JPS59217245A - Optical recording medium - Google Patents

Optical recording medium

Info

Publication number
JPS59217245A
JPS59217245A JP58091744A JP9174483A JPS59217245A JP S59217245 A JPS59217245 A JP S59217245A JP 58091744 A JP58091744 A JP 58091744A JP 9174483 A JP9174483 A JP 9174483A JP S59217245 A JPS59217245 A JP S59217245A
Authority
JP
Japan
Prior art keywords
thin film
sublimable material
recording medium
optical recording
thin
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
Application number
JP58091744A
Other languages
Japanese (ja)
Inventor
Nagaaki Etsuno
越野　長明
Yasuyuki Goto
康之 後藤
Itaru Shibata
格 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP58091744A priority Critical patent/JPS59217245A/en
Publication of JPS59217245A publication Critical patent/JPS59217245A/en
Pending legal-status Critical Current

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
    • 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
    • G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
    • 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
    • G11B7/00452—Recording involving bubble or bump forming
    • 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
    • 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
    • G11B7/257—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
    • G11B7/2572—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 organic materials
    • G11B7/2575—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 organic materials resins

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

PURPOSE:To provide an optical recording medium which permits writing of information thereon by laser light of a small output with high sensitivity, has excellent resistance to corrosion and withstands long-term storage by providing a thin film contg. a metal of gold or platinum group via a thin transparent film consisting of a sublimable material on a base plate. CONSTITUTION:A recording layer 2 consisting of a thin film contg. a metal of a gold or platinum group is formed via a thin film consisting of a sublimable material on a transparent plastic base plate 1 of polymethyl methacrylate or polycarbonate. Various phthalocyanines including, for example, copper phthalocyanine are usable for the sublimable material. If laser light for writing of information is irradiated to such optical recording medium, the thin metallic film heats up and softens by absorbing the laser light. The heat is transmitted to the thin film consisting of the sublimable material adjacent thereto, by which the film is evaporated to have the increased pressure. The softened thin metallic film is thus extruded and a bubble-shaped deformation is generated. The pressure increase owing to the evaporation of the sublimable material is applied in this invention in the above-mentioned way so that the definite writing by the light power smaller than in the prior art is accomplished.

Description

【発明の詳細な説明】 （ａｌ　　発明の技術分野 本発明は光記録媒体、特１（高感度でかつ優れた安定性
を有する光記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an optical recording medium, particularly 1 (optical recording medium having high sensitivity and excellent stability).

（ｂ）　　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
書込み及び読出しができること、ちりやほこりの影響に
強いことなどの特徴をもつ記録媒体である。(b) Background of the Technology Optical disks are recording media that are capable of recording large amounts of information, can be written and read 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あり、ポリメチル
メタアクリレ−）　（ＰＭＭＡ）やポリカーボネイトな
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層２を形成し、記録層２を内側
に向けてスペーサ３を介して封止した構造がとられてい
る７゜ かかる光ディスクはレーザ光によって情報の書込み及び
読出しが行なわれるが、この際にレーザ光はレンズによ
って直径が１〔μｍ〕程度の小さな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
１〔μｍ２〕程度の微小面積で済むことから大容量記録
が可能となる１、またレーザ光を用いた書込み及び読出
しの際に、透明基板１の外表面上におけるレーザ光のス
ポットの直径は１　［ｒｎｍ）程度とすることができる
ために、この面上に数１０〔μｍ〕程度のちシやほこり
が存在しても書込み及び読出しに殆んど影響を及はさな
い。FIG. 1 is a structural diagram of such an optical disc, in which a recording layer 2 made of a thin film of metal or semimetal is formed on a transparent plastic substrate 1 made of polymethyl methacrylate (PMMA) or polycarbonate. Information is written and read using a laser beam on such a 7° optical disc, which has a structure in which the recording layer 2 faces inward and is sealed via a spacer 3. At this time, the diameter of the laser beam is reduced by a lens. It is possible to narrow down the spot to a small spot of about 1 [μm], and therefore the area required to record one bit of information is only about 1 [μm2], making large-capacity recording possible1. During writing and reading, the diameter of the laser beam spot on the outer surface of the transparent substrate 1 can be about 1 [rnm]. Even if it exists, it has little effect on writing and reading.

