JPS5963038A - Optical recording mediun - Google Patents
Optical recording mediunInfo
- Publication number
- JPS5963038A JPS5963038A JP57172008A JP17200882A JPS5963038A JP S5963038 A JPS5963038 A JP S5963038A JP 57172008 A JP57172008 A JP 57172008A JP 17200882 A JP17200882 A JP 17200882A JP S5963038 A JPS5963038 A JP S5963038A
- Authority
- JP
- Japan
- Prior art keywords
- optical recording
- recording medium
- vapor
- curve
- write
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- 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
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00453—Recording involving spectral or photochemical hole burning
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 発明の技術分野 本発明は光ティスフ月光記録媒体に関するものである。[Detailed description of the invention] Technical field of invention TECHNICAL FIELD The present invention relates to a photonic moonlight recording medium.
技術の背景
光ディスクは大容量の情報記録が可能なこと、非接触で
記録・再生ができることでゴミやホコリの影響に強いな
どの特徴をもつメモリである。Technical Background Optical disks are memory devices that can store large amounts of information, can be recorded and played back without contact, and are resistant to the effects of dirt and dust.
第１図はかかる光ディスクの構造図で、ＰｋｆＭＡやポ
リカーボ坏−トなどの透明なプラスチック基板１の上に
金属あるいは半金属の薄膜よりなる記録媒体２を形成し
、記録媒体部を内側に向はスペーサ６を用いて封止した
構造がとられている。FIG. 1 is a structural diagram of such an optical disk, in which a recording medium 2 made of a thin film of metal or semimetal is formed on a transparent plastic substrate 1 such as PkfMA or polycarbonate, and the recording medium portion is oriented inward. A structure is adopted in which the spacer 6 is used for sealing.
かかる光ディスクはレーザ光によシ情報の記録および再
生が行なわれるが、ここでレーザ光はレンズによって直
径が約１μｍの小さな光スポットに絞り込むことができ
、従って１ビツトの情報記録に要する面積が１μｍ２程
度の微小面績で済むことから大容量ｄ１録が可能となる
。Information is recorded and reproduced on such optical discs using laser light, but the laser light can be focused by a lens into a small light spot with a diameter of about 1 μm, so the area required to record 1 bit of information is 1 μm2. A large capacity d1 recording is possible because only a small amount of surface area is required.
またレーザ光を用いた記録と再生において、透明基板１
の厚さは１．２ｍｍであるため数１０μｍ程度のゴミや
ホコリが存在しても記録再生に殆んど影響を与えなくて
済むと云う特徴がある。In addition, in recording and reproducing using laser light, the transparent substrate 1
Since the thickness of the disk is 1.2 mm, it has the characteristic that even if dirt or dust of several tens of micrometers exists, it will hardly affect recording and reproduction.
本発明は、かかる光ディスクにおいてｔＨ報の記録が行
なわれる記録媒体の改良に関するものである。The present invention relates to an improvement of a recording medium on which tH information is recorded on such an optical disc.
従来技術と問題点
この種の光記録媒体としては、従来膜厚２００〜３００
Ａ程度の７ｇ薄膜が使用されており、これは感度、信号
品質の点で優れている。Prior Art and Problems Conventionally, this type of optical recording medium has a film thickness of 200 to 300 mm.
A 7g thin film of A grade is used, which is excellent in terms of sensitivity and signal quality.
しかし、Ｔｅ薄膜は、高湿度雰囲気中では醒化により膜
が劣化して曹込み特性が低１し記録媒体として利用でき
なくなるという欠点があった。However, the Te thin film has the drawback that in a high humidity atmosphere, the film deteriorates due to oxidation, resulting in poor soaking properties, making it unusable as a recording medium.
発明の目的
本発明は上述の欠点を解決するだめのもので、尚湿度雰
囲気中での膜の劣化をなくして１込み特性の低下を防止
することのできる光記録媒体を提供することを目的とし
ている。OBJECTS OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and an object of the present invention is to provide an optical recording medium that can eliminate film deterioration in a humid atmosphere and prevent deterioration of 1-inclusive characteristics. There is.
発明の構成
本発明では、上述の目的を達成するため、従来のＴ、に
加えて少量のｃｒを添加して光記録媒体を構成している
。Structure of the Invention In the present invention, in order to achieve the above-mentioned object, in addition to the conventional T, a small amount of Cr is added to form an optical recording medium.
発明の実施例
以下、第２図乃至第４図に関連して本発明の詳細な説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to FIGS. 2-4.
光ティスフは、第１図の（イ）部を拡大した第２図に示
すように、基板１１の表面に光記録媒体１２を形成して
構成されるが、本発明では、光記録媒体１２は、Ｔｇに
少量のＣｒを添付して形成されている。As shown in FIG. 2, which is an enlarged view of part (A) in FIG. 1, the optical disk is constructed by forming an optical recording medium 12 on the surface of a substrate 11. , Tg with a small amount of Cr attached.
光記録媒体１２は、真空蒸着装置内でＴｅの蒸着と同時
にＣｒを蒸着して形成することができる。The optical recording medium 12 can be formed by evaporating Cr simultaneously with the evaporation of Te in a vacuum evaporation apparatus.
