501128 A7 B7 五、發明説明（1 ) 技術領域 本發明係有關一種光記錄媒體以及光記錄方法，係因 應所提供之記錄的資訊，多階切換雷射光束的照射時間並 照射至光記錄媒體，以多階記錄上述資料。 習知技術 如習知光記錄媒體，許多有關對於藉由多階改變之再 生信號長度（反射信號調變部的長度）以記錄資料的方法 ，藉由多皆段切換再生信號的深度（反射信號的調變度） ，對相同長度的各信號記錄複數的資料之方法的硏究。 根據該光記錄方法，與單純因凹洞之有無記錄2維的 資料之場合比較，由於在深度方向可記錄複數的資料，因 此可增加分配固定長度之信號量，從而，可使線記錄密度 提昇。做爲多階切換再生信號之深度的方法，一般多階切 換雷射光素之能源，以形成新種類之不同記錄遮罩。現在 ，提案有一種利用雷射攝影者或將記錄層設爲多層之記錄 媒體。 此外，在此，以多階變化反射信號之調變度的方式將 記錄各資料者稱爲多階記錄。 發明所欲解決之課題 另外’這些多階記錄隨著記錄時之雷射光束的能源變 大’亦即隨著形成之反射信號的深度變深，導致再生時之 信號品質劣化之問題。該理由雖未明，惟在本發明者的想 -4- (請先閱讀背面之注意事項再填寫本頁} 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） 501128 A7 B7 五、發明説明（2) 法中，推測係因增加雷射之能量而導致增加記錄遮罩的面 積（記錄遮罩區域）。 (請先閱讀背面之注意事項再填寫本頁) 例如，爲了使光記錄媒體之記錄資訊量高密度化而縮 短記錄遮罩，其中，在多階切換雷射能源進行多階記錄時 ，其信號品質的劣化顯著，結果，多階記錄之優點無法產 生。亦即，若採用多階記錄，則記錄遮罩的間隔廣，必須 某程度確實檢測信號品質變差。一般，聚光光束的直徑以 Κ λ /NK ( K :定數、λ :雷射波長、NA :透鏡的開口數） 表示。CD所利用之拾訊器中λ = 780mm、ΝΑ= 0.45，直徑 約爲1.6/zm。此時，記錄遮罩長成爲1.6/zm左右時，上述 信號劣化之問題顯著，使變化雷射能源之5階段以上的多 階記錄變爲困難。 以上之問題，雖考慮所謂雷射光束之能源設定以及光 記錄媒體的特性等要素爲複雜組合之結果，惟本發明者所 知的範圍其原因仍不明朗，高密度之多接記錄包含光記錄 媒體以及記錄方法未能達成爲實情。 本發明係有鑑於上述之問題而硏創者，目的在於提供 一'種藉者將光g3錄媒體之特性設定在固定的狀態，提案新 的多階記錄手法且可達到高密度之多階記錄。 用以解決課題之方案 本發明就光記錄媒體反覆進行精密之硏究，在此發現 一種多階記錄之記錄方法，藉由該記錄方法，在光記錄媒 體確認可進行5階段之高密度多階記錄。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 501128 A7 B7 五、發明説明（3) 亦即，藉由以下的本發明可達成上述目的。 (請先閲讀背面之注意事項再填寫本頁) (1 ) 一種光記錄媒體，其係藉由對於光透過性基板上 所形成之記錄層照射雷射光束而可記錄資訊之光記錄媒體 ，其特徵在於，在與上述光記錄媒體之上述雷射光束的相 對移動方向，可規定連續有與規定單位長度以及與此垂直 之方向之規定單位寬度的複數假想記錄單元，同時將來自 上述假想記錄單元之上述雷射光束未照射狀態的初期反射 率X%以及該雷射光束已照射狀態之界限最低反射率Y%所 規定的反射率變動寬度設爲X/100— Y/100時，藉由固定能 量之上述雷射光束照射使其變動寬度設爲100%時之20%左 右從初期反射率X%變化所需之時間設爲A，且，藉由上述 雷射光束照射使上述反射率變動寬度x/100— Y/100之80% 左右從初期反射率X%變化所需之時間設爲B時，以上述假 想單元爲1.8< ( B— A) /A< 11之特性的方式設定，對於 該假想記錄單元，形成可多階記錄5階段以上切換固定能 量之上述雷射光束的照射時間。 (2) 如第（1)項之光記錄媒體，其中包含有記錄遮 罩，係於藉由多階記錄5階段以上切換固定能量之上述雷 射光束的照射時間所形成支付數尺寸的記錄遮罩至少一部 份，成爲讀取雷射之聚光光束腰部之直徑以下的長度。 (3) 如第（1)或（2)項之光記錄媒體，其中上述光 記錄媒體之上述記錄層包含有機色素成分而組成。 (4 )如第（1 )或（2 )項中任一項之光記錄媒體，其 中記錄前之上述假想記錄單元的上述初期反射率X爲60% 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) ΓβΤ 501128 A 7 B7_ 五、發明説明（4) 以上，並且記錄後之上述界限最低反射率爲40%以下。 (請先閲讀背面之注意事項再填寫本頁) (5 )如第（3 )項之光記錄媒體，其中上述記錄層之 特性爲記錄前之上述假想記錄單元的上述初期反射率X爲 60%以上，並且記錄後之上述界限最低反射率爲40%以下。 ¾濟.邓皆达村4苟肖工消費合汴注印製 (6 ) —種光記錄方法，其特徵在於藉由對於光透過性 基板上所形成之記錄層照射雷射光束而可記錄資訊之光記 錄媒體，在與上述光記錄媒體之上述雷射光束的相對移動 方向，可規定連續有與規<定單位長度以及與此垂直之方向 之規定單位寬度的複數假想記錄單元，同時將來自上述假 想記錄單元之上述雷射光束未照射狀態的初期反射率X%以 及該雷射光束已照射狀態之界限最低反射率Y%所規定的反 射率變動寬度設爲X/100—ΥΠ〇〇時，藉由固定能量之上述 雷射光束照射使其變動寬度設爲100%時之20%左右從初期 反射率X%變化所需之時間設爲A，且，藉由上述雷射光束 照射使上述反射率變動寬度X/100—Y/100之80%左右從初 期反射率X%變化所需之時間設爲B時，以上述假想單元爲 1.8 <( B - A ) /A < 11之特性的方式設定，對於該假想記錄 單元，形成可多階記錄5階段以上切換固定能量之上述雷 射光束的照射時間。 (7 )如第（6 )項之光記錄方法，其中上述記錄層之 特性係形成有記錄遮罩，於藉由多階記錄5階段以上切換 固定能量之上述雷射光束的照射時間所形成支付數尺寸的 記錄遮罩至少一部份，成爲讀取雷射之聚光光束腰部之直 徑以下的長度。 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 501128 A7 B7 五、發明説明（5) (8 )如第（6 )或（7 )項中任一項之光記錄方法，其 中上述光記錄媒體之上述記錄層包含有機色素而組成。 (9 )如第（6 )或（7 )項中任一項之光記錄方法，其 中上述記錄層之特性爲記錄前之上述假想記錄單元的上述 初期反射率X爲60%以上，並且記錄後之上述界限最低反 射率爲40%以下。 (10 )如第（8 )項之光記錄方法，其中上述記錄層之 特性爲記錄前之上述假想記錄單元的上述初期反射率X爲 60%以上，並且記錄後之上述界限最低反射.率爲40%以下。 本發明者著眼於光記錄媒體之反射率之反射率之變動 特性與多階記錄手法之雙方。特別是有關光記錄媒體，著 眼於雷射光束照射時間與其反射率之變化關係，若在上述 關係式（1 )範圍內判斷可大幅降低多階記錄之際的信號劣 化。 根據發明者之解析，反射率的變動可知，如第5圖之 模式圖所示，與雷射光束的照射時間以及完全之比例關係 無關。全體的反射率變動開始於初期反射率X%，至到達反 射率變動寬度P之約20%爲止的初期時間區域Η中反射變 動變小，到達反射率變動寬度Ρ之約80%之間之中間時間 區域I變動較大，在最終時間區域J反射變動變小，最終結 束於界限最低反射率Υ%。 根據本發明者所硏創之該特性可知，在多階記錄中重 要的重點爲脫離初期時間區域所需的時間Α以及脫離其後 之中間區域I爲止所需的時間B之關係。這是因爲多階記 -8- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） 501128 A7 _______B7___ 五、發明説明（6) 錄在初期反射率X%與於界限最低反射率Y%之間必須多階 設定•記錄反射率，而必須有效活用其上述之中間時間區 域Ϊ之緣故。亦即’對於記錄雷射時間Α與時間Β之平均 具有重大意義。 貫際上’根據本發明者之解析，上述關係式（1)之範 圍內雖可進行5階段以上之多階記錄，惟即使在其範圍外 過大（10以上）或過小（1 · 8以下），確認將對多階記錄產 生障礙。例如，在該關係式（1 )中，（B — A )在1.8以下 時’因記錄能量產生的反射率變動陡急，故無法設定適當 的記錄能量’又，11以上時對於記錄能量之反射變動率過 小’推測無法設定適當的能量。同時，初期時間A與中間 時間B的平均惡劣，不適合應用於多階記錄之光記錄媒體 i -xy ] % ft 滿足上述條件時，適當設定記錄層的材料、記錄層的 膜厚、反射層的材料、基板的材料•厚度以及用於雷射導 引並刻於基板之槽的形狀等。除了該方法以外，已知亦可 適當調整記錄時之雷射能量。所設定之該雷射能量成爲光 記錄媒體之推獎記錄能源。例如，事先記錄於光記錄媒體 之ATIP等。例如’若推獎記錄能源設定爲高，則（B-A ) /A變大，若設定爲低則則（Β·Α ) /A變小。 此外，在上述關係式（1)範圍內，尤其以2S ( B-A ) / A € 9最佳。 又，若利用在上述範圍內所設定的光記錄媒體（習知 爲不可能），可包含讀取雷射之聚光光束腰部以下之記錄 9 - (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 501128 A7 _____ B7 五、發明説明（7) (請先閲讀背面之注意事項再填寫本頁} 遮罩，可大幅降低其時信號之劣化。此外，實際上，藉由 能源控制近靈欸設光束照射者，結果使聚光光束腰部以下 之記錄遮罩的生成困難。本發明者不僅調變能源，一般設 定僅使用顯示…分布之雷射光固定強度之閥値之定能源， (對於單位假想記錄單元）藉由5階段以上切換照射時間 以控制雷射光束，確認可生成聚光光束腰部以下之記錄遮 罩。從以上各要素若利用本發明之光記錄媒體則可獲得包 含極高之5階段以上且聚光光束腰部以下之遮罩之可記錄 密度之光記錄媒體。 又，在上述發明中，以上束光記錄媒體之上述記錄層 包含有機色素成分而組成爲佳。實際上，根據本發明者藉 由有機色素成分的反應生成記錄遮罩的方法，可達成上述 之多階記錄。 又，在上述發明中，較理想爲，記錄前之上述假想記 錄單元的上述初期反射率X爲60%以上，並且記錄後之上 述界限最低反射率爲40%以下。若以如此方法進行，可充 分確保反射率變動寬度，而且可生成多階之記錄遮罩。 此外，本發明之光記錄媒體亦可爲如下之構成。 (11 )如第（1 )至（5 )項之光記錄媒體，其中上述 假想記錄單元的單位長度設定爲與藉由上述最大照射時間 之雷射光束形成的記錄遮罩長度略等長。 (12 )如第（1 )至（5 )項以及第（11 )項中任一項 之光紀錄媒體，其中沿著上述紀錄層設有雷射光束導引用 的槽，上述假想紀錄單元設定在上述槽內，且上述單位寬 ^紙張尺度適用中國國家標準（ CNS ) A4規格（210X 297公瘦) _ 1〇 . 501128 A7 ___B7______ 五、發明説明（8 ) 度與上述槽的寬度一致。 (請先閲讀背面之注意事項再填寫本頁) (13 )如第（1 )至（5 )項以及第（11 )或（Π )項中 任一項之光紀錄媒體，其中在上述紀錄層的一部份對預先 資訊進行多階紀錄完成。 (14)如第（1)至（5)項以及第（11.)至（13)項中 任一項之光紀錄媒體，其中至少在上述假想紀錄單元與多 階紀錄結束部分任一方紀錄有顯示多階降路媒體之特定資 訊。 (15 )如第（1 )至（5 )項以及第（11 )至（1 3 )項中 任一項之光紀錄媒體，其中沿著上述紀錄層設有雷射光束 導引用的槽，該槽中一部份爲途切。 圖示之簡要說明 第1圖係顯示本發明實施形態例之光記錄媒體之主要 部分之一部份剖面之斜視圖。 第2圖係用以顯示在該記錄媒體使用雷射光束記錄資 訊之光記錄裝置之方塊圖。 . 第3圖係顯示利用該記錄裝置在記錄層形成記錄遮罩 't t 之際假想記錄單元以及其光反射率與該記錄遮罩之關係模 | 式圖。 7 第4圖係顯示將照射假想記錄單元之雷射光束設爲其 ^ 他形狀時之略示斜視圖。 | 第5圖係模式顯示有關本發明光記錄媒體之反射率的 ί 變動之槪念圖。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） _ n _ 501128 A7 B7 L、發明説明（9) 元件圖號說明 10光記錄媒體 1 2記錄層 14基板 16槽 1 8反射膜 20保護層 30光記錄裝置 32主軸 36雷射 38雷射驅動器 40假想記錄單元 42記錄光學素 42A接物鏡 42B半透鏡 42C光束整形三稜鏡 44聚焦伺服電路 46饋送伺服電路 48A 至 48G、49、 52坑洞 56槽中斷部 D光束 發明之實施形態 54記錄遮罩 (請先閲讀背面之注意事項再填寫本頁) 以下，參照圖面詳細說明本發明之實施形態。 有關本發明之實施形態例之光記錄媒體10係於記錄層 12使用色素之CD-R，係形成包括以下之構件：透明基材組 成之基板14、覆蓋形成於該基板14 一側之面（第1圖上面 )之雷射光束導引用槽16並加以塗布之色素所形成的上述 記錄層12、藉由濺鍍法等在該記錄層12上側形成之金或銀 等反射膜18以及覆蓋該反射膜18之保護層20。 用於上述記錄層12之色素爲喹啉藍、份菁、次甲基系 色素以及其介電體、苯硫酚金屬錯鹽、酞菁色素、萘酞菁 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -12 - 501128 A7 B7 _ 五、發明説明（10) 以及偶氮基色素等有機色素。 (請先閱讀背面之注意事項再填寫本頁) 上述光記錄媒體10之多階記錄係透過第2圖所示之光 記錄裝置30進行。 該光記錄裝置30爲CD-R記錄器，透過主軸伺服器31 並藉由主軸監視器32以線速度固定之條件旋轉驅動光記錄 媒體10，藉由來自雷射36之雷射光束於光記錄媒體1 〇 ( 碟片）記錄資訊者。 上述雷射36因應應該記錄的資訊，俾使藉由雷射驅動 器38控制例如雷射脈衝數，亦即第1圖以及第3圖所示之 假想記錄單元（詳細後述）40之每一個雷射光束照射時間 〇 第2圖之圖號42係包括接物鏡42A以及半透鏡42B之 記錄光學系統。接物鏡42A係藉由聚焦追蹤伺服器44進行 聚焦追蹤控制，俾使雷射光束聚光於碟片10之記錄層12。 又，接物鏡42A與半透鏡42B藉由饋送伺服器46與碟片10 同步旋轉並從其內周側以規定速度於外周側進行移動控制 〇 上述主軸伺服器31、雷射驅動器38、聚焦追蹤伺服器 44以及饋送伺服器46係透過控制裝置50加以控制。應該 記錄於記錄層1 2之資料輸入至控制裝置50。 繼之，就上述假想記錄單元40以及記錄於該假想記錄 單元40之記錄遮罩加以說明。 該假想記錄單元40如第1圖所示，在上述槽16內連 續規定於碟片34之旋轉方向亦即圓周方向。各假想記錄單 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公H . -)3 - " 501128 A7 B7 五、發明説明（11) (請先閱讀背面之注意事項再填寫本頁) 元40的圓周方向S之長度Η如第3圖所示，設定成短於光 束直徑（光束腰部直徑）D的長度，藉由在每一個假想記 錄單元40上照射雷射光束，俾使因應應記錄之資訊，形成 模式例示之記錄遮罩48Α至48G。 - 具體言之，藉著適當變化從上述雷射36射出之雷射光 束的雷射照射時間，雖在雷射光束的中心部可形成直徑不 同的記錄遮罩48A至48G (由於雷射光束爲圓形，惟邊旋 轉碟片10邊照射雷射光束，因此記錄遮罩因應照射時間成 爲長圓形）。 這是因爲已聚焦的雷射光束一般形成......分布，惟在記 錄層12上，由於雷射光束之照射時間僅在超過某閥値的部 分進行記錄，因此透過變化雷射光束的照射時間，變化可 記錄於記錄層12之雷射光束的聚光尺寸。藉此可形成例如 第3圖所示之7階段記錄遮罩48A至48G。 此時，記錄遮罩48A至48G的大小設定成使照射假想 記錄單元40讀取的雷射光束時之反射光之光反射率成爲7 階段。上述光反射率係記錄遮罩越小則越大，在記錄遮罩 未形成的假想記錄單元上成爲最大，在形成記錄遮罩48G 之假想記錄單元上成爲最小反射率。 更詳言之，上述光反射率係考慮面積比以及記錄遮罩 48A至48G自身的光透過率相對於各記錄遮罩48A至48G 之假想記錄單元40而設定。 記錄遮罩48 A至48G自身的光透過率藉由雷射光束的 照射分解變質構成記錄層12之材料，其曲折率變化之情況 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 14 - 501128 A7 _______ B7 _ 五、發明説明（12) 因記錄層12厚度方向之變化量而異。已形成的記錄遮罩部 分之光透過率若爲0，亦可不考慮上述步驟。 (請先閲讀背面之注意事項再填寫本頁) 其次，就該碟片10的特性加以說明。 該碟片10中，假想記錄單元40之上述雷射光束未照 射狀態之初期反射率爲X%，又，藉由照射雷射光束（某程 度長時間）而到達界限之反射率（最低反射率）爲Y%，從 上述之値限定有反射率變動寬度（X — Y )。 此時，結由規定能源之雷射光束照射，使假想記錄單 元40之反射率從初期反射率X%降至低於反射率變動寬度 之20%所需的照射時間爲A，又，持續照射，降低至反射率 變動寬度之80%所需的照射時間爲B。 在此，碟片10的特性以從上述各値所規定的反射率變 動平均T= (B— A)/A成爲 8 < ( B — A ) /A < 1 1 (…關係式（1 )) 之方式而設定。這是利用適當調整基板14、記錄層12 、反射層20等厚度或材質而達成。 藉由這種設定，對於假想記錄單元40，如全部所說明 般，一 5階段以上（上述例中爲7階段）切換固定能源（ 推獎記錄能源）之雷射光束照射時間成爲可多階記錄，特 別是，即使多階記錄的記錄遮罩48A至48G長度成爲低於 讀取雷射之聚光光束腰部之直徑D，亦可確實進行資料檢 測。 結果，成爲聚光光束腰部以下之極微小的記錄遮罩， 俾使5階段以上反射率不同’因爲可生成故可獲得極筒之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) " 501128 A7 B7 五、發明説明（13) 可記錄密度之光記錄媒體。 又，在上述發明中，上述光記錄媒體之上述記錄層以 包含有機色素成分而構成爲佳。實際上，如後述之實施例 中所說明，根據有機色素成份的反應生成記錄遮罩的方法 可達成上述之多階記錄。 在該碟片10中，假想記錄單元40之初期反射率X設 定在60%以上，再者，界限最低反射率Y設定爲40%以下 。