JPH0421936B2 - - Google Patents
Info
- Publication number
- JPH0421936B2 JPH0421936B2 JP56057890A JP5789081A JPH0421936B2 JP H0421936 B2 JPH0421936 B2 JP H0421936B2 JP 56057890 A JP56057890 A JP 56057890A JP 5789081 A JP5789081 A JP 5789081A JP H0421936 B2 JPH0421936 B2 JP H0421936B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- information
- thickness
- intermediate protective
- information forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010410 layer Substances 0.000 claims description 60
- 239000011241 protective layer Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 21
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 230000010365 information processing Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000011368 organic material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25706—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing transition metal elements (Zn, Fe, Co, Ni, Pt)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25708—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 13 elements (B, Al, Ga)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/2571—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 14 elements except carbon (Si, Ge, Sn, Pb)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25715—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing oxygen
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25716—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing sulfur
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B7/2578—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、たとえば集光したレーザ光により記
録層に対してピツト形成等の状態変化を生じさせ
ることにより光学的情報を記録し、また、この情
報を読取り得る光デイスク、もしくは光反射層に
形成された凹凸等の光学的情報に集光した光を照
射してその反射光から上記情報を再生し得るビデ
イオデイスクとして適応し得る情報記録媒体に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disk in which optical information is recorded by causing a state change such as the formation of pits in a recording layer using a focused laser beam, and in which this information can be read. Alternatively, the present invention relates to an information recording medium that can be used as a video disc that can reproduce the information from the reflected light by irradiating optical information such as irregularities formed on a light reflecting layer with focused light.
近年、光デイスクメモリは高密度記録（現状で
磁気メモリの数十倍から百倍の記録密度を有し、
トラツク幅1μｍ以下、トラツクピツチ2μｍ以下
の高密度で情報を記録し、再生でき、直径30cmの
デイスク１枚で５万トラツク、1010ビツトの容量
を実現している。）が行える。また、この他に、
非接触記録再生ができる。高速のランダムアクセ
スが可能。長期保存性に優れている。記録方式が
容易。追加記録が可能。１ビツト当りのコストが
安い。等の特徴を有するところから、記録再生用
あるいは再生専用として広く応用されている。再
生専用型の応用方面としては家庭用ビデイオデイ
スク、業務用ビデイオデイスク、オーデイオ
PCMデイスク等があり、また、記録再生型の応
用方面としてはドキユメントフアイル、ビデイオ
フアイル、計算機汎用メモリ等があげられる。 In recent years, optical disk memory has been developed with high-density recording (currently, it has a recording density of several tens to a hundred times that of magnetic memory,
Information can be recorded and reproduced at a high density with a track width of less than 1 μm and a track pitch of less than 2 μm, and a single 30 cm diameter disk has a capacity of 50,000 tracks and 1010 bits. ) can be performed. In addition to this,
Non-contact recording and playback is possible. High-speed random access is possible. Excellent long-term storage. Easy recording method. Additional recording is possible. The cost per bit is low. Because of these characteristics, it is widely used for recording and reproduction or for reproduction only. Applications for playback-only types include home video discs, commercial video discs, and audio discs.
There are PCM disks, etc., and recording/reproducing type applications include document files, video files, computer general-purpose memory, etc.
従来、この種情報処理装置に使用される情報記
憶媒体としては、透明プラスチツク板もしくはガ
ラス板に有機物質より作られる信号情報ないしは
トラツキングガイドを持つ表面凹凸層を形成して
なる板体等からなる基板の片面に記録層ないしは
光反射層からなる情報形成層を直接形成し、この
情報形成層を形成した２枚の基板を上記情報形成
層が内側に位置する状態に接着剤にて全面に亘つ
て貼合せたものが存在するが、この情報記憶媒体
についてはエアーサンドイツチ型のものより機械
的強度が向上するというもののつぎのような問題
点がある。 Conventionally, the information storage medium used in this type of information processing device consists of a plate made of a transparent plastic plate or a glass plate on which a surface roughness layer having signal information or tracking guides made of an organic substance is formed. An information forming layer consisting of a recording layer or a light reflecting layer is directly formed on one side of the substrate, and the two substrates on which this information forming layer is formed are glued over the entire surface with the information forming layer located inside. There is a type of information storage medium that is laminated with a thin film, but although this information storage medium has better mechanical strength than the air sandwich type, it has the following problems.
