JPS6180531A - optical recording medium - Google Patents
optical recording mediumInfo
- Publication number
- JPS6180531A JPS6180531A JP59199378A JP19937884A JPS6180531A JP S6180531 A JPS6180531 A JP S6180531A JP 59199378 A JP59199378 A JP 59199378A JP 19937884 A JP19937884 A JP 19937884A JP S6180531 A JPS6180531 A JP S6180531A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- alloy
- optical recording
- sensitivity
- 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
- G11B7/242—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
-
- 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
- G11B2007/24304—Metals or metalloids group 2 or 12 elements (e.g. Be, Ca, Mg, Zn, Cd)
-
- 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
- G11B2007/2431—Metals or metalloids group 13 elements (B, Al, Ga, In)
-
- 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
- G11B2007/24312—Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
-
- 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
- G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
-
- 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
- G11B7/24—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
- G11B2007/24318—Non-metallic elements
- G11B2007/2432—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
- G11B7/242—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
- G11B2007/24318—Non-metallic elements
- G11B2007/24324—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
- G11B7/253—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
- G11B7/2531—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 glass
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は光記録媒体、特に書き換え可能な光記録媒体に
係る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an optical recording medium, particularly a rewritable optical recording medium.
現在、光ディスクは読取シ専用のもの、特に孔あけタイ
プの記録方式のものが主に用いられている。これに対し
て、書き換え可能な光記録方式もいくつか提案され、開
発が進められている。At present, read-only optical discs, particularly those with a perforation type recording system, are mainly used. In response, several rewritable optical recording systems have been proposed and are under development.
書き換え可能な光記録方式として、リンＰ、イオウＳｌ
ガリウムＧａｌゲルマニウムＧｅ、ヒ素Ａｓ。As a rewritable optical recording system, phosphorus P, sulfur Sl
Gallium, Germanium, Ge, Arsenic, As.
セレンＳｅ、インジウムＩｎ、ＱＳｎ＋アンチモンＳｂ
。Selenium Se, Indium In, QSn + Antimony Sb
.
テルルＴｅ＋鉛Ｐｂ、ビスマスＢｉ等を適宜混合した合
金薄膜にレーデ光を照射して、これらの材料を結晶状態
とアモルファス状態の間で変化させ、それによってレー
ザ光の反射率を変化させる方式が知られている。しかし
、これらの材料は結晶状態とアモルファス状態の間で体
積変化が大きく、疲労して劣化し易いという欠点がある
。そこで、この体積変化を抑制するために、通常、表面
に保護膜（二酸化珪素等）を設けている。この保護膜は
酸化等の腐食を防止する役割も担っている。A method is known in which a thin alloy film made of an appropriate mixture of tellurium Te, lead Pb, bismuth Bi, etc. is irradiated with LED light to change these materials between a crystalline state and an amorphous state, thereby changing the reflectance of laser light. It is being However, these materials have the disadvantage that their volume changes greatly between the crystalline state and the amorphous state, and they are easily fatigued and deteriorated. Therefore, in order to suppress this volume change, a protective film (such as silicon dioxide) is usually provided on the surface. This protective film also plays a role in preventing corrosion such as oxidation.
しかしながら、保護膜を設けても体積変化を完に記録媒
体の感度が低下するという問題が生じる。However, even if a protective film is provided, a problem arises in that the sensitivity of the recording medium decreases even if the volume change is completely suppressed.
本発明によシ上記問題点を解決する手段は、酸化タング
ステンｗｏ３母材中にＰ ｒ Ｓ ＃ Ｇａ＋Ｇｅ＋Ａ
ｓ＋Ｓｏ ＋ Ｉｎ ＋ Ｓｎ ＋ Ｓｂ ＋ Ｔｅ
＋ ＰｂおよびＢｉのうちの１種または複数種の元素の
合金を分散して成る薄膜であることを特徴とする光記録
媒体にある。According to the present invention, the above-mentioned problem is solved by adding P r S # Ga+Ge+A in the tungsten oxide WO3 base material.
s+So+In+Sn+Sb+Te
+ An optical recording medium characterized in that it is a thin film formed by dispersing an alloy of one or more elements of Pb and Bi.
薄膜の作成は共蒸着法、コス・母ツタ法等で行なうこと
ができる。The thin film can be formed by a codeposition method, a co-evaporation method, a Koss/Mother Ivy method, or the like.
ＷＯ，母材は空隙を多く有しているので、上記合金等の
体積変化を吸収する能力がある。そのため、光記録膜と
しての体積変化がなくなシ、劣化が防止され、また保護
膜を設けることによる感度低下もなくなる。Since the WO and base metals have many voids, they have the ability to absorb volume changes of the alloys, etc. mentioned above. Therefore, there is no volume change as an optical recording film, deterioration is prevented, and there is no reduction in sensitivity due to the provision of a protective film.