（Ｃ１従来技術と問題点 従来行なわれている光記録媒体は下記の２種に大別され
る。その第１は記録材料としてテルル（Ｔｅ）、ビスマ
ス（Ｂｉ　）等の低融点金属の薄膜を用いるものであっ
て、レーザ光の照射によって第２図（ａ）に示す如き穴
が形成される。この低融点金属の薄膜は高感度ではある
が、酸化され易く長期間の保存に耐えないという問題点
がある。(C1 Prior Art and Problems Conventional optical recording media are roughly divided into the following two types. The first uses a thin film of a low melting point metal such as tellurium (Te) or bismuth (Bi) as a recording material. Holes as shown in Figure 2(a) are formed by irradiation with laser light. Although this thin film of low melting point metal is highly sensitive, it is easily oxidized and cannot be stored for long periods of time. There is a problem.

また第２は記録材料として、金（Ａｕ　）、白金（Ｐｔ
　）等の貴金属の薄膜を用いるものである。この貴金属
系薄膜は熱可塑性基板上又は基板上に設けた厚さ０．０
１［μｍ］乃至数〔μｍ〕程度の熱可塑性樹脂層上に設
けられて、レーザ光の照射によって第２図（ｂｌに示ず
如きバブル状変形が形成される。この貴金属薄膜は耐食
性に優れて長寿命ではあるが、情報の書込みに大きいパ
ワーが必要であって、大出力レーザ光源を必要とすると
いう問題点がある。The second is gold (Au) and platinum (Pt) as recording materials.
) and other noble metal thin films are used. This noble metal thin film is formed on a thermoplastic substrate or on a substrate with a thickness of 0.0
It is provided on a thermoplastic resin layer with a thickness of about 1 [μm] to several [μm], and a bubble-like deformation as shown in Fig. 2 (bl) is formed by irradiation with laser light. Although it has a long lifespan, it has the problem that it requires a large amount of power to write information and requires a high-output laser light source.

（ｄｌ　　発明の目的 本発明は先に述べた問題点を解決するために、前記低融
点金属系と同程度に高感度で小出力のレーザ光で情報を
書込むことができ、しかも耐食性に優れて長期間の保存
に耐える光記録媒体を提供することを目的とする。(dl Purpose of the Invention) In order to solve the above-mentioned problems, the present invention has the ability to write information with a low-output laser beam with the same high sensitivity as the low-melting point metal system, and has excellent corrosion resistance. The purpose is to provide an optical recording medium that can withstand long-term storage.

ｔｅｌ　　発明の構成 本発明の前記目的は、基板上に昇華性物質からなる透明
な薄膜を介して、金又は白金族の金属を含む薄膜が設け
られてなる光記録媒体により達成される。tel Structure of the Invention The above object of the present invention is achieved by an optical recording medium in which a thin film containing gold or a platinum group metal is provided on a substrate via a transparent thin film made of a sublimable substance.

前記透明な薄膜を形成する昇華性物質としては、例えば
銅７タロシアニンをはじめとして、バナジウムフタロシ
アニン、鉛フタロシアニン等の各種の７タロシアニンを
用いることができる。As the sublimable substance forming the transparent thin film, various types of 7-thalocyanine such as copper 7-thalocyanine, vanadium phthalocyanine, and lead phthalocyanine can be used.

又、金又は白金族の金属、すなわち白金、パラジウム、
イリジウム、ロジウム、オスミウム及びルテニウムを含
む薄膜は、これらの金属単体もしくは相互間の合金よシ
も、例えば金・ゲルマニウム合金レｙ　（ＡｕＧｅＳｅ
）　＊金・アンチモン（ＡｕＳｂ）。Also, gold or platinum group metals, i.e. platinum, palladium,
Thin films containing iridium, rhodium, osmium and ruthenium can be made of these metals alone or as alloys of each other, such as gold-germanium alloy (AuGeSe).
) *Gold/antimony (AuSb).

金・シリコン（Ａｕｇｉ）　＋金・錫（ＡｕＳｎ）等の
他種金員を含む低融点の合金が適当であるが、金又は白
金族の金属の原子分率の合計が０．５以上であることが
望ましい。A low melting point alloy containing gold/silicon (Augi) + other metals such as gold/tin (AuSn) is suitable, but the total atomic fraction of gold or platinum group metals is 0.5 or more. This is desirable.

本発明の光記録媒体に情報書込みのためのレーザ光照射
を行うとき、前記金属薄膜はレーザ光を吸収して温度が
上昇し軟化する。またその熱が隣接する昇華性物質から
なる薄膜に伝導されてこれが気化し、圧力が高まって軟
化した金属薄膜が押出されバブル状の変形が生ずる。When the optical recording medium of the present invention is irradiated with laser light for writing information, the metal thin film absorbs the laser light, increases in temperature, and becomes soft. The heat is also conducted to the adjacent thin film made of a sublimable substance, vaporizing it, increasing the pressure and extruding the softened metal thin film, resulting in bubble-like deformation.

