TWI278845B - Optical recording medium, and record regeneration method and record regeneration device - Google Patents
Optical recording medium, and record regeneration method and record regeneration device Download PDFInfo
- Publication number
- TWI278845B TWI278845B TW093107976A TW93107976A TWI278845B TW I278845 B TWI278845 B TW I278845B TW 093107976 A TW093107976 A TW 093107976A TW 93107976 A TW93107976 A TW 93107976A TW I278845 B TWI278845 B TW I278845B
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- TW
- Taiwan
- Prior art keywords
- recording
- shortest
- pulse
- light
- recording medium
- Prior art date
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Classifications
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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
- 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
- G11B7/244—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 organic materials only
- G11B7/246—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 organic materials only containing dyes
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- 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
- G11B7/00456—Recording strategies, e.g. pulse sequences
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- 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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24082—Meandering
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- 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
- G11B7/244—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 organic materials only
- G11B7/245—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 organic materials only containing a polymeric component
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- 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
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- G11B7/244—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 organic materials only
- G11B7/246—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 organic materials only containing dyes
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- 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
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- 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
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- 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
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- 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
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
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- 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
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- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
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1278845 (1) 玖、發明說明 【發明所屬之技術領域】 本發明係有關於使用色素系追錄型DVD媒體之記錄 再生方法及記錄再生裝置,以及光記錄媒體。 【先前技術】 目前,作爲新世代大容量光碟的DVD - R之開發正在 推進當中。爲提升記錄容量,要項技術的爲記錄位元坑之 微小化的記錄材料之開發,以 Moving Picture Experts Group-2 ( MPEG 2 )爲代表之影像壓縮技術之採用,記錄 坑讀取用半導體雷射之短波長化等技術的開發已屬必要。 目前爲止,紅色波長範圍之半導體雷射,僅有條碼讀 取機、儀器用之6 70奈米一帶之AlGalnP雷射二極體的商 業化,而隨光碟之高密度化,紅色雷射已逐步正式使用在 光儲存市場。DVD機者,其光源已有63 0至690奈米一 帶之半導體雷射波長的規格化。另一方面,再生專用之 DVD - ROM機係以約650奈米波長商業化。 一般,以加熱模式形成坑(紋路)之色素系追錄型 DVD媒體,特定記錄速度下記錄時雷射光的記錄脈衝列 之脈寬及記錄功率已最適化,不同記錄線速下形成之紋路 、間隔之狀態起變化。亦即,紋路之形成所需的最前加熱 脈衝的熱容量不足,相對於最適分解溫度,所達加熱溫度 不同而紋路之平均長度變異,最適加熱脈衝之負載比不同 ,不得均勻之紋路寬度,沿紋路長度有粗細變化,故顫動 -5- (2) 1278845 特性惡化。 又,關於DVD系媒體之物理格式,DVD- R媒體之 格式者,已有稱作坑前平坦部的平坦部之一部份經刻畫的 格式之規格化。採取該方式,則坑前平坦部信號(Lppb )不及0.16時坑前位址等坑前資訊無法良好再生,超出 0.3 2則LPP信號本身於資料區域盡成雜訊,大量產生資 料錯誤。因此,LPP須以壓模配合記錄材料微調刻毚寬度 ’ L P P b則須控制平坦部刻畫寬度於〇 · 1 6至0 · 3 2之範圍。 上述使用色素於記錄層之光記錄媒體有例如,使用聚 次甲基色素或聚次甲基色素及光安定劑作爲記錄材料者( 參考專利文獻1 ),以四吖紫質色素用作記錄材料者(參 考專利文獻2 ),以菁色素及偶氮金屬螯合物色素(鹽形 成色素)用作gg錄材料者(參考專利文獻3),以偶氮金 屬蜜合物色素用作記錄材料者(參考專利文獻4、5), 以甲腊金屬螯合物色素用作記錄材料者(參考專利文獻6 )’以亞甲二吡咯金屬螯合物色素用作記錄材料者(參考 專利文獻7) ’以史克亞(Squaryiiurn)金屬螯合物色素 用作S3錄材料者(參考專利文獻8 )等。並知多有以色素 用作記錄材料作多脈衝記錄者(參考專利文獻9及丨〇 ) 。但未見有對於色素系追錄型DVD媒體以脈衝作記錄, 並著眼於高線速記錄之際與記錄波形的關係者之揭示。 因此現況係,於色素系追錄型DVD媒體,爲得良好 之記錄波形’並可作高線速記錄之記錄再生方法及記錄再 生裝置之開發受到期待。 -6- (3)1278845 (專利文獻1 ) 日本專利特開平1 0 — 1 8 1 2 1 1號公
(專利文獻2 ) (專利文獻3 ) (專利文獻4 ) (專利文獻5 ) (專利文獻6) (專利文獻7 ) (專利文獻8 ) (專利文獻9 ) (專利文獻1 〇 )
特開2002 - 28 3 72 ]號公報 國際公開第98/02925 7號小冊 特開2 0 0 0 — 1 2 7 6 2 5號公報 特開平1 1 一 3 1 072 8號公報 特開200 1 — 02323 5號公報 特開平1 0 - 226 1 72號公報 特開2002 — 3 7 045 1號公報 特開2000— 182244號公報 特開2000- 207742號公報 【發明內容】 本發明之目的在提供,對於色素系追錄型DVD媒體 實施高線速記錄之際,可得良好記錄波形之記錄再生方法 及記錄再生裝置。 本發明之目的在提供,使用震盪波長比CD系媒體短 之半導體雷射,可與DVD - R坑前,平坦部方式同樣使資 料加寫部之未記錄區域消失,相較於DVD - R坑前平坦部 方式製作壓模時之微細刻畫寬度控制、LPP信號之往資料 部洩出所致資料錯誤不會發生,採用追錄型DVD系統之 新格式方式高頻顫動格式方式之色素系追錄型DVD媒體 用以解決上述課題之手段如下。 -7- (4) 1278845 <1>其特徵爲:具有設定高頻顫動之導溝的基板上至 少有含有機色素之記錄層之光記錄媒體,對於其記錄層’ 利用最短紋路以外之各紋路加熱脈衝的最前部及後端部二 處於一定時間高輸出化,且該加熱脈衝最前部脈衝光功率 大於後端部脈衝光功率之一脈衝光記錄,以再生光再生該 記錄之記錄再生方法。該<1>之記錄再生方法中,因使用 最短紋路以外之各紋路,加熱脈衝最前部及後端部二處係 於一定時間高輸出化,且該加熱脈衝最前部之脈衝光功率 大於後端部脈衝光功率之一脈衝光記錄,可形成最適脈衝 照射形式,相對於色素系追錄型DVD媒體,任何線速下 皆可低抖動、低錯誤率作記錄,可比用於DVD — R之坑前 平坦部格式更簡便製造之高頻顫動格式高效率實施資料部 之加寫。並且,對於與目前大量製造之CD — R、CD — RW 大致相同格式之色素系追錄型DVD媒體(例如,DVD + R )亦可進行記錄。 <2>記錄紋路之際,使所有紋路的脈衝後端部以後之 冷卻脈衝之照射光量於一定時間在 0.1毫瓦以下之上述 <1>之記錄再生方法。該<2>之記錄再生方法中,上述<1> 之紋路記錄時脈衝後端部以後之冷卻脈衝的照射光量之加 以規定,對於色素系追錄型DVD媒體實施高線速記錄之 際’可得良好之記錄波形。 <3 >使最短的紋路之脈衝光功率,與該最短紋路以外 之紋路的脈衝最前部高輸出化之脈衝光功率相等的上述 <1>或<2>中任一之記錄再生方法。該<3>之記錄再生方法 (5) 1278845 中,形成各紋路之際以追加功率之高輸出化記錄功率(脈 衝光功率)可分配最適化功率以免對記錄再生裝置施加過 度負荷,對於色素系追錄型DVD媒體實施高線速記錄之 際,可得良好之記錄波形。 <4>使脈衝後端部以後之冷卻脈衝照射光量在〇.1毫 瓦以下之時間,係最短間隔的1/6至6/6長度之上述<1> 至<3>中任一的記錄再生方法。該<4>之記錄再生方法係 ’設於脈衝後端部以後之冷卻脈衝的較佳條件加以規定者 ,使脈衝後端部以後之冷卻脈衝的照射光量在〇. 1毫瓦以 下之時間爲最短間隔的1/6至6/6之長度,即可在對於色 素系追錄型DVD媒體(例如DVD + R )實施高線速記錄之 際,獲得良好之記錄波形。 <5>前一間隔長度係最短之紋路的形成之記錄脈衝列 最前部加熱脈衝寬度,依該紋路長度是否最短加以區別, 將最短紋路之最前部加熱脈寬設定爲長於非最短紋路之最 前部加熱脈寬,並且將形成最短紋路之記錄脈衝列之最前 加熱脈寬,依該最短紋路之前一間隔長度是否最短作區別 ,將前一間隔長度係最短之紋路的最前加熱脈寬,設定爲 短於前一間隔長度係最短之紋路的最前加熱脈寬的上述 <1>至<4>中任一之記錄再生方法。 <6>高頻顫動係,以基本時鐘週期爲τ則頻率爲4T 至96T之上述<1>至5>中任一的記錄再生方法。 <7>高頻顫動之振幅(Wo ),與用來控制以二分光探 測器探測軌跡錯誤之軌跡錯誤探測信號的推拉振幅(p p ) - 9- (6) 1278845 之比(Wo/PP )係同步配合至0.1 $ Wo/PP S 0·4的上述 <1>至<6>中任一之記錄再生方法。 <8>記錄光之波長係600至720奈米的上述<1>至<7> 中任一之記錄再生方法。 <9>對於記錄光及再生光之波長±5奈米之波長範圍 的光,上述記錄層單層之折射率η係1.5SnS3.G’且衰 減係數k爲0.02SkS0.2的上述<1>至<8>中任一之記錄 再生方法。 φ <1〇>光記錄媒體係色素系追錄型DVD媒體之上述 <1>至<9>中任一之記錄再生方法。 <11>其特徵爲:使用於上述<1>至<10>中任一之記錄 _ 再生方法的光記錄媒體。 · <12>有具設定高頻顫動之導溝的基板,及於該基板上 至少有反射層、含有機色素之記錄層、保護層、粘合層以 及保護基板的上述<11>之光記錄媒體。 <13>反射層含選自金、金合金、銀、銀合金、銘及鋁 g 合金之至少一種的上述<1 1>或<12>之光記錄媒體。 <14>保護層含紫外線硬化樹脂的上述<1〇>至<12>中 任一之光記錄媒體。 <15>爲製成貼合二片基板的雙面構造之光記錄媒體, 黏合層設於該二片基板間,且用於該黏合層之黏合劑係紫 外線硬化樹脂的<10>至<14>中任一之光記錄媒體。 <16>係追錄型光記錄媒體之上述中任一 之光記錄媒體。 -10- (7) 1278845 <17>用於 DVD—R及 DVD + R之任一的上述<10>至 <15>中任一之光記錄媒體。 <18>其特徵爲:具有對於有設定高頻顫動之導溝的基 板上至少有含有機色素之記錄層而成之光記錄媒體的記錄 層’以使最短紋路以外之各紋路,加熱脈衝之最前部及後 端部二處於一定時間高輸出,且該加熱脈衝之最前部脈衝 光功率大於後端部脈衝光功率之一脈衝光進行記錄的記錄 機構之記錄再生裝置。 <19>記錄機構係,記錄紋路之際,使所有紋路的脈衝 後端部以後之冷卻脈衝之照射光量爲一定時間0.1毫瓦以 下之機構的上述<18>之記錄再生裝置。 <2 0:>具有使最短紋路之脈衝光功率與該最短紋路以外 之紋路的脈衝最前部經高輸出化之脈衝光功率相等之機構 的上述<18>或<19>之記錄再生裝置。 <2 1 >具有使脈衝後端部以後之冷卻脈衝照射光量在 〇·〗毫瓦以下之時間,爲最短間隔的1/6至6/6長度之機 構的上述<18>至<20>中任一之記錄再生裝置。 <2 2>具有形成前一間隔長度係最短之紋路的記錄脈衝 列之最前加熱脈寬,以該紋路長度是否爲最短加以區別, 設定最短紋路之最前加熱脈寬長於非最短紋路之最前加熱 脈寬,並且,形成最短紋路之記錄脈衝列之最前加熱脈寬 ’以該最短紋路之前一間隔長度是否最短作區別,將前一 間隔長度係最短之紋路的最前加熱脈寬,設定爲短於前一 間隔長度非最短之紋路的最前加熱脈寬之機構的上述< 1 8> -11 * (8) 1278845 至<2 1>中任一之記錄再生裝置。 <23>光記錄媒體係色素系追錄型DVD媒體之上述 <18>至<22>中任一的記錄再生裝置。 【實施方式】 (記錄再生方法) 本發明之記錄再生方法係,具有設定高頻顫動之導溝 的基板上至少有含有機色素之記錄層而成之光記錄媒體, 對於其記錄層,用使最短紋路以外之各紋路,加熱脈衝之 最前部及後端部二處於一定時間高輸出化,且該加熱脈衝 之最前部脈衝光功率大於後端部脈衝光功率之一脈衝光進 行記錄,以再生光再生該記錄。 此時,記錄紋路之際,以使所有紋路的脈衝後端部以 後之冷卻脈衝之照射光量爲一定時間0.1毫瓦以下爲佳。 又,使上述最短紋路之脈衝光功率,與該可最短紋路 以外之紋路的最前部經高輸出化之脈衝光功率相等,可係 形成各紋路之際以追加功率而高輸出化之記錄功率(脈衝 光功率)使記錄再生裝置免遭過度負荷之施加的最適功率 分配。 又,脈衝後端部以後之冷卻脈衝照射光量在0· 1毫瓦 以下之時間,係以最短間隔的1 /6至6/6之長度爲佳。超 出該範圍則難得本發明之效果。 又’以形成前一間隔長度係最短之紋路的記錄脈衝列 之最前加熱脈寬,依該紋路長度是否最短作區別,設定最 -12 - 1278845 Ο) 短紋路之最前加熱脈寬爲長於非最短紋路之最前加熱脈寬 ’並且,形成最短紋路之記錄脈衝列之最前加熱脈寬,以 該最短紋路之前一間隔長度是否最短作區別,將前一間隔 長度係最短之紋路的最前加熱脈寬,設定爲短於前一間隔 長非最短之紋路的最前加熱脈寬爲佳。 本發明中最短紋路以外之各紋路,脈衝最前部及後端 部之追加功率高輸出化之長度,以基本時鐘週期T的1 /2 至2倍,亦即,〇·5τ至2T爲尤佳,但亦可於〇·2Τ至 2.5 T之範圍實施。又最短紋路之單純脈衝之光量,於波 形控制上,係以約略等於最短紋路以外之各紋路的最前部 追加光量爲佳,但若係在波形產生電路上可產生之範圍, 則亦可不相等。追加功率之比率係,以最短紋路之脈衝光 功率及最短紋路以外之各紋路的最前部追加脈衝光功率爲 W0 ’最短紋路以外各紋路之後端部的追加脈衝光功率爲 W1,中間部之未追加脈衝光功率爲 W2,則 W0/W2及 W1/W2 在 1.05 至 3.00,以 1·08 至 2.00 爲佳,且 W0>W1 〇 選擇如此範圍內之脈衝記錄波形,尤以高線速記錄當 中,低抖動之良好記錄成爲可能。 上述色素系光I己錄媒體右欲貫現闻線速化則記錄功率 非大不可,結果紋路間更易於起熱干涉。因而,形成紋路 之際爲使紋路邊緣切削良好,本發明即有效。.. 向來之直接進行記錄者,可得最低抖動之功率及錯誤 最少的功率發生偏移’功率邊距縮小。具體而言,高線速 ^ 13- (10) 1278845 記錄當中可得最低抖動之記錄功率出現記錄信號之非對稱 性偏向負側’錯誤測定時無論是如何之低抖動仍易有錯誤 出現。例如,非對稱性係負者,雖係低抖動、低錯誤,因 光記錄媒體、驅動機之歷年變化等,非對稱性在零附近所 記錄之媒體仍易有錯誤出現。
又,一紋路以多數之脈衝光(多脈衝)寫入時,若將 脈衝光最適化,上述之低非對稱性問題亦可解決,而因使 用多數之脈衝光,脈衝光之開關時間產生變異時記錄品質 H 本身亦有變異之可能。該變異在高線速記錄愈容易發生。 相對於此,本發明因係每一紋路以一脈衝光記錄,具 有可提供記錄品質變異小於該多脈衝光記錄之記錄方法的 優點。又,寫入中之位址之探測,較之多脈衝法因係單純 之記錄波形,記錄時之光量容易平均化,不只間隔部之反 射光量,紋路部之光量亦平均化,位址探測變爲可能,於 脈衝後端設〇· 1毫瓦以下之冷卻脈衝亦具有位址探測能比 較容易實施之優點。 · 在此,第4至7圖示本發明的該記錄波形之一例。此 時,僅最短紋路係單純矩形波,最短紋路以外之紋路的參 數可選擇大致共通之參數,有易於往已實用化的驅動機展 開之優點,隨記錄媒體以簡化之記錄波形謀求良好之抖動 時,高速記錄中,記錄紋路長度爲4T (其中T表基本時 鐘週期)時,中間低功率部之開關精度須予提高,僅只該 4T部份於往驅動機之展開有負荷之施加。 又,考慮熱千涉之影響,形成前一間隔長度係最短之 >14- (11) 1278845 紋路的記錄脈衝列之最前加熱脈寬,依該紋路是否最短作 區別’設定最短紋路之最前加熱脈寬爲長於非最短紋路之 最前加熱脈寬,並且形成最短紋路之記錄脈衝列的最前加 熱脈寬,依該最短紋路之前一間隔長度是否最短作區別, 將前一間隔長度係最短之紋路的最前加熱脈寬,設定爲短 於前一間隔長度係最短之紋路的最前加熱脈寬,即可實現 更低抖動之記錄。 