TW402720B - Optical recording medium - Google Patents

Optical recording medium Download PDF

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Publication number
TW402720B
TW402720B TW86111538A TW86111538A TW402720B TW 402720 B TW402720 B TW 402720B TW 86111538 A TW86111538 A TW 86111538A TW 86111538 A TW86111538 A TW 86111538A TW 402720 B TW402720 B TW 402720B
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Taiwan
Prior art keywords
layer
recording medium
optical recording
optical
item
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TW86111538A
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English (en)
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Kyung-Sun Min
Sung-Hoon Kim
Young-Jae Huh
Soo-Hyung Lee
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Samsung Electronics Co Ltd
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/257Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403Layers; Shape, structure or physical properties thereof
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/257Record 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
    • G11B7/2572Record 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
    • G11B7/2575Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242Record 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
    • G11B7/243Record 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
    • G11B2007/24302Metals or metalloids
    • G11B2007/24306Metals or metalloids transition metal elements of groups 3-10
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242Record 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
    • G11B7/243Record 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
    • G11B2007/24302Metals or metalloids
    • G11B2007/24308Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/253Record 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
    • G11B7/2533Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/253Record 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
    • G11B7/2533Record 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
    • G11B7/2534Record 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]
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/254Record 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
    • G11B7/2542Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/258Record 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
    • G11B7/2595Record 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 gold
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/913Material designed to be responsive to temperature, light, moisture
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146Laser beam
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/21Circular sheet or circular blank
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31678Of metal

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

Description

<發明背景〉 斑壓係關於—種光學記錄介質,特別係有關—種可 率的光相答在波長大於_亳微米時具有高反射 管可以質,該光學記錄介質中及從該光學記錄介 與再現^數位多功能影碟機(DVDP)及光碟機(CDP)記 錄 ,個光學記錄介質的記錄單元所記域 區域更r所以光學記錄介質已被以 料的使用。鮮雜介質區分成只有再現已記錄资 次ϋΐϊ憶(R〇M)型,只能記錄一次而可讀數次的寫二 介i^sWC)RM)型和是—種可記錄、可消除和可重寫 ROM^重寫型。光學記錄介質裡所記錄的資料應該是由 朗的齡器舰。_言之,絲記錄= 更二ϊ:Ξ標準化規則(RED Β00κ),所以需要65%或 更大,反射較及47分賊更多_體·嗓纽(C取 反射己錄介質裡,被記錄的資料可以利用 «:,^(Physical ; 變化。同樣地,對於製造可與⑶相容的光& 需要長期資科儲存性質和高記錄密度丄述 同反射率和cnr祕。為了要改良光學記錄介管的特性= 且使製造方法簡化,已經有人提出用久特性並 各種不同光學記錄介質,而且;=== 份已供實際應用。 舟甲^ 經濟部中央標準局員工消費合作社印製 402720 _____ Β7 五、發明説明() 於傳統的光學記錄介質,日本人特許公開專利案昭 和63-268142號揭示一種記錄介質,該記錄介質具有一種 其中用動物膠、白或聚乙烯醇(PVA)形成^錄介質 以及用鉻(Cr),鎳(Ni)或金(Au)依序堆疊在基板上的结 構。根據記錄介質的光學記錄原則,金屬薄膜吸收照射^ 射光的熱,而且因此敏化層以及金屬薄膜變形而形成記^ 凹痕。然而,該記錄介質的記錄凹痕曝光而難以長期儲 所記錄的資料〇 +美國專利第4,983,440號揭示—種記錄介質,該記錄 1貪/、有一五屬溥膜當做§己錄層以及保護記錄層的保護層 依序地堆積在紐上的結構。都,該記錄抑具有大^ 2〇%的非常低反辨而且需要實際使贿_高、功率光 源。而且,記錄介質也不能夠與傳統的CD相容。 據美國專利第5,328,813號,金屬薄膜當做記錄層 形成在基板上,而且在金屬薄膜上形成硬金屬氧化物声以 增加資料儲存性質和反射率至4〇 _ 09%。然而,CNR ^献 很低。 … 入所同樣地,關#難第5,155,723號也揭示—種記錄 2 ’减錄介f具有其巾錢染料層#魏錄層堆積在 t曰上,而且反測層和保護層則堆積在記錄層上。