すなわち、この情報記憶媒体においては、情報
形成層が直接有機物層に挾まれた状態となつてお
り、大気中の酸素や水が容易に基板を透過して情
報形成層側に浸入したり、有機物で形成される基
板（もしくは表面凹凸層）、および接着剤層内に
含まれている不純物原子がイオン化してドリフト
し、情報形成層内に浸入することによつて情報形
成層の劣化を促進させて光反射率、光吸収率の低
下による感度不良をまねくことがある。 In other words, in this information storage medium, the information formation layer is directly sandwiched between the organic material layers, and oxygen and water in the atmosphere can easily pass through the substrate and enter the information formation layer side, and organic materials can easily pass through the substrate. The impurity atoms contained in the substrate (or surface unevenness layer) formed with the adhesive layer and the adhesive layer become ionized and drift, and penetrate into the information formation layer, thereby promoting the deterioration of the information formation layer. This may lead to poor sensitivity due to a decrease in light reflectance and light absorption.
また、情報形成層とこの情報形成層に直接接し
ている各有機物質との熱膨張率が異なるためヒー
トサイクルがかけられることによつて両者の間に
歪が生じ、情報形成層内にピンホールが発生し易
くなる。 In addition, since the thermal expansion coefficients of the information forming layer and the organic substances that are in direct contact with the information forming layer are different, distortion occurs between the two when heat cycles are applied, causing pinholes in the information forming layer. is more likely to occur.
また、情報形成層に直接接している各有機物層
が水分を吸収するために膨潤し、情形成層内にピ
ンホールが発生し易くなるといつた問題を有して
いる。 Another problem is that each organic layer in direct contact with the information forming layer absorbs moisture and swells, making pinholes more likely to occur in the information forming layer.
本発明は、上記事情にもとづきなされたもの
で、その目的とするところは、情報形成層の両面
にそれぞれ接触する状態に第１、第２の中間保護
層を形成することにより、情報形成層の早期劣
化、ピンホール発生等を防止し、長期に亘つて安
定した情報処理を行うことができるようにした信
頼度の高い情報記録媒体を提供しようとするもの
である。 The present invention has been made based on the above-mentioned circumstances, and an object thereof is to form a first and a second intermediate protective layer in contact with both surfaces of the information forming layer, so that the information forming layer can be protected. The present invention aims to provide a highly reliable information recording medium that prevents early deterioration, pinhole generation, etc., and enables stable information processing over a long period of time.
以下、本発明の一実施例の基本構成を第１図を
参照して説明する。図中１，１はいくらかでも親
水性があり、微視的に見て表面に分極のある基板
であり、これら基板１，１の片面にはそれぞれ第
１の中間保護層２が形成され、さらに、この上に
たとえばTeないしはAl等のヒートモードの金属
薄膜等から構成される記録層ないしは光反射層か
らなる情報形成層３および第２の中間保護層４が
形成された構造となつている。そして、これら第
１の中間保護層２、情報形成層３および第２の中
間保護層４を順次形成した２枚の基板１，１を上
記第２の中間保護層４，４が互いに内側に位置す
る状態に接着剤層５を介して貼合せるとともに中
心部に回転中心孔を有した円板状とすることによ
り情報記録媒体６を構成している。 Hereinafter, the basic configuration of an embodiment of the present invention will be explained with reference to FIG. In the figure, 1 and 1 are substrates that are somewhat hydrophilic and polarized on the surface when viewed microscopically, and a first intermediate protective layer 2 is formed on one side of each of these substrates 1 and 1. On top of this, an information forming layer 3 consisting of a recording layer or a light reflecting layer made of a heat mode metal thin film such as Te or Al, and a second intermediate protective layer 4 are formed. Then, the two substrates 1, 1 on which the first intermediate protective layer 2, the information forming layer 3, and the second intermediate protective layer 4 are sequentially formed are placed so that the second intermediate protective layers 4, 4 are positioned inside each other. The information recording medium 6 is constructed by bonding the media through an adhesive layer 5 and forming a disk shape with a rotation center hole in the center.
