JPS6047247A - Recording medium - Google Patents
Recording mediumInfo
- Publication number
- JPS6047247A JPS6047247A JP58154852A JP15485283A JPS6047247A JP S6047247 A JPS6047247 A JP S6047247A JP 58154852 A JP58154852 A JP 58154852A JP 15485283 A JP15485283 A JP 15485283A JP S6047247 A JPS6047247 A JP S6047247A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- base plate
- film
- wavelength
- recording film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
-
- 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
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、記録媒体に係シ、特に高速回転に好適な金属
性のディスク状基板を用いた場合の光ディスクの構造に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a recording medium, and particularly to the structure of an optical disc using a metallic disc-shaped substrate suitable for high-speed rotation.
光ディスクにおいてはガラス又はプラスチック等の基板
にＴｅ系合金等の記録膜を設け、レーザ光によってその
記録膜に孔をあけて信号を記録再生する方法が知られて
いる。光ディスクをコンピュータの外部メモリとして用
いる場合には、データの転送速度を上げる必要がある。For optical discs, a method is known in which a recording film made of a Te-based alloy or the like is provided on a substrate such as glass or plastic, and a hole is made in the recording film using a laser beam to record and reproduce signals. When using an optical disk as an external memory for a computer, it is necessary to increase the data transfer speed.
そのためには、ディスクの回転数を太きくしなければな
らない。To do this, the number of revolutions of the disc must be increased.
ディスクの回転数が大きくなると、遠心力のためガラス
やプラスチック基板では破損の恐れがあるため、金属性
の基板を使用する必要がある。When the rotational speed of the disk increases, glass or plastic substrates may be damaged due to centrifugal force, so it is necessary to use a metal substrate.
第１図は、ガラス基板１を用いた時のディスクの構造の
例を示す部分断面図である。ガラス基板１上に設けた樹
脂材料等の下地膜２によって信号を記録するための案内
溝（プリグループと称す）３が作られる。この樹脂材料
２の上にＴｅ系合金等の記録膜４を設け、この膜４にレ
ーザ光５を照射することによって孔６があく。記録膜４
は反射率が約４０チ（記録膜側から光が入射する時は約
５５チ）であシ、孔６があくと、その部分は樹脂材料２
及びガラス基板１の反射率となるので、数多に落ちる。FIG. 1 is a partial cross-sectional view showing an example of the structure of a disk when a glass substrate 1 is used. A guide groove (referred to as a pre-group) 3 for recording signals is formed by a base film 2 made of a resin material or the like provided on a glass substrate 1. A recording film 4 made of a Te-based alloy or the like is provided on this resin material 2, and holes 6 are formed by irradiating this film 4 with a laser beam 5. Recording film 4
has a reflectance of about 40 inches (approximately 55 inches when light enters from the recording film side), and when the hole 6 is made, that part is covered with resin material 2.
and the reflectance of the glass substrate 1, so it falls into many numbers.
従って、孔６の有無はレーザ光５をディスク上に当てて
、その反射光の強弱を検知することによって判定できる
。Therefore, the presence or absence of the hole 6 can be determined by shining the laser beam 5 onto the disk and detecting the intensity of the reflected light.
ディスクを高速回転する時には、ガラス基板１０部分を
金属性の円板、例えばアルミニウム合金におきかえる必
要がある。しかし、アルミニウム合金の場合、反射率が
ガラスやプラスチックと比べると高く、記録膜４とほぼ
同じになるため、孔６の有無が検知しにくく、なる欠点
がある。When the disk is rotated at high speed, it is necessary to replace the glass substrate 10 with a metallic disk, such as an aluminum alloy. However, in the case of aluminum alloy, the reflectance is higher than that of glass or plastic, and is almost the same as that of the recording film 4, so it has the disadvantage that it is difficult to detect the presence or absence of the holes 6.
本発明の目的は、このような高い反射率のディスク基板
の反射率を抑え、孔の有無が明確になるようなディスク
を提供することにある。An object of the present invention is to provide a disk in which the reflectance of such a high reflectance disk substrate can be suppressed and the presence or absence of holes can be clearly seen.
本発明は、金属性のディスク基板と記録膜の間に反射率
の低い下地膜を設け、記録膜上の孔の有無がガラスやプ
ラスチック基板の時と同じように明確になるようにする
ものである。The present invention provides a base film with low reflectance between a metal disk substrate and a recording film, so that the presence or absence of holes on the recording film can be clearly seen in the same way as with glass or plastic substrates. be.
以下、本発明を実施例に従って説明する。なお、実施例
は金属としてアルミニウム合金を用いたディスクについ
て説明するが、他の金属についても本発明の本質を損う
ことなく適用できるものである。Hereinafter, the present invention will be explained according to examples. In the embodiment, a disk using an aluminum alloy as the metal will be described, but the present invention can be applied to other metals without impairing the essence of the present invention.
第２図は、本発明の一実施例を示す断面図である。アル
ミ合金の基板８の上に磁気ディスクの塗膜９を塗布し、
更にその上に光デイスク用の記録膜４を蒸着したもので
ある。磁気ディスクの塗膜９は反射率が数多と低い。ま
た、面粗さが小さくできるので、光デイスク用の記録膜
４の膜厚も均一に出来る。記録膜４上ではレーザ光５で
案内溝を記録し、更に信号を記録するもので、案内溝は
あらかじめ設けていない。FIG. 2 is a sectional view showing an embodiment of the present invention. Applying a magnetic disk coating 9 on an aluminum alloy substrate 8,
Furthermore, a recording film 4 for an optical disk is deposited thereon. The coating film 9 of the magnetic disk has a very low reflectance. Furthermore, since the surface roughness can be reduced, the thickness of the recording film 4 for optical discs can also be made uniform. Guide grooves are recorded on the recording film 4 by the laser beam 5, and signals are further recorded, and the guide grooves are not provided in advance.