本発明においては、この様に昇華性物質の気化による圧
力上昇を応用することにより、従来よシ少ない光パワー
によって明確な書込みを行なうことができる。In the present invention, by applying the pressure increase due to vaporization of the sublimable substance in this manner, clear writing can be performed with less optical power than in the past.

（ｆ）　　発明の実施例 以下本発明を実施例により図面を参照して具体的に説明
する。(f) Embodiments of the Invention The present invention will be specifically described below by way of embodiments with reference to the drawings.

直径約３０　ＣｃｒＩＩ）、厚さ約１．５　（ｍｍ　）
の透明ＰＭＭＡ基板ｌｌ上に、銅７タロシアニン膜１２
を厚さ約３０　（ｎｍ：ＩＫ、次イで金・ゲルマニウム
・セレン（ＡｕＧｅＳｅ）合金膜１３を厚さ約２０（ｎ
ｍ）に真空蒸着法によって形成する。ただし本実施例に
おいては合金膜１３の各成分の原子分率がＡｕ　：　Ｇ
ｏ　：Ｓｅ　−０，７：　０．２　：　０．１となる様
に、金・ゲルマニウム合金及びセレンの蒸発速度を選択
制御している。Diameter approx. 30 CcrII), thickness approx. 1.5 (mm)
Copper 7 talocyanine film 12 on a transparent PMMA substrate 12
A gold-germanium-selenium (AuGeSe) alloy film 13 is deposited to a thickness of approximately 20 nm (IK) to a thickness of approximately 30 nm (IK).
m) by a vacuum evaporation method. However, in this embodiment, the atomic fraction of each component of the alloy film 13 is Au:G.
The evaporation rates of the gold-germanium alloy and selenium are selectively controlled so that o:Se-0,7:0.2:0.1.

（第３図（ａｌ参照） なお比較のために、同一のＡｕ　Ｇｅ　Ｓｏの合金膜を
直接にＰＭＡ基板上に設けた第１の比較試料及び同一膜
厚のテルル（Ｔｅ　）薄膜をＰＭＡ基板上に設けた第２
の比較試料を製作している。(See Figure 3 (al)) For comparison, a first comparison sample was prepared in which the same AuGeSo alloy film was provided directly on a PMA substrate, and a tellurium (Te) thin film with the same thickness was provided on a PMA substrate. The second
Comparative samples are being produced.

上述の実施例の光記録媒体を１８００［ｒｒｔｎ：］で
回転し、波長８３０（ｎｍ）のレーザ光を１〔μｍ〕径
に集束して照射して、記録層すなわち前記Ａｕ　Ｇｅ５
ｓ合金膜１３に光パワー１２（ｍＷ）でバブル状変形を
記録することができた。（第３図（ｂ）参照）同一照射
方法によって、前記第１の比較試料については光パワー
１５（ｍＷ〕を必要とし、また前記第２の比較試料につ
いては、本実施例と同じく１２（ｍＷ）の光パワーでＴ
ｅ薄膜に記録穴が形成された。The optical recording medium of the above embodiment is rotated at 1800 [rrtn:] and irradiated with a laser beam having a wavelength of 830 (nm) focused to a diameter of 1 [μm] to form the recording layer, that is, the Au Ge5
Bubble-like deformation could be recorded in the s-alloy film 13 with an optical power of 12 (mW). (See FIG. 3(b)) Using the same irradiation method, the first comparison sample requires an optical power of 15 (mW), and the second comparison sample requires an optical power of 12 (mW) as in this example. ) with optical power T
eA recording hole was formed in the thin film.

更に本実施例及び比較試料をその薄膜面を露出した状態
で、温度６ｏ〔℃〕、相対湿度９０（％〕の条件下で保
存して、本実施例及び第１の比較試料については、６個
月経過後においても書込みに要する光パワーがそれぞれ
初期値から変化せず、また光透過率も何れも約３０　［
：％）と初期値と同一であるのに対して、Ｔｅ薄膜を設
けた第２の比較試料については、２週間経過後において
既に書込みに要する光パワーが約２０（ｍＷ）に増加し
、更に光透過率も初期値の約３０　Ｃ％）から約５０　
Ｃ％）に増大している。Further, the present example and the first comparative sample were stored with their thin film surfaces exposed under conditions of a temperature of 6 o [°C] and a relative humidity of 90 (%). Even after several months have passed, the optical power required for writing does not change from the initial value, and the light transmittance remains about 30 [
:%) is the same as the initial value, but for the second comparison sample with a Te thin film, the optical power required for writing has already increased to about 20 (mW) after 2 weeks, and further increases. The light transmittance also increased from the initial value of about 30 C%) to about 50 C%.
C%).