據 ,介質,染料層吸收記錄關雷觀束而放_。而且 而且因熱變形,所以被記錄的訊號可以根據記錄 =射率錄再現4這裡,記錄介韻反射率是鳩或 更大而記錄㈣CNR是47分狀更大,而與CD相容。然 (諳先閲讀背面之注意事項再填寫本頁,) 訂 尺-度適 輕濟部中央榡準局員工增費合作·社印製 _402720 五、發明説明( 而,記錄介質的記錄層具有低耐熱性及抗光性,而且 有機染料昂貴而致㈣成本高。在觀程序翻疼機 染料溶液來進行旋轉塗覆。然而,塗料層的厚度在光學 片製造綱必須IE確地糊在+3%的誤差内,因為反^ 係依塗料層的厚度而定^而且,需要昂錄備但生產力 低0 〈發明之總論>
本發明的一目的即在提供一種光學記錄介質,其在 780nm的波長時有65%或更高的反射率,且可與二壓_碟 片(CD)相容,在63〇〜細麵之反射率為4〇%,以及们分 貝或更高的载體一嗓音比(CNR),且可藉由數位多功= 碟機(DVDP)而再現資料。 t,V 為了達到該目的,係提供一種光學記錄介質,其包括 一具有預刻槽的基板,和一金屬記錄層,_缓衝層射 層依序地堆積在基板上,其中缓衝層係以一具有^6〇〇〜 800nm雷射光束有一低的光吸收度的有機材料所形成,如 此,在650nm的光吸收度(複合折射率(η_κ)的想像部份的 係數Κ)係小於或等於1.0,在780nm的光吸收度則為小 等於0.1。 ; ;" 本發明較佳具體實施例之光學記錄介質結構和特性將 以所附圖式更詳細地説明如下。 <圖式之簡單説明> 本發明上述目的及優點將藉由參考所附圖式以其較佳 具體實施例詳細地描述而變得更顯然易知。 ^父 度適用中國國f標準(CNS ) ΑϋΤ21 ο X 297公釐) (請先閲讀背面之注意事項再填寫本頁)
發明説明( 矛1圖係為顯示本發鈐 的剖面圖; 較佳具骽實施例之光學碟片結榻 第2圖係為顯示第 和非記錄部分的剖面圖;)尤子碟片裡形成之被記錄部会 第3圖係為係顯示反肖 厚度變化的曲線;和 圖之光學碟片的缓衝眉 第4圖係為顯示CNr隨第 化的曲線圖。 弟圖的光學碟片裡記錄功率變 <圖式中符號與名_照〉 ⑺......基板 20......金屬記錄層 30......缓衝層 40反射層 50······保護層 佳具體實例的詳細描述〉 構的發賴健財雜之縣麵介卵 經濟部中央操準局員工消費合作社印 積在基板tl 反射相和—賴層爾序地堆 光學上述結獅絲記錄介質裡,金屬記錄層2〇在 衝層用雷射光束加熱,而熱係轉移職扳10和缓 變i,而Ιίίίί錄層2G加熱區域的基板1()頭膨腺及 衝層30外i錄層酬加顧域藉由絲的擴張力向缓
402720 ----:--- 五、發明説明( 々键{1為#>細顯示本發明之光學記錄介質裡形成之被 錄部分的剖面圖。如第2圖所示,在被記錄 緯:雷射光束而產生熱、基板 彡的程度與金屬記錄層所產生的熱成比例 而且視金屬崎層和_層的材料和厚度而定。 未記__㈣反射率比 率差'“It口此導致已記錄部份與未記錄部份的反射 =,其中反射率使得記錄與回放成為可能。此處,已記 低精的反射率依以τ_理條未記錄部份的反射率為 由於缓衝層厚度的 ;:此亦即,如果基板10由於-記錄雷射而膨脹出丄; S30的ί㈣從記錄以前的厚度減少到記錄以ί的:J 度d2。此處,反射度係依照缓衝層的厚度而改變 3
=口弟3圖所示,如此,已記錄部份的反射度降低。而且广 減少的反射度係決定於金屬層厚度。 I 第二,缓衝層開始厚度dl係為了缓的 化以具有最大的反射度而最佳化。如果薄金屬=斤0= ^吸啟為iliiigH缴面慶_^,,ι;卜.部价的j# pn^ «為心,引起在未記錄部份與記錄竑之間 徑(optical path)的差異。因此,!己錄部份的反射度減少。。 (請先閲讀背面之注意事項再填寫本頁} -訂 經濟部中央標準局員工消費合作社印製 本纸疚尺度適用中國國家標準(CNS ) A4規格(210 X 297公釐) Α7 Β7 五、 經濟部中央標準局員工消費合作社印製 4〇272β 發明説明( 第三,記錄部份的反射度乃由於一從基板的預刻槽反 射之反射光束Rg與一從地侧(land side)反射的反射光Ri之 間的相消干擾(destractive interference)而減少,參考第2 圖,最初的預測刻槽厚度dgi係足夠引起反射光Rg與反射 光Ri之間的相加干擾(contructive interference)。然而,使 用一記錄雷射記錄以後,基板1〇與金屬記錄層2〇係向著缓 衝30膨脹,如此,基板的預刻槽深度乃減少至扭2。結果, 預刻槽的深度減少,藉此於反射光1^與111之間產生相消干 擾。如此,在光的輻照之後,於記錄部份引起了相消干 擾,而減少了反射度,而相加干擾則發生於未記錄的部 份。 為了使用上述現象來獲得一高的CNR,缓衝層的厚度 與材料必需是在最佳狀態的程度。此亦即,藉由吸收雷^ 光束的熱產生現象,作為形成一記錄坑(基板的變形), 王要係反應金屬記錄層。如此,缓衝層係以一種在_ =長下其吸收度低的材料所形成,以減少由緩衡層的埶 產生現象。結果,缓衝層可容易地被變 成 的反射度。 &同 的係飾—複合崎料實際部份 扪職η絲大於或稍π,財記錄 (此處’折射率表示―w 二射’ 本纸張尺度悄_轉( (請先閱讀背面之注意事項再填寫本頁)
