーザビ
ームの屈折率が透明基板１よりもやや大きな無機誘電体
にて形成される。The enhancement film 3 multiple-reflects a reproducing laser beam between the surface of the transparent substrate 1 on which the preformat pattern 2 is formed and the magneto-optical recording film 4, thereby increasing the apparent Kerr rotation angle to achieve a large reproduction C. Is provided in order to obtain the / N ratio, such as SiO, SiO 2 , SiN,
It is formed of an inorganic dielectric material such as Si 3 N 4 , AlN, and Al 2 O 3 whose refractive index of the reproducing laser beam is slightly larger than that of the transparent substrate 1.
【００１２】光磁気記録膜３としては、公知に属する任
意の光磁気記録材料からなるものを用いることができる
が、特に、希土類元素と遷移金属とを主成分とする垂直
磁化膜が好適である。この種の記録材料としては、Ｇｄ
−Ｆｅ，Ｔｂ−Ｆｅ，Ｄｙ−Ｆｅ，Ｇｄ−Ｃｏなどの２
元合金、Ｇｄ−Ｔｂ−Ｆｅ，Ｇｄ−Ｆｅ−Ｃｏ，Ｔｂ−
Ｆｅ−Ｃｏ，Ｄｙ−Ｆｅ−Ｃｏなどの３元合金、Ｇｄ−
Ｔｂ−Ｆｅ−Ｃｏ，Ｔｂ−Ｄｙ−Ｆｅ−Ｃｏなどの４元
合金などがある。The magneto-optical recording film 3 may be made of any known magneto-optical recording material, but a perpendicularly magnetized film containing a rare earth element and a transition metal as main components is particularly preferable. .. As this type of recording material, Gd
2 such as -Fe, Tb-Fe, Dy-Fe, and Gd-Co
Original alloy, Gd-Tb-Fe, Gd-Fe-Co, Tb-
Fe-Co, Dy-Fe-Co and other ternary alloys, Gd-
There are quaternary alloys such as Tb-Fe-Co and Tb-Dy-Fe-Co.
【００１３】無機保護膜５は、光磁気記録膜４を衝撃力
や腐食性雰囲気から保護すると共に、光磁気記録膜４と
反射膜６との間で、光磁気記録膜４を透過した再生用レ
ーザビームを多重反射させ、見掛け上のカー回転角を大
きくして大きな再生Ｃ／Ｎ比を得るために設けられるも
のであって、前記エンハンス膜３と同様の無機誘電体に
て形成される。The inorganic protective film 5 protects the magneto-optical recording film 4 from an impact force and a corrosive atmosphere, and for reproduction between the magneto-optical recording film 4 and the reflective film 6 which is transmitted through the magneto-optical recording film 4. It is provided in order to multiple-reflect the laser beam and increase the apparent Kerr rotation angle to obtain a large reproduction C / N ratio, and is formed of the same inorganic dielectric material as the enhance film 3.
【００１４】反射膜６は、光磁気記録膜４を透過した再
生用レーザビームを透明基板１側に戻し、大きな信号強
度を得るために設けられるものであって、例えばアルミ
ニウム、アルミニウム合金、ステンレス鋼などによって
形成される。The reflection film 6 is provided in order to return the reproducing laser beam transmitted through the magneto-optical recording film 4 to the transparent substrate 1 side and obtain a large signal intensity. For example, aluminum, aluminum alloy, stainless steel. Is formed by
【００１５】保護膜１１は、下記の構造式で表わされる
反応性ポリシロキサンをスピンコートすることによって
形成される。The protective film 11 is formed by spin coating a reactive polysiloxane represented by the following structural formula.
【００１６】 但し、Ｒはメチル基、フェニル基、フロロアルキル基、
アルコキシ基などの有機基である。なお、この保護膜１
１は、好ましくは、３０μｍ以下の膜厚に形成される。
その理由は、膜厚の大きな保護膜１１を形成するために
は、反応性ポリシロキサンのスピンコートと乾燥とを何
度も繰り返さなくてはならず、量産性が悪くなるためで
ある。また、この保護膜１１を構成する反応性ポリシロ
キサンとしては、水蒸気透過率が１．０ｍｇ／ｃｍ2 ／
ｍｍ・２４ｈｒ以下のものが特に好適である。[0016] However, R is a methyl group, a phenyl group, a fluoroalkyl group,
An organic group such as an alkoxy group. In addition, this protective film 1
1 is preferably formed to have a film thickness of 30 μm or less.
