JPH08124216A - Optical information recording medium - Google Patents

Optical information recording medium

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Publication number
JPH08124216A
JPH08124216A JP6282614A JP28261494A JPH08124216A JP H08124216 A JPH08124216 A JP H08124216A JP 6282614 A JP6282614 A JP 6282614A JP 28261494 A JP28261494 A JP 28261494A JP H08124216 A JPH08124216 A JP H08124216A
Authority
JP
Japan
Prior art keywords
layer
organic resin
substrate
recording medium
optical information
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
Application number
JP6282614A
Other languages
Japanese (ja)
Inventor
Masahiro Masuzawa
正弘 升澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6282614A priority Critical patent/JPH08124216A/en
Publication of JPH08124216A publication Critical patent/JPH08124216A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To enhance hardness, weatherability, moisture resistance, adhesion, writing performance, etc., by laminating more than one organic resin film having different characteristics on the laser light incident side of a substrate and/or the opposite side thereof. CONSTITUTION: A hard coat layer 2 of an organic resin laminate is provided on the laser light incident side of a substrate 1 having the opposite side provided with a dielectric layer 4, at recording layer 5, a dielectric layer 4, and a reflective film 6. An overcoat layer 3 of organic resin film is provided on the film 6 where the layer 2 comprises first and second layers 21, 22 of organic resin film. The layer 21 has lower permittivity than the layer 22 and has resistivity of 1×10<13> Ωcm or less and the layer 22 has higher weatherability, moisture resistance and hardness than the layer 21. The layers 4, 4' are composed of SiO2 , SiN, etc., the layer 5 is composed of TbFeCo or the like, and the film 6 is composed of Al, AlTi, etc. This structure enhances hardness, weatherability, moisture resistance, dustproofness, adhesion and writing performance.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明はレーザなどの光により情
報の記録・再生などを行なう光情報記録媒体に関し、特
に保護能力の向上した光情報記録媒体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium for recording / reproducing information with light from a laser or the like, and more particularly to an optical information recording medium having an improved protection capability.

【０００２】[0002]

【従来技術】従来、光ディスクにおいて、基板表面の傷
つき防止あるいは記録膜、誘電体膜及び反射膜の酸化、
腐食防止のため、有機樹脂膜が基板のレーザ光入射面側
あるいは記録膜、誘電体膜及び反射膜の表面にコーティ
ングされている。一般にこれらの有機樹脂は、スピンコ
ートにより塗布し、紫外線により硬化させる紫外線硬化
樹脂を使用することが多い。2. Description of the Related Art Conventionally, in an optical disc, damage prevention on a substrate surface or oxidation of a recording film, a dielectric film and a reflective film,
To prevent corrosion, an organic resin film is coated on the laser light incident surface side of the substrate or on the surfaces of the recording film, the dielectric film and the reflective film. Generally, for these organic resins, an ultraviolet curable resin which is applied by spin coating and cured by ultraviolet rays is often used.

【０００３】この紫外線硬化樹脂は、使用する目的によ
り、硬化後要求される特性が異なってくる。例えば、基
板表面の傷つき防止（一般にハードコートと呼ばれる）
のためには、表面硬化が大きく、情報の記録あるいは再
生に使用するレーザ光の波長に対し透明であり、基板と
の密着性がすぐれていて、耐候性、耐湿性もすぐれてな
ければならない。記録膜、誘電体膜及び反射膜の酸化、
腐食防止（一般にオーバーコートと呼ばれる）のために
は、記録膜、誘電体膜及び反射膜との密着性がよく、表
面硬度が大きく、耐候性、耐湿性もすぐれてなければな
らない。このような従来の特性に加え、ハードコートの
場合は防塵効果を大きくするため表面抵抗値を小さくし
帯電しにくくしたり、オーバーコートの場合は、水性イ
ンクによる筆記を可能にするため、吸水性を大きくする
必要もでてきた。The properties required for this ultraviolet curable resin after curing differ depending on the purpose for which it is used. For example, to prevent scratches on the substrate surface (generally called hard coat)
For this purpose, the surface must be hardened, must be transparent to the wavelength of the laser beam used for recording or reproducing information, have good adhesion to the substrate, and have excellent weather resistance and moisture resistance. Oxidation of recording film, dielectric film and reflective film,
In order to prevent corrosion (generally referred to as an overcoat), it must have good adhesion to a recording film, a dielectric film and a reflective film, have a large surface hardness, and have excellent weather resistance and moisture resistance. In addition to such conventional characteristics, in the case of hard coat, the surface resistance value is reduced to increase the dustproof effect to make it difficult to be charged, and in the case of overcoat, writing with a water-based ink is made possible so that water absorption It has become necessary to increase the.

【０００４】ハードコートの場合、表面抵抗値を小さく
するためには、紫外線硬化樹脂中に金属フィラーを分散
させたり（例えば、特開平４−２５１４４８号公報に
は、保護層に導電性フィラーを添加することにより、フ
ライングヘッドの吸着を防止すると共に塵埃の付着を防
止するということが提案されている）、紫外線硬化樹脂
そのものに導電性をもたせている。In the case of a hard coat, in order to reduce the surface resistance value, a metal filler is dispersed in an ultraviolet curable resin (for example, in JP-A-4-251448, a conductive filler is added to a protective layer. By doing so, it has been proposed to prevent the flying head from adsorbing and to prevent dust from adhering), and the ultraviolet curable resin itself has conductivity.

