JPH0877606A - Optical disk structure and fabrication thereof - Google Patents

Optical disk structure and fabrication thereof

Info

Publication number
JPH0877606A
JPH0877606A JP6207131A JP20713194A JPH0877606A JP H0877606 A JPH0877606 A JP H0877606A JP 6207131 A JP6207131 A JP 6207131A JP 20713194 A JP20713194 A JP 20713194A JP H0877606 A JPH0877606 A JP H0877606A
Authority
JP
Japan
Prior art keywords
optical disk
information recording
recording layer
thickness
transparent substrate
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.)
Withdrawn
Application number
JP6207131A
Other languages
Japanese (ja)
Inventor
Masato Terada
正人 寺田
Koichi Matsumoto
光市 松本
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP6207131A priority Critical patent/JPH0877606A/en
Publication of JPH0877606A publication Critical patent/JPH0877606A/en
Withdrawn legal-status Critical Current

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  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE: To assure sufficient mechanical accuracy even during high speed rotation by sequentially laminating a viscous material layer, another information recording layer and a transparent substrate in contact with the surface having the information recording layer. CONSTITUTION: On a discrete optical disk providing an information recording layer 2 at a single surface of the transparent substrate 1 in the thickness of 0.3 to 0.9mm, a viscous material layer 3, in some cases, both organic material supporting layer 4 and a viscous material layer 3 are provided in contact with the surface having the information recording layer 2. Moreover, the information recording layer 2 and the transparent substrate 1 of the other discrete optical disk having the similar constitution are laminated in this sequence. Thereby, a high density and high capacity optical disk having sufficient mechanical accuracy even during high speed rotation can be obtained.

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−ザ−ビ−ム等によ
り、情報を高密度、大容量で記録、再生、消去できる光
ディスクおよびその製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk capable of recording, reproducing and erasing information with a high density and a large capacity by a laser beam and the like and a method for manufacturing the same.

【0002】[0002]

【従来の技術】光ディスクとしては、再生専用型と記録
型があり、産業用途や民生用途に幅広く使われている。
近年の技術進歩と市場要求の高度化に合わせて、光ディ
スクの高密度化、大容量化がますます要求されている。
光ディスクの高密度化、大容量化を達成するためには、
信号の最小単位の大きさ、すなわちピットサイズをでき
るかぎり小さくする必要がある。そのためには、レ−ザ
ビ−ムを短波長化する方法、対物レンズの開口数NAを
大きくしてビ−ムを絞り込む方法等がある。後者の方法
をとる場合は、情報記録層上に正しく焦点を結ぶために
は、従来の光ディスクのような厚さ1.2mmの基板を
使うことはできなくなり、開口数NAに合わせて0.3
〜0.9mmの基板を使うことが必要となる。
2. Description of the Related Art There are two types of optical disks, a read-only type and a recordable type, which are widely used for industrial and consumer applications.
In accordance with recent technological progress and sophistication of market demand, there is an increasing demand for higher density and larger capacity of optical discs.
In order to achieve high density and large capacity optical discs,
It is necessary to reduce the minimum unit size of the signal, that is, the pit size as small as possible. For that purpose, there are a method of shortening the wavelength of the laser beam, a method of narrowing the beam by increasing the numerical aperture NA of the objective lens, and the like. When the latter method is adopted, a 1.2 mm-thick substrate such as a conventional optical disk cannot be used to correctly focus on the information recording layer, and it is 0.3 in accordance with the numerical aperture NA.
It is necessary to use a substrate of ~ 0.9 mm.

