TW495750B - Phase-change recording medium for write once applications - Google Patents

Phase-change recording medium for write once applications Download PDF

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Publication number
TW495750B
TW495750B TW089105238A TW89105238A TW495750B TW 495750 B TW495750 B TW 495750B TW 089105238 A TW089105238 A TW 089105238A TW 89105238 A TW89105238 A TW 89105238A TW 495750 B TW495750 B TW 495750B
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Taiwan
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layer
phase change
data
recording medium
phase
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TW089105238A
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English (en)
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Yuan-Sheng Tyan
George Russell Olin
Giuseppe Farruggia
Bruno Primerano
Fridrich Vazan
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Eastman Kodak Co
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    • 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
    • G11B7/241—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
    • G11B2007/24312—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
    • G11B7/252—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
    • G11B7/254—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 protective topcoat layers
    • G11B7/2542—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 protective topcoat layers consisting essentially of organic 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
    • G11B7/257—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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Description

495750 五、發明說明（i) 本明乃關於特別適合作一次寫入多次讀出（WORM)用途之 相位改變記錄媒體。 近年來已漸增光學記錄之使用，以發表，分配，儲存及 檢復數位資訊，此係以聚焦一雷射波束，在通常成為一旋 轉碟形式之光學記錄媒體上寫入及/或讀取資訊達成之使 用僅ΐ買記憶Is ( R 0 Μ )格式時’貢訊係在工廠中以編碼之小 符號預製于該碟上，並用雷射波束回讀該資訊，用可寫入 之格式時，則使用雷射波束經由各種實體記錄機構以產生 小而編碼之記號。此許可使用者得以記錄其本人之貧料于 該碟上，若干記錄實體機構係可逆轉者，所記錄之符號可 消除及可重複再製。使用此種構構之磁碟稱為可抹除或可 再寫入碟。若干此等實體機構乃係單向，各符號一經製 妥，不能逆轉或改變，且不留下可探測之明晰可辨別痕 跡。使用此等機構之磁碟稱為WORM碟，每一此種磁碟乃適 合作若干實際之應用。 本發明集中於WORM磁碟。近年來此種可記錄之精密磁碟 (CD-R)，即WORM碟之普遍使用，暗示對WORM碟之需求極 強。此種格式係適合許多用途，其中資料被儲存于此種格 式中時乃不可能對内容作任何修正，且不留下容易探測之 痕跡。此種格式亦適于作其中不需要例如供發表及分配用 之再寫入可能性之許多應用，在此等用途中，WORM碟乃吾 人所想望者，設若該碟能以較之可重寫更低之代價供應。 許多實體機.構已用於WORM記錄，第一種實用WORM碟利用 奪格記錄（ablative recording)其中乃使用脈衝式雷射波