上記第１、第２の中間保護層２，２，４，４は
酸素や水の浸入を防止する物質たとえばZn、
Mg、Al、Si、Zr、Ce、In、Ti、Te、Ge、Ni、
Nbの酸化物及びMg、Ca、Ceの弗化物等の透明
無機物のいずれかを用いる。また、これらのうち
SiO、SiO2、NiO、TiO2、MgO、MgF2などの膜
は緻密であり、酸素や水がより透過しにくいため
より好ましい。 The first and second intermediate protective layers 2, 2, 4, 4 are made of a material that prevents oxygen and water from entering, such as Zn,
Mg, Al, Si, Zr, Ce, In, Ti, Te, Ge, Ni,
Either a transparent inorganic substance such as an oxide of Nb or a fluoride of Mg, Ca, or Ce is used. Also, among these
Films made of SiO, SiO 2 , NiO, TiO 2 , MgO, MgF 2 and the like are dense and more difficult for oxygen and water to permeate, so they are more preferable.
上記基板基板１，１の厚みは情報記録媒体６の
表面に微細なごみが付着しても書込み、読出し等
の情報処理に支障がないように0.3mm以上必要で
あり、また、絞り込みレンズによりレーザ光を収
束するためには５mm以下であることが望ましく、
強度、経済性等を加味して厚さ1.0〜1.55mmのた
とえば透明アクリル板が適当である。 The thickness of the substrates 1, 1 is required to be 0.3 mm or more so that even if minute dust adheres to the surface of the information recording medium 6, information processing such as writing and reading will not be hindered. In order to converge, it is desirable that it is 5 mm or less,
For example, a transparent acrylic plate having a thickness of 1.0 to 1.55 mm is suitable in consideration of strength, economy, etc.
また、第１、第２の中間保護層２，２，４，４
はそれぞれ同じ材質の無機物質よりなり、第１の
中間保護層２，２は真空蒸着ないしはスパツタ蒸
着により50〜1000Åの厚さに、また、第２の中間
保護層４，４は100〜3000Å程度の厚さに形成さ
れている。上記情報形成層３，３はたとえばTe
とする場合には500Åの厚さに真空蒸着法によつ
て形成する。 In addition, the first and second intermediate protective layers 2, 2, 4, 4
are made of the same inorganic material, the first intermediate protective layers 2, 2 are formed to a thickness of 50 to 1000 Å by vacuum deposition or sputter deposition, and the second intermediate protective layers 4 are formed to a thickness of approximately 100 to 3000 Å. It is formed to a thickness of . The information forming layers 3, 3 are, for example, Te
In this case, it is formed to a thickness of 500 Å by vacuum evaporation.
また、接着剤層５としてはエポキシ系接着剤
（セメダイン1565）等を50〜300μｍの厚さに形成
するようになつている。 The adhesive layer 5 is made of an epoxy adhesive (CEMEDINE 1565) or the like and has a thickness of 50 to 300 μm.
しかして、情報形成層３の両面に無機物質から
なる第１、第２の中間保護層２，４を接触する状
態に形成したから、２層の情報形成層３，３は酸
素や水、および基板１や接着剤層５に含まれる不
純物原子がイオン化してドリフトして浸入するこ
とによる早期劣化、ピンホール発生等を防止でき
る。 Since the first and second intermediate protective layers 2 and 4 made of an inorganic substance are formed on both sides of the information forming layer 3 in a state where they are in contact with each other, the two information forming layers 3 and 3 are free from oxygen, water, and It is possible to prevent early deterioration, pinhole generation, etc. due to impurity atoms contained in the substrate 1 and the adhesive layer 5 being ionized, drifting, and penetrating.
また、第１の中間保護層２、情報成形層３およ
び第２の中間保護層４はともに無機物質より形成
されているため基板１を真空槽に入れた後は、真
空を破らずに上記３層を同一真空雰囲気において
順次形成することができ、効率良く製造できる。 In addition, since the first intermediate protective layer 2, the information forming layer 3, and the second intermediate protective layer 4 are all formed of inorganic materials, after the substrate 1 is placed in the vacuum chamber, the above-mentioned three The layers can be sequentially formed in the same vacuum atmosphere, resulting in efficient manufacturing.
また、第１、第２の中間保護層２，４は同じ材
質であるため２種類の素材を準備するだけで情報
形成層３も含めた３層を形成することができ、製
造効率が比較的高く、生産コストがそれほど高く
なるようなことがない。 In addition, since the first and second intermediate protective layers 2 and 4 are made of the same material, three layers including the information forming layer 3 can be formed by simply preparing two types of materials, making the manufacturing efficiency relatively high. However, the production cost will not be that high.