この方法により、Ｔｇに対するｃｒの比率を５重量％と
じて６００ノの膜厚の光記録媒体を形成したところ、書
込み特性は従来のＴａ媒体と同等であった。そして、こ
の光記録媒体の安定性を６０°Ｃ、９０にＲＨの高湿度
雰囲気中で測定した結果、第６図の曲線Ａに示すように
、ごく初期に媒体の酸化量に対応する透過率比が多少増
加するが、その後は約３ケ月後においても媒体に劣化の
々いことが確認された。なお、従来のＴ−媒体で同様の
試験を行なうと、第６図の曲線Ｂに示すように、数日で
特性変化が表われてくる。When an optical recording medium with a film thickness of 600 mm was formed using this method with a ratio of Cr to Tg of 5% by weight, the writing characteristics were equivalent to those of a conventional Ta medium. As a result of measuring the stability of this optical recording medium in a high humidity atmosphere of 60°C and 90°C, we found that the transmittance corresponding to the amount of oxidation of the medium was very early, as shown by curve A in Figure 6. Although the ratio increased somewhat, it was confirmed that the medium continued to deteriorate even after about 3 months. Incidentally, when a similar test is conducted using a conventional T-medium, a change in characteristics appears in a few days, as shown by curve B in FIG.
このような効果は、Ｃｒを少量添加することによシ、光
記録媒体が大気との界面において電気化学的に安定な状
態になるために得られるものと考えられる。It is thought that such an effect is obtained because the optical recording medium becomes electrochemically stable at the interface with the atmosphere by adding a small amount of Cr.
次に、第４図に示すようにｃｒの添付量を変化させたと
ころ、５重置％以上で曲線Ｃに示すように媒体の血ｊ久
性の効果が顕著に表われることが明らかとなった。しか
し、１５％以上になると、曲線りに示すように書込み感
度が少しずつ低下して誉込みに必要なレーザ光エネルギ
が増加して行くことが確認された。すなわち、Ｃｒの添
付量を５〜１５％重駄比としたときに所望の結果が得ら
れるものである。Next, as shown in Fig. 4, when the amount of CR attached was varied, it became clear that the effect of blood retention of the medium was noticeable as shown in curve C at 5% or more. Ta. However, it was confirmed that when it exceeds 15%, the writing sensitivity gradually decreases as shown by the curve, and the laser beam energy required for writing increases. That is, the desired result can be obtained when the amount of Cr added is set at a weight ratio of 5 to 15%.
上述の散開では光記録媒体を同時蒸着法により形成する
例について述べたが、あらかじめＴｇとｃｒを合金化し
たものを１つのるつばを用いて蒸着する方法や、スパッ
タリング法で光記録媒体を形成しても同様の特性を備え
た媒体を得ることができる。In the above discussion, an example was described in which an optical recording medium is formed by a simultaneous vapor deposition method, but it is also possible to form an optical recording medium by a method in which Tg and Cr are alloyed in advance and vapor deposited using one crucible, or by a sputtering method. However, media with similar properties can be obtained.
発明の効果
以上述べたように、本発明によれば、Ｔｇに少量のＣｒ
を添加することにより高湿度雰囲気中での膜の劣化をな
くして書込み特性の低下を防止することが可能である。Effects of the Invention As described above, according to the present invention, a small amount of Cr is added to Tg.
By adding , it is possible to eliminate deterioration of the film in a high humidity atmosphere and prevent deterioration of writing characteristics.
そして、Ｃｒ’ｆ：Ｔａに対して５〜１５重量％添加し
た場合に最も優れた効果を奏することができる。The most excellent effect can be obtained when Cr'f:Ta is added in an amount of 5 to 15% by weight.
第１図は光ティスフの構造を示す斜視図、第２図乃至第
４図は本発明に係る光記録媒体の実施例を示すもので、
第２図は光ティスフ断面図、第６図および第４図はそれ
ぞれ実験結果を示すグラフである。
図中、１１は基板、１２は光記録媒体である。
特許出願人富士通株式会社FIG. 1 is a perspective view showing the structure of an optical disk, and FIGS. 2 to 4 show examples of the optical recording medium according to the present invention.
FIG. 2 is a cross-sectional view of the optical tissue, and FIGS. 6 and 4 are graphs showing the experimental results, respectively. In the figure, 11 is a substrate, and 12 is an optical recording medium. Patent applicant Fujitsu Limited
Claims (1)
混合材料よシ形成されたことを！Ｐｆ徴とする光記録媒
体。 ２、 ＣｒがＴａに対し５〜１５重量％の割合で混合
された特許請求の範囲第１項記載の光記録媒体。[Claims] 1. An optical recording medium for an optical disc is made of a mixed material of Te and Cr! An optical recording medium with Pf characteristics. 2. The optical recording medium according to claim 1, wherein Cr is mixed with Ta in a proportion of 5 to 15% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57172008A JPS5963038A (en) | 1982-09-30 | 1982-09-30 | Optical recording mediun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57172008A JPS5963038A (en) | 1982-09-30 | 1982-09-30 | Optical recording mediun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5963038A true JPS5963038A (en) | 1984-04-10 |
Family
ID=15933805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57172008A Pending JPS5963038A (en) | 1982-09-30 | 1982-09-30 | Optical recording mediun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5963038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0285112A2 (en) * | 1987-03-31 | 1988-10-05 | E.I. Du Pont De Nemours And Company | Optical recording element |
| EP0338862A2 (en) * | 1988-04-22 | 1989-10-25 | Mitsui Petrochemical Industries, Ltd. | Optical recording media and process for preparing same |
| EP0339889A2 (en) * | 1988-04-22 | 1989-11-02 | Mitsui Petrochemical Industries, Ltd. | Optical recording media and process for preparing same |
-
1982
- 1982-09-30 JP JP57172008A patent/JPS5963038A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0285112A2 (en) * | 1987-03-31 | 1988-10-05 | E.I. Du Pont De Nemours And Company | Optical recording element |
| EP0338862A2 (en) * | 1988-04-22 | 1989-10-25 | Mitsui Petrochemical Industries, Ltd. | Optical recording media and process for preparing same |
| EP0339889A2 (en) * | 1988-04-22 | 1989-11-02 | Mitsui Petrochemical Industries, Ltd. | Optical recording media and process for preparing same |
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