591639 A7 B7 五、發明説明（彳） 發明之詳細說明 技術領域 φ II (請先閲讀背面之注意事項再填寫本頁) 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sS錄媒體’以多階g己錄上述資料。 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，提案有由於可提 升線記錄密度，故利用雷射攝影者或將記錄層設爲多層之 光記錄方法。 經濟部智慈財產局員工消費合作社印製 在此，將藉由使用反射率之深度變動等多階記錄資料 之情況稱爲多階記錄。 發明所欲解決之課題 在記錄這種多階記錄中，在提昇記錄密度方面有縮短 多階記錄記錄密度之必要。 然而，使用於記錄讀取之雷射在聚光時，當光束直徑 比記錄遮罩小時，多階記錄變爲困難。 本紙張尺度適用中國國家標準（CNS ) A4規格（210Χ297公釐） -4- 591639 經濟部智慧財產局員工消費合作杜印製 A7 B7 五、發明説明（2) 例如’在特開平1 〇 - 1 3 4 3 5 3號公報中記載有 爲了進行多階之記錄以調整雷射光量之主旨。在此，光記 錄媒體爲色素膜或相變化膜時，因記錄部分與位記錄部分 反射的不同形成再生記號。從而，特開平 1 0 - 1 3 4 3 5 3號公報的方法中，未記錄階段與記錄 階段記錄有無之關係，與多階的記錄無關。更具體言之， 相變化膜或色素膜中未存在記錄與未記錄的中間狀態。 迄今’藉著以色素膜或相變化膜做爲光記錄媒體以調 整雷射光量’可出現多段之多階記錄的原因是，藉由雷射 能源的變化可變化主要之記錄遮罩寬度之緣故。 聚光光束一般形成......分布，記錄膜爲色素膜或相變 化膜時，已超過某閥値的部分進行記錄。藉著變化雷射能 源，變化可記錄之聚光光束的聚光尺寸，並改變記錄遮罩 的長度。 然而，爲了提昇記錄密度記錄遮罩長度變得比聚光光 束直徑短時，在調變雷射能源使遮罩寬度變化的手法中， 多階特別是指5階段以上的多階記錄變爲困難。亦即，因 變化記錄能源，使再生時之反射位準進行5階段以上之變 化變爲困難。 一般，聚光光束的直徑以Κλ/ΝΚ (K :定數、λ :雷射波長、N A :透鏡的開口數）表示。C D所利用之 拾訊器中；l = 780mm、NA二0 · 45，直徑約爲 1 . 6//m。此時，記錄遮罩長成爲1 · 6//m以下時變 化至今之雷射能源的方法其5階段以上的多階記錄變爲困 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇X：297公釐） ΙΦ---_---^1、玎------ (請先閱讀背面之注意事項再填寫本頁) -5- 591639 A7 B7 五、發明説明（3) 難。 又，例如特開平1 — 1 8 2 8 4 6號公報所揭示，將 記錄層之入射光量做爲數位量供給時，有記錄層之反應物 的吸光度做爲數位量而變化之光記錄媒體。 然而，該光記錄媒體對於雷射照射量（次數）之吸光 度變化的絕對値推測相當小，尙未達到實用化。 再者，如特開昭6 1 — 2 1 1 8 3 5號公報揭示有一 種照射至聚光光色材料的照射光之強度或是變化照射次數 而記錄於不同的任意階段之發光濃度狀態之光記錄方法。 然而，在該光記錄方法中照射雷射光讀取之際，有無 法進行5階段以上讀取發色濃度狀態之問題點。 本發明者發現一種即使記錄遮罩長比聚光光束直徑短 的條件下變化雷射照射時間亦可進行5階段以上之多階記 錄。再者亦發現做爲記錄膜的材料從伴隨雷射照射之溫度 上升之未記錄至記錄的變化陡急的相變化材料比變化緩和 的色素材料更合適。 本發明考慮上述之情事，目的在於提供一種利用一般 廣泛實用化的C D - R之光記錄媒體，進行多階之多階記 錄，可獲得良好的信號品質之光記錄媒體以及光記錄方法 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 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） Φ II (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消费合作社印製 -6- 591639 A7 B7 五、發明説明（4) 體確認可進行5階段之高密度多階記錄。 亦即，藉由以下的本發明可達成上述目的。 (請先閱讀背面之注意事項再填寫本頁) (1 ) 一種光記錄媒體，其特徵爲藉由照射雷射光於 記錄層形成記錄遮罩並記錄資訊，且，可讀取對該記錄遮 罩照射讀取雷射光並予以記錄之資訊之光記錄媒體，上述 記錄層規定爲與雷射光束和記錄層相對移動方向之任意長 度以及與此垂直方向的單位寬度，並於上述移動方向具有 連續設定之假想記錄單元，該假想記錄單元之上述記錄層 對應於雷射光.束的照射時間之.5階段以上的調變，可形成 大小不同的記錄遮罩，藉此相對於記錄遮罩的假想記錄單 元之面積比以及光透過率中至少一項，俾使可依據面積比 調變光反射率，並記錄資訊的5階段以上之多階記錄。 (2 )如第（1 )項之光記錄媒體，其中上述假想記 錄單元的單位長設定爲與藉由最大照射時間的雷射光束照 射所形成之記錄遮罩長度約相等。 經濟部智慧財產局員工消費合作社印製 (3 )如第（1 )或（2 )項之光記錄媒體，其中沿 著上述記錄層設有雷射光束導引用的槽，上述假想記錄單 元設定在上述槽內，且上述單位寬度與上述槽的寬度一致 0 (4 )如第（1 )至（3 )項中任一項之光記錄媒體 ，其中上述假想記錄單元之上述單位長度設爲低於上述讀 取雷射光束的光束腰部直徑。 (5 )如第（1 )至（4 )項中任一項之光記錄媒體 ，其中在上述記錄層的一部份對預先資訊進行多階記錄完 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇Χ 297公釐） ' '^ 591639 A7 B7 i、發明説明（5) 成。 (請先閲讀背面之注意事項再填寫本頁} (6 )如第（1 )至（5 )項中任一項之光記錄媒體 ’其中至少在上述假想記錄單元與多階記錄結束部分任一 方記錄有顯示多階降路媒體之特定資訊。 (7 )如第（1 )至（6 )項中任一項之光記錄媒體 ’其中沿著上述記錄層設有雷射光束導引用的槽，該槽中 一部份爲途切。 (8 )如第（1 )至（7 )項中任一項之光記錄媒體 ，其中上述記錄層爲有機色素所形成。 經濟部智慧財產局S工消費合作社印製 (9 ) 一種光記錄方法，其特徵係記錄層與雷射光束 的一方相對於另一方移動固定方向且對記錄層照射雷射光 束，藉由於記錄層形成記錄遮罩以記錄資訊之光記錄方法 ，於上述記錄層之上述移動方向假設假想記錄單元，在每 一假想記錄單元上5階段調變雷射光束的照射時間，改變 假想記錄單元內所形成之記錄遮罩大小，相對於假想記錄 單元之面積比以及記錄.遮罩的光透過率中至少一項，因應 上述雷射光調變依據面積比之該假想記錄單元全體的光反 射率，5階段以上多階記錄資訊。 (1 0 )如第（9 )項之光記錄媒體，其中僅因應將 上述記錄層之雷射光束直徑設爲一定時之照射時間，從記 錄遮罩的大小以及光透過率中至少調變大小的材料構成， 將雷射光束的光束直徑設爲一定進行照射。 在該發明中，記錄遮罩筆記錄光束直徑小時，不僅藉 著多階調整雷射能源亦可調整雷射照射時間，俾使反射率 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -8 - 591639 A7 B7 五、發明説明（6) (請先閱讀背面之注意事項再填寫本頁) 可進行多階控制。亦即，藉著在記錄能源設爲一定的狀態 下調變雷射照射時間，調變記錄遮罩的大小，藉由多階變 化一定區域內的記錄遮罩面積比之光反射率的位準，使得 多階之記錄成爲可能。 此外，在此所說之遮罩大小雖爲構成記錄層之材料’ 惟藉由雷射光束的照射分解變質，藉由其曲折率變化時或 其變化之厚度方向的大小變化光透過率時之其變化量之大 小0 再者，該效果再5階段以上的多階記錄時爲顯著。 亦即，若至4階段左右爲止，即使調變一般的雷射能 源之方法亦可進行多階記錄。然而，在進行5階段以上之 高密度多階記錄之際，控制雷射照射時間甚爲重要。 該記錄方法對於具有使用有機色素之記錄膜之光記錄 媒體尤其有用。 圖示之簡要說明 經濟部智慧財產局S工消费合作社印製 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 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。 第4圖係顯示將照射假想記錄單元之雷射光束設爲其 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9- 591639 A7 B7 五、發明説明（7) 他形狀時之略示斜視圖。 (請先閲讀背面之注意事項再填寫本頁) 元件圖號說明 1 0光記錄媒體 1 2記錄層 1 4基板 1 6槽 1 8反射膜 2 0保護層 3 0光記錄裝置 3 2主軸 3 4碟片 3 6雷射 3 8雷射驅動器 4 0假想記錄單元 4 2記錄光學素 經濟部智慧財產局員工消費合作社印製 4 2 A接物鏡 4 2 B半透鏡 4 2 C光束整形三棱鏡 4 4聚焦伺服電路 4 6饋送伺服電路 48A至48G、49、54 記錄遮罩 5 2坑洞 5 6槽中斷部 本紙張尺度適用中國國家標準（CNS ) A4規格（210Χ297公釐） -10- 591639 A7 B7 五、發明説明（8) D光束徑 (請先閲讀背面之注意事項再填寫本頁) 發明之實施形態 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1 0係於記錄 層1 2使用色素之C D - R，係形成包括以下之構件：透 明基材組成之基板1 4、覆蓋形成於該基板1 4 一側之面 (第1圖上面）之雷射光束導引用槽1 6並加以塗布之色 素所形成的上述記錄層1 2、藉由濺鍍法等在該記錄層 1 2上側形成之金或銀等反射膜1 8以及覆蓋該反射膜 1 8之保護層2 0。 用於上述記錄層1 2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、柰酞 菁以及偶氮基色素等有機色素。 上述光記錄媒體1 0之多階記錄係透過第2圖所示之 光記錄裝置3 0進行。 經濟部智慧財產局員工消費合作社印製 該光記錄裝置3 0爲CD - R記錄器，透過主軸伺服 器3 1並藉由主軸監視器3 2以線速度固定之條件旋轉驅 動光記錄媒體1 0，藉由來自雷射3 6之雷射光束於光記 錄媒體1 0 (碟片）如上述所形成之記錄層1 2記錄資訊 者。 上述雷射3 6因應應該記錄的資訊，俾使藉由雷射驅 動器3 8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）4 0之每一個雷射光束照 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇Χ29<7公釐） -11 - 591639 A7 ______ B7 五、發明説明（9) 射時間。 (請先閲讀背面之注意事項再填寫本頁) 第2圖之圖號4 2係包括接物鏡4 2 A以及半透鏡 4 2 B之記錄光學系統。接物鏡4 2 a係藉由聚焦追蹤伺 服器4 4進行聚焦追縱控制，俾使雷射光束聚光於記錄層 1 2。又，接物鏡4 2A與半透鏡4 2 B藉由饋送伺服器 4 6與碟片1 0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。 上述主軸伺服器3 1、雷射驅動器3 8、聚焦追蹤伺 服器4 4以及饋送伺服器4 6係透過控制裝置5 0,加以控 制。應該記錄於記錄層1 2之資料輸入至控制裝置5〇。 繼之’就上述假想記錄單元4 0以及記錄於該假想記 錄單元4 0之記錄遮罩加以說明。 該假想記錄單元係規定爲光記錄媒體之徑向單位寬度 以及旋轉方向之單位長度。單位寬度設爲雷射光束之光束 腰部直徑以下，碟片1 0的追蹤間距或槽寬度等可任意選 擇寬度。 經濟部智慧財產局Μ工消費合作社印製 該實施形態之假想記錄單元4 0如第1圖所示，在上 述槽1 6內於碟片1 0之旋轉方向亦即圓周方向比光束直 徑（光束腰部直徑）短之長度（圓周方向長度），且寬度 規定與槽1 6相等，而連續想定於圓周方向者，藉由在每 一個假想記錄單元4 0上照射Y，俾使因應應記錄之資訊 將形成第3圖所示之記錄遮罩4 8A至4 8 G。 在此，從上述雷射3 6射出之雷射光束之記錄層1 2 位置之光束直徑D雖比上述假想記錄單元4 0大’惟藉由 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -12- 591639 A7 _____B7_ 五、發明説明（^ 選擇記錄層1 2的材料，因應雷射照射時間在雷射光束的 中心部可形成直徑不同的記錄遮罩4 8 A至4 8 G (由於 雷射光束爲圓形，惟邊旋轉光記錄媒體邊照射雷射光束， 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1 2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1 2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4 8 A至4 8 G。 此時，記錄遮罩4 8 A至4 8 G的大小設定成使照射 假想記錄單元4 0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4 8 G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 4 8A至4 8 G自身的光透過率相對於各記錄遮罩4 8A 至4 8 G之假想記錄單元4 0而設定。 記錄遮罩4 8 A至4 8 G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1 2之材料，其曲折率變化 之情況因記錄層1 2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。 上述實施形態雖將光記錄媒體1 0設爲C D — R亦即 碟片者，惟本發明並分非限定於此，一般亦適用於實用化 之種種構造之碟片以及光記錄媒體者。 本紙張尺度適用中國國家榡準（CNS ) A4規格（210X297公釐） " ' -13- φ II (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部智葸財產局員工消費合作社印製 591639 A7 B7 五、發明説明（」 (請先閲讀背面之注意事項再填寫本頁) 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，對應於雷射光束之照射時間 若可形成5階段以上不同的記錄遮罩者’亦可爲除上述之 外的有機色素。 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。 再者，上述實施形態例雖就未記錄資料等資訊之光記 錄媒體1 〇者，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3 0形成記錄遮罩之際 設定於記錄層1 2上之假想記錄單元4 0之尺寸並非限定 於實施形態之例，可將雷射光束之光束腰部直徑以下之任 意長度。再者，不具有槽1 6之光記錄媒體中，爲可任意 設定假想記錄單元4 0之尺寸，惟雷射光束之最長照射時 間時之照射能源，亦可將假想記錄單元4 0設定與超越對 記錄層1 2給與變化之閥値時所形成之記錄遮罩等長。 經濟部智慧財產局員工消費合作社印製 又，上述雷射光束在記錄層1 2的位置形成圓形，惟 如第4圖所示，例如除了使用接物鏡4 2 A之外再加上光 束整形三稜鏡4 2 C，光束形狀在光記錄媒體1 〇的饋送 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4 9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1 0中，具有如第1圖中圖號 5 2所示，藉由預先具有信號變調之段數之一部份之數量 本紙張尺度適财關家標準（CNS ) A4規格（210X297公釐） ' ' -- -14 - 591639 Α7 Β7 五、發明説明（d (請先閲讀背面之注意事項再填寫本頁) 的反射率相異的複數凹洞，如前所述，對該光記錄體之一 部份預先進行多階記錄，在上述複數凹洞5 2以及/或多 階記錄結束部分之記錄遮罩5 4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能源之資訊等特定資 訊，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射光束之能源 段數，故可更確實進行多階記錄再生。或是如第1圖之圖 號5 6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 以下顯示說明本發明之實施例。 經濟部智慧財產局員工消費合作社印製 後述之實施例1至3以及比較例1的條件如下所述。 使用色素於記錄層12之CD-R做爲光記錄媒體 1 0，並進行多階記錄之實驗。 於C D - R之記錄評價所使用的脈衝製D D U (使用 雷射波長=7 8 4 nm)進行連接高頻信號產生器。 再生評價亦在D D U上連接數位示波器。 多階記錄以4 . 8 / s e c之固定線速度旋轉碟片， 以4 Μ Η z之時脈頻率數6階段變化雷射光束之照射時間 並加以記錄並進行記錄，藉由以相同定線速度素旋轉製攝 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X29*7公釐) '~~' -15- 591639 A7 B7 五、發明説明（d 1 M w之雷射光束檢測其反射反應光量之差進行再生。 (請先閲讀背面之注意事項再填寫本頁} 此時，記錄膜上之記錄雷射光束之直徑成爲1 · 6 //m。假想記錄單元4 0的尺寸寬度與槽相同之0 · 35 //m，長度係在全長4 · 8m之槽假定4 0 0萬之假想言己 錄單元，設 4 . 8/4Μ=1 · 2//m。 