また、基板１と接着剤層５はともに有機物質で
できているため、情報形成層３に直接それらが接
触していると記録時に情報形成層３が発生する熱
によつて基板１、接着剤層５が局部的に変形する
ことがあるが第１、第２の中間保護層２，４がそ
れを緩和する熱的バリヤになる。 Furthermore, since both the substrate 1 and the adhesive layer 5 are made of organic materials, if they are in direct contact with the information forming layer 3, the heat generated by the information forming layer 3 during recording will cause the substrate 1 and the adhesive to Although the layer 5 may be locally deformed, the first and second intermediate protective layers 2 and 4 act as thermal barriers to alleviate this.
また、情報形成層３と基板１、接着剤層５との
間に吸水、温度により生じる膨張率の違いによる
歪みを第１、第２の中間保護層２，４によつて緩
和されることになる。 In addition, distortion due to differences in expansion coefficients caused by water absorption and temperature between the information forming layer 3, the substrate 1, and the adhesive layer 5 is alleviated by the first and second intermediate protective layers 2 and 4. Become.
また、本発明は、第２図に示すような構成とな
つている。 Further, the present invention has a configuration as shown in FIG.
すなわち、厚さが1.0〜1.5mmの２枚の透明基板
１のそれぞれの平面に、信号情報ないしはトラツ
キングガイドとなる表面凹凸層７と、厚さが50〜
1000Åの第１の中間保護層２と、厚さが500Åの
記録層ないしは光反射層からなる情報形成層３
と、厚さが50〜1000Åで反情報形成層側が平滑面
となる第２の中間保護層４とを順次積層し、上記
第２の中間保護層４を内側にして厚さが50〜
300μｍの接着剤層５を介して接着してなる。 That is, on each plane of two transparent substrates 1 with a thickness of 1.0 to 1.5 mm, there is a surface unevenness layer 7 that serves as signal information or a tracking guide, and a layer with a thickness of 50 mm to 1.5 mm.
An information forming layer 3 consisting of a first intermediate protective layer 2 with a thickness of 1000 Å and a recording layer or a light reflecting layer with a thickness of 500 Å.
and a second intermediate protective layer 4 with a thickness of 50 to 1000 Å and a smooth surface on the side opposite to the information forming layer, and a layer with a thickness of 50 to 1000 Å with the second intermediate protective layer 4 on the inside.
It is bonded via an adhesive layer 5 of 300 μm.
表面凹凸層７は、ホトポリマー等の有機物質に
より作られる。 The surface unevenness layer 7 is made of an organic material such as a photopolymer.
本発明は、以上説明したように、情報形成層の
両面に接触する状態に第１、第２の中間保護層を
形成したから、情報形成層の酸素や水、および基
板や接着剤などに含まれる不純物原子がイオン化
してドリフトして侵入することによつて生じる早
期劣化、ピンホール発生等を防止し、長期に亘つ
て安定した情報処理を行うことができる信頼度の
高い情報記録媒体を提供できる。 As explained above, in the present invention, since the first and second intermediate protective layers are formed in contact with both surfaces of the information forming layer, oxygen and water in the information forming layer, as well as in the substrate and adhesive, can be absorbed. Providing highly reliable information recording media that can perform stable information processing over a long period of time by preventing early deterioration and pinhole formation caused by impurity atoms ionizing and drifting into the media. can.
また、透明基板の厚さが1.0〜1.5mm、第１の中
間保護層の厚さが50〜1000Å、情報形成層の厚さ
が500Å、第２の中間保護層の厚さが50〜1000Å、
接着剤層の厚さが50〜300μｍとしたから、信号
情報ないしはトラツキングガイドを持ち、しかも
両面使用可能な情報記録媒体でありながらの実用
的な厚さとすることができる。 Further, the thickness of the transparent substrate is 1.0 to 1.5 mm, the thickness of the first intermediate protective layer is 50 to 1000 Å, the thickness of the information forming layer is 500 Å, the thickness of the second intermediate protective layer is 50 to 1000 Å,
Since the adhesive layer has a thickness of 50 to 300 μm, it can have a practical thickness while being an information recording medium that has signal information or a tracking guide and can be used on both sides.
また、第２の中間保護層の反情報形成層側、す
なわち、接着剤層側が平滑面となるため、表面凹
凸層を備えた２枚の基板の平行度等が損なわれる
こと無く確実に接着できるといつた効果を奏す
る。 In addition, since the second intermediate protective layer has a smooth surface on the side opposite to the information formation layer, that is, on the adhesive layer side, it is possible to reliably bond the two substrates with the uneven surface layer without impairing their parallelism. It has the same effect.