【０００５】[0005]

【発明が解決しようとする課題】ところが、一般的に上
記のような紫外線硬化は、耐候性、耐湿性と導電性の両
立はむずかしい。というのは、金属フィラーが酸化、腐
食したり、導電性をもたせるため紫外線硬化樹脂に親水
基をもたせ、表面に吸着した水の導電性を利用するた
め、水を吸収しやすく耐湿性が弱くなるからである。オ
ーバーコートの場合も、耐候性、耐湿性と水性インクに
よる筆記性を両立させることがむずかしい。However, in general, it is difficult to achieve both weather resistance, moisture resistance and conductivity in the above-mentioned ultraviolet curing. This is because the metal filler oxidizes, corrodes, and has a hydrophilic group on the UV curable resin to make it conductive and uses the conductivity of the water adsorbed on the surface, making it easier to absorb water and weaker in moisture resistance. Because. Also in the case of an overcoat, it is difficult to achieve both weather resistance, moisture resistance and writability with a water-based ink.

【０００６】また、現在はポリカーボネートを基板材料
として使用することが主流であるが、複屈折の小さいア
モルファスポリオレフィン等の材料を基板として使用す
る可能性もある。たゞ、このアモルファスポリオレフィ
ンには、従来のポリカーボネートと比べると、有機樹脂
との密着性が悪く、良好なハードコート材料がないとい
う問題点がある。At present, polycarbonate is mainly used as a substrate material, but a material such as amorphous polyolefin having a small birefringence may be used as a substrate. However, this amorphous polyolefin has a problem that it has poor adhesion to an organic resin and no good hard coat material as compared with conventional polycarbonate.

【０００７】従って、本発明は上記従来技術の実情に鑑
みてなされたものであって、その目的は、様々な特性を
満足する有機樹脂膜からなるコート層を設けた保護能力
の向上した光情報記録媒体を提供することにある。Therefore, the present invention has been made in view of the above-mentioned prior art, and an object thereof is to provide an optical information having an improved protective ability by providing a coat layer made of an organic resin film satisfying various characteristics. To provide a recording medium.

【０００８】[0008]

【課題を解決するための手段】本発明によれば、光学的
に情報を記録あるいは再生する光情報記録媒体におい
て、有機樹脂膜を２層以上積層し、しかもそれら各層の
性質が異なるものであることを特徴とする光情報記録媒
体が提供される。According to the present invention, in an optical information recording medium for optically recording or reproducing information, two or more organic resin films are laminated, and the properties of each layer are different. An optical information recording medium characterized by the above is provided.

【０００９】また、本発明によれば、前記光情報記録媒
体において、レーザ光を入射する基板面側に前記有機樹
脂膜を２層以上積層してなることを特徴とする光情報記
録媒体が提供され、更に上記光情報記録媒体において、
前記有機樹脂膜が基板側の下地となる第１の層とその上
の第２の層からなり、しかも第１の層の導電率が基板及
び第２の層の導電率より小さく、且つ第２の層の耐候
性、耐湿性が第１の層よりすぐれたものであることを特
徴とする光情報記録媒体が提供され、また上記光情報記
録媒体において、前記有機樹脂膜が基板側の下地となる
第１の層とその上の第２の層からなり、しかも第１の層
の基板及び第２の層への密着力が、第２の層が下地とな
った場合の第２の層の基板への密着力よりも大きいもの
であることを特徴とする光情報記録媒体が提供される。Further, according to the present invention, there is provided an optical information recording medium, characterized in that, in the optical information recording medium, two or more layers of the organic resin film are laminated on a substrate surface side on which a laser beam is incident. In the above optical information recording medium,
The organic resin film is composed of a first layer serving as a base on the substrate side and a second layer thereover, and the conductivity of the first layer is smaller than the conductivity of the substrate and the second layer, and the second layer An optical information recording medium is provided in which the weather resistance and moisture resistance of the layer are better than those of the first layer, and in the optical information recording medium, the organic resin film serves as a substrate-side underlayer. Which is composed of a first layer and a second layer on the first layer, and the adhesion of the first layer to the substrate and the second layer is different from that of the second layer when the second layer serves as a base. Provided is an optical information recording medium characterized by having an adhesion force larger than that of a substrate.

【００１０】更に、本発明によれば、前記光情報記録媒
体において、レーザ光を入射する基板面に対し反対側に
前記有機樹脂膜を２層以上積層してなることを特徴とす
る光情報記録媒体が提供され、また上記光情報記録媒体
において、前記有機樹脂膜が基板側の下地となる第１の
層とその上の第２の層からなり、しかも第１の層が第２
の層より耐候性、耐湿性にすぐれていて、且つ第２の層
が第１の層より吸水性が大きいものであることを特徴と
する光情報記録媒体が提供され、更に上記光情報記録媒
体において、前記有機樹脂膜が基板側の下地となる第１
の層とその上の第２の層からなり、且つ基板と第１の層
の間には、記録膜、誘電体膜、あるいは反射膜からなる
膜があり、しかも第１の層のこれらの膜及び第２の層へ
の密着力が、第２の層が下地となった場合の第２の層の
これらの膜への密着力よりも大きいものであることを特
徴とする光情報記録媒体が提供される。Further, according to the present invention, in the optical information recording medium, two or more layers of the organic resin film are laminated on the side opposite to the substrate surface on which the laser light is incident, and the optical information recording is characterized. A medium is provided, and in the above optical information recording medium, the organic resin film is composed of a first layer as a base on the substrate side and a second layer thereon, and the first layer is a second layer.
The present invention provides an optical information recording medium characterized by being superior in weather resistance and moisture resistance to the first layer, and having a second layer having a higher water absorption than the first layer. First, the organic resin film serves as a substrate on the substrate side.
Of the recording layer, the dielectric film, or the reflection film between the substrate and the first layer, and these films of the first layer. And an adhesion force to the second layer is larger than an adhesion force to the films of the second layer when the second layer is a base. Provided.