【0003】[0003]

【発明が解決しようとする課題】一般に、光ディスク単
体の透明基板の厚さが薄くなると高速回転時の機械的精
度が保持できなくなる。そこで、厚さの薄い光ディスク
単体を情報記録面を対向させて二枚接着すれば、機械的
精度を保持し、かつ同時に光ディスクの大容量化を達成
できるが、厚さの薄い光ディスク単体を接着して、高速
回転時の機械的精度を保持することは極めて困難であ
る。また、工業的製造方法として、ロ−ルコ−タ−やス
ピンコ−タ−を使用して粘接着剤を光ディスクに塗布し
て接着する方法が行われているが、光ディスク単体の厚
さが薄い場合はこの方法による安定的製造が困難であっ
た。
Generally, if the thickness of the transparent substrate of a single optical disk becomes thin, the mechanical accuracy at the time of high speed rotation cannot be maintained. Therefore, by bonding two thin optical discs with the information recording surfaces facing each other, the mechanical accuracy can be maintained and at the same time the optical disc capacity can be increased, but the thin optical discs can be bonded together. Therefore, it is extremely difficult to maintain the mechanical accuracy during high speed rotation. Further, as an industrial manufacturing method, a method of applying a tacky adhesive to an optical disk and adhering it using a roll coater or a spin coater is used, but the thickness of the optical disk alone is thin. In this case, stable production by this method was difficult.

【0004】本発明は、高速回転時に機械的精度を保持
し、工業的にも安定的製造が可能な光ディスク構造体
と、その製造方法を提供するものである。
The present invention provides an optical disk structure which maintains mechanical accuracy during high speed rotation and can be manufactured industrially and stably, and a manufacturing method thereof.

【0005】[0005]

【課題を解決するための手段】すなわち本発明は、厚さ
0.3〜0.9mmの透明基板の片面に情報記録層を設
けた光ディスク単体上に、情報記録層を有する面に接し
て、粘着材層、場合によって有機材料系支持材層と粘着
材層、および上記と同じ構造を有する別の光ディスク単
体の情報記録層および透明基板がこの順で積層されてな
る光ディスク構造体に関するものである。
That is, according to the present invention, an optical disk unit having an information recording layer provided on one surface of a transparent substrate having a thickness of 0.3 to 0.9 mm is in contact with the surface having the information recording layer, The present invention relates to an optical disc structure in which an adhesive material layer, an organic material-based support material layer and an adhesive material layer in some cases, and an information recording layer of another optical disk having the same structure as above and a transparent substrate are laminated in this order. .

【0006】さらに本発明は、厚さ0.3〜0.9mm
の透明基板の片面に情報記録層を設けた光ディスク単体
の情報記録層を有する面に、該光ディスク単体の内径と
等しいかそれより大きい内径を有し、かつ当該光ディス
クの外径と等しいかそれより小さい外径を有する当該光
ディスク単体と中心を同じくするドーナツ状の粘着シー
トを粘着させ、その上に上記と同じ構造を有する別の光
ディスク単体の情報記録層を粘着させることを特徴とす
る光ディスク構造体の製造方法に関するものである。
Further, the present invention has a thickness of 0.3 to 0.9 mm.
On the surface having the information recording layer of the optical disk unit having the information recording layer provided on one surface of the transparent substrate, having an inner diameter equal to or larger than the inner diameter of the optical disk unit and equal to or larger than the outer diameter of the optical disk. An optical disk structure characterized by adhering a donut-shaped adhesive sheet having the same center as the optical disk single body having a small outer diameter, and further adhering an information recording layer of another optical disk single body having the same structure as described above on it. The present invention relates to a manufacturing method of.

【0007】図1に、本発明の光ディスク構造体の一例
の断面図を示す。本発明において、光ディスクとは再生
専用型、記録型をいい、記録型には追記型、相変化書換
え方式、光磁気方式、有機色素方式等が含まれる。本発
明において、粘着材としてはアクリル樹脂系粘着材、ス
チレン・ブタジエン系熱可塑性エラストマ−系粘着材、
水素添加スチレン・ブタジエン系熱可塑性エラストマ−
系粘着材、ポリオレフィン系熱可塑性エラストマ−系粘
着材等が有用である。
FIG. 1 shows a sectional view of an example of the optical disk structure of the present invention. In the present invention, the optical disc refers to a read-only type and a recording type, and the recording type includes a write-once type, a phase change rewriting type, a magneto-optical type, an organic dye type and the like. In the present invention, as the adhesive material, an acrylic resin-based adhesive material, a styrene / butadiene-based thermoplastic elastomer-based adhesive material,
Hydrogenated styrene-butadiene thermoplastic elastomer
A system adhesive, a polyolefin thermoplastic elastomer adhesive, and the like are useful.