實施例1 將喹啉藍色素溶解於氟化醇以調製2 %的有機色素記 錄層形成用塗布液，藉由射出成型於表面以旋轉數2 0 0 r pm至5 0 0 0 r pm旋轉該塗布液以形成螺旋狀之預 槽（軌道螺距：8/zm、預槽寬度：〇 . 35#m、預槽 深度：0 · 18//m)之聚氮酸脂（帝人化成（株）製： pan-rightAD5 503 )所組成之直徑 1 2 0 m m、1 · 2 m m 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2 0 0 n m之有機色素 記錄層。 經濟部智慧財產局員工消費合作社印製 此外，在此所使用之光透過性基板係該光記錄媒體使 用於多階記錄之判斷信號以及有關雷射光束之資訊信號使 用預先記錄者。 繼之，藉由濺鍍法在有機色素記錄層上形成厚度約 1 0 0 n m之銀的光反射層。再者，藉由濺鍍法以旋轉數 300 r pm至4000 r pm在該光反射層上旋轉塗布 紫外線硬化性樹脂（大日本I N N K I化學工業（株）： S D 3 1 8 )並加以變化。於塗布後，透過高壓水銀燈自 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -16- 591639 A7 ___ B7 五、發明説明（彳j 塗膜上方照射紫外線以形成層後1 0 // m之保護層。 使用如此獲得之光記錄媒體試驗本發明之多階記錄。 (請先閲讀背面之注意事項再填寫本頁) 記錄時之雷射光束的照射時間分別以（1 ) 5 〇 nsec、（2)8〇nsec、(3) llOnsec 、（4) 140nsec、（5) 170nsec 以及（ 6 ) 2 0 0 n s e c之6階段進行記錄。記錄能源以1 4 m W進行。 記錄時以分別單一的照射時間沿碟片1周進行記錄。 在進行這種記錄時，可進6階段的多階記錄。又，該 光記錄媒體可檢測確認顯示使用於多階記錄之判斷信號以 及有關雷射光束能源之資訊的信號。 此外，將此時所記錄的信號之速度偏差値取入Le Croy 製數位示波器L C - 5 3 4 E L進行測定，可獲得良好的 結果。 速度偏差値係依存於藉由對有機色素記錄膜進行雷射 光束照射而形成之記錄遮罩的形狀，雖速度偏差値小，惟 可確實形成上述記錄遮罩。 經濟部智慧財產局自(工消費合作社印製 這次所用的速度偏差値之測定機中，考慮藉由習知之 2維記錄再生方法加以記錄時，可判斷若速度偏差値在 1 0 %以下則可進行良好的記錄。 實施例2 除了使用酞菁色素之外，與實施例一樣製作光記錄媒 體，使用入此所獲得的光記錄媒體嘗試與實施例1相同的 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 一 - -17- 591639 A7 B7 五、發明説明（^ 多階記錄。結果，可進行多階記錄。又，該光記錄媒體可 檢測確認顯示使用於多階記錄之判斷信號以及有關雷射光 束的能源之信號。 再者，以同樣的方式測定此時所記錄的信號之速度偏 差値，可獲得良好的結果。 實施例3 除了使用偶氮基之外，與實施例一樣製作光記錄媒體 ，使用入此所獲得的光記錄媒體嘗試與實施例1相同的多 階記錄。結果，可進行多階記錄。又，該光記錄媒體可檢 測確認顯示使用於多階記錄之判斷信號以及有關雷射光束 的能源之信號。 再者，以同樣的方式測定此時所記錄的信號之速度偏 差値，可獲得良好的結果。 比較例1 使用相變化媒體亦即C D - R做爲光記錄媒體，並嘗 試與實施例1相同的多階記錄。記錄能源爲1 1 m W。 再者，以同樣的方式測定此時所記錄的信號之速度偏 差値，已知各信號之速度偏差値變差。 以上的結果顯示於表1。 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇χ297公釐） φ II (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -18- 591639591639 A7 B7 V. Description of the invention (彳) Detailed description of the invention Technical Field φ II (Please read the notes on the back before filling out this page) The present invention relates to an optical recording medium and optical recording method. Information, the laser beam irradiation time is switched in multiple steps and irradiated to the optical sS recording medium, and the above information is recorded in multiple steps. 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 multiple steps. 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 plural data can be recorded in the depth direction, a signal amount of a fixed length can be increased. Therefore, there has been proposed an optical recording method using a laser photographer or a multi-layered recording layer because the line recording density can be increased. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Here, the case of using multi-level recording data such as the depth change of reflectance is referred to as multi-level recording. Problems to be Solved by the Invention In such a multi-level recording, it is necessary to shorten the recording density of the multi-level recording in order to increase the recording density. However, when the laser used for recording and reading is focused, when the beam diameter is smaller than the recording mask, multi-level recording becomes difficult. This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -4- 591639 Intellectual Property Bureau of the Ministry of Economic Affairs, consumer cooperation Du printed A7 B7 V. Description of the invention (2) For example, 'in kaiping 1 〇-1 The purpose of adjusting the amount of laser light for performing multi-level recording is described in JP 3 4 3 5 3. Here, when the optical recording medium is a pigment film or a phase change film, a reproduction mark is formed due to the difference in reflection between the recording portion and the bit recording portion. Therefore, in the method of Japanese Patent Application Laid-Open No. 10-1 3 4 3 5 3, the relationship between the unrecorded stage and the presence or absence of recording in the recording stage is not related to the multi-stage recording. More specifically, there