【００１１】以下、本発明について詳しく説明する。本
発明では、有機樹脂膜を２層以上積層させ、各層の特性
を選ぶことにより、１層だけでは達成できない特性を得
ることができる。より具体的には本発明では、レーザ光
を入射する基板面側に、又は／及びレーザ光を入射する
基板面に対し反対側に異なった選ばれた特性の有機樹脂
膜を２層以上積層させる。The present invention will be described in detail below. In the present invention, by stacking two or more layers of organic resin films and selecting the characteristics of each layer, it is possible to obtain characteristics that cannot be achieved by only one layer. More specifically, in the present invention, two or more layers of organic resin films having different selected characteristics are laminated on the substrate surface side on which laser light is incident or / and on the opposite side to the substrate surface on which laser light is incident. .

【００１２】ハードコートの場合は、有機樹脂膜に帯電
量を小さくするために、樹脂中に金属フィラーを分散さ
せ導電性をもたせたり、あるいは樹脂中のモノマーない
しオリゴマーに親水基をもたせ、膜の表面に水を吸着さ
せ、水の導電性を利用して膜に導電性をもたせている。
このような有機樹脂膜を８０℃、８０％等の高温高湿の
環境下におくと、金属フィラーの酸化腐食あるいは析出
が発生したり、親水基が水を吸収して膜が変質したりす
る。この導電性樹脂膜を保護するために、この膜の上に
耐候性、耐湿性にすぐれた有機保護膜を積層させる。こ
うすることにより、表面は耐候性、耐湿性に強く、下地
となる導電性樹脂膜から電荷が逃げるため帯電しにくく
なり、２つの特性を得ることができる。In the case of a hard coat, in order to reduce the amount of charge on the organic resin film, a metal filler is dispersed in the resin so as to have conductivity, or a monomer or oligomer in the resin is provided with a hydrophilic group to form a film. Water is adsorbed on the surface, and the conductivity of water is used to make the film conductive.
When such an organic resin film is placed in an environment of high temperature and high humidity such as 80 ° C. and 80%, oxidative corrosion or precipitation of the metal filler occurs, or the hydrophilic group absorbs water to deteriorate the film. . In order to protect this conductive resin film, an organic protective film having excellent weather resistance and moisture resistance is laminated on this film. By doing so, the surface has strong weather resistance and moisture resistance, and the electric charge escapes from the conductive resin film which is the base, so that it is difficult to be charged, and two characteristics can be obtained.

【００１３】基板材質によっても、ハードコートに求め
られる特性が異なる。例えば、現状では光ディスクの基
板としてはポリカーボネートが一般的であるが、アモル
ファスポリオレフィン等の複屈折の小さい材料の場合、
従来のハードコート材料だと密着性が小さく基板からは
がれやすい。また、基板との密着性を大きくすると、そ
の他のハードコート特性が悪くなる。そこで、ハードコ
ート特性（硬度、耐候性、耐湿性等）はよくないが、ア
モルファスポリオレフィンや従来のハードコート材料と
の密着性にすぐれた有機樹脂を下地層とし、その上にハ
ードコート特性のすぐれた有機樹脂膜を積層すれば、ア
モルファスポリオレフィンに対しハードコートが可能と
なる。The characteristics required for the hard coat differ depending on the substrate material. For example, at present, polycarbonate is generally used as the substrate of an optical disc, but in the case of a material having a small birefringence such as amorphous polyolefin,
Conventional hard coat materials have low adhesion and are easily peeled off from the substrate. Further, if the adhesion to the substrate is increased, other hard coat properties will be deteriorated. Therefore, the hard coat properties (hardness, weather resistance, moisture resistance, etc.) are not good, but an organic resin that has excellent adhesion to amorphous polyolefin and conventional hard coat materials is used as the underlayer, and the hard coat properties are superior. By stacking other organic resin films, it is possible to hard coat the amorphous polyolefin.

【００１４】保護膜に水性インクでの筆記性をもたせる
ためには、有機樹脂膜に吸水性をもたせる必要がある。
この場合、この膜を記録膜、誘電体膜あるいは反射膜上
に積層させると、８０℃、８０％等の高温、高湿の環境
下においた場合、水分を有機樹脂膜が吸収し、記録膜等
が酸化、腐食しやすくなる。そこで、下地層として、耐
候性、耐湿性にすぐれた有機樹脂膜を用いると、筆記性
と耐候性、耐湿性を両立させることができる。In order for the protective film to have writability with an aqueous ink, the organic resin film needs to have water absorbency.
In this case, when this film is laminated on the recording film, the dielectric film, or the reflective film, the organic resin film absorbs moisture under the environment of high temperature and high humidity such as 80 ° C. and 80%, and the recording film Etc. are easily oxidized and corroded. Therefore, if an organic resin film having excellent weather resistance and moisture resistance is used as the underlayer, both writability, weather resistance, and moisture resistance can be achieved.