【0008】また、有機材料系支持材としてはPETフ
ィルム、ポリエステル系不織布、ポリオレフィン系不織
布、ポリオレフィン系発泡フィルム等が有用である。粘
着材の強度、剛性が本発明の製造方法に十分に耐えられ
る場合は、有機材料系支持材は必要としない。光ディス
ク単体を構成する透明基板としてはポリカ−ボネ−ト樹
脂、アクリル樹脂、透明ポリオレフィン樹脂、ガラス等
が用いられる。その厚さは0.3〜0.9mmであり、
対物レンズの開計数NAにより最適化される。対物レン
ズの開口数NAが0.6、透明基板の厚さが0.6mm
の組合せが最適である。
As the organic material-based support material, PET film, polyester-based nonwoven fabric, polyolefin-based nonwoven fabric, polyolefin-based foamed film and the like are useful. When the strength and rigidity of the adhesive material can sufficiently withstand the production method of the present invention, the organic material-based support material is not necessary. Polycarbonate resin, acrylic resin, transparent polyolefin resin, glass and the like are used as the transparent substrate constituting the optical disk unit. Its thickness is 0.3-0.9 mm,
It is optimized by the open count NA of the objective lens. The numerical aperture NA of the objective lens is 0.6 and the thickness of the transparent substrate is 0.6 mm
Is most suitable.

【0009】光ディスク単体を相互に接着する粘着材と
しては、有機材料系支持材の両面に粘着剤が塗布された
シ−トないしフィルム状、もしくは有機材料系支持材を
有さない粘着材シ−トないしフィルム状が用いられる。
その形状は、当該光ディスク単体と同形状であるか、ま
たは当該光ディスク単体の内径より大きい内径を有し、
かつ当該光ディスクの外径より小さい外径を有する当該
光ディスク単体と中心を同じくするドーナツ状が望まし
い。その内径と外径の大きさは、当該光ディスク構造体
の高速回転時の機械的精度を満足させる範囲内で適宜選
択される。図2に、本発明光ディスク構造体の一例の平
面図を示す。
The adhesive material for adhering the optical discs to each other is a sheet or film in which an adhesive is applied on both sides of an organic material-based support material, or an adhesive material sheet having no organic material-based support material. The film or film is used.
The shape is the same as that of the optical disc itself, or has an inner diameter larger than the inner diameter of the optical disc,
A donut shape having the same center as the single optical disk having an outer diameter smaller than the outer diameter of the optical disk is desirable. The sizes of the inner diameter and the outer diameter are appropriately selected within a range that satisfies the mechanical accuracy of the optical disc structure at high speed rotation. FIG. 2 shows a plan view of an example of the optical disc structure of the present invention.

【0010】本発明において、粘着材層の厚さが0.0
05〜0.3mm、有機材料系支持材層の厚さが0〜
0.295mmであり、両者の合計の厚さが0.005
〜0.3mm、両者の厚さ合計のバラツキが平均厚さに
対して±30%以内であることが望ましい。より好まし
くは、粘着材層の厚さが0.05〜0.2mm、有機材
料系支持材層の厚さが0〜0.195mmであり、両者
の合計の厚さが0.05〜0.2mm、両者の厚さ合計
のバラツキが平均厚さに対して±20%以内であること
が望ましい。この範囲外では、光ディスクの高速回転時
の機械的精度を満足することが困難になる。
In the present invention, the adhesive layer has a thickness of 0.0.
05-0.3 mm, the thickness of the organic material-based support material layer is 0
0.295 mm, the total thickness of both is 0.005
.About.0.3 mm, and the variation in the total thickness of both is preferably within ± 30% of the average thickness. More preferably, the thickness of the adhesive material layer is 0.05 to 0.2 mm, the thickness of the organic material-based support material layer is 0 to 0.195 mm, and the total thickness of both is 0.05 to 0. It is desirable that the variation of 2 mm and the total thickness of both is within ± 20% of the average thickness. Outside this range, it becomes difficult to satisfy the mechanical accuracy when the optical disk rotates at high speed.