is no intermediate state between recorded and unrecorded phase change films or pigment films. The reason “multi-stage recording can be performed by adjusting the amount of laser light by using a pigment film or a phase change film as an optical recording medium” is that the main recording mask width can be changed by the change of the laser energy. . The condensed light beam generally forms a ... distribution. When the recording film is a pigment film or a phase change film, the portion that exceeds a certain valve is recorded. By changing the laser energy, the condensing size of the recordable condensing beam is changed, and the length of the recording mask is changed. However, in order to increase the recording density, when the length of the mask becomes shorter than the diameter of the condensing beam, in the method of adjusting the laser energy to change the mask width, multi-level, especially multi-level recording with 5 or more stages becomes difficult. . That is, it is difficult to change the reflection level at the time of reproduction by more than 5 steps due to the change in the recording energy. Generally, the diameter of the condensing beam is represented by κλ / ΝΚ (K: fixed number, λ: laser wavelength, N A: number of lens openings). Among the pickups used by CD, l = 780mm, NA = 0.45, and the diameter is about 1.6 // m. At this time, the method of recording laser energy that has changed until the mask length becomes less than 1/6 // m, and the multi-level recording of more than 5 stages becomes difficult. The paper size applies the Chinese National Standard (CNS) A4 standard (21〇). X: 297 mm) ΙΦ ---_--- ^ 1, 玎 ------ (Please read the precautions on the back before filling this page) -5- 591639 A7 B7 V. Description of the invention (3) difficult. Further, for example, Japanese Patent Application Laid-Open No. Hei 1-1 2 8 4 6 discloses that when the incident light amount of the recording layer is supplied as a digital quantity, the absorbance of the reactant having the recording layer is changed as a digital quantity of the optical recording medium. However, the absolute change of the absorbance of the laser irradiation amount (number of times) of this optical recording medium is estimated to be relatively small, and it has not yet reached practical use. Furthermore, for example, Japanese Patent Application Laid-Open No. 6 1-2 1 1 8 3 5 discloses a method of recording the light emission concentration state at different arbitrary stages by varying the intensity of the irradiation light irradiated onto the light-concentrating color material or changing the number of irradiations. Optical recording method. However, in this optical recording method, when laser light is irradiated for reading, there is a problem in that it is impossible to read the color density state in five or more steps. The present inventors have found that a multi-level recording of 5 or more steps can be performed even if the laser irradiation time is changed under the condition that the recording mask length is shorter than the condensing beam diameter. Furthermore, it has been found that the material used as the recording film is more suitable for the phase-change material whose abrupt change from unrecorded to recorded accompanied by the temperature rise due to laser irradiation is more suitable than the pigment material which has a mild change. The present invention takes the above circumstances into consideration, and aims to provide an optical recording medium and an optical recording method for performing multi-level and multi-level recording by using a CD-R optical recording medium which is generally widely practical, and can obtain good signal quality. Solution to the Problem The present invention conducts precise research on the optical recording medium repeatedly, and finds here a multi-level recording recording method. With this recording method, the