【００１５】記録膜、誘電体膜あるいは反射膜上に有機
樹脂膜を積層した場合、密着力と硬度を両立させること
がむずかしい。というのは、無機の膜と有機の膜との密
着性を大きくすることがむずかしいためである。そこ
で、下地層として硬度は小さいが記録膜等及び有機保護
膜の両方と密着性がよいものを選び、その上に硬度が大
きい有機樹脂を積層させることにより、密着性と硬度を
両立させることができる。When an organic resin film is laminated on a recording film, a dielectric film or a reflective film, it is difficult to achieve both good adhesion and good hardness. This is because it is difficult to increase the adhesion between the inorganic film and the organic film. Therefore, it is possible to achieve both adhesiveness and hardness by selecting an underlayer having low hardness but good adhesiveness to both the recording film and the organic protective film and laminating an organic resin having high hardness thereon. it can.

【００１６】以下、本発明を図面に沿って更に詳しく説
明する。レーザ光を入射する基板面側に、基板側の下地
となる有機樹脂膜の第１の層とその上の有機樹脂膜の第
２の層を設け、しかも第１の層の導電率が基板及び第２
の層の導電率より小さく、且つ第２の層の耐候性、耐湿
性が第１の層よりすぐれたものである場合の例を図１に
示す。図１において、１は基板、２は積層有機樹脂膜か
らなるハードコート層で、２１がその第１の層（以降、
ＨＣ１と略記することがある）、２２がその第２の層
（以降、ＨＣ２と略記することがある）、３が有機樹脂
膜からなるオーバーコート層（以降、ＯＣと略記するこ
とがある）、４及び４′が誘電体膜からなる誘導体層、
５が記録膜からなる記録層、６が反射膜からなる反射層
である。The present invention will be described in more detail below with reference to the drawings. A first layer of an organic resin film as a base of the substrate and a second layer of the organic resin film thereon are provided on the side of the substrate on which the laser light is incident, and the conductivity of the first layer is higher than that of the substrate. Second
FIG. 1 shows an example in which the conductivity of the second layer is smaller than that of the first layer and the weather resistance and moisture resistance of the second layer are superior to those of the first layer. In FIG. 1, 1 is a substrate, 2 is a hard coat layer made of a laminated organic resin film, and 21 is the first layer (hereinafter,
HC2), a second layer 22 thereof (hereinafter sometimes abbreviated as HC2), an overcoat layer 3 made of an organic resin film (hereinafter sometimes abbreviated as OC), 4 and 4'are dielectric layers composed of a dielectric film,
Reference numeral 5 is a recording layer made of a recording film, and 6 is a reflective layer made of a reflective film.

【００１７】図１の構成の場合は、ＨＣ１を下地層と
し、ＨＣ１の導電率がＨＣ２より小さい。ＨＣ１の抵抗
値は１×１０13Ω・cm以下が望ましい。また、ＨＣ２の
耐候性、耐湿性がＨＣ１よりよい。この場合、ＨＣ１、
ＨＣ２ともレーザ光に対し透明であり、ＨＣ２の硬度が
ＨＣ１より大きいことが望ましい。ＨＣ２の硬度はＨ以
上が望ましい。具体的にこの場合は、光磁気ディスクに
応用した例であり、誘電体としてＳｉＯ2、ＳｉＮ等、
記録膜としてＴｂＦｅＣｏ、ＧｄＦｅＣｏ等、反射膜と
してＡｌ、ＡｌＴｉ等が考えられる。ＨＣ１として触媒
化成社のＮ−９１３、ＨＣ２として大日本インキ社のＳ
Ｄ−１７が考えられる。８０℃、８０％環境下だとＮ−
９１３の金属フィラーが析出してしまうが、ＳＤ−１７
をその上に積層することにより、析出を防止している。In the case of the structure shown in FIG. 1, HC1 is used as a base layer, and the conductivity of HC1 is smaller than that of HC2. It is desirable that the resistance value of HC1 be 1 × 10 13 Ω · cm or less. Further, HC2 has better weather resistance and moisture resistance than HC1. In this case, HC1,
It is desirable that both HC2 are transparent to the laser light and that the hardness of HC2 is larger than that of HC1. The hardness of HC2 is preferably H or higher. Specifically, this case is an example applied to a magneto-optical disk, and SiO 2 , SiN, or the like is used as a dielectric.
The recording film may be TbFeCo, GdFeCo, or the like, and the reflective film may be Al, AlTi, or the like. N-913 from Catalysis Chemical Co., Ltd. as HC1 and S from Dainippon Ink and Chemicals as HC2
D-17 is possible. N- at 80 ° C and 80% environment
Although the metal filler of 913 is deposited, SD-17
Is deposited on it to prevent precipitation.