【0011】本発明の別の態様として、光ディスクの中
心部が金属ハブからなり、その金属ハブの周辺部が二枚
の透明基板間に把持されている光ディスク構造体があげ
られる。その一例の断面図を図3に示した。本発明の光
ディスク構造体は、たとえば、厚さ0.3〜0.9mm
の透明基板の片面に情報記録層を設けた光ディスク単体
の情報記録層を有する面に、該光ディスク単体の内径と
等しいかそれより大きい内径を有し、かつ当該光ディス
クの外径と等しいかそれより小さい外径を有する、当該
光ディスク単体と中心を同じくするドーナツ状シ−トを
粘着させ、その上に上記と同じ構造を有する光ディスク
単体の情報記録層を粘着させることにより製造できる。
すなわち、ドーナツ状シートの内径および外径の大きさ
は、当該光ディスク単体と同じ中心を持ち、かつ当該光
ディスクの内径から外径の範囲であれば任意に選定する
ことができ、当該光ディスク単体の反り精度等に応じ
て、たとえば内周部分のみ、あるいは内周部分と外周部
分というように複数用いることもできる。両面粘着シ−
トの表面には、あらかじめ粘着防止フィルムを貼付して
おき、機械的に位置決めして、当該粘着防止フィルムを
機械的に剥がして、情報記録層と粘着させることができ
る。金属ハブを有する光ディスクの場合は、たとえば光
ディスク単体作製時にその中心部に金属ハブを接着した
のち、図3に示すように情報記録層より内径だけが小さ
いドーナツ状の両面粘着シートを用いて、情報記録層を
対向させて二枚の光ディスク単体を金属ハブの内周辺部
で接着することにより製造することができる。
Another aspect of the present invention is an optical disk structure in which the center part of the optical disk is a metal hub, and the peripheral part of the metal hub is held between two transparent substrates. A cross-sectional view of an example thereof is shown in FIG. The optical disc structure of the present invention has, for example, a thickness of 0.3 to 0.9 mm.
On the surface having the information recording layer of the optical disk unit having the information recording layer provided on one surface of the transparent substrate, having an inner diameter equal to or larger than the inner diameter of the optical disk unit and equal to or larger than the outer diameter of the optical disk. It can be manufactured by adhering a doughnut-shaped sheet having a small outer diameter and having the same center as that of the optical disc, and then adhering an information recording layer of the optical disc having the same structure as above.
That is, the inner diameter and the outer diameter of the donut-shaped sheet can be arbitrarily selected as long as they have the same center as that of the single optical disk and are in the range from the inner diameter to the outer diameter of the optical disk. Depending on the precision and the like, it is possible to use a plurality of parts such as only the inner peripheral part or the inner peripheral part and the outer peripheral part. Double-sided adhesive sheet
An anti-adhesion film can be attached to the surface of the sheet in advance, the mechanical positioning can be performed, and the anti-adhesion film can be mechanically peeled off to adhere to the information recording layer. In the case of an optical disc having a metal hub, for example, after the metal hub is adhered to the center portion of the optical disc when it is manufactured, a donut-shaped double-sided adhesive sheet having an inner diameter smaller than that of the information recording layer is used as shown in FIG. It can be manufactured by making the recording layers face each other and adhering the two optical discs alone at the inner peripheral portion of the metal hub.

【0012】[0012]

【実施例】以下、本発明を実施例により詳細に説明する
が、本発明はこの実施例に限定されるものではない。
EXAMPLES The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples.

【0013】[0013]

【実施例1】射出成形法により成形した、厚さ0.6m
m、外径86mm、内径15mm、1.0μmトラック
ピッチのスパイラルグル−ブ付きポリカ−ボネ−ト樹脂
基板上に、ZnS−SiO2 誘電体層、GeTeSb記
録膜層、ZnS−SiO2 誘電体層、Al合金反射層を
順次スパッタ法にて積層した後、さらにその上側に紫外
線硬化樹脂をスピンコ−トにより塗膜し、紫外線を照射
して硬化させ、相変化型光ディスク単体を作製した。
Example 1 Molded by injection molding method, thickness 0.6 m
m, outer diameter 86 mm, inner diameter 15 mm, 1.0 μm track pitch on a polycarbonate resin substrate with spiral groove, ZnS-SiO2 dielectric layer, GeTeSb recording film layer, ZnS-SiO2 dielectric layer, Al After the alloy reflection layers were sequentially laminated by the sputtering method, a UV-curable resin was coated on the upper side by a spin coat and irradiated with UV rays to be cured to prepare a single phase-change optical disc.