Chinese National Standard (CNS) A4 specification is applied to the paper size of the optical recording medium ( 210X297 mm) Φ II (Please read the precautions on the back before filling this page) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-6- 591639 A7 B7 V. Description of the invention (4) Physical confirmation can be performed in 5 stages. High-density multilevel recording. That is, the above-mentioned object can be achieved by the following invention. (Please read the precautions on the back before filling this page) (1) An optical recording medium characterized by forming a recording mask and recording information by irradiating laser light on the recording layer, and the recording mask can be read An optical recording medium irradiated with information that reads laser light and records the information. The above-mentioned recording layer is defined as an arbitrary length in the direction of relative movement with the laser beam and the recording layer and a unit width in the direction perpendicular thereto, and has a continuous setting in the above-mentioned movement direction. An imaginary recording unit, the above-mentioned recording layer of the imaginary recording unit corresponds to the modulation of more than 5 stages of the irradiation time of the laser light and the beam, and can form recording masks of different sizes, thereby comparing with the imaginary recording of the recording mask. At least one of the area ratio of the unit and the light transmittance can be used to adjust the light reflectance according to the area ratio and record the information in multiple stages of 5 or more stages. (2) The optical recording medium according to item (1), wherein the unit length of the above-mentioned imaginary recording unit is set to be approximately equal to the length of the recording mask formed by the laser beam irradiation with the maximum irradiation time. Printed by (3) an optical recording medium as described in item (1) or (2) in the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, in which a slot for guiding the laser beam is provided along the recording layer, and the above-mentioned imaginary recording unit is set at In the above slot, and the unit width is the same as the width of the slot 0 (4) An optical recording medium as in any one of items (1) to (3), wherein the unit length of the imaginary recording unit is set to be less than The above-mentioned reading of the beam waist diameter of the laser beam. (5) The optical recording medium according to any one of items (1) to (4), in which the advance information is recorded in multiple steps in a part of the above-mentioned recording layer. The paper standard is applicable to the Chinese National Standard (CNS) A4 Specifications (21〇 × 297mm) '' ^ 591639 A7 B7 i, invention description (5). (Please read the precautions on the back before filling this page} (6) The optical recording medium according to any one of items (1) to (5), where at least one of the above imaginary recording unit and the end of the multi-level recording (7) The optical recording medium according to any one of the items (1) to (6) is recorded therein, wherein a groove for quoting a laser beam is provided along the recording layer, (8) The optical recording medium according to any one of the items (1) to (7), in which the recording layer is formed of organic pigments. Consumption of Industrial Workers, Bureau of Intellectual Property, Ministry of Economic Affairs Printed by a cooperative (9) An optical recording method, characterized in that one of the recording layer and the laser beam moves a fixed direction relative to the other and irradiates the recording beam with the laser beam, and the recording layer forms a recording mask to record information. In the optical recording method, a hypothetical recording unit is assumed in the moving direction of the recording layer. In each hypothetical