JPH1139710A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPH1139710A JPH1139710A JP10130781A JP13078198A JPH1139710A JP H1139710 A JPH1139710 A JP H1139710A JP 10130781 A JP10130781 A JP 10130781A JP 13078198 A JP13078198 A JP 13078198A JP H1139710 A JPH1139710 A JP H1139710A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- recording layer
- wavelength
- light
- 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
Links
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
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24038—Multiple laminated recording layers
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/0079—Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
-
- 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
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24047—Substrates
-
- 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
-
- 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
- G11B7/258—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 reflective layers
- G11B7/2585—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 reflective layers based on aluminium
-
- 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
- G11B2007/2571—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
- G11B2007/25713—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 nitrogen
-
- 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
- G11B2007/25718—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 halides (F, Cl, Br, l)
-
- 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
-
- 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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24079—Width or depth
-
- 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
-
- 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
- G11B7/253—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 substrates
- G11B7/2533—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 substrates comprising resins
- G11B7/2534—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 substrates comprising resins polycarbonates [PC]
-
- 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
- G11B7/256—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 improving adhesion between layers
-
- 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
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は二層またはその以上
の情報記録層を有する光ディスクに係り、特に相異なる
フォーマットを有するディスクプレーヤーに互換採用し
うる光ディスクに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc having two or more information recording layers, and more particularly to an optical disc compatible with disc players having different formats.
【０００２】[0002]
【従来の技術】一般に、１枚の光ディスクに記録される
情報記録容量を増大させるための手段として光ディスク
は二層またはその以上の情報記録層を含むように多層化
されている。2. Description of the Related Art Generally, an optical disk is multi-layered so as to include two or more information recording layers as a means for increasing the information recording capacity recorded on one optical disk.
【０００３】従来の二層光ディスクの一例を図1に基づ
き説明する。示されたように、光の照射される側から、
透明な第1基板11、情報記録面を有する第1記録層13、第
1接合層15、スペーサ17、第2接合層19、第2記録層21及
び第2基板23で構成される。第1基板11は、1ｍｍの厚さ
の透明なPVCからなっており、入射光を透過させる。第1
記録層13は、紫外線硬化樹脂からなっており、前記第1
基板11の一側に形成される。この第1記録層13には螺旋
状のトラックを成すランド13aと、溝13bが形成されてい
る。前記第1記録層13の第1接合層15側の面14には入射光
を部分的に透過させうる半透膜が形成されている。この
半透膜としてはZnSe(zinc selenide)、BiO(bismuth oxi
de)、CdS(cadmium sulphide)、CdTe(cadmium tellurid
e)、SiC(silicon carbide)などが提案される。An example of a conventional double-layer optical disc will be described with reference to FIG. As shown, from the side where light is irradiated,
A transparent first substrate 11, a first recording layer 13 having an information recording surface,
It is composed of one bonding layer 15, spacer 17, second bonding layer 19, second recording layer 21, and second substrate 23. The first substrate 11 is made of transparent PVC having a thickness of 1 mm, and transmits incident light. First
The recording layer 13 is made of an ultraviolet curable resin,
It is formed on one side of the substrate 11. In the first recording layer 13, a land 13a forming a spiral track and a groove 13b are formed. On the surface 14 of the first recording layer 13 on the first bonding layer 15 side, a semi-permeable film capable of partially transmitting incident light is formed. As this semipermeable membrane, ZnSe (zinc selenide), BiO (bismuth oxi
de), CdS (cadmium sulphide), CdTe (cadmium tellurid
e), silicon carbide (SiC) and the like are proposed.
【０００４】また、前記第2記録層21は前記第1記録層13
と同一な構成を有し、第2接合層19との対向面20は略90
％の反射率を有する反射層が形成されている。前記第1
及び第2接合層15、19と前記スペーサ17は前記第1記録層
13と第2記録層21との接合及び間隔を保つためのもので
あって、入射光を透過させる。前記第2基板23は透明なP
VCよりなる基板で前記第2記録層21を保護する。[0004] The second recording layer 21 is provided on the first recording layer 13.
And the surface 20 facing the second bonding layer 19 is substantially 90
% Is formed on the reflective layer. The first
And the second bonding layers 15, 19 and the spacer 17 are the first recording layer
This is for maintaining the junction between the second recording layer 21 and the gap and for transmitting the incident light. The second substrate 23 is made of transparent P
The second recording layer 21 is protected by a substrate made of VC.
【０００５】前記したように構成された光ディスクに記
録された情報の再生は、第1基板11側から入射される対
物レンズ3により集束されたビーム1を用いて行われる。
つまり、対物レンズ3のフォーカス位置を調整して集束
されたビーム1が第1記録層13に集束させて第1記録層13
に記録された情報を再生し、対物レンズ3のフォーカス
位置を調整して第2記録層21にビーム1'を集束させて第2
記録層21に記録された情報を再生しうる。[0005] Reproduction of information recorded on the optical disk configured as described above is performed using the beam 1 focused by the objective lens 3 incident from the first substrate 11 side.