【0014】次に、この光ディスク単体2枚を、記録膜
面を内側になるように対向させて、厚さ0.07mmの
ポリエステル系不織布を支持材とし、その両側に、厚さ
0.015mmのアクリル樹脂系粘着剤を設けた両面粘
着シ−トで張り合わせることにより、全面密着構造の相
変化型光ディスク構造体を作製した。なお、両面粘着シ
−トの形状は、ポリカーボネート樹脂基板と中心を同じ
くするドーナツ状であり、内径は該基板より0.1mm
大きく、また外径は成形基板より0.1mm小さいもの
とした。この光ディスク構造体を20枚作製し、機械的
精度を測定した。結果を表1に示す。測定には、静電容
量センサ−を組み込んだ波長685nmの半導体レ−
ザ、対物レンズの開口数NA0.6の光学ヘッドを用
い、ディスクの回転数は1800rpmとした。
Next, the two single optical discs are made to face each other with the recording film surfaces facing inward, and a polyester non-woven fabric having a thickness of 0.07 mm is used as a support material, and both sides thereof have a thickness of 0.015 mm. A phase-change type optical disc structure having a full-face contact structure was produced by laminating with a double-sided adhesive sheet provided with an acrylic resin adhesive. The shape of the double-sided adhesive sheet is a donut shape having the same center as the polycarbonate resin substrate, and the inner diameter is 0.1 mm from the substrate.
The diameter was large and the outer diameter was 0.1 mm smaller than the molded substrate. Twenty sheets of this optical disk structure were produced and the mechanical accuracy was measured. The results are shown in Table 1. For measurement, a semiconductor laser with a wavelength of 685 nm incorporating a capacitance sensor was used.
An optical head with a numerical aperture NA of 0.6 was used for the objective lens, and the rotation speed of the disk was 1800 rpm.

【0015】さらに、光ディスク構造体を80℃〜80
%RHの環境下に200時間滞留させた後、機械的精度
を測定した。結果を表2に示した。
Further, the optical disk structure is set at 80 ° C. to 80 ° C.
After being allowed to stay for 200 hours in an environment of% RH, the mechanical accuracy was measured. The results are shown in Table 2.

【0016】[0016]

【実施例2】実施例1で用いた基板とは内径部分の形状
が異なる、厚さ0.6mm、 外径86mm、内径15
mm、1.0μmトラックピッチを有するポリカ−ボネ
−ト樹脂基板上に、実施例1と同じ方法により相変化型
光ディスク単体を作製した。この光ディスク単体の中心
部分に、金属ハブを紫外線硬化樹脂を用いて接着した。
次に、中心部に金属ハブを有する光ディスク単体を、記
録膜面を内側になるように対向させて、実施例1と同様
な両面粘着シ−トを用いて貼り合わせた。得られた光デ
ィスク構造体の断面図は図3と同様である。
Example 2 The shape of the inner diameter portion is different from that of the substrate used in the first embodiment, the thickness is 0.6 mm, the outer diameter is 86 mm, and the inner diameter is 15 mm.
A phase-change type optical disk alone was manufactured by the same method as in Example 1 on a polycarbonate resin substrate having a track pitch of 1.0 mm and 1.0 mm. A metal hub was adhered to the central portion of the optical disk by using an ultraviolet curable resin.
Next, a single optical disk having a metal hub in the center was made to face each other with the recording film surface facing inward, and the same double-sided adhesive sheet as in Example 1 was used for bonding. The sectional view of the obtained optical disk structure is similar to that of FIG.