【００１８】レーザ光を入射する基板面側に、基板側の
下地となる有機樹脂膜の第１の層とその上の有機樹脂膜
の第２の層を設け、しかも第１の層の基板及び第２の層
への密着力が、第２の層が下地となった場合の第２の層
の基板への密着力よりも大きいものである場合の例を、
図２に示す。この例では基板１はアモルファスポリオレ
フィン製である。基板にアモルファスポリオレフィンを
使用した場合、ＨＣ１を下地層とし、ＨＣ１がアモルフ
ァスポリオレフィン及びＨＣ２に対し密着力が大きい。
この場合、ＨＣ１、ＨＣ２ともレーザ光に対し透明であ
り、ＨＣ２は硬度、導電性、耐候性、耐湿性にすぐれた
ものが望ましい。ＨＣ２の硬度はＨ以上、抵抗値は１×
１０13Ω・cm以下が望ましい。A first layer of an organic resin film, which is a base on the substrate side, and a second layer of the organic resin film thereon are provided on the side of the substrate on which the laser light is incident, and the substrate of the first layer and An example in which the adhesive force to the second layer is larger than the adhesive force to the substrate of the second layer when the second layer is a base,
As shown in FIG. In this example, the substrate 1 is made of amorphous polyolefin. When an amorphous polyolefin is used for the substrate, HC1 serves as a base layer, and HC1 has a large adhesion to the amorphous polyolefin and HC2.
In this case, it is desirable that both HC1 and HC2 be transparent to the laser beam, and that HC2 have excellent hardness, conductivity, weather resistance and moisture resistance. The hardness of HC2 is H or more, and the resistance value is 1 ×
10 13 Ω · cm or less is desirable.

【００１９】レーザ光を入射する基板面側に、基板側の
下地となる有機樹脂膜の第１の層とその上の有機樹脂膜
の第２の層を設け、しかも第１の層の導電率が基板及び
第２の層の導電率より小さく、且つ第２の層の耐候性、
耐湿性が第１の層よりすぐれたものであり、更に第１の
層の基板及び第２の層への密着力が、第２の層が下地と
なった場合の第２の層の基板への密着力よりも大きいも
のである場合の例を、図３に示す。即ち、本例は図２に
おいて、ＨＣ２が導電性と耐候性、耐湿性を両立させる
ことがむずかしい場合の解決例であり、ＨＣ２を更に２
層（ＨＣ２とＨＣ３……図中２２と２３）に分割した構
成となっている。こゝにおけるＨＣ２とＨＣ３は図１に
おけるＨＣ１とＨＣ２にそれぞれ対応している。それ以
外は図２と同一である。A first layer of an organic resin film as a base on the substrate side and a second layer of the organic resin film thereon are provided on the side of the substrate on which the laser light is incident, and the conductivity of the first layer is provided. Is smaller than the conductivity of the substrate and the second layer, and the weather resistance of the second layer,
Moisture resistance is superior to that of the first layer, and further, the adhesion of the first layer to the substrate and the second layer is improved to the substrate of the second layer when the second layer is the base. FIG. 3 shows an example in which the adhesive force is larger than the adhesive force of. That is, this example is a solution example in the case where it is difficult for HC2 to achieve both conductivity, weather resistance and moisture resistance in FIG.
The structure is divided into layers (HC2 and HC3 ... 22 and 23 in the figure). HC2 and HC3 here correspond to HC1 and HC2 in FIG. 1, respectively. Other than that, it is the same as FIG.

【００２０】レーザ光を入射する基板面に対し反対側
に、基板側の下地となる有機樹脂膜の第１の層とその上
の有機樹脂膜の第２の層を設け、しかも第１の層が第２
の層より耐候性、耐湿性にすぐれていて、且つ第２の層
が第１の層より吸水性が大きいものである場合の例を、
図４に示す。図４においては、オーバーコート層３が積
層有機樹脂膜からなり、３１がその第１の層（以降、Ｏ
Ｃ１と略記することがある）、３２がその第２の層（以
降、ＯＣ２と略記することがある）である。A first layer of an organic resin film as a base on the substrate side and a second layer of the organic resin film thereon are provided on the side opposite to the surface of the substrate on which the laser light is incident, and the first layer is also provided. Is the second
Examples of the case where the second layer is superior in weather resistance and moisture resistance to the first layer and has a higher water absorption than the first layer,
As shown in FIG. In FIG. 4, the overcoat layer 3 is made of a laminated organic resin film, and 31 is the first layer (hereinafter referred to as O).
C1) and 32 are the second layers (hereinafter sometimes abbreviated as OC2).

【００２１】ＯＣ１を下地層とし、ＯＣ１の耐候性、耐
湿性がＯＣ２よりすぐれていて、ＯＣ２の吸水性がＯＣ
１よりすぐれている。ＯＣ２に水性インクで筆記するこ
とが可能となる。ＯＣ２は耐候性、耐湿性に関しては弱
いが、ＯＣ１により反射膜と遮断されているので、反射
膜の酸化、腐食は発生しない。具体的にこの場合は、Ｃ
Ｄ−Ｒ（追記型ＣＤ）に応用した例であり、記録膜とし
てシアニン色素、フタロシアニン色素等、反射膜として
Ａｕ等が考えられる。ＯＣ１として大日本インキ社のＳ
Ｄ−１７、ＯＣ２として紫外線硬化樹脂中にフィラーと
してＳｉＯ2を重量比で１０〜５０％分散させたものが
考えられる。With OC1 as a base layer, OC1 has better weather resistance and moisture resistance than OC2, and OC2 has a water absorption property of OC.
Better than 1. It becomes possible to write on OC2 with a water-based ink. OC2 is weak in weather resistance and moisture resistance, but since it is shielded from the reflective film by OC1, oxidation and corrosion of the reflective film do not occur. Specifically, in this case, C
This is an example applied to a D-R (write-once type CD), and cyanine dye, phthalocyanine dye and the like can be used as the recording film, and Au and the like can be used as the reflective film. S1 from Dainippon Ink and Chemicals as OC1
D-17, which the SiO 2 was 10-50% dispersion in a weight ratio is considered as a filler in the ultraviolet curable resin as OC2.