A7 B7 分
40272Q —_______ 五、發明説明( 的差係小於或等於8(rc,在吸收的觀點中,較佳的是,用 以作為缓衝層的材料在一 600〜800nm波長的雷射光束下有 二低的吸收度(κ),如此在650nm的光吸收度(K)係小於或 f於1.0 ’而在78〇nm光吸收度(K)係小於或等於0.1。如果 热分解溫度與熔解溫度差超過80Ό,缓衝層即易於熔解而 會使記錄部份地侧受到損傷,因此光學信號的特 壞。 ’ < 以下,將詳細説明依照本發明的光學記錄介質的成 在本發明中,基扳1〇係以一材料所形成,該材 ,射透明’且在8G〜細Μ很容易地膨服並變 ^ 有舰的轉·。可滿足上述航的材料 =·聚碳酸樹脂、聚甲基異丁烯酸酯(ρΜΜΑ) 月曰二聚酯或無定形輯烴,較鋪是,使用—有破^ =广繼的材料,而且,在記錄或重放期間用: 較佳的疋50〜30〇nm。如果預刻槽的深度係小於_ - 記錄後,.反射度即由縣板_脹而大大加^在 即有很多的雜音被包含於一記錄信 如此, 刻槽的深度超過300nm,缓衝# ^娣 ,如果預 了其反射“且 cootmg)獲得一具有平坦表面之緩衝層。 夏法(spm 本發明之光學記錄介質的金屬記 收記錄雷射光束產生_熱產生:及做藉由吸 〆 ^及才疋供目己錄前後對比 :紙痪尺度賴t顧家標準(CNS ) A4規格 (請先閲讀背面之注意事項再填寫本頁j I ! n 「ΊInIHI*n· 經濟部中央標準局員工消費合作社印製 402720
五、發明説明( 金屬記錄層2_學特性中,較佳地, ==V在記錄期間,光吸收較低,如此_ 扪夂忝較小,降低了記錄靈敏度。 f ":r^;:3::AA;! 2則產生的熱量不足1^使“變形一。相 被記錄部分較少變形。而且金屬記錄層 號的_ t 轉性增加而損壞了地侧,其導致了信 反"射率:而且’散佈光的情形增加。因此,難以獲得高 ^佳的是,金屬記錄層的導熱率是4瓦/公分更 =如果金羼記錄層的導熱率超過4瓦/公分。c,則用雷射 難將迅速__圍’所以很 預定的溫度⑼使記錄層加_想要的 人-邱的行跡因為§己錄凹痕的大小增加而可能變形。
1Π 6/ί羼記錄層的熱線性膨脹係數也較佳的相等或高於3 X L 果線性膨服係數小於3 χ㈣。0,則金屬記錄層 =綠時基板變賴致_脹造成破碎,所以不 艮好的記錄訊號值。 為了滿足上述條件,金屬纪錄層可以由 (Ρί),銀(Ag),组(Ta),鐵(Fe)或其合金使用真空沉積 〆. ?SiS^ ( cns )7ίϋ: (210X297公釐) A7 B7 402720 五、發明説明( 法、電子光束或濺散方法形成。 ,依照本發明,缓衝30層有一50〜i,〇〇〇nm的厚度,且 係由於基板10與金屬記錄層的變形而變形。因此,在已變 开y之缓衝與反射層之間的介面形狀乃改變,藉此利用記錄 使反射度㈣變大。於是,通常缓騎係以,—可由於從 金屬記錄層傳送以及其本身直接吸收之光能的熱輕易地變 形的材料所形成。然而,在本發明中,一種在上述6〇〇〜 _有賊長中有—低光錄度的材料乃被使用,來使 缓衝層直吸㈣光能最小化,以達到高反射度。詳细古 之,作為-種缓衝層30的材料,—種能夠滿足下列條件的 有機材料乃被^甩,此亦即:―種在溶劑中具有溶解度為 〇.5g/l_或更高,且對基板不會構賴壞之材料;且敎分 解溫度為_〜3〇代,以便有優異的記錄靈敏度;^;解與 炫解溫度差為8(TC或更小,以使得鍰衝層有好的變形;複 合折射率的實際部份的餘η),在開始狀態係 大於或寺於1.7,以增加記錄信號的對比;與—在細〜 =〇麵下的低光吸收度,以在相⑽波長下有—高反射 以ΗΓ滿足上述條件的有機材料所形成,例如 Γ Ξ 化合物、_化合物、酯化合物、尿 ί二二細匕合物或其混合物。特別是,缓衝 :ΐ ί: 土y—種從包含 i_e)、 (Ph_threne)、花青苷(eyanine)、( 了 (請先閱讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 .:/11---J--訂-------:>------- π 本纸ft尺度適用中國國家標準(CNS ) A4i5:( 210X297^5