O:\63\63374.ptd 第6頁 495750 五、發明說明（2) —- 束以產生在該記錄層中之有形凹槽。此種機構要求磁碟成 為空氣疊層結構，使記錄層之表面在凹槽形成過程中免為 任何實質妨碍，另一機構則係使用雷射波束引起數層之 融或化學相互作用而成為不同之層。此種機構因較高雷射 功率之要求及難以製成多層疊合之結構而有缺失，另二種 機構則使用有機染料作為記錄層。雖然成功地使用于⑶一尺 碟中’此種機構患於其強烈之波長倚賴性。使用于Μ。事 置中之光學頭例如工作于65 〇 nm者係無法讀取經設計為1工 作于78 0 nm之CD波長之(^^碟，又另一種機構係使用相位 改變媒體，與較為普通之可抹除相位改變媒體成對比，此 等WORM媒體乃設計為經由如同沉積之無定形相之曰 — 田巧j 曰日 而記錄貢料。經將此等物料設計成實際上無法使雷射結晶 狀態逆轉為無定形狀態。雖然此種機構能將上述之各問題 減至最小或消除大部分，但其記錄極性乃係獨特者，結晶 記錄之符號較之其無定形背景具有更高之反射性，與^ $ 數之其他記錄機構相反。此使其難以製成多功能之驅 置。 ^ 因此本發明之目的在提供能避免上述各問題之創新㈣. 媒體。 本發明之另一目的為提供具有真正低價結構之WORM媒 體’故對WORM功能性非屬必需之各種應用能自有此等媒體 獲益。 、 上述之目的乃以包含下列者之一種記錄媒體達成： (a ) —透明之基體；
第7頁 五、發明說明（3) (b)設于該透明基體上之—結晶相位改變層； (C)該于該相位改變層上之一介質層； (d)认于該"質層上之—金屬反射物層；及 ， (e )該結晶相位改變層呈古 # At + &雙增具有經選擇之厚度及相位改變物 _祛之京入眭 ^ ^ ”，、入時圮錄于其中，但在第二次或 5〇%之增加。 之貝科在貧料之不安定方面至少有 材料，1 見屬適當選擇此種磁碟之結構與 叮产危# π企丄 改變物料製成WORM碟。此種物料 可在無定形與結晶相間循環 ^ ΐΐ之iL 擇于記錄期間產生可探測之不逆轉 改變之此種相位改變材料及磁碟結構而不作重寫資料之： 何試圖，仍將留下可掇測夕戏从 个扑里禺貝料之任 w人π、I m殘餘’即使所記錄之層本身正 目 ^ ,9Ϊ 變兀…、不過為使一 WORM媒體合格起 見’可彳木測之殘餘必彡盲足热 ,,^ ^ m ^ 〇η ^綫餘义肩足岣大，俾與資料降格之其他可能 原因有明破之區別。就孰拉女 b 4- ^ X ^ ^ . 就熟叫本技藝之人士而言，資料對時 鐘之不穩疋性係通常用以描述回讀資料品質之參數: 就DVD - ROM磁磾而f，y千次社极士 ♦:而。關于貝枓對時鐘不穩定性之規格為 .ns采測定時窗之8%。如若資料對時鐘之不稃定 由此數值之50%降低至12%以上，則能容易發現此： f發明係特別適于提供一種ff〇RM記錄媒體，使用藉雷射 波束之應用’能在無定形及結晶狀態間循環之相位改變材 料。本發明亦適于提供此種㈣題媒體，具有與可重寫媒體 非常相似之物理與記錄特性，故係更易于提供能處理該
第8頁 495750 五、發明說明（4) —------ 種媒體之多功能讀/寫驅動。本發明亦提供具有較簡 =構，RM媒體，I以較可重寫媒體更易于製造及成本曰 二ί發：之一項特色為使用與用於可重寫入媒體者相同 r;，促供WORM媒體是以該兩種媒體能參加同一生 備以降低成本。 座裝 圖式之簡單說明 圖1為描述本發明之一光學記錄媒體例WW〇RM之 面圖。 八研 圖2a及2b舉例說明根據本發明分別自一光學記錄媒體之 第 夂寫入及第二次寫入所得讀回資料之目視圖型。 圖3 a及3 b舉例說明根據本發明分別自一光學記錄媒體之 第次寫入與第二次寫入所得讀回資料之了 1A光譜。 首先翻至圖1，其中一 WORM記錄媒體1〇被製成具有由相 位改變材料形成之層1 2，該層能因雷射波束之施加而在無 疋形狀態與結晶狀態間循環。該W Q⑽記錄媒體1 〇之結構包 括一透明基體14，沉積于透明基體14上及與其密切接觸之 相位改變層12，一介質層16 —金屬反射物層18及隨意之一 保護層2 0。雖然相位改變層1 2乃以直接在透明層1 4上形成 者為較佳，可瞭解者，一中間層（未圖示）可設于相位改變 層12與透明基體14之間。透明基體14可有若干形式，而以 透明之聚碳酸酯結構為優先選擇，介質層丨6亦可採用不同 之形式，例為SiN，AIN，ZnS-Si02混合物。金屬反射物層 18可由金’鋁，銀或其合金形成，相位改變層12之材料可 包括録碲及鍺之合金或錄碲銦及銀之合金，又在相位改變
、發明說明（5) __ 1 ο 、I, 曰 τ之相位改變材料亦可板攄八々， 、u 而成，式中Μ為選自金，銀，銅V Η蹄xVy y組合 及錯之名單中所選擇之-或更V之銘，鎵，銦’桂，鍺踢 0.1〜0.4。 Λ更多之疋素，40.2，- 相位改變層12應選擇
〇以夕于12 nm為佳。使用所選擇之 次U =該媒體上時因跳動之降格變成具V，明白顯示資料 例說明從一良好寫入之磁碟所得讀回信 見圖型係由熟諸本技術者用以判斷讀回信號： :質：：圖2&中之一目視圖型具有清晰分隔之線條交又者 表不月“吏所記錄資料有高度逼真讀回之良好㈣，另一方 面，圖2b舉例說明在讀回所記錄資料時導致困難之已 目視圖型。 圖3a舉例說明從一良好寫入之磁碟所得讀回信號之時間 -區間为析（TIA)光譜。TIA光譜係由精于本技藝人士用以 判斷讀回彳§號之品質’具有良好分開之尖峯之τ丨A光譜如 圖3a所例示者表示能使所記錄資料有高度逼真讀回之良好 信號。另一方面圖3b則舉例說明一降格之TIA光譜，各光 峯變成不能互相辨別及使資料解碼變得困難。 下列各實例說明本發明之詳細情形。 實例1 碟形之WORM媒體係使用銻Q 68碲0 32合金薄膜作為相位改 變層而製成9 · 4 nra薄膜層係喷射沉積于〇 · 6瓜瓜聚碳酸酯基
第10頁 495750
五、發明說明（6) 體之有溝紋表面，使用相同組合物之目的物作為薄膜設在 該基體上之溝紋乃用以于記錄期間及回放過程中引導雷f 波束一含有組合物（ZnS)0.9 (Si02)之35 nm介質層係於其 後喷射沉積于該相位改變層上，繼此層之後則為Al-2% Cr 合金製之100 nm反射物層。然後將5 /zm厚之UV聚合物層施 加于Al-2% Cr層之表面。 其次進行該磁碟之初步工作/，使用20 直徑之氬（Ar) 雷射波束掃描該碟之表面，以使相位改變層在該碟之大部 份表面上結晶化。
使用一雷射波束記錄器完成記錄作業，該記錄器具有 光學頭及一 〇·6 NA物鏡，該光學頭則用635 11111波長之雷 射。使該碟以3 · 5 m / s線速度旋轉，用脈衝雷射列將隨機 之14之8 (EFM)資料圖型錄下，使用相同之光學頭回讀所記 錄之貧料，測得日期時鐘之不穩定性為3· 72 ns。為圖2a 中所不之讀回信號之目視圖型乃係非常完全以及圖3 a中之 時間-間隔-分析器資料指示明顧可辨別之光峯。所有此等 資料表示所記錄之資料可讀回而具有良好之保真度。