That is, the focused beam 1 adjusted by adjusting the focus position of the objective lens 3 is focused on the first recording layer 13 and
The information recorded on the second recording layer 21 is reproduced, and the focus position of the objective lens 3 is adjusted to focus the beam 1 ′ on the second recording layer 21.
Information recorded on the recording layer 21 can be reproduced.
【０００６】前記したように、構成された光ディスクは
2階の記録層13、21を含んで情報記録密度を高容量化し
うる利点があり、何れか一種のディスクプレーヤー、例
えば650ｎｍ波長の光を使用するデジタル多機能ディス
クロム(DVD-ROM)プレーヤーに採用される。[0006] As described above, the optical disk constructed is
There is an advantage that the information recording density can be increased by including the recording layers 13 and 21 on the second floor, and any kind of disc player, for example, a digital multifunctional disc chrome (DVD-ROM) player using light of 650 nm wavelength. Adopted.
【０００７】一方、最近のディスクプレーヤーの技術分
野において、高音質、高画質及び高容量化の可能な新た
な規格のデジタル多機能ディスクプレーヤー(DVDP)が登
場している。このDVDPは、CDPとは異なり、光源として6
50ｎｍの波長の光を出射するレーザーを採用し、開口数
0.6の対物レンズに標準化された。また、DVDP専用の光
ディスク(DVD）の規格において、一般のCDの入射面と情
報面との間の厚さが1.2ｍｍのラックピッチが1.6μmで
ある反面、厚さ0.6ｍｍでトラックピッチが0.74μmに標
準化された。On the other hand, in the recent disc player technical field, a digital multifunctional disc player (DVDP) of a new standard capable of achieving high sound quality, high picture quality and high capacity has appeared. This DVDP, unlike the CDP,
Uses a laser that emits light with a wavelength of 50 nm and has a numerical aperture
Standardized to 0.6 objective. Also, in the standard of an optical disk (DVD) dedicated to DVDP, the rack pitch between the incident surface and the information surface of a general CD is 1.2 mm and the rack pitch is 1.6 μm, but the track pitch is 0.64 mm and the track pitch is 0.74 mm. Standardized to μm.
【０００８】前記したDVDPは広く普及されたCDP用光デ
ィスク(CD)を互換採用可能に多様な形に開発されている
ため、CDに記録された情報の再生はCDPのみならず、DVD
Pにも再生可能である。しかし、DVDはその規格がCDと相
異なるので記録された情報を前記CDPを用いて再生出来
ないとの問題点がある。Since the above-mentioned DVDP has been developed in various forms so as to be compatible with widely used optical discs for CDP (CD), the information recorded on the CD can be reproduced not only by the CDP but also by the DVDP.
P can also be played. However, the DVD has a problem that the recorded information cannot be reproduced using the CDP because the standard is different from that of the CD.
【０００９】[0009]
【発明が解決しようとする課題】本発明は前記問題点を
解決するために案出されたものであって、相異なるフォ
ーマットを有するディスクプレーヤーに互換採用可能な
二層またはその以上の記録層を有する光ディスクを提供
するにその目的がある。SUMMARY OF THE INVENTION The present invention has been devised to solve the above problems, and has two or more recording layers compatible with disc players having different formats. The purpose is to provide an optical disk having the same.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成するため
に本発明は、入射光の透過される透明基板と、情報信号
の記録される情報記録面を有し、記録された情報が第1
波長の光により再生される第1記録層と、入射光を、波
長領域に応じて光の透過率を異にして前記第1波長の光
は大部反射させ、第2波長の光は大部透過させる半透膜
と、前記半透膜を透過した光が透過され、間隔を保つス
ペーサと、情報信号の記録される情報記録面を有し、記
録された情報が前記半透膜を透過した第2波長の光によ
り再生される第2記録層と、前記スペーサと第2記録層と
の間に形成され、前記第2記録層の情報記録面に集束さ
れた光を反射させる反射膜を含んで相異なるフォーマッ
トを有する光ディスクプレーヤーに互換採用しうること
を特徴とする。In order to achieve the above object, the present invention provides a transparent substrate through which incident light is transmitted, and an information recording surface on which an information signal is recorded.
The first recording layer reproduced by the light of the wavelength, the incident light, the light of the first wavelength is largely reflected with different light transmittance according to the wavelength region, and the light of the second wavelength is largely reflected. A semi-permeable membrane to be transmitted, light having passed through the semi-permeable membrane, a spacer for keeping an interval, and an information recording surface on which an information signal is recorded, and the recorded information has passed through the semi-permeable membrane. A second recording layer that is reproduced by light of a second wavelength, and a reflection film formed between the spacer and the second recording layer and reflecting light focused on the information recording surface of the second recording layer. And compatible with optical disc players having different formats.
【００１１】[0011]
【発明の実施の形態】以下、添付した図面に基づき本発
明の実施の形態について詳しく説明する。図2を参照す
れば、本発明の一実施の形態として示した光ディスク
は、光(L）の照射される方向から順次に、透明基板31、
第1記録層33、半透膜35、スペーサ39、反射膜43、第2記
録層45及び保護層47で構成される。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Referring to FIG. 2, the optical disc shown as an embodiment of the present invention includes a transparent substrate 31 and a
It comprises a first recording layer 33, a semi-permeable film 35, a spacer 39, a reflective film 43, a second recording layer 45, and a protective layer 47.