這是因爲若具有某程度之反射率變動寬度，則不適合用 於5階以上之多階記錄。較爲理想的是，將初期反射率設 爲65 %以上，將界限最低反射率Y設定爲35 %以下。 此外，在本實施形態之例中，如上所述，雖顯示以光 記錄媒體10做爲CD-R即碟片而構成者，惟本發明並不限 定於此，一般適用於包含DVD-R之其他光記錄媒體者，又 並非限定於碟片狀之旋轉體者。 又，在上述實施形態中，記錄層1 2雖使用有機色素， 惟本發明並分非限定於此，若能滿足上述關係式（1 )之特 性者則足夠，除上述之有機色素外亦可爲無機色素，又適 當使用其他材料亦無妨。然而，使用上述有機色素時，對 應雷射光束5階段以上之照射時間，可確實記錄變化記錄 遮罩之大小，且可以極高之精密度讀取。 再者’上述實施形態例雖就包含未記錄資料等資訊之 未記錄區域者，惟本發明並非限定於此，亦適用於5階段 以上多階記錄之光記錄媒體。 復且’在藉由上述光記錄裝置30形成記錄遮罩之際設 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -16- (請先閱讀背面之注意事項再填寫本頁}501128 A7 B7 V. Description of the Invention (1) Technical Field The present invention relates to an optical recording medium and an optical recording method. According to the recorded information provided, the irradiation time of the laser beam is switched in multiple steps and the optical recording medium is irradiated. Record the above information in multiple levels. Conventional technologies, such as the conventional optical recording media, have many methods for recording data by changing the length of the reproduced signal (the length of the reflected signal modulation section) by multi-level changes. Variation), the study of the method of recording complex data for each signal of the same length. According to this optical recording method, compared with a case where two-dimensional data is recorded simply by the presence or absence of pits, since a plurality of data can be recorded in the depth direction, a signal amount of a fixed length can be increased, thereby improving the linear recording density. . As a method of multi-level switching the depth of the reproduced signal, the laser energy is generally switched multi-level to form a new type of different recording mask. At present, there is a proposal for a recording medium using a laser photographer or a multi-layered recording layer. In addition, a person who records each data in such a manner that the modulation degree of the reflected signal is changed in multiple steps is referred to as a multi-level recording. Problems to be Solved by the Invention In addition, "these multi-level recordings increase with the energy of the laser beam during recording", that is, as the depth of the formed reflected signals becomes deeper, the problem of signal quality degradation during reproduction is caused. Although the reason is not clear, but the inventor's thoughts -4- (Please read the notes on the back before filling in this page} This paper size applies Chinese National Standard (CNS) A4 specification (210X 297 mm) 501128 A7 B7 5 In the (2) method, it is estimated that the area of the recording mask (recording mask area) is increased due to the increase of laser energy. (Please read the precautions on the back before filling this page.) For example, to make light The recording information volume of the recording medium is increased and the recording mask is shortened. Among them, when the laser energy is switched at multiple levels for multi-level recording, the signal quality is significantly degraded. As a result, the advantages of multi-level recording cannot be produced. That is, If multi-level recording is used, the interval of the recording mask is wide, and the deterioration of the signal quality must be detected to some extent. Generally, the diameter of the condensing beam is κ λ / NK (K: fixed number, λ: laser wavelength, NA: The number of lens openings) is shown. In the pickup used by the CD, λ = 780mm, NA = 0.45, and the diameter is about 1.6 / zm. At this time, when the recording mask length becomes about 1.6 / zm, the above-mentioned signal degradation problem is significant To make changes in laser Multi-level recording of more than 5 stages of the source becomes difficult. Although the above problems take into consideration the complex combination of factors such as the energy setting of the laser beam and the characteristics of the optical recording medium, the scope of the inventor's knowledge is the reason. It is still unclear that high-density multiple access recordings including optical recording media and recording methods have not been achieved. The present invention was created in view of the above-mentioned problems, and the purpose is to provide a 'borrower of optical g3 recording media' The characteristics are set in a fixed state, a new multi-level recording technique is proposed and a high-density multi-level recording can be proposed. A solution to the problem The present invention conducts precise research on the optical recording medium repeatedly, and finds a multi-level recording here The recording method, with this recording method, it is confirmed that the optical recording medium can perform 5 stages of high-density multi-level recording. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 501128 A7 B7 V. Description of the invention (3) That is, the above purpose can be achieved by the following invention. (Please read the precautions on the back before filling this page) (1) An optical recording The medium is an optical recording medium capable of recording information by irradiating a laser beam to a recording layer formed on a light-transmitting substrate, and is characterized in that in a direction of relative movement with the laser beam of the optical recording medium, A plurality of virtual recording units continuously having a predetermined unit length and a predetermined unit width in a direction perpendicular thereto may be specified, and at the same time, the initial reflectance X% of the laser beam from the virtual recording unit in the unirradiated state and the laser beam may be specified. When the reflectance change width specified by the minimum reflectance Y% of the limit of the irradiated state is set to X / 100—Y / 100, the above-mentioned laser beam with a fixed energy is irradiated to make the change width be 20% when the change width The time required for the left and right to change from the initial reflectance X% is set to A, and the above-mentioned reflectance fluctuation width x / 100—Y / 100 is changed by about 80% from the initial reflectance X% by the laser beam irradiation. When the required time is set to B, it is set in such a way that the above-mentioned virtual unit is 1.8 < (B-A) / A < 11. For this virtual recording unit, a multi-level recording can be performed in 5 stages or more. The energy of the irradiation time of the laser beam. (2) The optical recording medium according to item (1), which includes a recording mask, which is a recording mask of a number of payments formed by switching the irradiation time of the above-mentioned laser beam with a fixed energy for 5 or more stages to record. At least a part of the cover is a length below the diameter of the waist of the focused beam of the reading laser. (3) The optical recording medium according to item (1) or (2), wherein the recording layer of the optical recording medium is composed of an organic pigment component. (4) The optical recording medium according to any one of the items (1) or (2), wherein the above-mentioned initial reflectance X of the above-mentioned imaginary recording unit before recording is 60%. The paper standard is applicable to the Chinese National Standard (CNS) A4. Specifications (210X297 mm) ΓβΤ 501128 A 7 B7_ 5. Description of the invention (4) and above, and the minimum reflectance of the above limit after recording is 40% or less. (Please read the precautions on the back before filling this page) (5) The optical recording medium as described in item (3), in which the characteristics of the above-mentioned recording layer is the above-mentioned initial reflectance X of the above-mentioned virtual recording unit before recording is 60% Above, and the minimum reflectance of the above limit after recording is 40% or less. ¾ Ji.Deng Jieda Village 4 Gou Xiaogong Consumption Combining Printing (6)-An optical recording method, which is characterized by an optical recording medium capable of recording information by irradiating a laser beam to a recording layer