【００２２】レーザ光を入射する基板面側に、基板側の
下地となる有機樹脂膜の第１の層とその上の有機樹脂膜
の第２の層を設け、しかも第１の層の導電率が基板及び
第２の層の導電率より小さく、且つ第２の層の耐候性、
耐湿性が第１の層よりすぐれたものであり、更にレーザ
光を入射する基板面に対し反対側に、基板側の下地とな
る有機樹脂膜の第１の層とその上の有機樹脂膜の第２の
層を設け、しかも第１の層が第２の層より耐候性、耐湿
性にすぐれていて、且つ第２の層が第１の層より吸水性
が大きいものである場合の例を、図５に示す。ＨＣ１は
触媒化成社のＮ−９１３、ＨＣ２とＯＣ１は大日本イン
キ社のＳＤ−１７、ＯＣ２は紫外線硬化樹脂中にフィラ
ーとしてＳｉＯ2を重量比で１０〜５０％分散させたも
のが適切である。A first layer of an organic resin film, which is a base on the substrate side, and a second layer of the organic resin film thereon are provided on the substrate surface side on which the laser light is incident, and the conductivity of the first layer is also provided. Is smaller than the conductivity of the substrate and the second layer, and the weather resistance of the second layer,
Moisture resistance is superior to that of the first layer, and further, on the side opposite to the substrate surface on which the laser light is incident, the first layer of the organic resin film which is the base of the substrate side and the organic resin film thereabove are formed. An example in which a second layer is provided, the first layer has better weather resistance and moisture resistance than the second layer, and the second layer has a higher water absorption than the first layer , As shown in FIG. HC1 is suitably that the SiO 2 was 10-50% dispersion in a weight ratio as filler SD-17, OC2 of N-913, HC2 and OC1 of Shokubai Kasei Dainippon Ink and Chemicals, Inc. During the ultraviolet curable resin .

【００２３】[0023]

【実施例】以下実施例について本発明を説明するが、本
発明はこれらに限定されるものではない。The present invention will be described below with reference to examples, but the present invention is not limited thereto.

【００２４】実施例１ レーザ光を入射する基板面側に、基板側の下地となる有
機樹脂膜の第１の層とその上の有機樹脂膜の第２の層を
設け、しかも第１の層の導電率が基板及び第２の層の導
電率より小さく、且つ第２の層の耐候性、耐湿性が第１
の層よりすぐれたものである場合、即ち、図１に示され
るような層構成の光磁気ディスクを作製した。この場合
の積層有機樹脂膜の構成材料及び物性を表１に示す。Example 1 A first layer of an organic resin film serving as a base of the substrate and a second layer of the organic resin film thereon are provided on the substrate surface side on which laser light is incident, and the first layer is also provided. Has a conductivity lower than that of the substrate and the second layer, and the second layer has weather resistance and moisture resistance of the first level.
If it is superior to the above layer, that is, a magneto-optical disk having a layer structure as shown in FIG. 1 was produced. Table 1 shows constituent materials and physical properties of the laminated organic resin film in this case.

【表１】 以上材料からなる積層有機樹脂膜を形成させたことか
ら、Ｎ−９１３の導電性とＳＤ−１７の耐候性、耐湿性
を両立させることができた。[Table 1] Since the laminated organic resin film made of the above materials was formed, it was possible to achieve both the conductivity of N-913 and the weather resistance and moisture resistance of SD-17.

【００２５】実施例２ レーザ光を入射する基板面に対し反対側に、基板側の下
地となる有機樹脂膜の第１の層とその上の有機樹脂膜の
第２の層を設け、しかも第１の層が第２の層より耐候
性、耐湿性にすぐれていて、且つ第２の層が第１の層よ
り吸水性が大きいものである場合、即ち、図４に示され
るような層構成のＣＤ−Ｒ（追記型光ディスク）を作製
した。この場合の積層有機樹脂膜の構成材料及び膜厚を
表２に示す。Example 2 A first layer of an organic resin film as a base on the substrate side and a second layer of the organic resin film thereon are provided on the side opposite to the substrate surface on which laser light is incident, and When the first layer has better weather resistance and moisture resistance than the second layer and the second layer has a higher water absorption than the first layer, that is, the layer constitution as shown in FIG. CD-R (write-once type optical disk) of was produced. Table 2 shows the constituent materials and film thickness of the laminated organic resin film in this case.

【表２】 註）ＯＣ２はＳＤ−１７にＳｉＯ2を分散させることに
より、吸水性を大きくしている。 ＳＤ−１７＋ＳｉＯ2をＯＣ２とすることにより、イン
クジェットプリンタで印刷が可能となった。[Table 2] Note: OC2 increases the water absorption by dispersing SiO 2 in SD-17. By using SD-17 + SiO 2 as OC2, printing became possible with an inkjet printer.

【００２６】[0026]

【発明の効果】請求項１の光情報記録媒体は、光学的に
情報を記録あるいは再生する光情報記録媒体において、
有機樹脂膜を２層以上積層し、しかもそれら各層の性質
が異なるものとしたことから、１層では得られないすぐ
れた特性のコート層を有するものとなる。The optical information recording medium according to claim 1 is an optical information recording medium for optically recording or reproducing information.
Since two or more layers of organic resin films are laminated and the properties of each layer are different, a coat layer having excellent characteristics that cannot be obtained by one layer is provided.