【００１２】前記透明基板31は入射光(L）の透過される
層に前記第1記録層33を保護する。前記透明基板31は通
常の光ディスクと同様に透明なPVC等で製作される。前
記第1記録層33は情報の記録される情報記録面34を有
し、この情報記録面34に記録された情報は入射される第
1波長の光により再生される。前記第1波長は約650ｎｍ
の波長を意味し、前記第1記録層33は通常のデジタル多
機能ディスクの情報記録層に該当する。第1記録層33の
情報記録面34にはトラックを成すように螺旋状のランド
34aと、ピット34bが形成されている。ここで、前記第1
記録層33のトラックピッチは約0.74μmであり、前記透
明基板31の光入射面31aと前記第1記録層33の情報記録面
34との間の間隔T1は約0.6ｍｍであることが望ましい。The transparent substrate 31 protects the first recording layer 33 by a layer through which incident light (L) is transmitted. The transparent substrate 31 is made of transparent PVC or the like as in a normal optical disk. The first recording layer 33 has an information recording surface 34 on which information is recorded, and information recorded on the information recording surface 34
Reproduced by one wavelength of light. The first wavelength is about 650 nm
The first recording layer 33 corresponds to the information recording layer of a general digital multi-function disc. A spiral land is formed on the information recording surface 34 of the first recording layer 33 so as to form a track.
34a and pits 34b are formed. Here, the first
The track pitch of the recording layer 33 is about 0.74 μm, and the light incident surface 31a of the transparent substrate 31 and the information recording surface of the first recording layer 33.
It is desirable that the interval T1 between them is approximately 0.6 mm.
【００１３】前記半透膜35は前記第1記録層33の情報記
録面34上に形成され、入射光を波長領域に応じて光の透
過率を異にして第1波長の光の大部は反射させ、前記第2
記録層45に記録された情報信号を再生するに用いられる
第2波長、例えば波長が780ｎｍの光は大部透過させる。
前記スペーサ39は前記第1記録層33と第2記録層45との間
隔を保つと共に２枚の記録層33、45を接合するための層
に前記半透膜35を透過して入射された第2波長の光を透
過させる。The semi-transparent film 35 is formed on the information recording surface 34 of the first recording layer 33, and most of the light of the first wavelength is formed by changing the transmittance of the incident light according to the wavelength region. Reflect the second
The second wavelength used for reproducing the information signal recorded on the recording layer 45, for example, light having a wavelength of 780 nm is largely transmitted.
The spacer 39 keeps an interval between the first recording layer 33 and the second recording layer 45 and transmits the semi-permeable film 35 to a layer for joining the two recording layers 33 and 45, and is incident on the layer. Transmits two wavelengths of light.
【００１４】ここで、前記半透膜35と前記スペーサ39と
の間及び前記スペーサ39と前記第2記録層45との間の各
々には接合層37・41が形成される。この接合層37・41は
紫外線を照射することにより硬化される硬化樹脂よりな
り、公知のスピンコーティング法等により接合される。
前記第2記録層45は情報信号の記録される情報記録面46
を有し、記録された情報が前記半透膜35を透過した第2
波長の光により再生される。前記第2記録層45は、通常
のコンパクトディスク(CD）の情報記録層に該当する。
第2記録層45は、第1記録層33のようにトラックを成すよ
うに螺旋状のランド46aと、ピット46bとが形成されてい
る。ここで、前記第2記録層45のトラックピッチは約1.6
μmであり、前記透明基板31の光入射面31aと前記第2記
録層45の情報記録面46との間の間隔Ｔ2は約1.2ｍｍであ
ることが望ましい。Here, bonding layers 37 and 41 are formed between the semi-permeable film 35 and the spacer 39 and between the spacer 39 and the second recording layer 45, respectively. The bonding layers 37 and 41 are made of a cured resin that is cured by irradiating ultraviolet rays, and are bonded by a known spin coating method or the like.
The second recording layer 45 has an information recording surface 46 on which an information signal is recorded.
Having the recorded information transmitted through the semi-permeable membrane 35
It is reproduced by light of the wavelength. The second recording layer 45 corresponds to an information recording layer of a normal compact disc (CD).
Like the first recording layer 33, the second recording layer 45 has a spiral land 46a and a pit 46b so as to form a track. Here, the track pitch of the second recording layer 45 is about 1.6
a [mu] m, it is desired spacing T 2 of the between the light incident surface 31a and the information recording surface 46 of the second recording layer 45 of the transparent substrate 31 is about 1.2 mm.
【００１５】前記第1記録層33及び第2記録層45に記録さ
れた情報において、実質的に同じ情報が収録されうる。
例えば、本発明の光ディスクをオーディオ用互換ディス
クとして使用する場合、第1記録層33及び第2記録層45の
各々に同じ種類のオーディオ情報を他の形で記録する。
即ち、第1記録層33には96KHz以上のサンプリング周波数
とドルビAC3の5.1チャンネルを有するスーパーオーディ
オ情報を記録し、前記第2記録層45には44.1KHzサンプリ
ング周波数のステレオ音響情報を記録しうる。従って、
CDPではステレオで動作し、DVDPではスーパーオーディ
オで動作する。In the information recorded on the first recording layer 33 and the second recording layer 45, substantially the same information can be recorded.