上述最前加熱脈寬從短設定之尤佳修正量(長度)係 0.02T至0.10T (其中T表基本時鐘週期)之範圍。形成 之紋路的前一間隔長度係最短時,形成該紋路之脈衝列的 最前脈寬若大致等於其它紋路者,則因熱干涉而該前一間 隔長度縮短,抖動有些惡化。因而僅於此時縮短用以記錄 紋路之最前加熱脈寬會有效果。脈寬欲更予縮短時最前加 熱脈衝之前緣的縮短即有效自不待言。 又,形成之紋路的前一間隔長度係最短時,若形成該 紋路之脈衝列的最前加熱脈寬短於0 · 1 0 T,則紋路長度本 身過短而不佳。 將上述最短紋路之最前加熱脈寬設定爲長於其它紋路 之際的修正量(長度)以0.05T至0.25T爲佳。尤以記錄 線速加大則最短紋路難以形成,故於上述範圍作修正,加 長最短紋路之最前脈寬。 上述最前加熱脈寬之修正量的具體例列於表1。 (12) 1278845 表1 記錄紋路長度 3 丁 4Τ〜14丁 前 3 丁 ±0·00Τ 一 0.05Τ 一 4T 間 S 隔 1 4T + 0.05Τ ±0·00Τ 長 度
其次列舉上述光記錄媒體之記錄層的必要光學特性項 g。 上述光學特性較佳者爲,對於記錄再生波長附近之長 波長附近的波長範圍之光,亦即,記錄光及再生光之波長 ±5奈米波長範圍之光,記錄層單層之折射率n在1·5^η $3.0,衰減係數k在0.02Sk$0.2之範圍。η不及1.5時 難得充分之光學變化,會有記錄調變度之下降,若超出 3.0則波長依賴性過高,即使在記錄再生波長範圍仍會成 爲錯誤。又,若k不及0.02則會有記錄靈敏度之惡化, 若超出〇·2則會難得50%以上之反射率。 而DVD再生專用機已規格化於65 0奈米附近,但光 記錄媒體之記錄光的波長係規格化於製作專用媒體之63 5 奈米,其它一般用途者係規格化於65 0至660奈米。然而 這些波長至多係中心波長,因雷射二極化(LD )之製造 -16- (13) 1278845 的變異而於短波長側、長波長側震盪。且LD於其特性上 ,一般若溫度上升則波長偏移往長波長側。本發明係可用 含上述波長範圍之600至720奈米的記錄波長實施之方法 〇 其次說明設於基板而蛇行之導溝的顫動特性,用以界 定顫動頻率之T係基本時鐘週期,於DVD (4.7十億字元 )媒體係約0.133微米,時間則係約38奈秒。 通常顫動頻帶係用相當於15 0T至400T (其中T表基 本時鐘週期)者,而該頻帶於加寫調頻、相位調變資料時 ,顫動頻率過低,前資料與加寫資料之間極爲空曠不利於 高密度記錄。相對於此,DVD - R設有LPP,以該LPP信 號控制資料之寫入位置。 然而,上述LPP方式下若LPP之信號振幅過小則 LPP無法良好讀出,反之若LPP過大則下次LPP信號本 身洩進寫入資料,發生多起資料錯誤之缺失。因此,上述 LPP方式中,設限於0.16$LPPbS0.32,較佳者爲0.18S LPPbS 0.26,製作壓模之際,平坦部之刻畫寬度須予微細 控制。 相對於此,以高頻顫動方式即不必LPP,因同步作顫 動之調變,不致於會有如同LPP方式之多起資料錯誤之 情事。此時,上述高頻顫動頻率以4T至96T爲佳。其一 方面,若超出4T,則頻率過高難以探測,於旋轉控制、 位址偵測可靠度上亦有問題。另一方面,若大於96T則頻 率過低,追錄資料之際其次的間隔拉不開,會發生容量下 ‘17- (14) 1278845 降、資料處理速率下降之問題。 本發明對象之DVD媒體的顫動振幅若滿足’通過例 如4百萬赫、3 0千赫之高、低通濾波器之信號的顫動振 幅(W 〇 ),與通過適當之濾波器,例如3 0千赫之濾波器 之推拉信號(PP)之比(wo/pp)係 0.lSW〇/PPS0.4, 本發明目的之與顫動同步配合即容易達到,較佳者爲, 0.15SWO/PPS0.30。上述Wo/PP値若不及〇.1則信號強 度不足以獲致同步,超出〇·4則有資料部錯誤增多之傾向 。但是,於LPP方式作比較,LPP大之媒體,隨對於發生 資料錯誤之影響小的顫動振幅之增加,資料錯誤減緩。 又,製作壓模之際,爲使上述LPP方式之LPP刻畫 寬度在上述0.16至0.32之範圍內須有高度之刻畫寬度控 制技術,本發明的高頻顫動方式中,高頻產生源及顫動振 幅大小(以顫動振幅控制電路可於高再現性下得任意振幅 )亦予管制,目的即可達到,故壓模之良率、媒體之良率 可大幅提升。 上述格式之基板,使用有機色素以溶劑塗敷法形成記 錄層者之例中,溝深以1000至2500埃(100至250奈米 )爲佳,1500至2000埃(150至200奈米)更佳。上述 溝深不及1 000埃時,推拉信號之充分取得、追縱控制會 無法達成,若超出2500埃則於基板成形之際會有轉印性 之惡化。 設置上述色素記錄層時,以顫動頻率爲mT (其中m 表自然數),以色素溝深爲dl,則色素溝深以I 20 0 S dl (15) 1278845 x m S 1 6 Ο Ο Ο 0爲佳。上述d 1 x m低於1 2 Ο 0則不得充分之 差異信號,記錄再生時會無法作充分之追蹤,超出 1 6 0 0 0 〇則反之因振盪而不適於追縱,並係起因於前敘基 板成形之際的轉印極限之基板溝深極限,實質上無法高於 160000 ° 又,爲確保記錄密度4至5 0億字元之容量,軌距以 b. 64至0.8微米爲佳。溝寬隨記錄材料而異,而於幾乎所 有的有機材料,可採用半値寬0.18至0.40微米之範圍。 (光記錄媒體) 本發明之光記錄媒體係包括,具有用於上述本發明的 記錄再生方法之設定高頻顫動之導溝的基板,及該基板上 之至少的反射層、含有機色素之記錄層、保護層、粘合層 以及保護基板而成,必要時可更有底塗層、硬塗層等其它 層。 在此,第1A至1D圖係一般追錄型光碟之層構造的 一例。第2八至2C圖係一般CD — R媒體之層構造的一例 。本發明對象之色素系追錄型DVD媒體之較佳基本構造 ,如第3 A、3 B圖,第一基板與第二基板(保護基板)間 有記錄層,以粘合劑貼合。第1 A至3B圖中,1表基板、 2表記錄層、3表底塗層、4表保護層、5表基板面硬塗層 、6表反射層、7表保護基板、8表粘合層。 上述記錄層可係有機色素層單層’亦可係用以提高反 射率的有機色素層與反射層之層合。記錄層與基板之間可 -19- (16) 1278845 設底塗層或保護層,爲提升功能各層亦可係二層以上之層 合構造。最常用者係第一基板/有機色素層/反射層/保護層 /粘合層/第二基板(保護基板)之構造。 ~基板~ 上述基板如上述,具有設定高頻顫動之導溝,由基板 側進行記錄再生時對於所用之雷射非係透明不可,由記錄 層側進行記錄再生時則不必透明。上述基板材料可用,例 φ 如聚酯樹脂、丙烯酸樹脂、聚醯胺樹脂、聚碳酸酯樹脂、 聚烯烴樹脂、酚樹脂、環氧樹脂、聚醯亞胺樹脂等塑膠、 或玻璃、陶瓷、金屬等。 上述基板表面亦可更形成位址信號等預格式。 一記錄層一 上述記錄層係經雷射光照射產生某種光學變化,以該 變化記錄資訊者,其材料以色素爲佳。 · 上述色素有例如偶氮系色素、甲腊系色素、亞甲二吡 咯系色素、(聚)次甲基系色素、萘菁系色素、酞菁系色 素、四吖紫質系色素、史克亞(squarylium)系系色素、 克酮鏠系色素、吡喃鏺系色素、萘醌系色素、蒽醌系(陰 丹士林系)色素、。山喱系色素、三苯甲烷系色素、莫系色 素、四氫膽鹼系色素、菲系色素、三酚噻畊系色素、或這 些之金屬錯合物等。其中較佳者爲偶氮(金屬螯合物)色 素、甲腊(金屬螯合物)色素、史克亞(squarylium )( -20- (17) 1278845 金屬II合物)色素、亞甲二D(t咯(金屬螯合物)色素、三 亞甲菁色素、四吖紫質色素。 上述色素之熱分解特性’分解開始溫度以1〇()至36〇 °C爲佳,100至35〇t更佳。上述分解開始溫度若超過 3 6 0 C則錄時會有坑之形成不順,抖動特性變差,而不 及100°c則碟片之保存安定性惡化。 上述色素爲提升光學特性、記錄靈敏度、信號特性等 ’亦可混合以其它有機色素、金屬、金屬化合物、或層合 Φ 色素層及其匕有機色素、金屬、金屬化合物所成之層。 上述金屬或金屬化合物有例如In、Te、Bi、Se、Sb 、Ge、Sn、Al、Be、Te02、SnO、As、Cd 等,可各分散 混合或層合使用。 亦可於上述染料中更分散混合以例如離子體樹脂、聚 醯胺樹脂、乙烯系樹脂、天然高分子、聚矽氧、液態橡膠 等種種材料、或矽烷偶合劑等,爲改良特性亦可倂用安定 劑(例如過渡金屬錯合物)、分散劑、難燃劑、滑劑、抗 鲁 靜電劑、界面活性劑、塑化劑等。 上述記錄層之形成可經蒸鍍、濺鍍、CVD '溶劑塗敷 等一般方法進行。使用上述塗敷法時,可將上述染料等溶 解於有機溶劑,以噴霧、輥塗、浸沾、旋塗等常用塗敷法 爲之。 上述有機溶劑一般有甲醇、乙醇、異丙醇等醇類;丙 酮、丁酮、環己酮等酮類;N,N—二甲基甲醯胺、N,N -二甲基乙醯胺等醯胺類;二甲亞碾等亞硕類;四氫呋喃 -21 - (18) 1278845 、二哼烷' 二***、乙二醇一甲醚等醚類;乙酸甲醋、乙 酸乙酯等酯類;氯仿、二氯甲烷、二氯乙烷、四氣化碳、 三氯乙烷等脂肪族鹵化烴類;苯、二甲苯、氯苯、二氯苯 等芳香族類;甲氧乙醇、乙氧乙醇等賽璐蘇類;己院、戊 烷、環己烷、甲環己烷等烴類等。 上述記錄層之膜厚以100埃至10微米爲佳,200至 2000埃更佳。 一底塗層一 ; 上述底塗層係爲(1 )粘合性之提升,(2 )水或氣體 等之阻障,(3 )記錄層保存安定性之提升,(4 )反射率 之提升,(5 )保護基板免受溶劑之害,(6 )導溝、導坑 、預格式之形成等目的而設。對於上述(1 )之目的,可 用離子體樹脂、聚醯胺樹脂、乙烯基樹脂、天然樹脂、天 然高分子、聚矽氧、液態橡膠等種種高分子化合物、或砂 院偶合劑等。針對上述(2)及(3)之目的,上述高分子 材料以外,可用 SiO、MgF、Si02、TiO、ZnO、TiN、SiN 等無機化合物,更可用Zn、Cu、Ni、Cr、Ge、Sn、An、 Ag、A1等金屬或半金屬。針對上述(4 )之目的,可用 Al、Au、Ag等金屬,次甲基染料、。山。星系染料等所成之 具有金屬光澤的有機薄膜。對於上述(5)及(6)之目的 ’可以使用紫外線硬化樹脂、熱硬化樹脂、熱塑性樹脂等 〇 上述底塗層之膜厚以0.0 1至3 0微米爲佳,〇 . 〇 5至 -22- (19) 1278845 l 〇微米更佳。 一反射層一 上述反射層之材料有例如,All、Ag、Cr、Ni、Α1、 Fe、Sn等單質可得高反射率,不易腐蝕之金屬、半金屬 ,這些之合金等,其中基於反射率、生產力,以金、金合 金、銀、銀合金、銘、銘合金爲尤佳。 上述反射層之成膜法無特殊限制,可隨目的適當選擇 ,有例如蒸鍍、濺鍍等。 上述反射層之膜厚以50至5 0 00埃爲佳,100至3 000 埃更佳。 -保護層、基板面硬塗層一 上述保護層及基板面硬塗層係爲(1)保護記錄層( 反射吸收層)免於損傷、麈埃、污染等,(2 )提升記錄 層(反射吸收層)之保存安定性,(3 )提升反射率等目 的而使用。針對這些目的,可以使用與上述下拉層同之材 料。又,亦可用聚丙烯酸甲酯、聚碳酸酯、環氧樹脂、聚 苯乙烯樹脂、聚酯樹脂、纖維素樹脂、脂肪族烴樹脂、天 然橡膠、苯乙烯丁二烯樹脂、氯丁二烯橡膠、腊、醇酸樹 脂、乾性油、松脂等熱軟化性、熱熔性樹脂等有機材料。 最佳者爲生產力優之紫外線硬化樹脂。 上述保護層或基板面硬塗層之膜厚以〇.〇1至30微米 爲佳,〇·〇5至10微米更佳。 -23- (20) 1278845 上述底塗層 '保護層及基板面硬塗層可如同記錄層, 含有安定劑、分散劑、難燃劑、滑劑、抗靜電劑、界面活 性劑、塑化劑等。 一保護基板- 上述保護基板’當由保護基板側照射雷射光時,對於 所用之雷射光必須透明,單用作保護板時不透明亦可。 可用之保護基板材料與上述基板材料完全相同,可用 例如聚酯樹脂、丙嫌酸樹脂、聚醯胺樹脂、聚碳酸醋樹脂 、聚烯烴樹脂、酚樹脂、環氧樹脂、聚醯亞胺樹脂等塑膠 、或玻璃、陶瓷、金屬等。 一粘合層一 上述粘合層之材料若係可粘合二片記錄媒體之材料即 無特殊限制’可隨目的適當選擇,考慮生產力時,以紫外 線硬化型粘合劑或熱熔型粘合劑爲佳。 (記錄再生裝置) 本發明之記錄再生裝置係具有,對於具有設定高頻顫 動之導、溝的基板上有至少含有機色素之光記錄媒體的記錄 層’以最短紋路以外之各紋路使加熱脈衝之最前部及後端 部二處於一定時間高輸出化,且該加熱脈衝之最前部脈衝 光功率大’於後端部脈衝光功率之一脈衝光進行記錄之記 錄機構而成,更於必要時具有其它機構。 -24- (21) 1278845 上述記錄機構係以於記錄紋路之際,使所有紋路的脈 衝後端部以後之冷卻脈衝的照射光量於一定時間0.1毫瓦 以下之機構爲佳。 上述記錄機構有例如光碟機等。 上述光記錄媒體有例如 DVD - RAM · WO、DVD - R 、DVD + R 以及 DVD - RAM、DVD — RW、DVD + RW 碟片 可記錄之DVD等。前者之DVD-RAM· WO、DVD— R、 DVD + R係只能記錄一次之DVD (亦稱DVD Write Once) · ,後者之 DVD — RAM、DVD — RW、DVD + RW係能多次記 錄之DVD。 本發明之記錄再生裝置,較佳者爲具有使最短紋路之 脈衝光功率,與該最短紋路以外之紋路的脈衝最前部之高 輸出化脈衝光功率相等之機構。 本發明之記錄再生裝置,較佳者爲具有使脈衝後端部 以後之冷卻脈衝照射光量〇 · 1毫瓦以下之時間,爲最短間 隔的1/6至6/6之長度的機構。 φ 本發明之記錄再生裝置,較佳者爲具有將形成前一間 隔長度係最短之紋路的記錄脈衝列之最前加熱脈寬,依該 紋路之長度是否最短作區別,將最短紋路之最前加熱脈寬 設定爲長於非最短紋路之最前加熱脈寬,並且,將形成最 短紋路之記錄脈衝列的最前加熱脈寬’依該最短紋路之前 一間隔長度是否爲最短作區別,將前一間隔長度係最短之 紋路的最前加熱脈寬,設定爲短於前一間隔長度非最短之 紋路的最前加熱脈寬之機構。 -25- (22) 1278845 在此,參照第8圖說明,以本發明之記錄再生裝置實 施本發明之記錄再生方法的一樣態。 弟8圖係光碟機主要構造之一例的功能方塊圖。