recording unit, the irradiation time of the laser beam is adjusted in 5 steps to change the size of the recording mask formed in the hypothetical recording unit. Hypothetical At least one of the area ratio of the cell and the light transmittance of the recording. Mask, according to the above-mentioned laser light modulation based on the light reflectance of the imaginary recording unit based on the area ratio, multi-level recording information of more than 5 stages. (1 0) For example, according to the optical recording medium of item (9), only the size of the recording mask and the light transmittance are adjusted from the size of the recording mask and the light transmittance only according to the irradiation time when the laser beam diameter of the recording layer is fixed. The beam diameter of the laser beam is set to be constant. In this invention, the recording mask pen records a small beam diameter, which not only adjusts the laser energy by multiple steps, but also adjusts the laser irradiation time to make the reflectivity of this paper. The scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -8-591639 A7 B7 V. Description of the invention (6) (Please read the notes on the back before filling this page) Multi-level control is possible. That is, By adjusting the laser irradiation time with the recording energy set to a certain state, the size of the recording mask is adjusted, and the light reflectance of the recording mask area ratio in a certain area is changed in multiple steps. In addition, although the size of the mask mentioned here is the material constituting the recording layer, it is decomposed and deteriorated by the irradiation of the laser beam, and when its tortuosity changes or its changes. The magnitude of the change in thickness in the thickness direction is 0 when the light transmittance is changed. Furthermore, the effect is significant in multi-level recordings of more than 5 stages. That is, if the laser is adjusted to about 4 stages, the average laser is adjusted. The energy method can also perform multi-level recording. However, when performing high-density multi-level recording of more than 5 steps, it is important to control the laser irradiation time. This recording method is for an optical recording medium having a recording film using an organic pigment It is especially useful. Brief description of the figure Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Industrial and Commercial Cooperatives. Figure 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 schematic diagram showing a virtual recording unit and the relationship between its light reflectance and the recording mask when a recording mask is formed on the recording layer using the recording device. Figure 4 shows that the laser beam irradiating the imaginary recording unit is set to its paper size. The Chinese national standard (CNS) A4 specification (210X297 mm) is applied. -9-591639 A7 B7 V. Description of the invention (7) Other shapes It is shown obliquely. (Please read the precautions on the back before filling this page) Description of component drawing number 1 0 Optical recording medium 1 2 Recording layer 1 4 Substrate 1 6 Slot 1 8 Reflective film 2 0 Protective layer 3 0 Optical recording device 3 2 Spindle 3 4 Disc 3 6 Laser 3 8 Laser Drive 4 0 Imaginary Recording Unit 4 2 Recording Optical Printed by Employee Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economy 4 2 A Objective Lens 4 2 B Half Lens 4 2 C Beam Shaping Triangular Prism 4 4 Focus Servo circuit 4 6 Feed servo circuit 48A to 48G, 49, 54 Recording mask 5 2 Pit 5 6 Slot interruption This paper size is applicable to Chinese National Standard (CNS) A4 specification (210 × 297 mm) -10- 591639 A7 B7 5 8. Description of the invention (8) D beam diameter (please read the precautions on the back before filling this page) Embodiments of the invention Hereinafter, the embodiments of