For example, when the optical disk of the present invention is used as an audio compatible disk, the same type of audio information is recorded on each of the first recording layer 33 and the second recording layer 45 in another form.
That is, super audio information having a sampling frequency of 96 KHz or more and 5.1 channels of Dolby AC3 is recorded on the first recording layer 33, and stereo audio information having a sampling frequency of 44.1KHz can be recorded on the second recording layer 45. Therefore,
It works in stereo in CDP and super audio in DVDP.
【００１６】前記反射膜43は前記接着層41と前記第2記
録層45の情報記録面(46)との間に形成され、前記第2記
録層45に集束された光を反射させる。前記反射膜43はア
ルミニウム、アルミニウム合金、銅、銅合金等で形成さ
れる。前記保護層47は前記第2記録層45を保護するため
の層であって、前記第2記録層45上に形成されて前記第2
記録層45の酸化及び損傷を防止する。本発明は前記半透
膜35の構造及び特性に特徴があるものであって、前記半
透膜35を図3から図6までに基づき説明する。The reflection film 43 is formed between the adhesive layer 41 and the information recording surface (46) of the second recording layer 45, and reflects the light focused on the second recording layer 45. The reflection film 43 is formed of aluminum, aluminum alloy, copper, copper alloy or the like. The protective layer 47 is a layer for protecting the second recording layer 45, and is formed on the second recording layer 45 to form the second recording layer 45.
Oxidation and damage of the recording layer 45 are prevented. The present invention is characterized by the structure and characteristics of the semipermeable membrane 35, and the semipermeable membrane 35 will be described with reference to FIGS.
【００１７】前記半透膜35は図3に示されたように、650
ｎｍの波長に対して大部反射させ、すなわち、例えば約
25％以上の反射率を有し、780ｎｍの波長に対して大分
訪うかする、すなわち、例えば18％以下の反射率を有す
ることが望ましい。これは、一つの光源を使用するCD/D
VD互換プレーヤーを用いて光ディスクを再生するにあた
って短波長、例えば650ｎｍの波長を用いてCDを再生す
ることにより本発明の光ディスクの第2記録層45に記録
された情報を再生しにくい状況の発生を防止するためで
ある。The semi-permeable membrane 35 has a thickness of 650, as shown in FIG.
for a wavelength of nm, ie, for example, about
It is desirable to have a reflectivity of 25% or more and to visit the wavelength of 780 nm, ie, to have a reflectivity of, for example, 18% or less. This is a CD / D using one light source
When playing back an optical disc using a VD compatible player, by playing back a CD using a short wavelength, for example, a wavelength of 650 nm, it may be difficult to reproduce information recorded on the second recording layer 45 of the optical disc of the present invention. This is to prevent it.
【００１８】前記のような半透膜特性を得るために前記
半透膜は後述のような誘電体物質よりなる。即ち、前記
半透膜35はSi、SiNx、BeCu、TiO2、SiO2等の誘電体物質
で構成されうる。ここで、前記半透膜35の厚さを調節す
ることにより、第1波長に対する反射率と、第2波長に対
する透過率とを決定しうる。In order to obtain the above semi-permeable membrane characteristics, the semi-permeable membrane is made of a dielectric material as described later. That is, the semi-permeable film 35 may be made of a dielectric material such as Si, SiN x , BeCu, TiO 2 , and SiO 2 . Here, by adjusting the thickness of the semi-permeable film 35, the reflectance for the first wavelength and the transmittance for the second wavelength can be determined.
【００１９】また、前記半透膜35は、TiO2層、MgF2層、
TiO2層が順次に積層された多層の誘電体物質で構成され
うる。また、前記半透膜35は2.0から2.9までの範囲の屈
折率を有する高屈折率誘電体層と、1.3から2.0までの範
囲の屈折率を有する低屈折率誘電体層とを含んで構成さ
れることが望ましい。The semi-permeable membrane 35 includes a TiO 2 layer, a MgF 2 layer,
It may be composed of a multilayer dielectric material in which TiO 2 layers are sequentially stacked. Further, the semi-permeable membrane 35 is configured to include a high-refractive-index dielectric layer having a refractive index in the range of 2.0 to 2.9 and a low-refractive-index dielectric layer having a refractive index in the range of 1.3 to 2.0. Is desirable.
【００２０】このように、光の入射側から、高屈折率誘
電体層と低屈折率誘電体層とを積層した場合、境界面で
の反射率Rは、下記の数学式１により決定される。As described above, when the high-refractive-index dielectric layer and the low-refractive-index dielectric layer are stacked from the light incident side, the reflectance R at the interface is determined by the following mathematical formula 1. .