第8 圖中11示光碟、12示主軸馬達、13示光檢取器、14示 馬達驅動機、1 5示讀出放大器、16示伺服機構、1 7示 DVD解碼器、18示ADIP解碼器、19示雷射控制器、20 示DVD編碼器、21示DVD — ROM編碼器、22示緩衝 RAM、23示緩衝區管理器、24示DVD-ROM解碼器、25 示 ATAPI/SCSI 介面、26 示 D/A 轉換器、27 示 ROM、28 不CPU、29不RAM、LB示雷射光,Audio示聲頻輸出信 號。 第8圖中箭頭示資料之主要流向,爲圖之簡化,第8 圖中控制各方塊的CPU28僅附以粗線,與各方塊之連接 省略。ROM27儲存有,以CPU可解讀之碼寫成的控制程 式。光碟機之電源成爲ON之狀態,則上述程式載入於圖 未示之主記憶體,上述CPU28依程式控制上述各部之動 作,同時控制所需資料等亦暫存於RAM2 9。 光碟機之構造及動作如下。光碟1 1由主軸馬達1 2驅 動旋轉。該主軸馬達1 2以馬達驅動機14及伺服機構1 6 控制於一定線速或角速。該線速或角速可作階段性變更。 光檢取器13內建有圖未示之半導體雷射、光學系統 、對焦致動器、軌跡致動器、受光元件及位置感測器,將 雷射光LB照射於光碟1 1。又,該光檢取器1 3可由尋覓 馬達移往滑軌方向。這些對焦致動器、軌跡致動器、尋覓 -26- (23) (23)1278845 馬達基於得自受光元件及位置感測器之信號,以馬達驅動 機1 4及伺服機構1 6控制雷射光LB之光點使之位於光碟 1 1上之目的位置。 於是’尋覓時,由光檢取器1 3得之再生信號以讀出 放大器15放大,二進位化後輸入於DVD解碼器17。輸 入之二進位化資料於該DVD解碼器17雙調變爲8/16。而 記錄資料係每8位元整合調變(8 /1 6調變),該調變係將 8位元轉換爲1 6位元。此時附以結合位元,以使目前爲 鲁 止的”1”及”0”之數成爲平均相等。此即所謂「DC成分之 抑制」,DC刻畫再生信號之片階變動受壓抑。 經雙調變之資料進行去交插及錯誤訂正處理。然後, 該資料輸入往DVD - ROM解碼器24,爲提高資料之可靠 度更進行錯誤訂正處理。如此二次進行錯誤訂正處理之資 料,由緩衝區管理器23暫存於緩衝RAM22,排成扇區資 料之狀態下,透過ATAPI/SCSI介面25,一倂轉送至圖未 示之主電腦。而音樂資料者,輸出自DVD解碼器17之資 φ 料,輸入至D/A轉換器26,以類比聲頻輸出信號Audi〇 取出。 記錄時,通過ATAPI/SCSI介面25自主電腦送出之 _ 資料,由緩衝區管理員23暫存於緩衝RAM22。然後,記 錄動作開始,此時,須於之前使雷射光點位於寫入開始處 。於DVD + RW/ + R,該處係由預先於光碟1 1上由軌跡蛇 行刻畫之顫動信號求出。 而於D V D - R W / - R,該處係取代顫動信號改由坑前 -27- (24) 1278845 平坦部,於DVD - RAM/RAM · WO則由前坑求出。 DVD + RW/ + R碟片之顫動信號含所謂 ADIP ( ADress In Pre-groove)之位址資訊,該資訊係由ADIP解碼器18 取出。又,該AD IP解碼器18產生之同步信號,於DVD 編碼器2 0進行錯誤訂正碼之附加、交插,經雷射控制器 1 9、光檢取器1 3,以本發明之記錄波形記錄於光碟1 1。 其次,第9圖係使用第8圖之光碟機之資訊處理裝置 的略圖。 該資訊處理裝置50具備主控制裝置51、介面52、記 錄裝置(HDD) 53、輸入裝置54以及顯示裝置55等。 主控制裝置5 1係含微電腦、主記億體(圖皆未示) 等而構成,控制主電腦全體。 介面52係與光碟機之雙向通信介面,係依據AT API 及SCSI等之標準介面。介面連接於光碟機之介面25(參 考第8圖)。而各介面間之連接形態不只用通信纜線(例 如S C SI纜線)等之通信線的纜線連接,亦可係利用紅外 線等之無線連接。 記錄裝置(HDD,硬碟機)53儲存有可由主控制裝 置的微電腦解讀之碼寫成的程式。當資料處理裝置的驅動 電源成爲ON之狀態時,上述程式載入於主控制裝置的主 記憶體。 顯示裝置55具備例如CRT、液晶顯示器(LCD )、 電漿顯示面板(PDP)等顯示部(圖未示),顯示來自主 控制裝置的各種資訊。 -28- (25) 1278845 輸入裝置54具備鍵盤、滑鼠、指標裝置等中至少其 一輸入媒體(圖未示),將使用者輸入之各種資訊通知主 控制裝置。而,來自輸入媒體之資訊亦能以無線方式輸入 。亦有顯示裝置與輸入裝置一體化者,例如附有觸控板之 CRT等。又,資訊處理裝置搭載有作業系統(0S )。並 且,構成資訊處理裝置之所有元件即皆由〇 S管理。 利用本發明之記錄再生方法及記錄再生裝置,對於色 素系追錄型DVD媒體,無論於何種線速皆可低抖動、低 錯誤率記錄,可高效率實施能比用於DVD - R之坑前平坦 部格式更簡便製造之高頻顫動格式的資料部之加寫。而且 ,對於與目前大量製造之CD - R、CD — RW大致同一格式 之色素系追錄型DVD媒體(例如DVD+ R)亦能記錄。 實施例 以下藉實施例及比較例更具體說明本發明,但本發明 不限於該等實施例。 -光記錄媒體之製作- 以射出成形製作具有溝深1 75 0埃,半値寬0·30微米 ,軌距0.74微米,顫動頻率相當於32Τ之導溝的厚〇.6 毫米、外徑1 20毫米之聚碳酸酯樹脂製基板。 稱取下述構造式(1)及構造式(2)之化合物至質量 比(構造式(1 ):構造式(2 ))成60 : 40,溶解於2, 2,3,3 -四氟一 1 一丙醇,旋塗於上述基板上,形成厚 -29- (26) 1278845 9 Ο 0埃之記錄層後,於8 5 °C乾燥3 0分鐘。於記錄層上以 濺鍍法將銀反射層成膜至1 1 〇 〇埃厚度。於反射層上以丙 烯酸系感光聚合物形成厚5微米之保護層。然後以丙烯酸 系感光聚合物粘合厚度0.6毫米、外徑120毫米之聚碳酸 酯樹脂製平板基板。如上製作光記錄媒體(DVD + R)。