A7 B7 經濟部中央標準局員工消費合作,杜印製 402720 五、發明説明() 萘法羅青苷(naphalocyanine)、局部花青苷(merocyanine)、丙 里林(pyrylium)、植物黃質(xanthine)、三苯甲烷 (triphenylmethane)、鉻可寧(croconinm)、偶氮(azo)、競青 (indigoid)、曱川(methine)、甘菊環烴(azulene)、角里林 (squarylium)、硫化物(sulfide)與鯨蠟醇輪酸酯(methal dithiolate)的群中選出的染料。 有機材料可與一聚合物樹脂混合,以增進有關於族轉 被覆之性質,此處,較佳的,聚合物樹脂之含量,以有機 材料作基礎,為50重量百分比或更少,聚合物樹脂可包表 乙烯基醋酸醋樹脂,聚醋樹|旨,聚醚樹脂,聚苯乙缔掛 '脂,聚胺基甲酸乙酯樹脂,纖維素樹脂和脂肪酸樹脂。③ 、在本發明中,缓衝層係以一般用上述材料的方法來形 成’例如,上述的缓衝層的材料溶解於一有機溶劑之中^ 然後所得的溶液乃於金屬記錄層2〇上被旋轉被覆,此處如 果-有機溶劑可容易地溶解缓衝層而不會損傷基 機溶劑即無限制。 , 反射層40係以-通常的方法來形成,例如,反射芦 係以金(Au),銘(A1),銅(Cu),銘(Cr),鍊㈣ ^), 銀(Ag),鉅(Ta),鈦(Ti),鐵(Fe)或其合金以光束或 濺法來形成一厚度為5〇0〜2,5〇〇A之反射層者。〆、 ,保護層50保護光學記錄介質的其他構芦。嫌属 係由一般的方法形成。例如,保護層5获二、〃反目〇 明和可被紫外_化且具有大〃灰轉塗覆透 樹腊,然後用紫外線照射固化經旋轉^覆^ 本紙ft尺度適用中國每^準(CNS )A4規格 (請先閲讀背面之注意事項再填寫本頁j
A7 B7 402720 五、發明説明() 本發明將以下列實施例詳細地描述如下。然而,本發 明不為下列實施例所限。 將鎳(Ni)記錄層真空沉積在聚碳酸酯基扳上至 4笔祕米厚’該基板厚丨·2毫米,有預刻槽,其深度為190毫 如丈米,其最上方處寬0.8微米,其底部寬0 22微米,而軌跡 間距1.6微米。然後,將溶解0 85克熱分解溫度為2〇(rc, 少谷解溫度為24〇〇C的(CVS-300, ICI,ϋ·Κ.,吸收度在780nm 為Ο/在65〇nm為0.43)紅色染料於1〇毫升二丙酮醇(DAA) 而待的塗料溶液以4,〇〇〇 rpm旋轉塗覆在Nit錄層形成緩衝 層:在此,相當於預刻槽侧利用掃描式電子顯微鏡(SEM) 測得的缓衝層厚度為大约28〇毫微米。在4〇Ό真空箱裡乾 燥所得的結構之後,將Au錢沉積至大約4,_人以形成反 ^層。然後,將可用料__環氧基_咖旨樹腊旋 轉塗覆在反射壯,難目化形絲韻,產生本發 片型光學記錄介質。 =,用^⑶娜試器(〇Hmt_5⑼,々ex)採用· f朱雷.射光束續評储果, 2Γ,而最大反射率Rtop是㈣而使用 ,在使财毫瓦記錄功率、.千赫調幅以 =,:是65分貝。在上述記錄條件= 的記錄訊號係以毫瓦或更大的記錄功率再 先鋒)記錄料顧之後,被記錄轉音訊雜用cd唱 (讀先閲讀背面之注意事項再填寫本頁) 訂. 經濟部中央標準局—工消費合作社印裝 本紙狀度適用"^囷家標準(CNS) A4規 km 經濟部中央標準局'貝工消費合作社印製 402ϊ2δ
五、發明説明( 盤(Mark II,飛利浦、旦目 De油興咖公司根據⑽-CATS (瑞典緣 皆滿足⑽標i =碟^錄特性,評估過的所有項目 (DVDP)再1。 貧料能夠由數位多功能影碟機 實施例2 站施例1相同方法製造碟片型光學記錄介質,不同 層材料被6亳微米厚的CuA1取代、並評估碟 片的功效。 ^ 記錄麵反鱗是观,破大反神Rt〇P是62%, 而且,波長請亳微米時的碟片反射率是51%。而且,於 碟片中。己錄|首訊號以號,碟片裡記錄的資料能夠 位多功能影碟機(DVDP)與CDP再現。 實施例3 碟片係以如實施例1所述的相同方法製造,除了金 屬記錄層是以厚度5毫米的鉅取代,再評估葉片的特性。 依照特性評估的結果,記錄前的反射率為76%,最大 反射率Rtop為65%,而(:皿為62分貝,波長65〇毫微米^的 碟片反射率為53 %,使用CD-R記錄器於碟片中記錄一聲音 信號’以後,記錄的聲音信號,可使用一CDP與dVdp^_ 現0 實施例4 一碟片係以如實施例1所述的相同方法製造,除了反射 層的材料係以10毫微米厚的A1所取代,再評估碟片的特 請 先 閲 t 事 項 再%, 本; 買