The reason is that spin coating and drying of the reactive polysiloxane must be repeated many times in order to form the protective film 11 having a large film thickness, resulting in poor mass productivity. The reactive polysiloxane forming the protective film 11 has a water vapor permeability of 1.0 mg / cm 2 /
Those of mm · 24 hr or less are particularly suitable.
【００１７】以下に、本発明の実験例を掲げて、本発明
の効果を明らかにする。透明基板１のプリフォーマット
パターン形成面２に、無機誘電体製のエンハンス膜３と
光磁気記録膜４と無機誘電体製の無機保護膜５と金属製
の反射膜６とを順次スパッタ成膜した後に、反応性ポ
リシロキサン（東レ・ダウコーニング・シリコーン株式
会社製のＳＲ２４１０）を３０μｍの厚さにスピンコー
トし、８０℃の炉中で３時間加熱硬化した光記録単板
と、紫外線硬化性樹脂製の保護膜を５０μｍの厚さに
形成した光記録単板とを用意した。しかる後に、同種の
光記録単板どうしをホットメルト接着剤を介して貼り合
わせ、両面記録形の光磁気記録媒体を作製した。これら
の光磁気記録媒体を、気温が８０℃、相対湿度が９０％
の環境下に３０００時間放置した後、取りだして再生Ｃ
／Ｎ比の測定と腐食の有無の検査とを行なったところ、
従来技術に係る前記の光情報記録媒体については、再
生Ｃ／Ｎ比が３０％低下し、かつ光磁気記録膜４の一部
に腐食が認められたのに対し、本発明に係る前記の光
情報記録媒体については、再生Ｃ／Ｎ比の劣化及び腐食
が共に認められず、本発明に係る光情報記録媒体には、
腐食性雰囲気に対する高い保護効果があることが分かっ
た。The effects of the present invention will be clarified below with reference to experimental examples of the present invention. An inorganic dielectric enhancement film 3, a magneto-optical recording film 4, an inorganic dielectric inorganic protection film 5, and a metal reflection film 6 were sequentially sputtered on the preformat pattern forming surface 2 of the transparent substrate 1. After that, reactive polysiloxane (SR2410 manufactured by Toray Dow Corning Silicone Co., Ltd.) was spin-coated to a thickness of 30 μm, and the optical recording veneer was cured by heating in an oven at 80 ° C. for 3 hours, and an ultraviolet curable resin. An optical recording veneer having a protective film formed to a thickness of 50 μm was prepared. Thereafter, optical recording veneers of the same kind were bonded together via a hot melt adhesive to prepare a double-sided recording type magneto-optical recording medium. These magneto-optical recording media have a temperature of 80 ° C and a relative humidity of 90%.
After leaving it for 3000 hours in the environment, take it out and regenerate it.
After measuring the / N ratio and inspecting for corrosion,
In the above-mentioned optical information recording medium according to the prior art, the reproduction C / N ratio was reduced by 30%, and a part of the magneto-optical recording film 4 was observed to be corroded. Regarding the information recording medium, neither deterioration of the reproduction C / N ratio nor corrosion was observed, and the optical information recording medium according to the present invention is
It was found to have a high protective effect against corrosive atmospheres.
【００１８】なお、前記実施例においては、光情報記録
媒体の記録膜形成面側のみに保護膜１１を被覆したが、
透明基板１が例えばポリカーボネートのような吸湿性及
び透水性が高い物質をもって構成される場合には、図３
に示すように、光記録単板全体を保護膜１１にて覆うこ
ともできる。また、本発明の要旨は、記録膜を保護する
保護層の材質にあるのであって、基板の形状や材質、プ
リフォーマットパターンの構成、それに記録膜の材質や
配列等については、前記実施例に拘らず、適宜設計する
ことができる。例えば、前記実施例においては、ディス
ク状光情報記録媒体を例にとって説明したが、カード状
又はテープ状など、他の形状の光情報記録媒体にも応用
できる。In the above embodiment, the protective film 11 is coated only on the recording film forming surface side of the optical information recording medium.