【００２１】[0021]
【数１】 (Equation 1)
【００２２】ここで、ｎ1とｎ2とは、それぞれ、高屈折
率誘電体層と低屈折率誘電体層との屈折率であり、d
は、高屈折率誘電体層の厚さであり、λは入射光の波長
である。従って、図4に示されたように、前記高屈折率
誘電体層と前記低屈折率誘電体層とは交互に積層して半
透膜35の波長による反射率を決定しうる。ここで、前記
高屈折率誘電体層と低屈折率誘電体層の各々はSi、Si
Nx、BeCu、TiO2、SiO2等の誘電体物質で構成しうる。Here, n 1 and n 2 are the refractive indices of the high refractive index dielectric layer and the low refractive index dielectric layer, respectively, and d 1
Is the thickness of the high refractive index dielectric layer, and λ is the wavelength of the incident light. Accordingly, as shown in FIG. 4, the high-refractive-index dielectric layers and the low-refractive-index dielectric layers may be alternately stacked to determine the reflectance according to the wavelength of the semi-permeable film 35. Here, each of the high refractive index dielectric layer and the low refractive index dielectric layer is Si, Si
It can be composed of a dielectric material such as N x , BeCu, TiO 2 , SiO 2 .
【００２３】また、前記半透膜35は、図5に示されたよ
うに、前記第1記録層33側から順次に積層された高屈折
率誘電体層35aと、低屈折率誘電体層35bと、高屈折率誘
電体層35cとを含んで構成しうる。示されたように、各
誘電体層がSiNで構成され、高屈折率層35a、35cは屈折
率2.88であり、低屈折率層35bは屈折率1.94で構成した
場合の第1波長650ｎｍの光及び第2波長780ｎｍの光に対
する反射率特性を図6に示した。As shown in FIG. 5, the semi-permeable film 35 includes a high-refractive-index dielectric layer 35a and a low-refractive-index dielectric layer 35b which are sequentially stacked from the first recording layer 33 side. And a high refractive index dielectric layer 35c. As shown, each dielectric layer is composed of SiN, the high refractive index layers 35a and 35c have a refractive index of 2.88, and the low refractive index layer 35b has a first wavelength of 650 nm when configured with a refractive index of 1.94. FIG. 6 shows the reflectance characteristics for light having a second wavelength of 780 nm.
【００２４】図6は2番目の層35bの厚さが900オングスト
ロームであり、３番目の層35cの厚さが600オングストロ
ームである場合、最初の層35aの厚さに応じる第1波長及
び第2波長における反射率の変化を示したグラフであ
る。図示されたように、最初の層35aの厚さが約1500オ
ングストロームの当りで第1波長650ｎｍに対する反射率
は57％と高く、第2波長780ｎｍに対する反射率は16％と
低く、すなわち、第2波長に対して84％の光量を透過さ
せる波長選択性を示すことがわかる。このように、前述
した誘電体層の厚さを調節したり、屈折率を調節するこ
とにより第1及び第2波長に対して選択的に光の反射率を
調節しうる。FIG. 6 shows that if the thickness of the second layer 35b is 900 Å and the thickness of the third layer 35c is 600 Å, the first wavelength and the second wavelength corresponding to the thickness of the first layer 35a. 5 is a graph showing a change in reflectance with wavelength. As shown, the reflectivity for the first wavelength 650 nm is as high as 57% and the reflectivity for the second wavelength 780 nm is as low as 16% when the thickness of the first layer 35a is about 1500 Å, ie, the second It can be seen that the film exhibits wavelength selectivity for transmitting a light amount of 84% with respect to the wavelength. As described above, the reflectivity of light can be selectively controlled with respect to the first and second wavelengths by adjusting the thickness of the dielectric layer or the refractive index.
【００２５】以下、CDPによる情報再生時及びDVDPによ
る情報再生時を例として光ディスクとしての使用を例に
して説明する。図7のように、本発明の光ディスクをDVD
Pに装着した場合、光源から照射された650ｎｍ波長の光
51は、開口数0.6の対物レンズ53により集束されて前記
第1記録層33に焦点が集束される。一方、図8のように、
本発明の光ディスクをCDPに装着した場合、光源から照
射された780ｎｍの波長の光61は、開口数0.45の対物レ
ンズ63により集束される。この集束された光62は前記透
明基板31、第1記録層33、半透膜35及びスペーサ39を透
過して前記第2記録層45に集束される。A description will be given below of an example in which information is reproduced by CDP and information is reproduced by DVDP, using the optical disk as an example. As shown in FIG. 7, the optical disc of the present invention is
650nm wavelength light emitted from the light source when attached to P
51 is focused by an objective lens 53 having a numerical aperture of 0.6, and the focus is focused on the first recording layer 33. On the other hand, as shown in FIG.
When the optical disk of the present invention is mounted on a CDP, light 61 having a wavelength of 780 nm emitted from a light source is focused by an objective lens 63 having a numerical aperture of 0.45. The focused light 62 passes through the transparent substrate 31, the first recording layer 33, the semi-permeable film 35, and the spacer 39, and is focused on the second recording layer 45.
【００２６】[0026]
【発明の効果】従って、本発明による光ディスクは第1
及び第2記録層に情報を記録し、２枚の記録層の間に波
長に応じて選択的に透過率を変える半透膜を形成するこ
とにより、他のフォーマットを有する別種のディスクプ
レーヤー、例えばCDP及びDVDPに互換採用しうる。Therefore, the optical disc according to the present invention is the first
And recording information on the second recording layer and forming a semi-permeable membrane between the two recording layers to selectively change the transmittance according to the wavelength, to thereby provide another type of disc player having another format, for example, Compatible with CDP and DVDP.