【００２７】請求項２の光情報記録媒体は、レーザ光を
入射する基板面側に前記有機樹脂膜を２層以上積層して
なるものとしたことから、すぐれた特性のハードコート
層を有するものとなる。The optical information recording medium according to claim 2 has a hard coat layer having excellent characteristics because it is formed by laminating two or more layers of the organic resin film on the substrate surface side on which laser light is incident. Becomes

【００２８】請求項３の光情報記録媒体は、前記有機樹
脂膜が基板側の下地となる第１の層とその上の第２の層
からなり、しかも第１の層の導電率が基板及び第２の層
の導電率より小さく、且つ第２の層の耐候性、耐湿性が
第１の層よりすぐれたものとしたことから、耐候性、耐
湿性及び防塵性にすぐれたハードコート層を有するもの
となる。According to a third aspect of the present invention, there is provided an optical information recording medium, wherein the organic resin film is composed of a first layer as a base on the substrate side and a second layer on the first layer, and the conductivity of the first layer is equal to that of the substrate. Since the conductivity of the second layer is smaller than that of the second layer and the weather resistance and moisture resistance of the second layer are superior to those of the first layer, a hard coat layer excellent in weather resistance, moisture resistance and dust resistance is to be formed. Will have.

【００２９】請求項４の光情報記録媒体は、前記有機樹
脂膜が基板側の下地となる第１の層とその上の第２の層
からなり、しかも第１の層の基板及び第２の層への密着
力が、第２の層が下地となった場合の第２の層の基板へ
の密着力よりも大きいものとしたことから、密着性のよ
いハードコート層を有するものとなる。In the optical information recording medium according to the present invention, the organic resin film is composed of a first layer, which is a base on the substrate side, and a second layer thereon, and further, the first layer substrate and the second layer. Since the adhesion to the layer is set to be larger than the adhesion to the substrate of the second layer when the second layer serves as a base, the hard coat layer has good adhesion.

【００３０】請求項５の光情報記録媒体は、レーザ光を
入射する基板面に対し反対側に前記有機樹脂膜を２層以
上積層してなるものとしたことから、すぐれた特性のオ
ーバーコート層を有するものとなる。Since the optical information recording medium according to claim 5 is formed by laminating two or more layers of the organic resin film on the side opposite to the substrate surface on which the laser light is incident, an overcoat layer having excellent characteristics is provided. Will have.

【００３１】請求項６の光情報記録媒体は、前記有機樹
脂膜が基板側の下地となる第１の層とその上の第２の層
からなり、しかも第１の層が第２の層より耐候性、耐湿
性にすぐれていて、且つ第２の層が第１の層より吸水性
が大きいものとしたことから、耐候性、耐湿性及び筆記
性にすぐれたオーバーコート層を有するものとなる。According to a sixth aspect of the present invention, there is provided an optical information recording medium, wherein the organic resin film is composed of a first layer as a base on the substrate side and a second layer on the first layer, and the first layer is more than the second layer. Since the second layer has excellent weather resistance and moisture resistance, and the second layer has higher water absorption than the first layer, it has an overcoat layer excellent in weather resistance, moisture resistance and writability. .

【００３２】請求項７の光情報記録媒体は、前記有機樹
脂膜が基板側の下地となる第１の層とその上の第２の層
からなり、且つ基板と第１の層の間には、記録膜、誘電
体膜、あるいは反射膜からなる膜があり、しかも第１の
層のこれらの膜及び第２の層への密着力が、第２の層が
下地となった場合の第２の層のこれらの膜への密着力よ
りも大きいものとしたことから、密着性のよいオーバー
コート層を有するものとなる。According to a seventh aspect of the present invention, there is provided an optical information recording medium, wherein the organic resin film is composed of a first layer which is a base on the substrate side and a second layer formed on the first layer, and between the substrate and the first layer. , A recording film, a dielectric film, or a reflective film, and the adhesion of the first layer to these films and the second layer has a second value when the second layer is a base. Since the layer has a larger adhesion to these films, it has an overcoat layer with good adhesion.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の光情報記録媒体の層構成例を示す模式
断面図である。FIG. 1 is a schematic cross-sectional view showing a layer configuration example of an optical information recording medium of the present invention.

【図２】本発明の光情報記録媒体の別の層構成例を示す
模式断面図である。FIG. 2 is a schematic cross-sectional view showing another layer configuration example of the optical information recording medium of the present invention.

【図３】本発明の光情報記録媒体の別の層構成例を示す
模式断面図である。FIG. 3 is a schematic cross-sectional view showing another layer configuration example of the optical information recording medium of the present invention.

【図４】本発明の光情報記録媒体の別の層構成例を示す
模式断面図である。FIG. 4 is a schematic cross-sectional view showing another layer configuration example of the optical information recording medium of the present invention.

【図５】本発明の光情報記録媒体の別の層構成例を示す
模式断面図である。FIG. 5 is a schematic cross-sectional view showing another layer configuration example of the optical information recording medium of the present invention.