When the transparent substrate 1 is made of a substance having high hygroscopicity and water permeability, such as polycarbonate, as shown in FIG.
As shown in, the entire optical recording veneer can be covered with the protective film 11. Further, the gist of the present invention lies in the material of the protective layer that protects the recording film, and the shape and material of the substrate, the configuration of the preformat pattern, and the material and arrangement of the recording film are the same as those in the above-mentioned embodiment. Regardless, it can be designed appropriately. For example, in the above embodiment, the disk-shaped optical information recording medium has been described as an example, but the present invention can be applied to optical information recording media having other shapes such as a card shape or a tape shape.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によると、
吸水性及び透水性が低い反応性ポリシロキサンを用いて
保護膜を形成したので、保護膜の吸水及び透水に起因す
る記録膜の腐食を低減でき、光情報記録媒体の長期保存
性を向上することができる。As described above, according to the present invention,
Since the protective film is formed using a reactive polysiloxane having low water absorption and water permeability, corrosion of the recording film due to water absorption and water permeability of the protective film can be reduced, and the long-term storage stability of the optical information recording medium can be improved. You can
【図１】本発明に係る光情報記録媒体の膜構造の一例を
示す断面図である。FIG. 1 is a sectional view showing an example of a film structure of an optical information recording medium according to the present invention.
【図２】本発明に係る光情報記録媒体の平面図である。FIG. 2 is a plan view of an optical information recording medium according to the present invention.
【図３】本発明の他の実施例を示す断面図である。FIG. 3 is a sectional view showing another embodiment of the present invention.
【図４】従来例に係る光情報記録媒体の膜構造の一例を
示す断面図である。FIG. 4 is a cross-sectional view showing an example of a film structure of an optical information recording medium according to a conventional example.
１ 透明基板 ２ プリフォーマットパターン形成面 ３ 無機誘電体製のエンハンス膜 ４ 光磁気記録膜 ５ 無機誘電体製の無機保護 ６ 金属製の反射膜 １１ 保護膜 1 Transparent Substrate 2 Preformat Pattern Forming Surface 3 Inorganic Dielectric Enhance Film 4 Magneto-Optical Recording Film 5 Inorganic Dielectric Inorganic Protection 6 Metal Reflective Film 11 Protective Film
Claims (2)
含む１層又は複数層の薄膜を担持してなる光情報記録媒
体において、少なくとも前記薄膜を覆うように、下記の
構造式で表わされる反応性ポリシロキサンを塗布、硬化
させてなる保護膜を設けたことを特徴とする光情報記録
媒体。 但し、Ｒはメチル基、フェニル基、フロロアルキル基、
アルコキシ基などの有機基である。1. An optical information recording medium comprising one or more thin films containing at least a recording film on one surface of a transparent substrate, and a reaction represented by the following structural formula so as to cover at least the thin film. An optical information recording medium, comprising a protective film formed by coating and curing a hydrophilic polysiloxane. However, R is a methyl group, a phenyl group, a fluoroalkyl group,
An organic group such as an alkoxy group.
ロキサン製保護膜の膜厚を３０μｍ以下に調整したこと
を特徴とする光情報記録媒体。2. The optical information recording medium according to claim 1, wherein the film thickness of the protective film made of reactive polysiloxane is adjusted to 30 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3349799A JPH05159366A (en) | 1991-12-10 | 1991-12-10 | Optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3349799A JPH05159366A (en) | 1991-12-10 | 1991-12-10 | Optical information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05159366A true JPH05159366A (en) | 1993-06-25 |
Family
ID=18406196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3349799A Pending JPH05159366A (en) | 1991-12-10 | 1991-12-10 | Optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05159366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006004055A1 (en) * | 2004-07-02 | 2006-01-12 | Matsushita Electric Industrial Co., Ltd. | Optical disc |
-
1991
- 1991-12-10 JP JP3349799A patent/JPH05159366A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006004055A1 (en) * | 2004-07-02 | 2006-01-12 | Matsushita Electric Industrial Co., Ltd. | Optical disc |
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