以上の比較試験結果から、本発明による昇華性物質から
なる薄膜を介して金又は白金族の金属を含む薄膜が設け
られた光記録媒体は、従来の低融点金属系の光記録媒体
と同等の記録感度を有し、かつ安定性が優れて長期間の
保存に耐えることが知られる。From the above comparative test results, it is clear that the optical recording medium provided with a thin film containing gold or a platinum group metal via a thin film made of a sublimable substance according to the present invention is equivalent to the conventional low-melting point metal-based optical recording medium. It is known to have high recording sensitivity, excellent stability, and can withstand long-term storage.

以上の説明は何れも光ディスクを対象としているが、本
発明の光記録媒体は、シート状或いはテープ状など任意
の形状とすることができる。Although the above explanations are all directed to optical discs, the optical recording medium of the present invention can have any shape such as a sheet or tape shape.

ｔｇｌ　　発明の詳細 な説明した如く本発明によれば萬感度でしかも長期間安
定な光記録媒体が提供され、書込み用光源のレーザとし
て半導体レーザを使用することが可能となって光情報記
録装置の小型化、低価格化が促進され、かつシステムと
しての信頼性が大きく向上することによって、高度の尋
問的業務から一般的な民生機器までの広範囲な分野の要
望に応えることができる。tgl As described in detail, the present invention provides an optical recording medium that has unlimited sensitivity and is stable for a long period of time, and makes it possible to use a semiconductor laser as a writing light source, thereby improving the performance of optical information recording devices. By promoting miniaturization and cost reduction, and greatly improving the reliability of the system, it is possible to meet the needs of a wide range of fields, from advanced interrogation work to general consumer equipment.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は光ディスクの構造の例を示す斜視図、第２図（
ａ）４ｇ及び（ｂ）は光記録媒体における情報記録状態
の例を示す断面図、第３図（ａｌ及び（ｂｌは本発明の
実施例について、それぞれ記録の書込み前及び後の状態
を示す断面図である。 図において、１１は基板、１２は昇華性物質からなる薄
膜、１３は金又は白金族の金属を含む薄膜を示す。 第１１ａ 第２　図 （７２）　　　　　　　　　　　　　　　　　　（６）
第３　区 （４）Figure 1 is a perspective view showing an example of the structure of an optical disc, Figure 2 (
a) 4g and (b) are cross-sectional views showing examples of information recording states on optical recording media; FIG. In the figure, 11 is a substrate, 12 is a thin film made of a sublimable substance, and 13 is a thin film containing gold or a platinum group metal. 11a FIG. 2 (72) (6)
Ward 3 (4)

Claims (1)

【特許請求の範囲】[Claims] 基板上に、昇華性つ質からなる透明な薄膜を介して、金
又は白金族の金属を含む薄膜が設けられてなることを特
徴とする光記録媒体。An optical recording medium characterized in that a thin film containing gold or a platinum group metal is provided on a substrate with a transparent thin film made of a sublimable substance interposed therebetween.
JP58091744A 1983-05-25 1983-05-25 Optical recording medium Pending JPS59217245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58091744A JPS59217245A (en) 1983-05-25 1983-05-25 Optical recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58091744A JPS59217245A (en) 1983-05-25 1983-05-25 Optical recording medium

Publications (1)

Publication Number Publication Date
JPS59217245A true JPS59217245A (en) 1984-12-07

Family

ID=14035035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58091744A Pending JPS59217245A (en) 1983-05-25 1983-05-25 Optical recording medium

Country Status (1)

Country Link
JP (1) JPS59217245A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62202344A (en) * 1986-02-28 1987-09-07 Toshiba Corp Optical recording medium
EP0917139A2 (en) * 1997-11-17 1999-05-19 Eastman Kodak Company Recordable optical disks with dielectric interlayer
EP0917138A3 (en) * 1997-11-17 1999-11-03 Eastman Kodak Company Recordable optical disks with metallic interlayer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62202344A (en) * 1986-02-28 1987-09-07 Toshiba Corp Optical recording medium
EP0917139A2 (en) * 1997-11-17 1999-05-19 Eastman Kodak Company Recordable optical disks with dielectric interlayer
EP0917139A3 (en) * 1997-11-17 1999-11-03 Eastman Kodak Company Recordable optical disks with dielectric interlayer
EP0917138A3 (en) * 1997-11-17 1999-11-03 Eastman Kodak Company Recordable optical disks with metallic interlayer

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