formed on a light-transmitting substrate In the relative movement direction of the laser beam with the optical recording medium, a plurality of imaginary recording units continuously having a predetermined unit length and a predetermined unit width in a direction perpendicular thereto may be specified, and at the same time, the imaginary records When the above-mentioned initial reflectance X% of the laser beam in the unit is not irradiated, and the minimum reflectance Y% of the limit of the irradiated state of the laser beam, the reflectance fluctuation width specified by X / 100-XΠ〇〇 The time required for the laser beam to be irradiated with a fixed energy to change its width to about 20% from the initial reflectance X% is set to A, and the laser beam is irradiated to change the reflectance. When the time required for the width X / 100 to about 80% of Y / 100 to change from the initial reflectance X% is set to B, the above imaginary unit is 1.8 < (B-A) / A < 11 Settings for Virtual recording unit, forming multilevel recording 5 or more stages above the switching fixed energy ray irradiation time of the light beam. (7) The optical recording method according to item (6), wherein the characteristics of the recording layer are formed with a recording mask, and the payment is formed by switching the irradiation time of the laser beam of the fixed energy by multi-level recording of 5 or more stages. At least a part of the recording mask of a plurality of sizes becomes a length below the diameter of the waist of the focused beam of the reading laser. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 501128 A7 B7 V. Description of the invention (5) (8) The light recording method as described in any one of (6) or (7), The recording layer of the optical recording medium is composed of an organic pigment. (9) The optical recording method according to any one of (6) or (7), wherein the characteristic of the recording layer is that the initial reflectance X of the virtual recording unit before recording is 60% or more, and after recording, The minimum reflectance of the above-mentioned limit is 40% or less. (10) The optical recording method according to item (8), wherein the characteristic of the recording layer is that the initial reflectance X of the virtual recording unit before recording is 60% or more, and the above-mentioned limit of the minimum reflection after recording is. Below 40%. The present inventors focused on both the variation characteristics of the reflectance of the optical recording medium and the multi-level recording method. In particular, with regard to optical recording media, attention is paid to the relationship between the laser beam irradiation time and its reflectance. If judged within the range of the above-mentioned relational expression (1), signal degradation during multi-level recording can be significantly reduced. According to the analysis by the inventor, it can be seen that the change in the reflectance has nothing to do with the irradiation time of the laser beam and the complete proportional relationship, as shown in the schematic diagram of FIG. 5. The overall reflectance change starts at the initial reflectance X%, and in the initial time zone until the reflectance change width P reaches about 20%, the reflection change becomes smaller, and reaches a middle between about 80% of the reflectance change width P. The time zone I fluctuates greatly, and the J reflection decreases in the final time zone, and finally ends at the limit minimum reflectance Υ%. According to this characteristic created by the present inventors, it is known that the important point in the multi-level recording is the relationship between the time A required to leave the initial time region and the time B required to leave the subsequent intermediate region I. This is because of the multi-level record -8- (Please read the notes on the back before filling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 501128 A7 _______B7___ V. Description of the invention (6) It is necessary to set and record the reflectance in multiple steps between the initial reflectance X% and the limit minimum reflectance Y%, and it is necessary to effectively use the above-mentioned intermediate time zone. That is, 'is of great significance for recording the average of laser time A and time B. According to the analysis of the present inventor, although the multi-level recording of more than 5 stages can be performed within the range of the above relational expression (1), even if it is too large (more than 10) or too small (less than 1 · 8) , Confirm that there will be obstacles to multi-level recording. For example, in the relational expression (1), when (B — A) is 1.8 or less, “the reflectance due to recording energy changes sharply, so an appropriate recording energy cannot be set”, and at 11 or more, the reflection of the recording energy If the rate of change is too small, it is assumed that an appropriate energy cannot be set. At the same time, the average of the initial time A and the intermediate time B is unsuitable for optical recording media i -xy]% ft for multi-level recording. When the above conditions are met, the material of the recording layer, the film thickness of the recording layer, and the thickness of the reflective layer are appropriately set. Materials, substrate materials, thicknesses, and shapes of grooves used for laser guidance and engraved on the substrate. In addition to this method, it is known that the laser energy at the time of recording can be appropriately adjusted. The set laser energy becomes the prize recording energy of the optical recording medium. For example, ATIP and the like recorded in advance on an optical recording medium. For example, 'If the prize record energy is set high, (B-A) / A becomes large, and if it is set low, (B · A) / A becomes small. In addition, within the range of the above-mentioned relational expression (1), 2S (B-A) / A € 9 is particularly preferable. In addition, if using the optical recording medium set in the above range (it is impossible to be known), it can include reading the record of the laser's focused beam below the waist 9-(Please read the precautions on the back before filling this page ) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 501128 A7 _____ B7 V. Description of the invention (7) (Please read the precautions on the back before filling this page} Masking can greatly reduce the time Deterioration of the signal. In addition, in fact, the beam irradiator is set by the energy control near the soul, as a result, it is difficult to generate a recording mask below the waist of the focused beam. The inventor not only modifies the energy, but generally uses only the display ... The fixed energy of the valve with a fixed intensity of the distributed laser light (for a unit of imaginary recording unit) The laser beam is controlled by switching the irradiation time by more than 5 steps to confirm that a recording mask can be generated below the waist of the focused beam. From the above By using the optical recording medium of the present invention, it is possible to obtain an optical recording medium having a recordable density including a mask having an extremely high level of 5 or more and a condensed beam below the waist. Further, in the above invention, the recording layer of the above-mentioned optical recording medium preferably has an organic pigment component, and in fact, according to the method of the present inventors, a recording mask can be generated by the reaction of the organic pigment component, which can achieve the above. Multi-level recording. In the above invention, it is preferable that the initial reflectance X of the virtual recording unit before recording is 60% or more, and the minimum reflectance of the above limit after recording is 40% or less. The method is performed to ensure sufficient reflectance variation width and generate a multi-level recording mask. In addition, the optical recording medium of the present invention may also have the following structure. (11) As in items (1) to (5) An optical recording medium in which the unit length of the imaginary recording unit is set to be approximately the same as the length of a recording mask formed by the laser beam with the maximum irradiation time. (12) As in items (1) to (5) and The optical recording medium according to any one of (11), wherein a groove for guiding the laser beam is provided along the recording layer, the imaginary recording unit is set in the groove, and the unit width is ^ The paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 male thin) _ 10. 