然後完成重複寫入實驗，其中將另一14之8調制（EFM)圖 型Ϊ寫于先前之資料上。讀回新資料之努力現變成非常困 難貝料對時鐘之不穩定性增加至7 · 9 5 nS，目視圖型變成 洗去（圖2b)以及時間-間隔—分析器不能再區別資料先鋒 (圖3b)。該磁碟之別為_如仰“碟，任何重寫資料于該 碟之企圖無法不留下可探測之痕跡達成。 Λ 實例2
第11頁 495750 五、發明說明（7) 如實例1中所述製成一系列磁碟，唯相位改變層之厚度 自7· 7 nm變為1 1 · 9 nm。完成記錄及重寫入實驗如實例1所 述者。下表1概述各數據 ^ 表1 對各種相位改變層厚度之磁碟作初次寫入及重覆寫入之資料對時鐘不穩定性數據 磁碟編號 相位改變厚度，nm 資料對時鐘不穩定 性首次寫入，ns 資料對時鐘不穩定 性再寫入，ns 1 7.7 3.66 10.68 2 8.5 3.64 8.62 3 9.4 3.72 7.95 4 10.2 3.88 6.84 5 11.1 4.36 6.22 6 11.9 4.46 5.37
實例1中所述之磁碟包括此表内。 從表1可看出就所有此等磁碟而言，當執行重覆寫入 時，數據即降級，不過降級之量厥視相位改變層之厚度而 定。關于實驗中所用之材料，僅具有小于約1 2 nm之相位 改變層者顯示資料對時鐘不穩定性中之5 0%降格，以保證 盡力重寫之不致誤解信號。 元件表列
10 記錄媒體 12 相位改變層 14 基材 16 介電層 18 金屬反射層
第12頁 495750
第13頁

Claims (1)

  1. 495750 _案號89105238 今/年么月β曰 修正__ 六、申請專利範圍 1 . 一種記錄媒體，包含： (a ) —透明之基體； (b) 設于該透明基體上之一結晶體相位改變層； (c) 設于該相位改變層上之一介質層； (d) 設于該介質層上之一金屬反射物層；及 (e )該結晶體相位改變層具有經選擇之厚度及相位改變 材料，故資料能于第一次寫入時記錄于該層上，但在第二 次及爾後之寫入時，所寫入之資料在資料不安定性上有至 少5 0 %之增加。 2. —種記錄媒體，包含： (a ) —透明之基體； (b)與該基體成緊密接觸之一結晶體相位改變層； (c )設于該相位改變層上之一介質層； (d)設于該介質層上之一金屬反射物層；及 (e )該結晶體相位改變層具有經選擇之厚度及相位改變 材料，故資料能于第一次寫入時記錄于該層上，但在第二 次及爾後之寫入時，所寫入之資料在資料不安定性上有至 少5 0 %之增加。 3. 根據申請專利範圍第2項之記錄媒體，其中相位改變 層之厚度係少于20 nm(毫微米）。 4. 根據申請專利範圍第2項之記錄媒體，其中相位改變 層包括由公式（録η碲)(）l_yMy所組成之材料，其中Μ係自 金，銀，銅，I呂，鎵，銦，娃，鍺，錫及錯之名單中所選 出之一或更多之元素，y$0.2， 0·1$χ$0·4。
    O:\63\63374-910612.ptc 第14頁 495750 修正 案號 89105238 六、申請專利範圍 5 ·根據申請專利範圍第1項之記錄媒體，其中該相位改 變層包含録蹄及錯之合金。 6 ·根據申請專利範圍第2項之記錄媒體，其中該相位改 變層由録蹄銦及銀之合金組成。
    O:\63\63374-910612.ptc 第15頁
TW089105238A 1999-05-18 2000-03-22 Phase-change recording medium for write once applications TW495750B (en)

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US7668054B2 (en) 2002-12-11 2010-02-23 Lg Electronics Inc. Method of managing overwrite and method of recording management information on an optical disc write once
US7672204B2 (en) 2003-01-27 2010-03-02 Lg Electronics Inc. Optical disc, method and apparatus for managing a defective area on an optical disc
US7672208B2 (en) 2003-08-05 2010-03-02 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording/playback management information on/from optical disc
US7684293B2 (en) 2003-05-09 2010-03-23 Lg Electronics Inc. Write once optical disc, and method and apparatus for recovering disc management information from the write once optical disc
US7701823B2 (en) 2002-09-30 2010-04-20 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording management information on write-once optical disc
US7783829B2 (en) 2003-09-08 2010-08-24 Lg Electronics Inc. Write-once optical disc and method for recording management information thereon
US7813243B2 (en) 2003-01-11 2010-10-12 Lg Electronics Inc. Optical disc of write once type, method, and apparatus for managing defect information on the optical disc