【符号の説明】[Explanation of symbols]

１ 基板 ２ ハードコート層 ２１ 第１のハードコート層 ２２ 第２のハードコート層 ２３ 第３のハードコート層 ３ オーバーコート層 ３１ 第１のオーバーコート層 ３２ 第２のオーバーコート層 ４，４′ 誘電体層 ５ 記録層 ６ 反射層 DESCRIPTION OF SYMBOLS 1 Substrate 2 Hard coat layer 21 1st hard coat layer 22 2nd hard coat layer 23 3rd hard coat layer 3 Overcoat layer 31 1st overcoat layer 32 2nd overcoat layer 4, 4'dielectric Body layer 5 Recording layer 6 Reflective layer

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 光学的に情報を記録あるいは再生する光
情報記録媒体において、有機樹脂膜を２層以上積層し、
しかもそれら各層の性質が異なるものであることを特徴
とする光情報記録媒体。1. An optical information recording medium for optically recording or reproducing information, wherein two or more organic resin films are laminated,
Moreover, the optical information recording medium is characterized in that the respective layers have different properties. 【請求項２】 請求項１の光情報記録媒体において、レ
ーザ光を入射する基板面側に前記有機樹脂膜を２層以上
積層してなる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 two or more layers of the organic resin film are laminated on a substrate surface side on which laser light is incident. 【請求項３】 請求項２の光情報記録媒体において、前
記有機樹脂膜が基板側の下地となる第１の層とその上の
第２の層からなり、しかも第１の層の導電率が基板及び
第２の層の導電率より小さく、且つ第２の層の耐候性、
耐湿性が第１の層よりすぐれたものであることを特徴と
する光情報記録媒体。3. The optical information recording medium according to claim 2, wherein the organic resin film is composed of a first layer as a base on the substrate side and a second layer on the first layer, and the conductivity of the first layer is Less than the electrical conductivity of the substrate and the second layer, and the weather resistance of the second layer,
An optical information recording medium having moisture resistance superior to that of the first layer. 【請求項４】 請求項２の光情報記録媒体において、前
記有機樹脂膜が基板側の下地となる第１の層とその上の
第２の層からなり、しかも第１の層の基板及び第２の層
への密着力が、第２の層が下地となった場合の第２の層
の基板への密着力よりも大きいものであることを特徴と
する光情報記録媒体。4. The optical information recording medium according to claim 2, wherein the organic resin film is composed of a first layer as a base on the substrate side and a second layer thereon, and the substrate and the first layer are An optical information recording medium, wherein the adhesion to the second layer is larger than the adhesion to the substrate of the second layer when the second layer is the base. 【請求項５】 請求項１の光情報記録媒体において、レ
ーザ光を入射する基板面に対し反対側に前記有機樹脂膜
を２層以上積層してなることを特徴とする光情報記録媒
体。5. The optical information recording medium according to claim 1, wherein two or more layers of the organic resin film are laminated on a side opposite to a substrate surface on which laser light is incident. 【請求項６】 請求項５の光情報記録媒体において、前
記有機樹脂膜が基板側の下地となる第１の層とその上の
第２の層からなり、しかも第１の層が第２の層より耐候
性、耐湿性にすぐれていて、且つ第２の層が第１の層よ
り吸水性が大きいものであることを特徴とする光情報記
録媒体。6. The optical information recording medium according to claim 5, wherein the organic resin film comprises a first layer as a base on the substrate side and a second layer thereon, and the first layer is the second layer. An optical information recording medium, which is superior in weather resistance and moisture resistance to a layer, and in which the second layer has a higher water absorption than the first layer. 【請求項７】 請求項５の光情報記録媒体において、前
記有機樹脂膜が基板側の下地となる第１の層とその上の
第２の層からなり、且つ基板と第１の層の間には、記録
膜、誘電体膜、あるいは反射膜からなる膜があり、しか
も第１の層のこれらの膜及び第２の層への密着力が、第
２の層が下地となった場合の第２の層のこれらの膜への
密着力よりも大きいものであることを特徴とする光情報
記録媒体。7. The optical information recording medium according to claim 5, wherein the organic resin film is composed of a first layer as a base on the substrate side and a second layer on the first layer, and between the substrate and the first layer. Has a film composed of a recording film, a dielectric film, or a reflective film, and the adhesion of the first layer to these films and the second layer is An optical information recording medium, characterized in that the second layer has a larger adhesion to these films.
JP6282614A 1994-10-21 1994-10-21 Optical information recording medium Pending JPH08124216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6282614A JPH08124216A (en) 1994-10-21 1994-10-21 Optical information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6282614A JPH08124216A (en) 1994-10-21 1994-10-21 Optical information recording medium

Publications (1)

Publication Number Publication Date
JPH08124216A true JPH08124216A (en) 1996-05-17

Family

ID=17654819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6282614A Pending JPH08124216A (en) 1994-10-21 1994-10-21 Optical information recording medium

Country Status (1)

Country Link
JP (1) JPH08124216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100777A1 (en) * 2002-05-29 2003-12-04 Tdk Corporation Optical information medium and production method therefor
USRE43974E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE43973E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43972E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE44154E1 (en) 1998-04-03 2013-04-16 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43974E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43975E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43966E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE44018E1 (en) 1998-04-03 2013-02-19 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43969E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43971E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43970E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43967E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
USRE43968E1 (en) 1998-04-03 2013-02-05 Kabushiki Kaisha Toshiba Information recording medium and method of manufacturing resinous substrate for use in the recording medium
WO2003100777A1 (en) * 2002-05-29 2003-12-04 Tdk Corporation Optical information medium and production method therefor
US7153558B2 (en) 2002-05-29 2006-12-26 Tdk Corporation Optical information medium and production method therefor
CN100437784C (en) * 2002-05-29 2008-11-26 Tdk株式会社 Optical information medium and production method therefor

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