第１図は本発明の一実施例を示す基本構成説明
図、第２図は本発明の変形例を示す基本構成説明
図である。
１……基板、２……第１の中間保護層、３……
記録層ないしは光反射層からなる情報形成層、４
……第２の中間保護層、５……接着剤層、６……
情報記憶媒体、７……信号情報ないしはトラツキ
ングガイドを持つ表面凹凸層。
FIG. 1 is a basic configuration explanatory diagram showing an embodiment of the present invention, and FIG. 2 is a basic configuration explanatory diagram showing a modified example of the present invention. 1... Substrate, 2... First intermediate protective layer, 3...
Information forming layer consisting of a recording layer or a light reflecting layer, 4
...Second intermediate protective layer, 5...Adhesive layer, 6...
Information storage medium, 7... surface uneven layer having signal information or tracking guide.
Claims (1)
射することにより少なくとも情報形成層に形成さ
れた情報の読取りが行えるようにした情報記憶媒
体であつて、 厚さが1.0〜1.5mmの２枚の透明基板のそれぞれ
の片面に、信号情報ないしはトラツキングガイド
を持ち基板側が平滑面となる表面凹凸層と、厚さ
が50〜1000Åの第１の中間保護層と、厚さが500
Åの記録層ないしは光反射層からなる情報形成層
と、厚さが50〜1000Åで、反情報形成層側が平滑
面となる第２の中間保護層とを順次積層し、上記
第２の中間保護層を内則にして厚さが50〜300μ
ｍの接着剤層を介して接着してなることを特徴と
する情報記憶媒体。[Scope of Claims] 1. An information storage medium in which at least information formed on the information formation layer can be read by irradiating the information formation layer with a focused laser beam, etc., which has a thickness of On one side of each of two transparent substrates of 1.0 to 1.5 mm, a surface unevenness layer having signal information or a tracking guide and a smooth surface on the substrate side, and a first intermediate protective layer with a thickness of 50 to 1000 Å, Thickness is 500
An information forming layer consisting of a recording layer or a light reflecting layer with a thickness of 50 to 1000 Å and a second intermediate protective layer having a smooth surface on the side opposite to the information forming layer are sequentially laminated to form the second intermediate protective layer. The thickness is 50 to 300μ based on the inner layer.
An information storage medium characterized in that the information storage medium is adhesively bonded through an adhesive layer of m.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56057890A JPS57172547A (en) | 1981-04-17 | 1981-04-17 | Information storage medium |
| US06/368,088 US4449138A (en) | 1981-04-15 | 1982-04-13 | Information recording medium |
| NL8201556A NL8201556A (en) | 1981-04-15 | 1982-04-14 | REGISTRATION MEDIUM FOR INFORMATION. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56057890A JPS57172547A (en) | 1981-04-17 | 1981-04-17 | Information storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57172547A JPS57172547A (en) | 1982-10-23 |
| JPH0421936B2 true JPH0421936B2 (en) | 1992-04-14 |
Family
ID=13068576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56057890A Granted JPS57172547A (en) | 1981-04-15 | 1981-04-17 | Information storage medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57172547A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996544A (en) * | 1982-11-24 | 1984-06-04 | Sony Corp | Optical information recording medium |
| JPS6010431A (en) * | 1983-06-29 | 1985-01-19 | Canon Inc | Optical recording medium |
| JPS6134745A (en) * | 1984-07-26 | 1986-02-19 | Canon Inc | Photoelectromagnetic recording medium |
| KR100264705B1 (en) * | 1989-01-11 | 2000-09-01 | 야스카와 히데아키 | Optical disk and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146221A (en) * | 1976-05-31 | 1977-12-05 | Asahi Chemical Ind | Image forming material |
| JPS553971A (en) * | 1978-06-26 | 1980-01-12 | Fuji Photo Film Co Ltd | Thermal recording material |
-
1981
- 1981-04-17 JP JP56057890A patent/JPS57172547A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146221A (en) * | 1976-05-31 | 1977-12-05 | Asahi Chemical Ind | Image forming material |
| JPS553971A (en) * | 1978-06-26 | 1980-01-12 | Fuji Photo Film Co Ltd | Thermal recording material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57172547A (en) | 1982-10-23 |
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