US7911900B2 (en) 2003-09-08 2011-03-22 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording management information on the write-once optical disc
US8045430B2 (en) 2002-09-30 2011-10-25 Lg Electronics Inc. Write-once type optical disc, and method and apparatus for managing defective areas on write-once type optical disc using TDMA information
US8054718B2 (en) 2003-07-15 2011-11-08 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording management information thereon
US8296529B2 (en) 2003-09-08 2012-10-23 Lg Electronics Inc. Write-once optical disc and method for recording management information thereon
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US8045430B2 (en) 2002-09-30 2011-10-25 Lg Electronics Inc. Write-once type optical disc, and method and apparatus for managing defective areas on write-once type optical disc using TDMA information
US7701823B2 (en) 2002-09-30 2010-04-20 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording management information on write-once optical disc
US7668054B2 (en) 2002-12-11 2010-02-23 Lg Electronics Inc. Method of managing overwrite and method of recording management information on an optical disc write once
US7936649B2 (en) 2002-12-11 2011-05-03 Lg Electronics Inc. Method of managing overwrite and method of recording management information on an optical disc write once
US7813243B2 (en) 2003-01-11 2010-10-12 Lg Electronics Inc. Optical disc of write once type, method, and apparatus for managing defect information on the optical disc
US7672204B2 (en) 2003-01-27 2010-03-02 Lg Electronics Inc. Optical disc, method and apparatus for managing a defective area on an optical disc
US8072853B2 (en) 2003-01-27 2011-12-06 Lg Electronics Inc. Optical disc of write once type, method, and apparatus for managing defect information on the optical disc
US7684293B2 (en) 2003-05-09 2010-03-23 Lg Electronics Inc. Write once optical disc, and method and apparatus for recovering disc management information from the write once optical disc
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US7911900B2 (en) 2003-09-08 2011-03-22 Lg Electronics Inc. Write-once optical disc, and method and apparatus for recording management information on the write-once optical disc
US7783829B2 (en) 2003-09-08 2010-08-24 Lg Electronics Inc. Write-once optical disc and method for recording management information thereon
US8296529B2 (en) 2003-09-08 2012-10-23 Lg Electronics Inc. Write-once optical disc and method for recording management information thereon
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