【図１】 従来例による二層構造を有する光ディスクを
示す断面図である。FIG. 1 is a cross-sectional view showing an optical disc having a two-layer structure according to a conventional example.
【図２】 本発明の一実施の形態として示した光ディス
クを示す断面図である。FIG. 2 is a cross-sectional view showing the optical disc shown as an embodiment of the present invention.
【図３】 本発明による光ディスクの半透膜の波長によ
る反射率の特性を示すグラフである。FIG. 3 is a graph showing a characteristic of a reflectance according to a wavelength of a semipermeable film of an optical disc according to the present invention.
【図４】 本発明による光ディスクの半透膜の一実施の
形態として示す断面図である。FIG. 4 is a cross-sectional view showing one embodiment of a semipermeable membrane of an optical disc according to the present invention.
【図５】 本発明による光ディスクの半透膜の他の実施
の形態を示す断面図である。FIG. 5 is a sectional view showing another embodiment of the semipermeable membrane of the optical disc according to the present invention.
【図６】 図5の第1層誘電体層の厚さ変化による第1及び
第2波長のそれぞれの反射率を示すグラフである。FIG. 6 is a graph showing respective reflectances of first and second wavelengths according to a change in thickness of a first dielectric layer of FIG. 5;
【図７】 本発明による光ディスクの第1記録層を用いる
例を示す概略図である。FIG. 7 is a schematic diagram showing an example of using the first recording layer of the optical disc according to the present invention.
【図８】 本発明による光ディスクの第2記録層を用いる
例を示す概略図である。FIG. 8 is a schematic diagram showing an example of using the second recording layer of the optical disc according to the present invention.
３１ 透明基板 ３３ 第1記録層 ３５ 半透膜 ３９ スペーサ ４３ 反射膜 ４５ 第2記録層 ４７ 保護層 31 Transparent substrate 33 First recording layer 35 Semi-permeable film 39 Spacer 43 Reflecting film 45 Second recording layer 47 Protective layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 盧 明道 大韓民国京畿道軍浦市山本洞1120番地主夢 アパート1007棟705號 (72)発明者 尹 斗燮 大韓民国京畿道水原市八達區仁溪洞384番 地住公アパート109棟403號 (72)発明者 鄭 丞台 大韓民国京畿道城南市盆唐區書▲ヒュン▼ 洞291番地東亞アパート207棟1415號 (72)発明者 劉 長勳 大韓民国ソウル特別市永登浦區大林３洞 777−１番地新東亞アパート２棟1002號 (72)発明者 李 哲雨 大韓民国ソウル特別市龍山區東部二村洞 301−162番地現代アパート32棟902號 (72)発明者 徐 偕貞 大韓民国京畿道城南市中院區上大院３洞 1582番地 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Rom Myung-do 1120, Yamamoto-dong, Gunpo-si, Gunpo-si, Gyeonggi-do, Republic of Korea Apartment No. 1007 Building 705 No. 72 (72) Inventor Yoon Doosup Insa-dong, Badal-gu, Suwon-si, Gyeonggi-do, Republic of Korea No. 384 Jijugong Apartment 109 Building No. 403 (72) Inventor Cheng Jongdae Bundang-gu, Seongnam-si, Gyeonggi-do, South Korea ▲ Hyun ▼ 291 Dong-A Apartment 207 Building No. 207 1415 No. 291 (72) Inventor Liu Chang-Hun Special Seoul, Korea No. 777-1, Daebayung 3-dong, Yeongdeungpo-gu, Seoul No. 777-1 New Donga Apartment 2 Building 1002 No. 1002 (72) Inventor Lee Cheolyu 301-162 Dongchon-dong Nichon-dong, Yongsan-gu, Seoul, Republic of Korea No. 32 Modern Building 32 Building No. 902 No. 902 (72) Invention 1582 Sangdae-dong 3 Jongnam-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
Claims (9)
報が第1波長の光により再生される第1記録層と、 入射光を、波長領域に応じて光の透過率を異にして前記
第1波長の光は大部反射させ、第2波長の光は大部透過さ
せる半透膜と、 前記半透膜を透過した光が透過され、間隔を保つスペー
サと、 情報信号の記録される情報記録面を有し、記録された情
報が前記半透膜を透過した第2波長の光により再生され
る第2記録層と、 前記スペーサと第2記録層との間に形成され、前記第2記
録層の情報記録面に集束された光を反射させる反射膜を
含んで相異なるフォーマットを有する光ディスクプレー
ヤーに互換採用しうることを特徴とする光ディスク。1. A first recording layer having a transparent substrate through which incident light is transmitted, an information recording surface on which an information signal is recorded, and from which recorded information is reproduced by light of a first wavelength. A semi-transmissive film that largely reflects the first wavelength light and largely transmits the second wavelength light with different light transmittances depending on the wavelength region, and light that has passed through the semi-permeable film. A second recording layer having an information recording surface on which an information signal is recorded, wherein the recorded information is reproduced by light of a second wavelength transmitted through the semi-permeable membrane, Compatible with optical disc players having different formats including a reflective film formed between the spacer and the second recording layer and reflecting light focused on the information recording surface of the second recording layer. An optical disc characterized by the following.