501128 A7 ___B7______ 5. The description of the invention (8) is the same as the width of the above groove. (Please read the notes on the back before filling (This page) (13) An optical recording medium as described in any one of items (1) to (5) and (11) or (Π), in which a plurality of levels of advance information are performed in a part of the above-mentioned recording layer Recording is completed. (14) The optical recording medium according to any one of items (1) to (5) and (11.) to (13), in which at least the above-mentioned imaginary recording unit and the end of the multi-level recording are used. One record has specific information showing the multi-level descending media. (15) If the optical recording medium according to any one of items (1) to (5) and (11) to (1 3), wherein a groove referenced by a laser beam guide is provided along the recording layer, the A part of the groove is cut on the way. Brief Description of the Drawings Fig. 1 is a perspective view showing a partial cross section of a main part of an optical recording medium according to an embodiment of the present invention. Fig. 2 is a block diagram showing an optical recording device for recording information using a laser beam on the recording medium. FIG. 3 is a model diagram showing a hypothetical recording unit and the relationship between its light reflectance and the recording mask when the recording mask is formed on the recording layer using the recording device. 7 Fig. 4 is a schematic perspective view showing a laser beam irradiating a virtual recording unit with another shape. Fig. 5 is a schematic diagram showing a change in the reflectivity of the optical recording medium of the present invention. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) _ n _ 501128 A7 B7 L. Description of the invention (9) Description of component drawing number 10 Optical recording medium 1 2 Recording layer 14 Substrate 16 slot 1 8 Reflective film 20 protective layer 30 optical recording device 32 spindle 36 laser 38 laser driver 40 imaginary recording unit 42 recording optical element 42A receiving objective lens 42B half lens 42C beam shaping three focusing 44 focusing servo circuit 46 feeding servo circuit 48A to 48G, 49, 52-hole 56-slot interruption section D beam invention embodiment 54 recording mask (please read the precautions on the back before filling this page) The following describes the embodiment of the invention in detail with reference to the drawings. An optical recording medium 10 according to an embodiment of the present invention is a CD-R using a pigment in the recording layer 12 to form a substrate including a substrate 14 made of a transparent substrate and covering a surface formed on one side of the substrate 14 ( The above-mentioned recording layer 12 formed by a laser beam that guides the groove 16 and is coated with pigment, a reflective film 18 such as gold or silver formed on the upper side of the recording layer 12 by sputtering, etc., and covers the recording layer 12 The protective layer 20 of the reflective film 18. The pigments used in the above recording layer 12 are quinoline blue, cyanine, methine-based pigments and their dielectrics, thiophenol metal complex salts, phthalocyanine pigments, and naphthalocyanines. The paper standards are applicable to Chinese national standards (CNS ) A4 size (210X297mm) -12-501128 A7 B7 _ 5. Description of the invention (10) and organic pigments such as azo-based pigments. (Please read the precautions on the back before filling this page.) The multi-level recording of the optical recording medium 10 described above is performed by the optical recording device 30 shown in FIG. The optical recording device 30 is a CD-R recorder. The optical recording medium 10 is rotationally driven by the spindle servo 31 and the spindle monitor 32 at a fixed linear velocity. The optical recording is performed by a laser beam from a laser 36. Media 1 0 (disc) records the information. In response to the information to be recorded, the laser 36 controls, for example, the number of laser pulses controlled by the laser driver 38, that is, each of the imaginary recording units (detailed later) 40 shown in Figs. 1 and 3 Beam irradiation time. The number 42 in FIG. 2 is a recording optical system including an objective lens 42A and a half lens 42B. The objective lens 42A performs focus tracking control by the focus tracking server 44 so as to focus the laser beam on the recording layer 12 of the disc 10. In addition, the objective lens 42A and the half lens 42B are rotated in synchronization with the disc 10 by the feed server 46 and are controlled from the inner peripheral side to the outer peripheral side at a predetermined speed. The above-mentioned spindle servo 31, laser driver 38, focus tracking The server 44 and the feed server 46 are controlled by a control device 50. The data to be recorded in the recording layer 12 is input to the control device 50. Next, the virtual recording unit 40 and the recording mask recorded in the virtual recording unit 40 will be described. As shown in Fig. 1, the imaginary recording unit 40 is continuously defined in the groove 16 in the rotation direction of the disc 34, that is, in the circumferential direction. The paper size of each imaginary record applies to the Chinese National Standard (CNS) A4 specification (210X 297 male H.-) 3-& 501501 A7 B7 V. Description of the invention (11) (Please read the precautions on the back before filling this page ) The length S of the circumferential direction S of the element 40 is set to a length shorter than the beam diameter (beam waist diameter) D as shown in FIG. 3, and a laser beam is irradiated on each virtual recording unit 40 to respond to the problem. The information to be recorded forms the recording masks 48A to 48G exemplified by the pattern. -Specifically, by appropriately changing the laser irradiation time of the laser beam emitted from the above-mentioned laser 36, recording centers 48A to 48G with different diameters can be formed at the center of the laser beam (because the laser beam is It is circular, but the laser beam is irradiated while rotating the disc 10, so the recording mask becomes oblong according to the irradiation time). This is because the focused laser beam generally forms a ... distribution, but on the recording layer 12, since the irradiation time of the laser beam is only recorded in a portion exceeding a certain valve, the variable laser beam is transmitted through The change in irradiation time can be recorded as the condensing size of the laser beam in the recording layer 12. Thereby, for example, 7-stage recording masks 48A to 48G shown in FIG. 3 can be formed. At this time, the size of the recording masks 48A to 48G is set so that the light reflectance of the reflected light when the laser beam read by the virtual recording unit 40 is irradiated is seven steps. The light reflectance is larger as the recording mask becomes smaller, and becomes the maximum on the virtual recording unit where the recording mask is not formed, and the minimum reflectance on the virtual recording unit which forms the recording mask 48G. More specifically, the light reflectance is set in consideration of the area ratio and the light transmittance of the recording masks 48A to 48G relative to the imaginary recording unit 40 of each of the recording masks 48A to 48G. The light transmittance of the recording mask 48 A to 48G is decomposed and degraded by the irradiation of the laser beam. The material that constitutes the recording layer 12 is changed. The tortuosity is changed. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). ) _ 14-501128 A7 _______ B7 _ 5. Explanation of the invention (12) It varies with the thickness of the recording layer 12. If the light transmittance of the formed recording mask portion is 0, the above steps may not be considered. (Please read the notes on the back before filling out this page) Next, the characteristics of the disc 10 will be explained. In this disc 10, the initial reflectance of the above-mentioned laser beam irradiated state of the imaginary recording unit 40 is X%, and the reflectance (minimum reflectance) reaches the limit by irradiating the laser beam (for a certain period of time). ) Is Y%, and the reflectance variation width (X-Y) is limited from the above. At this time, the irradiation time required to irradiate the laser beam of a predetermined energy source to reduce the reflectance of the imaginary recording unit 40 from the initial reflectance X% to less than 20% of the reflectance fluctuation width is A, and the irradiation is continued , The irradiation time required to reduce to 80% of the reflectance change width is B. Here, the characteristics of the disc 10 are changed from the average reflectance specified by each of the above T = (B—A) / A to 8 < (B—A) / A < 1 1 (... Relationship (1 )). This is achieved by appropriately adjusting the thickness or material of the substrate 14, the recording layer 12, and the reflective layer 20. With this setting, as for all of the imaginary recording units 40, the laser beam irradiation time of switching the fixed energy (preferential recording energy) in a stage of 5 or more stages (7 stages in the above example) can be recorded in multiple stages. In particular, even if the lengths of the recording masks 48A to 48G of the multi-level recording become shorter than the diameter D of the waist of the focused beam of the reading laser, the data detection can be surely performed. As a result, it becomes a very small recording mask below the waist of the condensed beam, which makes the reflectance different from 5 stages above. 'Because it can be generated, the paper size of the polar tube is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). ) " 501128 A7 B7 V. Description of the invention (13) Recordable density optical recording media. In the above invention, the recording layer of the optical recording medium is preferably configured to include an organic pigment component. In fact, as explained in the examples described later, the method of generating a recording mask based on the reaction of organic pigment components can achieve the above-mentioned multi-level recording. In this disc 10, the initial reflectance X of the imaginary recording unit 40 is set to 60% or more, and the limit minimum reflectance Y is set to 40% or less. This is because if the reflectance fluctuation width is a certain degree, it is not suitable for multi-level recording of 5 or more orders. Preferably, the initial reflectance is set to 65% or more, and the limit minimum reflectance Y is set to 35% or less. In addition, in the example of this embodiment, as described above, although the optical recording medium 10 is shown as being constituted by a CD-R, that is, a disc, the present invention is not limited to this, and it is generally applicable to a DVD-R including Other optical recording media are not limited to disc-shaped rotating bodies. Further, in the above embodiment, although the recording layer 12 uses an organic dye, the present invention is not limited thereto, and it is sufficient if the characteristics of the relational expression (1) can be satisfied. In addition to the organic dye described above, It is an inorganic pigment, and other materials may be used appropriately. However, when the above-mentioned organic pigment is used, it is possible to reliably record the size of the change recording mask corresponding to the irradiation time of the laser beam in more than 5 stages, and it can be read with extremely high precision. Furthermore, although the above-mentioned embodiment includes an unrecorded area including information such as unrecorded data, the present invention is not limited to this, and is also applicable to optical recording media with multi-level recording of 5 stages or more. Restate 'When the recording mask is formed by the above-mentioned optical recording device 30, the paper size is set to apply the Chinese National Standard (CNS) A4 specification (210X297 mm) -16- (Please read the precautions on the back before filling in this page}
501128 A7 __B7 _^_ 五、發明説明（14) (請先閱讀背面之注意事項再填寫本頁) 定於記錄層12上之假想記錄單元40之尺寸並非限定於實 施形態之例。特別是若可將雷射光束之光束腰部直徑縮小 ，則長度與槽16的寬度相等亦可。另外，於8階等更多階 記錄記錄遮罩時，即使設定在雷射光束腰部以上亦無妨。 此時，某一部之記錄遮罩可設爲雷射光束腰部以上的大小 。當然，本發明係不限定於本實施例之構造，實用化之種 種構造的碟片亦可適用在本發明，即使在不具有槽16之光 記錄媒體中亦適用本發明。 又，記錄用雷射光束在記錄層12的位置雖形成圓形， 惟如第4圖所示，例如除了使用接物鏡42A之外再加上光 束整形三稜鏡42C，光束形狀在光記錄媒體10的饋送方向 爲短，俾使在與此垂直方向形成長的長圓形狀或是線狀。 此時，由於記錄遮罩49變短因此可更縮短假想記錄單元。 亦即，可使記錄密度提昇。 再者，該光記錄媒體10中，具有如第1圖中圖號52 所示，亦可藉由預先具有信號變調之段數之一部份之數量 的反射率相異的複數凹洞，又，亦可如前所述，對該光記 錄體之一部份預先進行多階記錄。在上述複數凹洞52以及/ 或多階記錄結束部分之記錄遮罩54個別識別該光記錄媒體 之資訊；用以識別多階記錄用光記錄媒體之資訊，用以決 定記錄再生該光記錄媒體之雷射光束的推獎記錄能源之資 訊等特定資訊亦可。藉由於該光記錄媒體再生及/或記錄時 讀入其特定資訊，以確實識別多階記錄用光記錄媒體，又 ’由於進行各別識別，可因應預先記錄之凹洞段數決定雷 衣紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 17 - 501128 A7 _B7___ 五、發明説明（15) 射光束之能源段數’故可更確實進行多階記錄再生。 (請先閲讀背面之注意事項再填寫本頁) 或是如第1圖之圖號56所示，即使藉由設計一部份中 途切斷雷射光束導引用槽之槽中端部亦可獲得相同的功效 。以上述方法可單獨或組合利用。 實施例 k 以下顯示本發明之實施例。該實施例之具體條件如下 所述。 使用色素於記錄層12之CD-R做爲光記錄媒體10，並 進行多階記錄之實驗。 於CD-R之記錄評價所使用的脈衝…製DDU (使用雷射 波長= 784nm)進行連接筒頻信號產生器。 再生評價亦在DDU上連接數位示波器。 多階記錄以4.8/sec之固定線速度旋轉，以4MHz之時 脈頻率數6階段變化雷射光束之照射時間並加以記錄，藉 由以相同定線速度旋轉且照射1M w之雷射光束’檢測其反 射反應光量之差進行再生。 此外，將此時所再生信號之速度偏差値取入Le Croy製 數位示波器LC-534EL並進行測定，可獲得良好的結果。速 度偏差値依存於藉由對記錄層進行雷射光束之照射所形成 的記錄遮罩的形狀，若速度偏差値愈小則意味可確實形成 上述記錄遮罩。這與可確實記錄資訊同義’從而’亦可確 實進行再生。 根據習知二維記錄再生方法進行記錄時，藉由本次所 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -^ - 501128 A7 B7____ 五、發明説明（16) 使用之評價機若測定速度偏差値低於10%，則判斷可進行 良好的記錄。 (請先閱讀背面之注意事項再填寫本頁) 實施例1 使喹啉藍色素溶解於成爲塗布溶媒之氟化醇以調製濃 度2wt%之記錄層形成用之色素溶液，該溶液藉由射出成型 於表面以旋轉數200rpm至5000rpm旋轉該塗布液以形成螺 旋狀之預槽（軌道螺距：8 // m、預槽寬度：0.35 # m、預槽 深度：0.18 // m )之聚氮酸脂（帝人化成（株）製：pan-rightAD5503)所組成之直徑120mm、1.2mm厚之光透過性 基板之預槽側表面，並藉由旋轉塗布法進行塗布，形成自 預槽內的底部厚度約200nm之有機色素記錄層。 經濟部智运时4%貸工消費合泎汪印製 繼之，藉由濺鍍法在有機色素記錄層上形成厚度約 100nm之銀的光反射層。再者，藉由濺鍍法以旋轉數 300rpm至4000rpm在該光反射層上旋轉塗布紫外線硬化性 樹脂（大日本INNKI化學工業（株）：SD318)並加以變化 。於塗布後，透過高壓水銀燈自塗膜上方照射紫外線以形 成層後10 // m之保護層。 在該記錄媒體將記錄時之雷射光束能源設定爲1 4Mw以 進行多階記錄。此外，此時的記錄線速度爲4.8m/s，記錄 之時脈頻率數設爲4MHz ( 250nsec )，記錄時之雷射照射時 間分別設爲（1) 50nsec、（2) 80nsec、（3) llOnsec、（4 )140nsec、（5) 170nsec 以及（6) 200nsec。此外，以分別 單一的照射時間沿碟片1周進行記錄。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) Q _ " ~ 501128 A7 B7 五、發明説明（17) 該光記錄媒體的初期反射率爲72% ( 0.72 )，使雷射在 250nSec以上照射時界限最低反射率成爲20% ( 0.2 )。從而 ，反射率變動寬度爲0.52 (=0.72-0.20 )。 光記錄媒體的反射率從上述初期反射率0.72降低反射 率變動寬度之20% (約0.1)所需之照射時間A爲50nsec， 降低該反射率變動寬度之80%左右（約0.4)所需之照射時 間B爲200nsec。從而，反射變動率平均T= (B— A)/A = 3 ° 在該光記錄媒體中，可達成6階段之多階記錄，可確 實讀取其記錄資料。此外，該光記錄媒體之上述（1 )至（ 6)記錄遮罩之速度偏差値雖顯示於以下表格，惟在全部的 記錄遮罩中已知可獲得10%以下之良好評價。 實施例2 將實施例1之喹啉藍變更爲酞菁，將塗布溶媒變更爲 甲基環已烷以做成色素溶液。除此之外，與實施例1完全 相同製作光記錄媒體。 記錄時之雷射光束能源設定爲1 3Mw。此外，此時的記 錄線速度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 250nsec )，記錄時之雷射照射時間分別設爲（1 ) 50nsec、( 2 ) 70nsec、（ 3) 90nsec、（ 4) llOnsec、（ 5) 130nsec 以及（ 6) 150nsec。此外，以分別單一的照射時間沿碟片1周進行 記錄。 該光記錄媒體的初期反射率爲68% (0.68)，使雷射在 (請先閱讀背面之注意事項再填寫本頁) i·衣· 訂 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -20- 501128 A7 B7 五、發明説明（18) 25 0nsec以上照射時界限最低反射率成爲22% ( 0.22 )。從 而，反射率變動寬度爲0·46 ( = 0.68-0.22 )。 光記錄媒體的反射率從上述初期反射率0.68降低反射 率變動寬度之20% (約0.92)所需之照射時間A爲50nsec ，降低該反射率變動寬度之8 0 %左右（約0.3 7 )所需之照 射時間B爲150nsec。從而，反射變動率平均T= ( B — A) / A = 2 ° 在該光記錄媒體中，可達成6階段之多階記錄，可確 實讀取其記錄資料。此外，該光記錄媒體之上述（1 )至（ 6)記錄遮罩之速度偏差値雖顯示於以下表格，惟在全部的 記錄遮罩中已知可獲得10%以下之良好評價。 