H 14 本纸疚尺度適用中國國家標準(.CNS ) A4規格(210X297公釐 經濟部中央標準局員工消費合作•钍印製 402!72〇 A7 ' -------- B7 __ 五、發明説明() 性。 依照特性評估的結果,記錄前的反射率為77%,最大 反射率Rt〇p為65%,而CNR為62分貝,波長650毫微米時 的碟片反射率為51%,使用CD-R記錄器於碟片中記錄一聲 晉信號以後,記錄的聲信號,可使用一 CDP與DVDP再 現。 —碟片係以如實施例1所述的相同方法製造,除了以 分解0.9¾ NK-1532(日本製光敏性染料)與〇,〇58L_04(日本 製光敏性染料)於10毫升=丙酮醇(DAA)中而得的溶液係用 來形成一缓衝層,在缓衝層的溶液中,在780nm時的折射 率n與吸收度(K)分別為i.85與〇·〇24,在65〇11111睁則分別 2.與〇.〇3。在記錄一音樂以後,記錄的音樂可藉一 CDp 與dvdp再現,在780ηιη時最大的反射率Rtop為66%,在 65〇nm的反射率為43%。 一碟片係以如實施例所述的相同方法製造,除了缓衝 層之材.料係.以〇.85g的青藍染料(〇7811丨116(1;^)8-〇4(NniPij0n Kank〇 Shildso Kenkusho Co., Ltd.)取代,該 染料在780nm時的折射率n為2·5,吸收度(K)為0,在 650nm時的折射率η為1.49,吸收度(Κ)為1.41,然後,進 行其特性評估,此處,缓衝層對應預刻槽部份的厚度,以 一掃描式電子顯微鏡(SEM)測量,係大約300nm。 依照特性評估的結果,記錄前的反射率為78%,最大 -------—______ 本紙痪尺皮適用中國國家標準(CNS)六4規格(210X297公釐) (諳先閱讀背面之注意事項再填寫本頁)
經濟部中央標準局員工消費合作社印製 402720 at ___ B7 五、發明説明() 反射率Rtop為66%,而CNR為65分貝。而且,在碟片使用 CD-R記錄器(rpD_1000,先鋒)記錄聲音信號以後,記錄 的聲信號不能使用CD唱盤(Mark II,飛利浦)重現,依照碟 片的記錄特性,以一CD-CATS評估,所有評估的項目均'能 滿足CD的標準,然而,在650nm的反射率為20%,因此無 法以DVDP重現。 达較實施例2 一碟片係以實施例1的相同方法製得,除了缓衝層的 材料係以 0.80g T-043 染料(Nippon Kayaku Co” Ltd.)取 代,該染料有一215°C的熱分解溫度與125¾的熔解溫度, 然後進行其特性評估。 依照特性評估的結果,記綠前的反射率為79%,最大 反射率Rt〇P為65%,而CNR為45分貝。而且,在碟片使用 CD-R記錄器(RPD-100,先鋒)記錄聲音信號以後,記錄的 聲彳§號不能使用CD唱盤(Mank II,飛利浦)重現。依照使 用在實施例1之評估設備所作評估的結果,一個地測(land side)係嚴重地變形。 比較實施例3 將4.4克N,N‘-2, 5-環己二烯基-1, 4-基辞雙[4-(二丁 基胺基)七-[4_(二丁基胺基)苯基]-雙[(ocm)·六氟-銻 酸酉旨(10)](NK-3219,Nippon Kanko Shinko Kenkusho有 限公司’ λ max = 720毫微米,在780nm的折射率n為2.28, 吸收度(Κ)在780nm為0.〇24,在65〇nm的折射率η為1.18,.吸 收度(Κ)為L31)溶解在1〇〇毫升DAA裡所得的染料溶液沉積 ------Ifi 本紙張尺度適用中國國家標準(CNS ) Λ4規格(21 OX 29*7公釐) (讀先閱讀背面之注意事項再填寫本頁.)
402720 A7 B7 五、發明説明( 在聚碳酸®θ (PC)的基板上i〇2mm厚,其並有i53nm的予苜列 槽,其最上部份之寬為〇.8/zm,底部之寬為〇 8_,^ 跡間為1.6//m,其係使用旋轉被塗覆機依序地以咒轉/分鐘 塗覆5秒、1,500轉/分鐘15秒和4,〇〇〇轉/分鐘3〇秒的方式 進行,然後完全乾燥。然後,使用濺射機形成Au反射層至 厚度100毫微米。在將UV可固化樹脂沉積在Au反射層上 之後’雜機結馳#uv目似彡成厚職米的保護層。ίϊΐϊ率Rt°p是66%,而使用G.7毫瓦雷射在使用8毫瓦 CNR % 千赫滴幅以1,3米/秒記綠速度記錄碟片的疋为、a。然而,碟片不仍能夠由DVDP播放。 ,上所述’本發明的光學記錄 卑,r資料由於其在_毫:;長 請 先 閱 讀 意 事 項 再 養 $ 訂 經濟部中央標準局員工消費合作社印製 dr 尺 一縣