物、BeCu、二酸化チタン、二酸化硅素及びこれらの組合
せよりなるグループから選択された何れか一つを含んで
なることを特徴とする請求項１に記載の光ディスク。2. The semiconductor device as claimed in claim 1, wherein the semi-permeable membrane comprises one selected from the group consisting of silicon, silicon nitride, BeCu, titanium dioxide, silicon dioxide, and a combination thereof. An optical disk according to claim 1.
タン層と、フッ化マグネシウム層と、二酸化チタン層と
を含むことを特徴とする請求項１に記載の光ディスク。3. The optical disc according to claim 1, wherein the semi-permeable film includes a titanium dioxide layer, a magnesium fluoride layer, and a titanium dioxide layer which are sequentially stacked.
を有する誘電体層と、1.3乃至2.0範囲の低屈折率を有す
る誘電体層とを含んでなることを特徴とする請求項１に
記載の光ディスク。4. The semiconductor device according to claim 1, wherein said semi-permeable membrane includes a dielectric layer having a high refractive index in a range of 2.0 to 2.9 and a dielectric layer having a low refractive index in a range of 1.3 to 2.0. 2. The optical disc according to 1.
電体層との各々はシリコン、シリコン窒化物、BeCu、二
酸化チタン、二酸化硅素よりなるグループから選択され
た何れか一つを含んでなることを特徴とする請求項４に
記載の光ディスク。5. The high-refractive-index dielectric layer and the low-refractive-index dielectric layer each include at least one selected from the group consisting of silicon, silicon nitride, BeCu, titanium dioxide, and silicon dioxide. The optical disk according to claim 4, wherein the optical disk comprises:
に積層された高屈折率誘電体層と、低屈折率誘電体層
と、高屈折率誘電体層とを含んでなることを特徴とする
請求項４に記載の光ディスク。6. The semi-permeable film includes a high-refractive-index dielectric layer, a low-refractive-index dielectric layer, and a high-refractive-index dielectric layer that are sequentially stacked from the first recording layer side. The optical disk according to claim 4, wherein:
ム合金、銅、銅合金よりなるグループから選択された何
れか一つを含んでなることを特徴とする請求項１に記載
の光ディスク。7. The optical disk according to claim 1, wherein the reflection film includes one selected from the group consisting of aluminum, an aluminum alloy, copper, and a copper alloy.
0.74μmであり、前記透明層と前記第1記録層の情報記録
面との間の厚さは約0.6ｍｍであることを特徴とする請
求項１に記載の光ディスク。8. The first recording layer has a track pitch of about
The optical disc according to claim 1, wherein the optical disc has a thickness of 0.74 µm and a thickness between the transparent layer and the information recording surface of the first recording layer is about 0.6 mm.
1.6μmであり、前記透明層と前記第2記録層の情報記録
面との間の厚さは約1.2ｍｍであることを特徴とする請
求項１に記載の光ディスク。9. The second recording layer having a track pitch of about
The optical disc according to claim 1, wherein the optical disc has a thickness of 1.6 µm, and a thickness between the transparent layer and the information recording surface of the second recording layer is about 1.2 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR199734111 | 1997-07-21 | ||
| KR1019970034111A KR19990011140A (en) | 1997-07-21 | 1997-07-21 | Optical disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1139710A true JPH1139710A (en) | 1999-02-12 |
Family
ID=19515218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10130781A Pending JPH1139710A (en) | 1997-07-21 | 1998-05-13 | Optical disk |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH1139710A (en) |
| KR (1) | KR19990011140A (en) |
| CN (1) | CN1146889C (en) |
| GB (1) | GB2327525A (en) |
| NL (1) | NL1009126A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006132283A1 (en) * | 2005-06-09 | 2009-01-08 | パイオニア株式会社 | Information recording medium |
| US7623423B2 (en) | 2005-06-22 | 2009-11-24 | Sony Corporation | Apparatus and method for recording data in different formats on a multilayer optical disk, and storage medium having a program stored thereon to enable a computer to perform such method |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020101816A1 (en) * | 1999-05-20 | 2002-08-01 | Michael F. Braitberg | Removable optical storage device and system |
| CN100487796C (en) * | 1999-06-22 | 2009-05-13 | 松下电器产业株式会社 | Optical disc drive and method for reading the optical disk |
| US6990055B1 (en) | 1999-06-22 | 2006-01-24 | Matsushita Electric Industrial Co., Ltd. | Optical disc drive for controlling reproduction of an optical disc having a plurality of data layers |
| KR20010047949A (en) * | 1999-11-24 | 2001-06-15 | 윤종용 | Phase change optical disk |
| JP2002056574A (en) * | 2000-08-04 | 2002-02-22 | Pioneer Electronic Corp | Optical recording medium |
| KR20020074685A (en) * | 2001-03-21 | 2002-10-04 | 한국전자통신연구원 | Optical storage medium based on the luminescence from the crystalline semiconductor and optical storage/reading device and method by using photon absorption |