實施例3 將實施例1之色素溶液變更爲喹啉藍與偶氮基金屬錯 體之混合物，此外以相同方法製作光記錄媒體。喹啉藍與 偶氮基金屬錯體之配合比設爲50 : 50wt%。 記錄時之雷射光束能源設定爲14Mw。此外，此時的記 錄線速度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 25 0nsec )，記錄時之雷射照射時間分別設爲（1 ) 20nsec、( 2 ) 56nsec、（ 3) 92nsec、（ 4) 128nsec、（ 5) 164nsec 以及（ 6 ) 200nsec。此外，以分別單一的照射時間沿碟片1周進行 記錄。 該光記錄媒體的初期反射率爲70% (0.70)，使雷射在 250nsec以上照射時界限最低反射率成爲21% ( 0.21)。從 -21 - (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） 501128 A7 B7 _ 五、發明説明（19) ‘ 而，反射率變動寬度爲0.49 ( = 0.70-0.21 )。 (請先閲讀背面之注意事項再填寫本頁) 光記錄媒體的反射率從上述初期反射率0.70降低反射 率變動寬度之20% (約0.10)所需之照射時間A爲20nsec ，降低該反射率變動寬度之80%左右（約0.39 )所需之照 射時間B爲200nsec。從而，反射變動率平均(B—A) / A = 9 0 在該光記錄媒體中，可達成6階段之多階記錄，可確 實讀取其記錄資料。此外，該光記錄媒體之上述（1 )至（ 6)記錄遮罩之速度偏差値雖顯示於以下表格，惟在全部的 記錄遮罩中已知可獲得10%以下之良好評價。 比較例1 以與實施例2之色素溶液相同的構成製作光記錄媒體 。此時，藉由調整旋轉塗布法的旋轉數變更色素膜厚爲 250nm，再者，將反射膜變更爲金。 記錄時之雷射光束能源設定爲1 3Mw，此時的記錄線速 度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 250nsec)，記 錄時之雷射照射時間分別設爲（1 ) 50nsec、（ 2 ) 70nsec、 (3 ) 90nsec、 （ 4 ) llOnsec、 （ 5 ) 13Onsec 以及（6 ) 150nsec。此外，以分別單一的照射時間沿碟片1周進行記 錄。 該光記錄媒體的初期反射率爲70% ( 0.70)，使雷射在 2 5 0nsec以上照射時界限最低反射率成爲20% ( 0.20)。從 而，反射率變動寬度爲0.5 09 (= 0.70-0.20 )。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -22- 501128 A7 B7 五、發明説明（20) (請先閲讀背面之注意事項再填寫本頁) 光記錄媒體的反射率從上述初期反射率0.70降低反射 率變動寬度之20% (約0.10)所需之照射時間A爲50nsec ，降低該反率變動寬度之80%左右（約0.40)所需之照射 時間B爲140nsec。從而，反射變動率平均T= (B—A) /A = 1.8 ° 在該光記錄媒體中，可達成6階段之多階記錄，可確 實讀取其記錄資料。此外，該光記錄媒體之上述（1 )至（ 6)記錄遮罩之速度偏差値雖顯示於以下表格，惟在全部的 記錄遮罩中已知成爲10 %以上之不佳評價。 比較例2 變更實施例3之色素溶液的配合比並製作光記錄媒體 。具體言之，喹啉藍與偶氮基金屬錯體之配合比設爲50: 5 0 w t % 〇 記錄時之雷射光束能源設定爲1 5Mw，此時的記錄線速 度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 250nsec)，記 錄時之雷射照射時間分別設爲（1 ) 20nsec、（ 2 ) 64nsec、 (3 ) 108nsec、（ 4 ) 152nsec、（ 5 ) 196nsec 以及（6 ) 240nsec。此外，以分別單一的照射時間沿碟片1周進行記 錄。 該光記錄媒體的初期反射率爲70% (0.70)，使雷射在 25Onsec以上照射時界限最低反射率成爲20% ( 0.20)。從 而，反射率變動寬度爲0.50( = 0.70-0.20 )。 光記錄媒體的反射率從上述初期反射率0.70降低反射 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 23 _ 501128 A7 B7 五、發明説明（21) (請先閱讀背面之注意事項再填寫本頁) 率變動寬度之20% (約0.10)所需之照射時間A爲20nsec ，降低該反率變動寬度之80%左右（約0.40)所需之照射 時間B爲240nsec。從而，反射變動率平均T= (B— A)/A = 11。 在該光記錄媒體中，雖可以某程度的準確率讀取記錄 資料（4 )、（ 5 )，惟無法確實讀取其他記錄資料。此外 ，該光記錄媒體之上述（1)至（6)記錄遮罩之速度偏差 値雖顯示於以下表格，惟在一部份的記錄遮罩中已知成爲 10%以上之不佳評價。 比較例3 與實施例1相同之方法製作光記錄媒體。 在此，記錄時之雷射光束能源設定爲17Mw，此時的記 錄線速度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 25 0nsec )，記錄時之雷射照射時間分別設爲（1 ) lOnsec、( 2) 40nsec、（ 3) 70nsec、（ 4) lOOnsec、（ 5) 130nsec 以及（ 6) 1 60nsec ° 經濟部智.¾財4笱a(工消f合汴汰印製 該光記錄媒體的初期反射率爲72% ( 0.72)，使雷射在 200nsec以上照射時界限最低反射率成爲20% ( 0.20)。從 而，反射率變動寬度爲0·52( = 0.72-0.20 )。501128 A7 __B7 _ ^ _ V. Description of the invention (14) (Please read the precautions on the back before filling this page) The size of the imaginary recording unit 40 on the recording layer 12 is not limited to the example of the implementation form. In particular, if the waist diameter of the laser beam can be reduced, the length may be equal to the width of the groove 16. In addition, it is not necessary to set the recording mask at more steps such as 8th order even if it is set above the waist of the laser beam. At this time, the recording mask of a certain part can be set to a size above the waist of the laser beam. Of course, the present invention is not limited to the structure of this embodiment, and discs of various structures that are put into practical use can also be applied to the present invention, and the present invention is also applicable to optical recording media having no groove 16. In addition, although the recording laser beam has a circular shape at the position of the recording layer 12, as shown in FIG. 4, for example, in addition to the use of an objective lens 42A and a beam shaping 稜鏡 42C, the beam shape is on an optical recording medium. The feeding direction of 10 is short, so that a long oblong shape or a line shape is formed in a direction perpendicular to this. At this time, since the recording mask 49 becomes shorter, the virtual recording unit can be shortened more. That is, the recording density can be improved. Further, the optical recording medium 10 has a plurality of recesses having different reflectances as shown in FIG. 52 in FIG. It is also possible to perform multi-level recording on a part of the optical recording body in advance, as described above. The plurality of recesses 52 and / or the recording mask 54 at the end of the multi-level recording individually identify the information of the optical recording medium; the information used to identify the multi-level recording optical recording medium is used to determine the recording and reproduction of the optical recording medium The specific information such as the energy information of the laser beam can be recorded. Because the optical recording medium is reproduced and / or read specific information during recording, the multi-level recording optical recording medium can be reliably identified, and because of the individual identification, the Raleigh paper can be determined according to the number of recessed segments recorded in advance. The scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 17-501128 A7 _B7___ V. Description of the invention (15) The number of energy segments of the beam can be more reliably recorded and reproduced in multiple stages. (Please read the precautions on the back before filling in this page) Or as shown in Figure No. 56 in Figure 1, even if the middle part of the slot of the laser beam guide slot is cut by designing a part The same effect. These methods can be used alone or in combination. Example k Examples of the present invention are shown below. The specific conditions of this embodiment are as follows. The CD-R of the recording layer 12 was used as the optical recording medium 10, and a multi-level recording experiment was performed. The pulses used in the CD-R recording evaluation are made of DDU (using laser wavelength = 784nm) for connection to a cylinder frequency signal generator. Regeneration evaluation is also connected to a digital oscilloscope on the DDU. The multi-level recording is rotated at a fixed linear speed of 4.8 / sec, and the irradiation time of the laser beam is changed in 6 steps at a clock frequency of 4 MHz and recorded. By rotating at the same linear speed and irradiating a laser beam of 1 Mw The difference in the amount of reflected reaction light is detected and reproduced. In addition, the speed deviation of the reproduced signal at this time was taken into a digital oscilloscope LC-534EL made by Le Croy and measured, and good results were obtained. The speed deviation 値 depends on the shape of the recording mask formed by irradiating the recording layer with a laser beam. A smaller speed deviation 値 means that the above-mentioned recording mask can be reliably formed. This is synonymous with the fact that information can be recorded ‘and’ so that reproduction can be surely performed. When recording according to the conventional two-dimensional recording and reproduction method, the paper size of this institute applies the Chinese National Standard (CNS) A4 specification (210X297 mm)-^-501128 A7 B7____ 5. Description of the invention (16) Evaluation of use If the measurement speed deviation 値 is less than 10%, it can be judged that a good record can be made. (Please read the notes on the back before filling this page) Example 1 A quinoline blue pigment is dissolved in a fluorinated alcohol as a coating solvent to prepare a pigment solution for recording layer formation at a concentration of 2% by weight. This solution is formed by injection molding. Rotate the coating liquid on the surface at a rotation speed of 200 rpm to 5000 rpm to form a spiral pregroove (orbital pitch: 8 // m, pregroove width: 0.35 # m, pregroove depth: 0.18 // m). (Pan-right AD5503, manufactured by Teijin Kasei Co., Ltd.) A 120-mm-diameter, 1.2-mm-thick light-transmitting substrate composed of a pre-groove side surface and coated by a spin coating method to form a thickness from the bottom of the pre-groove. 