【0017】この光ディスク構造体を20枚作製し、実
施例1と同様な評価機にて機械的精度を測定した。結果
を表3にしめす。また、上記光ディスク構造体を、厚さ
2mmの塩化ビニル樹脂シ−ト上に、高さ76cmから
垂直に落下させた後機械的精度を測定したところ、精度
の悪化は認められず、記録再生特性にも、落下試験前後
で変化は認められなかった。
Twenty sheets of this optical disk structure were produced and the mechanical accuracy was measured by the same evaluation machine as in Example 1. The results are shown in Table 3. Further, when the optical disc structure was dropped vertically onto a vinyl chloride resin sheet having a thickness of 2 mm from a height of 76 cm, the mechanical precision was measured and no deterioration in precision was observed. However, no change was observed before and after the drop test.

【0018】さらに、上記ディスク構造体を80℃〜8
0%RHの環境下に200時間滞留させた後、機械的精
度を測定したが、ほとんど悪化はみられなかった。
Further, the above-mentioned disk structure is placed at 80 ° C to 8 ° C.
The mechanical accuracy was measured after the material was allowed to stay for 200 hours in an environment of 0% RH, but almost no deterioration was observed.

【0019】[0019]

【実施例3】射出成形法により成形した、厚さ0.6m
m、外径120mm、内径15mm、1.0μmトラッ
クピッチのスパイラルグル−ブ付きポリカ−ボネ−ト樹
脂基板上を用いた以外は実施例1と同様な方法により、
光ディスク構造体を作製した。
[Example 3] Molded by an injection molding method, a thickness of 0.6 m
m, outer diameter 120 mm, inner diameter 15 mm, 1.0 μm track pitch with a spiral grooved polycarbonate resin substrate.
An optical disc structure was produced.

【0020】この光ディスク構造体を15枚作製し、機
械的精度を測定した。結果を表4に示す。本発明光ディ
スク構造体は、120mm直径のディスクにも有効であ
ることが確認された。
Fifteen optical disk structures were prepared and the mechanical accuracy was measured. The results are shown in Table 4. It was confirmed that the optical disc structure of the present invention is also effective for a disc having a diameter of 120 mm.

【0021】[0021]

【表1】 [Table 1]

【0022】[0022]

【表2】 [Table 2]

【0023】[0023]

【表3】 [Table 3]

【0024】[0024]

【表4】 [Table 4]

【0025】[0025]

【発明の効果】本発明によれば、高密度、大容量で、高
速回転時にも十分な機械的精度を有する光ディスクが得
られる。また、高温・高湿下の加速試験においても、か
つディスクの落下試験においても、機械的精度は十分に
保持された。また、中心部に金属ハブが埋め込まれた光
ディスクにおいても、同様な効果が得られた。
According to the present invention, it is possible to obtain an optical disk having a high density and a large capacity, and having sufficient mechanical accuracy even at high speed rotation. Further, the mechanical accuracy was sufficiently maintained in both the accelerated test under high temperature and high humidity and the drop test of the disk. The same effect was also obtained with an optical disc having a metal hub embedded in the center.

【0026】さらに、本発明の方法によれば、薄い透明
基板を有する光ディスクの安定的製造が可能となり、高
速で量産することができるようになった。
Further, according to the method of the present invention, it becomes possible to stably manufacture an optical disk having a thin transparent substrate and mass produce it at a high speed.

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

【図1】本発明の光ディスク構造体の一例を示す断面図
である。
FIG. 1 is a sectional view showing an example of an optical disc structure of the present invention.

【図2】本発明の光ディスク構造体の一例を示す平面図
である。
FIG. 2 is a plan view showing an example of an optical disc structure of the present invention.

【図3】本発明の光ディスク構造体の別の例を示す断面
図である。
FIG. 3 is a sectional view showing another example of the optical disc structure of the present invention.