| JP2002352469A (en) * | 2001-05-25 | 2002-12-06 | Pioneer Electronic Corp | Multilayer information recording medium and information recording/reproducing device |
| KR20050079018A (en) * | 2004-02-03 | 2005-08-09 | 엘지전자 주식회사 | Optical disk structure |
| KR20060016471A (en) * | 2004-08-18 | 2006-02-22 | 엘지전자 주식회사 | Multi reproducing media |
| US20060179448A1 (en) * | 2004-12-23 | 2006-08-10 | Smith Wayne M | Multilayer dual optical disk |
| JP4305776B2 (en) * | 2006-10-11 | 2009-07-29 | ソニー株式会社 | Optical disc apparatus and focus position control method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7803069A (en) * | 1978-03-22 | 1979-09-25 | Philips Nv | MULTI-LAYER INFORMATION DISK. |
| JPH0823941B2 (en) * | 1988-11-08 | 1996-03-06 | パイオニア株式会社 | Optical information recording carrier and manufacturing method thereof |
| JPH056571A (en) * | 1991-06-28 | 1993-01-14 | Pioneer Electron Corp | Optical type information storage medium |
| JP3008819B2 (en) * | 1995-05-31 | 2000-02-14 | 日本ビクター株式会社 | optical disk |
| US5965228A (en) * | 1995-09-01 | 1999-10-12 | Balzers Aktiengesellschaft | Information carrier, method for producing same |
| WO1997009716A1 (en) * | 1995-09-08 | 1997-03-13 | Philips Electronics N.V. | Optical multilayer information carrier |
| JPH11500253A (en) * | 1995-10-13 | 1999-01-06 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Optical recording medium having double information layer |
| FR2750528A1 (en) * | 1996-06-28 | 1998-01-02 | Thomson Multimedia Sa | OPTICAL DISC COMPATIBLE WITH TWO DIFFERENT READING SYSTEMS |
-
1997
- 1997-07-21 KR KR1019970034111A patent/KR19990011140A/en not_active Application Discontinuation
-
1998
- 1998-04-21 CN CNB981069576A patent/CN1146889C/en not_active Expired - Fee Related
- 1998-05-07 GB GB9809623A patent/GB2327525A/en not_active Withdrawn
- 1998-05-11 NL NL1009126A patent/NL1009126A1/en active Search and Examination
- 1998-05-13 JP JP10130781A patent/JPH1139710A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006132283A1 (en) * | 2005-06-09 | 2009-01-08 | パイオニア株式会社 | Information recording medium |
| JP4502402B2 (en) * | 2005-06-09 | 2010-07-14 | パイオニア株式会社 | Information recording medium |
| US7623423B2 (en) | 2005-06-22 | 2009-11-24 | Sony Corporation | Apparatus and method for recording data in different formats on a multilayer optical disk, and storage medium having a program stored thereon to enable a computer to perform such method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9809623D0 (en) | 1998-07-01 |
| KR19990011140A (en) | 1999-02-18 |
| CN1206183A (en) | 1999-01-27 |
| NL1009126A1 (en) | 1999-01-25 |
| CN1146889C (en) | 2004-04-21 |
| GB2327525A (en) | 1999-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5485452A (en) | Optical information recording medium | |
| KR100432339B1 (en) | Multilayer optical disk | |
| EP0520619A1 (en) | Optical information recording medium | |
| JP4192373B2 (en) | optical disk | |
| JP2004213720A (en) | Optical recording medium | |
| JPH11296890A (en) | Compatible optical pickup device | |
| KR100467412B1 (en) | Optical disc and manufacturing method thereof | |
| JPH1139710A (en) | Optical disk | |
| KR20040094897A (en) | Dual stack optical data storage medium | |
| JPH09237438A (en) | Optical recording medium | |
| TWI336074B (en) | Dual-stack optical data storage medium and use of such medium | |
| JP4342439B2 (en) | Double stacked optical data storage media and use of such media | |
| KR20060105233A (en) | Hybrid disc and recording and/or reproducing apparatus and method for the same | |
| KR20060051131A (en) | Optical disc and optical disc device | |
| JP2004145003A (en) | Anti-reflection film coating method and optical lens applied with this anti-reflection film | |
| KR0141181B1 (en) | Multilayer optical recording medium and its manufacturing method | |
| JP4209416B2 (en) | Optical information recording medium and optical information recording medium reproducing apparatus | |
| JPH10172182A (en) | Mutilayered structure optical information medium | |
| KR100275686B1 (en) | Optical disk and method for manufactuirng thereof | |
| JP2001134981A (en) | Multilayered optical disk | |
| JP2002092956A (en) | Optical information recording medium and producing method thereof | |
| JPWO2002075732A1 (en) | optical disk | |
| JPH0991752A (en) | Multilayer optical disk | |
| JP2003059107A (en) | Optical disk having multilayered recording layer, method of manufacturing optical disk, optical disk and method of recording and reproducing optical disk | |
| JPH1116208A (en) | Multilayer information recording medium |