200nm organic pigment recording layer. The 4% loan-to-consumer consumption by the Ministry of Economic Affairs was printed by Wang Wang. Next, a light reflection layer with a thickness of about 100 nm was formed on the organic pigment recording layer by sputtering. Furthermore, an ultraviolet curable resin (Dai Nippon Chemical Industry Co., Ltd .: SD318) was spin-coated on the light-reflective layer by a sputtering method at a rotation number of 300 rpm to 4000 rpm and changed. After coating, a high-pressure mercury lamp was irradiated with ultraviolet rays from above the coating film to form a protective layer of 10 // m after the layer. In this recording medium, the laser beam energy at the time of recording was set to 14 Mw for multi-level recording. In addition, the recording linear velocity at this time is 4.8m / s, the clock frequency during recording is set to 4MHz (250nsec), and the laser irradiation time during recording is set to (1) 50nsec, (2) 80nsec, (3) llOnsec, (4) 140nsec, (5) 170nsec, and (6) 200nsec. In addition, recording was performed along the disc for one single irradiation time. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) Q _ " ~ 501128 A7 B7 V. Description of the invention (17) The initial reflectance of the optical recording medium is 72% (0.72), making the laser The minimum reflectance at the time of irradiation above 250 nSec is 20% (0.2). Therefore, the width of the reflectance variation is 0.52 (= 0.72-0.20). The reflectance of the optical recording medium is reduced from the above-mentioned initial reflectance of 0.72 to 20% (approximately 0.1) of the width of the reflectance. The irradiation time A is 50nsec. The irradiation time B was 200 nsec. Therefore, the average reflection change rate T = (B—A) / A = 3 ° In this optical recording medium, a multi-stage recording of 6 stages can be achieved, and the recorded data can be reliably read. In addition, although the speed deviations of the above (1) to (6) recording masks of the optical recording medium are shown in the following table, it is known that a good evaluation of less than 10% can be obtained in all the recording masks. Example 2 The quinoline blue of Example 1 was changed to phthalocyanine, and the coating solvent was changed to methylcyclohexane to prepare a pigment solution. Other than that, an optical recording medium was produced in the same manner as in Example 1. The laser beam energy was set to 1 3Mw during recording. In addition, the recording linear velocity at this time is 4.8m / s, the clock frequency is set to 4MHz (250nsec), and the laser irradiation time during recording is set to (1) 50nsec, (2) 70nsec, (3) 90nsec, (4) llOnsec, (5) 130nsec, and (6) 150nsec. In addition, recording was performed along the disc for one single irradiation time. The initial reflectance of this optical recording medium is 68% (0.68), so that the laser is on (please read the precautions on the back before filling in this page) i. Clothing. The size of the paper is applicable to the Chinese National Standard (CNS) A4 specification ( 210X 297 mm) -20- 501128 A7 B7 V. Description of the invention (18) The minimum reflectivity at the time of irradiation above 25 nsec becomes 22% (0.22). Therefore, the width of the reflectance variation is 0.46 (= 0.68-0.22). The reflectance of the optical recording medium is reduced from the above-mentioned initial reflectance of 0.68 by 20% (approximately 0.92) of the reflectance variation width to an irradiation time of 50 nsec, and to reduce the reflectance variation width by approximately 80% (approximately 0.3 7). The required irradiation time B is 150 nsec. Therefore, the average reflection change rate T = (B — A) / A = 2 ° In this optical recording medium, a multi-stage recording of 6 stages can be achieved, and the recorded data can be read reliably. In addition, although the speed deviations of the above (1) to (6) recording masks of the optical recording medium are shown in the following table, it is known that a good evaluation of less than 10% can be obtained in all the recording masks. Example 3 The pigment solution of Example 1 was changed to a mixture of quinoline blue and azo metal complex, and an optical recording medium was produced in the same manner. The compounding ratio of quinoline blue and azo metal complex is set to 50:50 wt%. The laser beam energy at the time of recording was set to 14 Mw. In addition, the recording linear velocity at this time is 4.8 m / s, the clock frequency during recording is set to 4 MHz (250 nsec), and the laser irradiation time during recording is set to (1) 20 nsec, (2) 56 nsec, (3 ) 92nsec, (4) 128nsec, (5) 164nsec, and (6) 200nsec. In addition, recording was performed along the disc for one single irradiation time. The initial reflectance of this optical recording medium was 70% (0.70), and the minimum reflectance at the time of laser irradiation above 250 nsec was 21% (0.21). From -21-(Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) 501128 A7 B7 _ V. Description of the invention (19) The change width is 0.49 (= 0.70-0.21). (Please read the precautions on the back before filling in this page) The reflectance of the optical recording medium is reduced from the above-mentioned initial reflectance of 0.70 by 20% (approximately 0.10) of the reflectance fluctuation width. The irradiation time A is 20nsec, which reduces the reflectance The irradiation time B required for about 80% of the change width (about 0.39) is 200 nsec. Therefore, the average reflection change rate (B-A) / A = 9 0 In this optical recording medium, a multi-stage recording of 6 stages can be achieved, and the recorded data can be reliably read. In addition, although the speed deviations of the above (1) to (6) recording masks of the optical recording medium are shown in the following table, it is known that a good evaluation of less than 10% can be obtained in all the recording masks. Comparative Example 1 An optical recording medium was produced with the same configuration as the pigment solution of Example 2. At this time, the pigment film thickness was changed to 250 nm by adjusting the number of rotations of the spin coating method, and the reflection film was changed to gold. The energy of the laser beam during recording is set to 1 3 Mw, the linear velocity of the recording at this time is 4.8 m / s, the number of clock frequencies during recording is set to 4 MHz (250 nsec), and the laser irradiation time during recording is set to (1) 50nsec, (2) 70nsec, (3) 90nsec, (4) llOnsec, (5) 13Onsec, and (6) 150nsec. In addition, recording was performed along the disc for one single irradiation time. The initial reflectance of this optical recording medium was 70% (0.70), and the minimum reflectance at the time of laser irradiation above 250 nsec was 20% (0.20). Therefore, the width of the reflectance variation is 0.5 09 (= 0.70-0.20). This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -22- 501128 A7 B7 V. Description of the invention (20) (Please read the precautions on the back before filling this page) The reflectance of optical recording media is from The above-mentioned initial reflectivity 0.70 is required to reduce the irradiation time A by 20% (about 0.10) of the width of the reflectance to be 50 nsec, and the irradiation time B required to reduce the reflectance fluctuation width by about 80% (about 0.40) is 140 nsec. Therefore, the average reflection change rate T = (B-A) / A = 1.8 ° In this optical recording medium, a multi-stage recording of 6 stages can be achieved, and the recorded data can be reliably read. In addition, although the speed deviation 値 of the above (1) to (6) recording masks of the optical recording medium is shown in the following table, it is known that all the recording masks have a poor evaluation of 10% or more. Comparative Example 2 The mixing ratio of the pigment solution of Example 3 was changed to produce an optical recording medium. Specifically, the mixing ratio of quinoline blue and azo-based metal complex is set to 50: 50 wt%. The laser beam energy during recording is set to 15 Mw, and the recording linear velocity at this time is 4.8 m / s. The clock frequency is set to 4MHz (250nsec), and the laser irradiation time during recording is set to (1) 20nsec, (2) 64nsec, (3) 108nsec, (4) 152nsec, (5) 196nsec, and (6) ) 240nsec. In addition, recording was performed along the disc for one single irradiation time. The initial reflectance of this optical recording medium was 70% (0.70), and the minimum reflectance at the time of laser irradiation above 25 Onsec was 20% (0.20). Therefore, the width of the reflectance variation is 0.50 (= 0.70-0.20). The reflectance of the optical recording medium is reduced from the above initial reflectance of 0.70. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 23 _ 501128 A7 B7 V. Description of the invention (21) (Please read the back first Please note that you need to fill in this page again.) The irradiation time A required for 20% of the rate change width (about 0.10) is 20nsec, and the irradiation time B required to reduce the reverse rate change width of about 80% (about 0.40) is 240nsec. Therefore, the average reflection change rate T = (B—A) / A = 11. In this optical recording medium, although the recorded data (4), (5) can be read with a certain degree of accuracy, other recorded data cannot be read with certainty. In addition, the speed deviation of the above-mentioned (1) to (6) recording mask of the optical recording medium 値 is shown in the following table, but a part of the recording mask is known to have a poor evaluation of more than 10%. Comparative Example 3 An optical recording medium was produced in the same manner as in Example 1. Here, the energy of the laser beam during recording is set to 17 Mw, the linear velocity of the recording at this time is 4.8 m / s, the number of clock frequencies during recording is set to 4 MHz (250 nsec), and the laser irradiation time during recording is set to (1) lOnsec, (2) 40nsec, (3) 70nsec, (4) 100nsec, (5) 130nsec, and (6) 1 60nsec ° Ministry of Economics. ¾ 4 笱 a The initial reflectance of the optical recording medium is 72% (0.72), and the minimum reflectance when the laser is irradiated above 200nsec is 20% (0.20). Therefore, the reflectance fluctuation width is 0.52 (= 0.72-0.20).
光記錄媒體的反射率從上述初期反射率0.72降低反射 率變動寬度之20% (約0.10)所需之照射時間Α爲l〇nsec ，降低該反率變動寬度之80%左右（約0.42)所需之照射 時間B爲160nsec。從而，反射變動率平均T= (B—A)/A 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） _ 24 501128 A7 B7 五、發明説明（22) 15 在該光記錄媒體中，無法確實讀取所有的記錄資料。 此外，該光記錄媒體之上述（1)至（6)記錄遮罩之速度 偏差値雖顯示於以下表格，惟在全部的記錄遮罩中已知成 爲1 0 %以上，已知其値較上述比較例2 ( T = 11 )更加惡化 比較例4 與實施例1相同之方法製作光記錄媒體。 在此，記錄時之雷射光束能源設定爲1 IMw，此時的記 錄線速度爲4.8m/s，記錄之時脈頻率數設爲4MHz ( 250nsec )，記錄時之雷射照射時間分別設爲（1 ) lOOnsec、（ 2 ) 130nsec、（ 3) 160nsec、（ 4) 190nsec、（ 5 ) 220nsec 以及 (6 ) 250nsec 〇 該光記錄媒體的初期反射率爲72% (0.72)，使雷射在 300nsec以上照射時界限最低反射率成爲20% ( 0.20 )。從 而，反射率變動寬度爲0.52 (= 0.72-0.20 )。 ί 丨寸 1 光記錄媒體的反射率從上述初期反射率0.72降低反射 率變動寬度之20% (約0.10)所需之照射時間A爲lOOnsec ，降低該反率變動寬度之80%左右（約0.42)所需之照射 時間B爲25 0nsec。從而，反射變動率平均T= (B— A)/A =1.5。 在該光記錄媒體中，無法確實讀取所有的記錄資料。 此外，該光記錄媒體之上述（1 )至（6 )記錄遮罩之速度 -25- (請先閱讀背面之注意事項再填寫本頁) 本纸張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）The reflectance of the optical recording medium is reduced from the above-mentioned initial reflectance of 0.72 by 20% (approximately 0.10) of the reflectance variation width to an irradiation time A of 10 nsec, and the reflectance variation width is reduced by approximately 80% (approximately 0.42). The required irradiation time B is 160 nsec. Therefore, the average change rate of reflection T = (B—A) / A This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) _ 24 501128 A7 B7 V. Description of the invention (22) 15 In this optical recording medium It is impossible to read all the log data. In addition, although the speed deviation of the above-mentioned (1) to (6) recording masks of the optical recording medium is shown in the following table, it is known that it is more than 10% in all the recording masks. Comparative Example 2 (T = 11) was worsened. Comparative Example 4 An optical recording medium was produced in the same manner as in Example 1. Here, the energy of the laser beam during recording is set to 1 IMw, the linear velocity of the recording at this time is 4.8m / s, the number of clock frequencies during recording is set to 4MHz (250nsec), and the laser irradiation time during recording is set to (1) 100 nsec, (2) 130 nsec, (3) 160 nsec, (4) 190 nsec, (5) 220 nsec, and (6) 250 nsec. The initial reflectance of the optical recording medium was 72% (0.72), and the laser was at 300 nsec. The minimum reflectance at the time of the above irradiation is 20% (0.20). Therefore, the width of the reflectance variation is 0.52 (= 0.72-0.20). ί 丨 1 The reflectance of the optical recording medium from the above-mentioned initial reflectance of 0.72 to reduce the reflectance variation width by 20% (about 0.10) of the irradiation time A is 100nsec, reducing the reflectance variation width by about 80% (about 0.42 ) The required irradiation time B is 250 nsec. Therefore, the average reflection change rate T = (B—A) /A=1.5. In this optical recording medium, it is impossible to reliably read all the recorded data. In addition, the speed of the above (1) to (6) recording mask of the optical recording medium is -25- (Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CNS) Α4 specifications ( 210X297 mm)
V 501128V 501128
A B 五、發明説明（23) 偏差値雖顯示於以下表格’惟在全部的記錄遮罩中已知成 爲10%以上，已知其値較上述比較例1 ( T=丨·8)更加惡化 (請先閲讀背面之注意事項再填寫本頁) 〇 以上的結果顯示於表L。 【表1】 反射率變動平均Τ之値與已記錄之信號速度偏差値（％ 實施 實施 實施 比較 比較 比 較 比較 例1 例2 例3 例1 例2 例 3 例4 各 反 射 率 變 3.0 2.0 9.0 1.8 11.0 15, .0 1.5 速 動 平均T 度 雷 射 照 射 7.5 6.8 7.2 11.5 10.9 13. ,2 12.8 偏 時 間 (1) 差 雷 射 照 射 7.3 6.5 6.8 11.0 10.8 13. .1 12.6 値 時 間 (1 ) % 雷 射 照 射 7.2 6.3 6.9 10.8 10.5 12.8 12.3 時 間 (3 ) 雷 射 照 射 7.0 6.3 7.0 10.5 9.9 12.5 12.1 時 間 (4 ) 雷 射 照 射 6.6 6.3 7.4 10.8 9.8 12.6 12.5 時 間 (5 ) 雷 射 照 射 6.7 6.5 7.5 10.9 10.5 13.0 12.5 時 間 (6 ) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐〉 -26- 501128 A7 B7 五、發明説明（24) 發明之功效 根據本發明，應用於5階以上之新的多階記錄手法確 實可獲得可檢測資料之光記錄媒體。然而’由於其記錄@ 罩之長度可包含讀取雷射之聚光光束（光束腰部）之直徑 以下者，因此可大幅提昇資訊的記錄密度。 -27- (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標率（CNS ) A4規格（210X297公釐）AB V. Description of the invention (23) Although the deviation 显示 is shown in the following table, it is known to be more than 10% in all the recording masks. It is known that it is worse than the above Comparative Example 1 (T = 丨 · 8) ( (Please read the precautions on the back before filling out this page) 〇 The above results are shown in Table L. [Table 1] Deviation of reflectivity change average T and recorded signal speed deviation (% Implementation Implementation Comparison Comparison Comparative Example 1 Example 2 Example 3 Example 1 Example 2 Example 3 Example 4 Each reflectance change 3.0 2.0 9.0 1.8 11.0 15, .0 1.5 Rapid moving average T-degree laser exposure 7.5 6.8 7.2 11.5 10.9 13., 2 12.8 Offset time (1) Differential laser exposure 7.3 6.5 6.8 11.0 10.8 13. .1 12.6 Time (1)% of lightning Laser irradiation 7.2 6.3 6.9 10.8 10.5 12.8 12.3 Time (3) Laser irradiation 7.0 6.3 7.0 10.5 9.9 12.5 12.1 Time (4) Laser irradiation 6.6 6.3 7.4 10.8 9.8 12.6 12.5 Time (5) Laser irradiation 6.7 6.5 7.5 10.9 10.5 13.0 12.5 Time (6) This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) -26- 501128 A7 B7 V. Description of the invention (24) Effect of the invention According to the present invention, it is applied to new grade 5 or higher The multi-level recording method can indeed obtain a light recording medium with detectable data. However, 'because of the length of its recording @ cover can include reading The diameter of the laser's condensing beam (beam waist) is less than the diameter, which can greatly increase the recording density of information. -27- (Please read the precautions on the back before filling this page) This paper applies the Chinese national standard (CNS) ) A4 size (210X297 mm)