【符号の説明】[Explanation of symbols]

1 透明基板 2 情報記録層 3 粘着材層 4 有機材料系支持材層 5 両面粘着シ−ト 6 金属ハブ 1 Transparent Substrate 2 Information Recording Layer 3 Adhesive Layer 4 Organic Material Support Material Layer 5 Double-sided Adhesive Sheet 6 Metal Hub

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 厚さ0.3〜0.9mmの透明基板の片
面に情報記録層を設けた光ディスク単体上に、情報記録
層を有する面に接して、粘着材層、上記と同じ構造を有
する別の光ディスク単体の情報記録層および透明基板が
この順で積層されてなる光ディスク構造体。
1. A transparent substrate having a thickness of 0.3 to 0.9 mm and having an information recording layer provided on one surface thereof is provided on an optical disk unit, in contact with the surface having the information recording layer, an adhesive layer, and the same structure as above. An optical disk structure in which an information recording layer of another optical disk and a transparent substrate are laminated in this order.
【請求項2】 厚さ0.3〜0.9mmの透明基板の片
面に情報記録層を設けた光ディスク単体上に、情報記録
層を有する面に接して、粘着材層、有機材料系支持材
層、粘着材層、上記と同じ構造を有する別の光ディスク
単体の情報記録層および透明基板がこの順で積層されて
なる光ディスク構造体。
2. A transparent substrate having a thickness of 0.3 to 0.9 mm and having an information recording layer provided on one side thereof is provided on an optical disk alone, in contact with the surface having the information recording layer, an adhesive layer, an organic material-based support material. An optical disc structure in which a layer, an adhesive layer, an information recording layer of another optical disc having the same structure as above, and a transparent substrate are laminated in this order.
【請求項3】 粘着材層の厚さが0.005〜0.3m
m、有機材料系支持材層の厚さが0〜0.295mmで
あり、両者の合計の厚さが0.005〜0.3mm、両
者の厚さ合計のバラツキが平均厚さに対して±30%以
内である請求項1ないし2記載の光ディスク構造体。
3. The thickness of the adhesive layer is 0.005 to 0.3 m
m, the thickness of the organic material-based support material layer is 0 to 0.295 mm, the total thickness of both is 0.005 to 0.3 mm, and the variation in the total thickness of both is ± with respect to the average thickness. The optical disk structure according to claim 1, which is within 30%.
【請求項4】 光ディスクの中心部が金属ハブからな
り、その金属ハブの外周辺部が二枚の透明基板間に把持
されている請求項1または2の光ディスク構造体。
4. The optical disc structure according to claim 1, wherein the central portion of the optical disc comprises a metal hub, and the outer peripheral portion of the metal hub is held between two transparent substrates.
【請求項5】 厚さ0.3〜0.9mmの透明基板の片
面に情報記録層を設けた光ディスク単体の情報記録層を
有する面に、該光ディスク単体の内径と等しかそれより
大きい内径を有し、かつ当該光ディスクの外径と等しい
かそれより小さい外径を有する当該光ディスク単体と中
心を同じくするドーナツ状の両面粘着シ−トを粘着さ
せ、その上に上記と同じ構造を有する別の光ディスク単
体の情報記録層を粘着させることを特徴とする光ディス
ク構造体の製造方法。
5. A transparent substrate having a thickness of 0.3 to 0.9 mm and having an information recording layer provided on one surface thereof has an inner diameter larger than or equal to the inner diameter of the single optical disk on the surface having the information recording layer. And a doughnut-shaped double-sided adhesive sheet having the same center as the optical disk unit having an outer diameter equal to or smaller than the outer diameter of the optical disk, and having the same structure as the above. A method for manufacturing an optical disc structure, comprising adhering an information recording layer of a single optical disc.
JP6207131A 1994-08-31 1994-08-31 Optical disk structure and fabrication thereof Withdrawn JPH0877606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6207131A JPH0877606A (en) 1994-08-31 1994-08-31 Optical disk structure and fabrication thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6207131A JPH0877606A (en) 1994-08-31 1994-08-31 Optical disk structure and fabrication thereof

Publications (1)

Publication Number Publication Date
JPH0877606A true JPH0877606A (en) 1996-03-22

Family

ID=16534712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6207131A Withdrawn JPH0877606A (en) 1994-08-31 1994-08-31 Optical disk structure and fabrication thereof

Country Status (1)

Country Link
JP (1) JPH0877606A (en)

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