(實施例1至1 1及比較例1、2 ) 利用所製作之光記錄媒體(DVD + R ),如下進行記錄 再生試驗。 <記錄再生條件> 實施例1至7係對於上述光記錄媒體,用震盪波長 660奈米、光束徑0.9毫米之半導體雷射光,追縱並一面 -30- (27) 1278845 將EFM信號(最小坑長約0.4微米)依下述表2之記錄 條件及記錄線速,以可使底部抖動(Bottom Jitter )爲極 小之記錄功率iS錄’將該iS錄部位再生,求出抖動値、非 對稱性、PI錯誤數。記錄雷射光之波形示於第4至7圖 。而線速21米/秒及28米/秒之脈衝長度係用第4至7圖 之脈衝長度,但本發明不限於此。 實施例8係使冷卻量爲0.4T,比本發明最短間隔長 度3T的1/6,亦即,0.5T更短。 φ 實施例9係使冷卻部之光量爲0.7毫瓦,與再生光功 率同。亦即,係使冷卻脈衝不存在之記錄波形。 實施例1 〇係使冷卻部之光量爲0.4毫瓦。 實施例1 1同實施例9無冷卻、記錄線速係高線速。 比較例1、2係以單純短形波記錄者。 以上結果列於表2。 • -31 - (28) 1278845 〔表2〕 記錄線速 (米/秒) 脈衝後端冷 卻功率(毫瓦) 冷卻 脈衝長度(T) W0/W2 W1/W2 抖動 非對 稱性 PI 錯誤 表1 修正 實施例1 21(圖 6) 0 1 1.55 1.05 7.6 0.00 5 有 實施例2 21(圖6) 0 1.5 1.60 1.15 8.4 0.00 7 Ανττ. Ίιπ 實施例3 21(圖 6) 0.1 0.8 1.65 1.20 7.3 -0.01 8 有 實施例4 28(圖 5) 0 2.0 1.80 1.08 7.5 0.01 1 有 實施例5 28(圖 5) 0 2.0 1.75 1.08 7.1 -0.01 8 有 實施例6 28(圖 5) 0.1 2.5 1.90 1.40 7.4 0.00 6 有 實施例7 28(圖 5) 0 2.0 1.75 1.25 7.3 -0.02 7 有 實施例8 28(圖 5) 0 0.4 1.75 1.05 7.9 -0.06 19 有 實施例9 21(圖 6) 0.7 0 1.55 1.05 7.8 -0.06 41 有 實施例10 21(圖 7) 0.4 L5 1.60 1.05 8.0 -0.05 33 有 實施例11 28(圖 4) 0.7 0 1.80 1.05 8.2 -0.07 50 有 比較例1 21(圖 6) 0.7 0 1.00 1.00 8.5 -0.09 85 有 比較例2 28(圖 4) 0.7 0 1.00 1.00 8.6 -0.09 100 有 -32- (29) (29)1278845 由表2之結果知,脈衝後端部以後的冷卻功率爲0. 1 毫瓦以下之實施例1至8,底部抖動、非對稱性及PI錯 誤皆優。又,冷卻功率超出〇·1毫瓦之實施例9至11,底 部抖動、非對稱性及PI錯誤略遜於實施例1至8,但優 於比較例1、2。 (實施例1 2及比較例3至5 ) 實施例1 2中,對於上述光記錄媒體,使用震盪波長 660奈米、光束徑0.9微米之半導體雷射光,追縱而一面 將E F Μ信號(最小坑長約0 · 4微米)依下述表3之記錄 條件及記錄線速,以及有表1之修正的條件下,以能使底 部抖動爲極小之記錄功率記錄,其部位予以再生求出抖動 値、非對稱性、ΡΙ錯誤數。結果列於表3。 比較例3至5係使用DVD + R所實施之LPP格式的坑 前平坦部信號(LPPb )之大小予以變動(變化)之試作 條件壓模及成形基板以外,如同實施例製作光記錄媒體( DVD - R ) ’進行如同實施例1 2之評估。結果列於表3。 •33- (30) 1278845 〔表3〕 記錄線速 _少) 脈衝後端冷 卻功率(毫瓦) 冷卻 脈衝長度(T) W0/W2 W1/W2 抖動 非對 稱性 PI 錯誤 LPPb 値 實施例12 21(圖 7) 0 1.5 1.60 1.05 7.7 0.00 7 4rfll Μ 比較例3 21(圖 7) 0 1.5 1.60 1.05 7.8 0.00 8 0.10 比較例4 21(圖 7) 0 1.5 1.60 1.05 8.0 0.00 40 0.24 比較例5 21(圖 7) 0 1.5 1.60 1.05 8.0 0.00 456 0.37 由表3之結果確認,比較例3至5之LPP格式的樣 本(DVD— R),坑前平坦部信號(LPPb )變大時抖動良 好’但PI錯誤增加。又,如比較例3之LPPb下降至 〇. 1 6之低階’則實際使用之裝置已無法檢取位址。 產業上之利用可能性 利用本發明,對於色素系追錄型D V D媒體,無論以 何種線速皆可低抖動、低錯誤率記錄,可用能比用在 DVD- R之坑前平坦部格式更簡便製造之高頻顫動格式高 頻率實施資料部之加寫。並且,對於與目前大量製造之 CD— R、CD — RW大致相同的色素系追錄型DVD媒體( 例如,DVD + R)亦可記錄。 【圖式簡單說明】 第ΙΑ' IB、1C及1D圖示通常的追錄型光記錄媒體 之層構造的一例。 -34 - (31) 1278845 第2A、2B及2C圖示通常之CD— R媒體的層構造之 一例0 第3A及3B圖示本發明之色素系追錄型DVD媒體的 層構造之一例。 第4圖示本發明之記錄線速2 8米/秒用最短紋路以外 之各紋路的最前部及後端部追加型發光波形(無冷卻脈衝 )之一例。
第5圖示本發明之記錄線速2 8米/秒用最短紋路以外 之各紋路的最前部及後端部追加型發光波形之一例。 第6圖示本發明之記錄線速2 1米/秒用最短紋路以外 之各紋路的最前部及後端部追加型發光波形(無冷卻脈衝 )之一例。 第7圖示本發明之記錄線速2 1米/秒用最短紋路以# 之各紋路的最前部及後端部追加型發光波形之一例。 第8圖係光碟機之主要構造的一例之功能方塊圖。
第9圖係使用第8圖之光碟機的資訊處理裝置之略_ 元件對照表 1 :基板 2 :記錄層 3 =底塗層 4 :保護層 5 :基板面硬塗層 35- (32) (32)1278845 6 :反射層 7 :保護基板 8 :粘合層 1 1 :光碟 1 2 ·主軸馬達 1 3 :光檢取器 1 4 :馬達驅動機 1 5 :讀出放大器 φ 1 6 :伺服機構 17 : DVD解碼器 1 8 : ADIP解碼器 1 9 :雷射控制器 20 : DVD編碼器 21 : DVD - ROM 編碼器
22 :緩衝RAM 23 :緩衝區管理器 φ 24 : DVD - ROM 解碼器 25 : ATAPI/SCSI 介面 26 : D/A轉換器
27 : ROM
28 : CPU 29 : RAM LB :雷射光 A U d i 〇 :聲頻輸出信號 -36- (33) (33)1278845 50 :資訊處理裝置 5 1 :主控制裝置 52 :介面 53 :記錄裝置(HDD ) 54 :輸入裝置 5 5 :顯示裝置
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Claims (1)
1278845 ................... 、 --.; . « . w:/ · · I - .j 拾、申請專利範圍 第93 1 07976號專利申請案 中文申請專利範圍修正本 民國95年9月29日修正 1· 一種記錄再生方法,其特徵爲:對於具有設定高 頻顫動之導溝的基板上至少有含有機色素之記錄層的光記 錄媒體之記錄層,使用最短紋路以外之各紋路,加熱脈衝 的最前部及後端部二處於一定時間經高輸出化,且該加熱 脈衝之最前部的脈衝光功率大於後端部之脈衝光功率的一 脈衝光記錄,將該記錄以再生光再生。 2·如申請專利範圍第1項之記錄再生方法,其中記錄 紋路之際,使所有紋路的脈衝後端部以後之冷卻脈衝照射 光量於一定時間在0.1毫瓦以下。 3. 如申請專利範圍第1項之記錄再生方法,其中使 最短紋路之脈衝光功率,與該最短紋路以外的紋路之脈衝 最前部之高輸出化脈衝光功率相等。 4. 如申請專利範圍第1項之記錄再生方法,其中使 脈衝後端部以後之冷卻脈衝照射光量〇. 