以下、便宜上、Ｐ ＋ Ｓ ＊ Ｇａ ｒ Ｇｏ 、Ａ
ｓ ＊ Ｓｓ等の合金を単に「合金」と称すると、ＷＯ
，と合金との混合比はｌ：５〜５：１が好ましい。この
混合比はＷＯ３１モルに対して合金の各成分原子のモル
数の合計のモル数に基づくものでおる。ＷＯ３の混合割
合が少ないと記録膜が変形（体積変化）シ、多いと反射
率変化が小さくなるからである。Hereinafter, for convenience, P + S * Gar Go, A
If alloys such as s*Ss are simply referred to as "alloys", WO
, and the alloy are preferably l:5 to 5:1. This mixing ratio is based on the total number of moles of each component atom of the alloy to 1 mole of WO3. This is because if the mixing ratio of WO3 is small, the recording film will be deformed (volume change), and if it is large, the reflectance change will be small.
この記録膜に保護膜を設けた場合の感度を考慮すると、
Ｗｏ３対合金合金記同様に表わした混合比は２：１〜ｌ
：５が好ましい。Considering the sensitivity when a protective film is provided on this recording film,
The mixing ratio expressed in the same way as Wo3 vs. alloy alloy is 2:1~l
:5 is preferable.
ガラスあるいはＰＭＭＡなどのグラスチックその他の基
体上に、Ｗｏ ３と”０．２Ｓ０．３ＳｂＱ、４ＧｅＯ
，１の合金を共蒸君してこれらの混合分散体からなるＮ
ｋＡを厚さ１０１００ｎ度形成した。記録媒体のうちあ
るものについては、その上に、ＳｉＯ□膜を蒸着して厚
さ２００ｎｍ程度の保護膜を形成した。Wo 3 and "0.2S0.3SbQ, 4GeO on glass or other glass substrates such as PMMA.
, 1 is co-evaporated to produce N consisting of a mixed dispersion of these.
kA was formed to a thickness of 10,100 nm. For some of the recording media, a protective film with a thickness of about 200 nm was formed by depositing a SiO□ film thereon.
こうして作成した記録媒体と、Ｗｏ３を用いないで”０
．２”０．３Ｓｂ０．４ＧｅＯ，１の合金だけを用いた
場合の記録媒体に、レーデ光で書き込みを行ない、それ
を微分干渉顕微鏡で観察したところ、合金だけの記録媒
体では変形（凹部）が観察されたが、実施例の記録媒体
では変形が観察されなかった。With the recording medium created in this way and without using Wo3,
．． When we wrote on a recording medium using only the 2"0.3Sb0.4GeO,1 alloy using Rede light and observed it with a differential interference microscope, we observed deformation (concavities) in the recording medium using only the alloy. However, no deformation was observed in the recording medium of the example.
記録媒体への書き込みは高いパワー密度（１０ｍＷ／
ｌ１ｍ ）で短時間（１００ｎｓ）レーデビームを照射
して合金をアモルファス化して行ない、一方、消去は低
いパワー密度（２ｍＷ／μｍ２）で長時間（１μｓ）レ
ーデビームを照射して合金を結晶化して行なった。こう
して書き込みおよび消去した記録媒体に０．１ｍＷ／μ
ｍ以下の微弱なレーデ光を照射し、フォトダイオードで
反射光量を検出した。書き込んだ箇所の反射光量をＲＡ
ｌ消去した箇所の反射光量をＲｃとすると、下記式で
コントラストを求Ｃ
また、記録媒体の感度は、第１図に示すように書き込み
レーデ光のパワー密度を低い値から次第に高めながらコ
ントラストを測定してゆき、コントラストが特定の値に
達するのに必要なレーデ光のパワー密度Ｐｔｈの逆数１
／Ｐｔｈとした。Writing to the recording medium requires a high power density (10mW/
The alloy was made amorphous by irradiating the alloy with a short-time (100 ns) Rede beam at a low power density (2 mW/μm2), while erasure was performed by crystallizing the alloy by irradiating the alloy with a Rede beam for a long time (1 μs) at a low power density (2 mW/μm2). . 0.1 mW/μ to the recording medium written and erased in this way.
A weak Raded light of less than m was irradiated, and the amount of reflected light was detected with a photodiode. RA the amount of reflected light at the written location
l If the amount of reflected light at the erased area is Rc, calculate the contrast using the following formula.Also, to measure the sensitivity of the recording medium, measure the contrast while gradually increasing the power density of the writing radar light from a low value, as shown in Figure 1. Then, the reciprocal number 1 of the power density Pth of the Rede light required for the contrast to reach a certain value
/Pth.