第３図の別の一実施例を示す断面図である。アルば合金
の基板８の」二に、反射率２０％以下で再生光が樹脂層
を透過し、基板表面で反射して再び樹脂層を透過して戻
る時の光吸収が５０係以上の層１１、たとえば信号再生
して用いるレーザ光の波長（６０００〜９０００Ａ）の
うちの少なくとも１波長を吸収する染料、顔料、あるい
はこれらをポリマー中に分散させたもの同じ波長範囲の
うちの少なくとも一波長を吸収する。たとえばカーボ／
の蒸着膜、Ｂｉ、’Ｉ’ｅなどの金属、半金属、半導体
の低酸化物の蒸着膜を設け、この層１１自身、あるいは
この層の上または下に設けた有機物層に案内溝３が設け
られている。この層１１、おるいはその上の有機物層の
上に記録膜４が設けられ、レーザ光５によって信号６が
記録される。FIG. 4 is a sectional view showing another embodiment of FIG. 3; The second layer of the aluminum alloy substrate 8 is a layer with a reflectance of 20% or less, when the reproduced light passes through the resin layer, is reflected on the substrate surface, and returns through the resin layer again, the light absorption is 50 or more. 11. For example, dyes or pigments that absorb at least one wavelength (6000 to 9000 A) of the laser light used for signal reproduction, or those dispersed in a polymer that absorb at least one wavelength within the same wavelength range. Absorb. For example, carb/
A vapor-deposited film of , a vapor-deposited film of a low oxide of metal, semi-metal, or semiconductor such as Bi or 'I'e is provided, and guide grooves 3 are formed in this layer 11 itself or in an organic layer provided above or below this layer. It is provided. A recording film 4 is provided on this layer 11 or an organic layer thereon, and a signal 6 is recorded by a laser beam 5.
第４図は更に別の一実施例を示す断面図である。FIG. 4 is a sectional view showing yet another embodiment.
これは、第２図又は第３図のディスク膜構造の記録膜４
の上に、記録膜４を傷、ゴミ等から保護するための保護
膜１０を設けたものである。This is the recording film 4 of the disk film structure shown in FIG. 2 or 3.
A protective film 10 is provided thereon to protect the recording film 4 from scratches, dust, etc.
以上述べたように本発明によれば、反射率の高い金属性
のディスク基板に対しても、ガラスやプラスチックの基
板と同様に信号の記録再生が出来るディスクを提供でき
る。As described above, according to the present invention, it is possible to provide a disk that can record and reproduce signals even on a highly reflective metallic disk substrate in the same way as on a glass or plastic substrate.
なお、本発明の実施例ではディスクの片側（記録膜を設
けているが、両側にある場合にもシ明を適用できること
は明らかである。In the embodiments of the present invention, the recording film is provided on one side of the disk, but it is clear that the recording film can be applied to cases where the recording film is provided on both sides.
第１図は従来の元ディスク構造の一例を示す部分断面図
、第２図〜第４図は本発明の実施例を示すディスク断面
図である。
ｌ・・・ディスク基板、２・・・下地膜、３・・・案内
溝、４・・・記録膜、５・・・し〜ザ光、６・・・信号
孔、７・・・絞込みレンズ、８・・・金属基板、９・・
・磁気ディスク塗膜、１０・・・保護膜、１１・・・元
高吸収率層。
第 １ 図
番２ 目
第３ 図
第４−２FIG. 1 is a partial sectional view showing an example of a conventional original disk structure, and FIGS. 2 to 4 are disk sectional views showing embodiments of the present invention. l...Disk substrate, 2...Underlying film, 3...Guide groove, 4...Recording film, 5...Then the light, 6...Signal hole, 7...Fitting lens , 8...metal substrate, 9...
-Magnetic disk coating film, 10...protective film, 11...original high absorption layer. 1st drawing number 2nd 3rd drawing 4-2
Claims (1)
を下地膜として設け、この上に記録膜を設けたことを特
徴とする記録媒体。A recording medium characterized in that a film having a reflectance of 20% or less is provided as a base film on the surface of a metallic substrate, and a recording film is provided on this base film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58154852A JPS6047247A (en) | 1983-08-26 | 1983-08-26 | Recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58154852A JPS6047247A (en) | 1983-08-26 | 1983-08-26 | Recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6047247A true JPS6047247A (en) | 1985-03-14 |
Family
ID=15593309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58154852A Pending JPS6047247A (en) | 1983-08-26 | 1983-08-26 | Recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6047247A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0420982A1 (en) * | 1988-06-21 | 1991-04-10 | Kyodo Printing Co., Ltd. | Optical card having a light-absorbing layer |
| EP0642124A1 (en) * | 1993-09-08 | 1995-03-08 | Sony Corporation | Optical information recording medium |
| US5445853A (en) * | 1992-01-09 | 1995-08-29 | Sony Corporation | Optical data storage media |
-
1983
- 1983-08-26 JP JP58154852A patent/JPS6047247A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0420982A1 (en) * | 1988-06-21 | 1991-04-10 | Kyodo Printing Co., Ltd. | Optical card having a light-absorbing layer |
| EP0420982B1 (en) * | 1988-06-21 | 1996-10-09 | Kyodo Printing Co., Ltd. | Optical card having a light-absorbing layer |
| US5445853A (en) * | 1992-01-09 | 1995-08-29 | Sony Corporation | Optical data storage media |
| EP0642124A1 (en) * | 1993-09-08 | 1995-03-08 | Sony Corporation | Optical information recording medium |
| US5556681A (en) * | 1993-09-08 | 1996-09-17 | Sony Corporation | Optical information recording medium |
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