1毫瓦以下之時間 ,係最短間隔的1/6至6/6的長度。 5 ·如申請專利範圍第1項之記錄再生方法,其中形 成前一間隔長度係最短之紋路的記錄脈衝列之最前加熱脈 寬,依該紋路長度之是否爲最短作區別,將最短紋路之最 前加熱脈寬設定爲長於非最短紋路的最前加熱脈寬’並將 形成最短紋路之記錄脈衝列的最前加熱脈寬,依該最短紋 1278845 路之前一間隔長度是否最短作區別,將前一間隔長度係最 短之紋路的最前加熱脈寬,設定爲短於前一間隔長度非最 短之紋路的最前加熱脈寬。 6 ·如申請專利範圍第1項之記錄再生方法,其中高 頻顫動係,以基本時鐘週期爲T,則頻率爲4T至96T。 7 ·如申請專利範圍第1項之記錄再生方法,其中高 頻頻顫動之振幅(Wo ),與用以控制由二分光探測器探 測出軌跡錯誤的軌跡錯誤探測信號之推拉振幅(PP )之比 (Wo/PP )係同步配合至如下式,0.1S Wo/PPS 0·4。 8. 如申請專利範圍第1項之記錄再生方法,其中記 錄光之波長係6 00至7 20奈米。 9. 如申請專利範圍第1項之記錄再生方法’其中對 於記錄光及再生光的波長±5奈米之波長範圍的光,上述 記錄層單層之折射率η係1·5$η^3·0’且衰減係數k爲 0.02^ 0.2。 10. 如申請專利範圍第1項之記錄再生方法’其中光 記錄媒體係色素系追錄型〇VD媒體° 11. 一種光記錄媒體,其特徵爲:係使用於如申請專 利範圍第1至1 〇項中任一項之記錄再生方法。 12. 如申請專利範圍第1 1項之光記錄媒體’其包括 具有設定高頻顫動之導溝的基板’及於該基板上的至少之 反射層、含有機色素之記錄層、保護層、粘合層及保護基 板。 13. 如申請專利範圍第1 1項之光記錄媒體’其中反 -2 - 1278845 射層含選自金、金合金、銀、銀合金、鋁及鋁合金之至少 一種。 14.如申請專利範圍第1 1項之光記錄媒體,其中保 護層含紫外線硬化樹脂。 15·如申請專利範圍第1 1項之光記錄媒體,其中用 以貼合二片基板成爲雙面構造之光記錄媒體的黏合層係設 於該二片基板間,且用於該黏合層之黏合劑係紫外線硬化 樹脂。 16. 如申請專利範圍第1 1項之光記錄媒體,其係追 錄型光記錄媒體。 17. 如申請專利範圍第1 1項之光記錄媒體,其係用 於DVD - R及DVD + R之任一。 18. —種記錄再生裝置,其特徵爲:具有對於有設定 高頻顫動之導溝的基板上至少有含有機色素之記錄層的光 記錄媒體之記錄層,以最短紋路以外各紋路,加熱脈衝之 最前部及後端部二處於一定時間經高輸出化,且該加熱脈 衝之最前部的脈衝光功率大於後端部之脈衝光功率的一脈 衝光進行記錄之記錄機構。 1 9 .如申請專利範圍第1 8項之記錄再生裝置,其中 記錄機構係,記錄紋路之際,使所有紋路之脈衝的後端部 以後之冷卻脈衝之照射光量於一定時間〇· 1毫瓦以下的機 構。 20.如申請專利範圍第1 8項之記錄再生裝置,其中 具有使最短紋路之脈衝光功率與該最短紋路以外之紋路的 -3- 1278845 脈衝最前部之經高輸出化的脈衝光功率相等之機構。 2 1·如申請專利範圍第1 8項之記錄再生裝置,其中 具有使脈衝後端部以後之冷卻脈衝照射光量在0· 1毫瓦以 下之時間,係最短間隔的1/6至6/6之長度的機構。 22·如申請專利範圍第1 8項之記錄再生裝置,其中 具有,將形成前一間隔長度係最短之紋路的記錄脈衝列之 最前加熱脈寬,以該紋路長度是否爲最短作區別,設定最 短紋路之最前加熱脈衝爲長於非最短紋路之最前加熱脈寬 ,並將形成最短紋路之記錄脈衝列的最前加熱脈寬,依該 最短紋路之前一間隔長度是否最短作區別,將前一間隔長 度係最短之紋路的最前加熱脈寬,設定爲短於前一間隔長 度非最短之紋路的最前加熱脈寬之機構。 23·如申請專利範圍第18項之記錄再生裝置,其中光 記錄媒體係色素系追錄型DVD媒體。
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JP3850741B2 (ja) | 2002-02-22 | 2006-11-29 | 株式会社リコー | 光記録方法 |
KR100429884B1 (ko) * | 2002-03-18 | 2004-05-03 | 삼성전자주식회사 | 광 기록매체에 데이터를 기록하는 방법 및 그 장치 |
JP4151399B2 (ja) | 2002-12-18 | 2008-09-17 | 太陽誘電株式会社 | 光情報記録媒体 |
JP4137691B2 (ja) * | 2003-04-30 | 2008-08-20 | 株式会社リコー | 光記録媒体 |
JP3732499B2 (ja) * | 2003-08-26 | 2006-01-05 | 株式会社リコー | 色素系追記型dvd媒体の記録再生方法及び装置 |
US7480223B2 (en) * | 2004-01-30 | 2009-01-20 | Ricoh Company, Ltd. | Recording and reading method and device for dye based write-once DVD medium |
-
2004
- 2004-02-12 JP JP2004035679A patent/JP2005243053A/ja active Pending
- 2004-03-19 EP EP04722037A patent/EP1607945A4/en not_active Withdrawn
- 2004-03-19 WO PCT/JP2004/003713 patent/WO2004086375A1/ja active Application Filing
- 2004-03-24 TW TW093107976A patent/TWI278845B/zh not_active IP Right Cessation
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2005
- 2005-09-23 US US11/233,146 patent/US7532556B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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US20060062117A1 (en) | 2006-03-23 |
WO2004086375A1 (ja) | 2004-10-07 |
EP1607945A4 (en) | 2008-08-06 |
EP1607945A1 (en) | 2005-12-21 |
TW200425108A (en) | 2004-11-16 |
JP2005243053A (ja) | 2005-09-08 |
US7532556B2 (en) | 2009-05-12 |
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