S N I格 規 公

Claims (1)

  1. 402720 A8 B8 C8 D8 六、申請專利範圍 輕濟部中夬榡準局員-X.消費合作祍印裂 1. 一種光學§己錄介質,其包括 ——具有預刻槽的基扳,和 -金屬記錄層,缓_和反制依序地軸在基板上, 其中缓衡層係-具有對_〜8〇〇nm的雷射光束有一低的 光吸收度的、«材料所軸,如此,在㈣_的光吸收 度(K)係小於或等於10,在78〇nm的光吸收度係小於或 等於0.1。 、 2. 如申請專利顧第1項之光學記錄介質,其巾缓衝層之有 機材料之熱分解溫度為100〜30(rc。 3. 如申請專·_2項之料記餐質,射熱分解溫度 與嫁解溫度之差係少於或等於。 4. 如申請專利範圍第i項之光學記錄介質,其中缓衝層之有 機材料的折射率(複合折射率的實際部份的係數η)係大於 或等於1.7 〇 、 5. 如^請專繼i丨第1項之光學記錄介質,其巾有機材料包 栝芳香族化合物、脂肪族化合物、醯胺化合物、酯化合 物、尿素、联、缻化合物、羥基化合物或其混合物。 6. 如申請專利範圍第5項之光學記錄介質,其中有機材料係 以從包含悤她bnthraquinone}、二噁喊沖⑽拉㈣、三驗 一嗔嗓{triphenodithiazine}、菲{phenanthrene}、花青苷 (cyanine)、敢青(phthal〇cyanine)、萘法羅青苦 (naPhthal〇cyanine)、局部花青苷(mer〇cyanine)、丙里林 (pyrylium)、植物黃質(xanthine)、三苯甲烷 (triphenylmethane)、銘可寧(croconinm)、偶氮(az〇)、錠青 請 ka 閱 面 之 注 意 再 ¥ 頁 訂 18 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公瘦 402720 A8 B8 C8- D8 經濟部中央標準局員工消費合作社印製 六、申請專利範圍 (mdlg〇ld)、甲川(methine)、甘菊環烴(azuiene)、角里林 (squarylmm)、硫化物(sulfide)與鯨蠟醇錄酯㈣制 dithiolate)的群中選出的染料。 7·如申請翻範第1項之光學記錄介質,其巾缓衝層包 括以有機材料為基礎,5〇重量百分比或更少的聚合物。 8. 如申清專利典園第7項之光學記綠介質,其中聚合物包括 從包含乙烯基醋酸酯樹脂,聚酯樹脂,聚醚樹脂,聚苯 乙烯樹脂,聚胺基曱酸乙_脂,纖維素樹脂和脂肪酸· 樹脂的群中選出的至少一種者。 9. 如申請_範圍第1項之光學記錄介f,其巾缓衝層之厚 度為50〜l,000nm 〇 10. 如申請專利範圍第丨項之光學記錄介質,其中。一保護 層係形成在反射層之上。 ^ 第1項之光學記錄介質,其巾光學記錄 ;丨八在600〜8〇〇nm時反射度為40%。 .12.如申請專利範圍第丨項之光學記錄介質, 左 板上之預刻槽深度為50〜300nm。 V ,土 第1項之光學記錄介質,其中至少基板、金 屬圮錄層與缓衝層之—者具有一變形部份。 申請相第13項之光學鱗介質,其巾紐斑金屬記 減形部份,缓衝層對應變形部份的部份則有二 Π·如申請#利和項之光學記齡質,其巾 錄層與缓衝層具有彼此對應的變形部份5 *~—-—— 19 ⑭ CNS) A4^ (2iQx297 公楚
    、申請專利範圍 40272G 16·如申請專利第15項之光學記錄讀,其巾反射芦且右— 對應著缓衡賴_部份㈣形部份。、 Ί— 奴解鱗㈣,射衫記錄層之 认如申財·1項之光學讀輕,財滅記錄層包 含一金屬,其具有—大於或等於_之複合折射率的想 像部份的係數K者。 I9.如申請專利第18項之光學記錄介質,其中金屬記錄層包 括選自一群包括金(Au),鋁(A1),鉻(Cr),鈦(Ti),銅 (Cu),鎳(Ni),鉑(Pt),銀(Ag),鉅(Ta),鐵(Fe)或其合 金的金屬者。 請 先 閔 讀 背 ι5 之 注 拳 項 再 !· 頁 訂 .——線I Π 經濟部中央標隼局員工消費合作社印製 適 I度 尺 張 一紙 f準 !榡 I家 公
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CN1180224A (zh) 1998-04-29
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US5955168A (en) 1999-09-21
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