こうして、記録媒体の変形の有無、コントラスト、感度
を、合金とＷＯ，との混合比を様々に変えた記録媒体に
ついて測定した。その結果を第１表に示す。第１表では
感度をＷＯ，なし、保護膜なしの媒体の感度に規格化し
て示しである。In this manner, the presence or absence of deformation, contrast, and sensitivity of the recording media were measured for recording media with various mixing ratios of alloy and WO. The results are shown in Table 1. In Table 1, the sensitivity is normalized to the sensitivity of the medium without WO, without, and without a protective film.
臥下余日
第１表
第１表から、岡、の混合比が一定の値よシ多くなれば記
録媒体の変形が見られなくなることがわかる。しかし、
ＷＯ６の混合比の増加と共にコントラストおよび感度が
低下してゆくので、合金：Ｗｏ３の混合比は５：１〜１
：２が好ましいといえる。なお、表から、合金ｉｃｗｏ
、を混合して記録媒体の変形が見られなくなると、保題
膜を設けてもコントラストおよび感度が低下しないこと
が見られる。From Table 1, it can be seen that if the mixing ratio of Oka increases beyond a certain value, no deformation of the recording medium will be observed. but,
As the contrast and sensitivity decrease as the mixing ratio of WO6 increases, the mixing ratio of alloy:Wo3 should be 5:1 to 1.
:2 is preferable. Furthermore, from the table, the alloy icwo
, and when no deformation of the recording medium is observed, it can be seen that the contrast and sensitivity do not deteriorate even if a retaining film is provided.
本発明により、Ｐ、Ｓ、Ｇａ、Ｇｅ＋Ａａ、Ｓｓ＋Ｉｎ
＋５ｎｌＳｂｌＴ＠ｌＰｂ ｔたはＢｉの合金を用いた
書き換え可能な光記録媒体の変形を抑制して、劣化を防
止し、保護膜を設けた場合の感度を向上させることがで
きる。According to the present invention, P, S, Ga, Ge+Aa, Ss+In
+5nlSblT@lPb It is possible to suppress deformation of a rewritable optical recording medium using an alloy of t or Bi, prevent deterioration, and improve sensitivity when a protective film is provided.
第１図は記録媒体の感度を求めるためのレーデパワー密
度に関するコントラストのグラフ図である。FIG. 1 is a graph of contrast with respect to Lede power density for determining the sensitivity of a recording medium.
Claims (1)
ム、ゲルマニウム、ヒ素、セレン、インジウム、錫、ア
ンチモン、テルル、鉛およびビスマスのうちの１種また
は複数種の元素の合金を分散して成る薄膜であることを
特徴とする光記録媒体。1. A thin film made by dispersing an alloy of one or more elements from phosphorus, sulfur, gallium, germanium, arsenic, selenium, indium, tin, antimony, tellurium, lead, and bismuth in a tungsten oxide base material. An optical recording medium characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59199378A JPS6180531A (en) | 1984-09-26 | 1984-09-26 | optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59199378A JPS6180531A (en) | 1984-09-26 | 1984-09-26 | optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6180531A true JPS6180531A (en) | 1986-04-24 |
Family
ID=16406762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59199378A Pending JPS6180531A (en) | 1984-09-26 | 1984-09-26 | optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6180531A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070479A1 (en) * | 2002-02-22 | 2003-08-28 | Sony Corporation | Optical recording medium and optical recording method |
-
1984
- 1984-09-26 JP JP59199378A patent/JPS6180531A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003070479A1 (en) * | 2002-02-22 | 2003-08-28 | Sony Corporation | Optical recording medium and optical recording method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR890004263B1 (en) | Apparatus and method for recording and erasing optical information memory medium and information | |
| KR0153033B1 (en) | Thin film and information recording medium for information recording | |
| JPH1166611A (en) | Optical recording medium | |
| JPH08153339A (en) | Optical disk | |
| JPH0288288A (en) | Optical recording material composed of antimony-tin alloy containing third element | |
| JPS6180531A (en) | optical recording medium | |
| EP0050388B1 (en) | Optical information disk | |
| JPH0422437B2 (en) | ||
| JPH11110822A (en) | Optical recording medium and recording / reproducing method thereof | |
| US5385806A (en) | Optical information recording medium | |
| JPS6131291A (en) | Optical information-recording medium | |
| JPS63100632A (en) | Optical recording medium | |
| WO2002058060A1 (en) | Optical information recording medium | |
| JP4272934B2 (en) | Phase change optical recording medium | |
| US20030003260A1 (en) | Optical recording medium | |
| JPH0526668B2 (en) | ||
| JP2685754B2 (en) | Information recording medium | |
| JP2637982B2 (en) | Optical information recording medium | |
| JP2712207B2 (en) | Optical information recording medium | |
| EP0464941A1 (en) | Phase-change optical recording media | |
| JPH01115685A (en) | Optical recording medium | |
| JP2557407B2 (en) | Information recording medium | |
| JPH041933B2 (en) | ||
| JPS61168145A (en) | optical recording medium | |
| JPH03165341A (en) | Information recording medium |