the invention will be described in detail with reference to the drawings. An optical recording medium 1 0 according to an embodiment of the present invention is a recording layer 12 and a CD-R using a pigment is formed to include a substrate including a transparent substrate 1 and a cover 1 4 The above-mentioned recording layer 1 formed by a laser beam guided to the groove 16 and coated with a pigment on the side surface (top of FIG. 1) 2. Gold or silver formed on the upper side of the recording layer 12 by sputtering or the like The reflective film 18 and the protective layer 20 covering the reflective film 18 are formed. The pigments used for the recording layer 12 are organic pigments such as quinoline blue, cyanine, methine-based pigments, and dielectrics, thiophenol metal salts, phthalocyanine pigments, fluorene phthalocyanines, and azo-based pigments. . The multi-level recording of the optical recording medium 10 is performed by the optical recording device 30 shown in FIG. 2. The optical recording device 30 printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is a CD-R recorder, and the optical recording medium 1 is rotationally driven by the spindle server 3 1 and the spindle monitor 32 at a fixed line speed. The information is recorded by the laser beam from the laser 36 on the optical recording medium 10 (disc) in the recording layer 12 formed as described above. In response to the information to be recorded, the laser 36 controls, for example, the number of laser pulses by the laser driver 38, that is, each of the imaginary recording units shown in FIG. 1 and FIG. A laser beam conforms to the Chinese National Standard (CNS) A4 specification (21〇 × 29 < 7 mm) according to the paper size. -11-591639 A7 ______ B7 5. Description of the invention (9) Radiation time. (Please read the precautions on the back before filling this page.) Figure 2 in Figure 2 is a recording optical system that includes an objective lens 4 2 A and a half lens 4 2 B. The objective lens 4 2 a is controlled by the focus tracking server 44 to focus the laser beam on the recording layer 12. The objective lens 4 2A and the half lens 4 2 B are rotated in synchronization with the disc 10 by the feed server 46 and are moved from the inner peripheral side to the outer peripheral side at a predetermined speed. The above-mentioned spindle server 31, laser driver 38, focus tracking server 44, and feed server 46 are controlled by the control device 50. The data to be recorded in the recording layer 12 is input to the control device 50. Next, the above-mentioned imaginary recording unit 40 and a recording mask recorded in the imaginary recording unit 40 will be described. The imaginary recording unit is defined as a radial unit width and a unit length in the rotation direction of the optical recording medium. The unit width is set to the beam diameter of the laser beam. The width of the disc 10 can be arbitrarily selected, such as the tracking pitch or groove width. The imaginary recording unit 40 of this embodiment is printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and the Industrial Cooperative Cooperative. As shown in FIG. 1, the rotation direction of the disc 10 in the above-mentioned groove 16, that is, the circumferential direction is greater than the beam diameter (beam Waist diameter) short length (length in the circumferential direction), and the width is specified to be equal to the groove 16, and those who continuously want to be set in the circumferential direction, by irradiating Y on each imaginary recording unit 40, to respond to the recorded information The recording masks 4 8A to 4 8 G shown in FIG. 3 will be formed. Here, although the beam diameter D at the position of the recording layer 12 of the laser beam emitted from the above-mentioned laser 36 is larger than that of the above-mentioned imaginary recording unit 40 ', the Chinese National Standard (CNS) A4 specification (210 × 297) applies to this paper size. Mm) -12- 591639 A7 _____B7_ V. Description of the invention (^ Select the material of the recording layer 12 to form a recording mask with different diameters at the center of the laser beam according to the laser irradiation time 4 8 A to 4 8 G (Because the laser beam is circular, but the rotating laser recording medium illuminates the laser beam, the recording mask becomes oblong in accordance with the irradiation time.) This is because the focused laser beam is generally formed ..... .Distribution, but on the recording layer 12, since the laser beam irradiation time is only recorded in a part that exceeds a certain valve, the change can be recorded in the recording layer 12 by changing the laser beam irradiation time. The condensing size of the light beam can be used to form, for example, the 7-stage recording masks 4 8 A to 4 8 G as shown in Fig. 3. At this time, the size of the recording masks 4 8 A to 4 8 G is set to make the irradiation virtual. Reverse when laser beam read by recording unit 40 The light reflectance of the emitted light becomes 7. The light reflectance is smaller as the recording mask becomes larger, and becomes the largest on the imaginary recording unit where the recording mask is not formed, and on the imaginary recording unit which forms the recording mask 4 8 G. More specifically, the above-mentioned light reflectance is an imaginary recording unit 4 considering the area ratio and the light transmittance of the recording masks 4 8A to 4 8 G relative to each of the recording masks 4 8A to 4 8 G. 0. The recording masks 4 8 A to 4 8 G have their own light transmittance which is decomposed and degraded by the laser beam. The material that constitutes the recording layer 12 is changed. The amount of change varies. If the light transmittance of the formed recording mask portion is 0, the above steps may not be considered. Although the above-mentioned embodiment sets the optical recording medium 10 to CD-R, that is, a disc, the present invention It is not limited to this, and it is generally suitable for practical use of various structures of discs and optical recording media. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) " '-13- φ II (Please read the note on the back first Please fill in this page for further information.) Order printed by the Ministry of Economic Affairs and the Intellectual Property Bureau Employee Consumption Cooperative 591639 A7 B7 V. Invention Description ("(Please read the precautions on the back before filling this page). Also, in the above embodiment, the recording layer 1 2 Although organic pigments are used, the present invention is not limited to this, and those corresponding to the irradiation time of the laser beam if it can form 5 or more different recording masks' may also be organic pigments other than the above. When using the above-mentioned organic pigment, corresponding to the irradiation time of the laser beam in more than 5 stages, the size of the change recording mask can be reliably recorded. In addition, although the above-mentioned embodiment is an optical recording medium 10 in which information such as data is not recorded, the present invention is not limited to this, and is also applicable to an optical recording medium with multi-level recording of 5 stages or more. Furthermore, the size of the virtual recording unit 40 set on the recording layer 12 when the recording mask is formed by the optical recording device 30 is not limited to the example of the embodiment, and the beam waist diameter of the laser beam can be set. Any of the following lengths. Furthermore, in the optical recording medium without the slot 16, the size of the imaginary recording unit 40 can be arbitrarily set, but the irradiation energy at the maximum irradiation time of the laser beam can also be set and surpassed by the imaginary recording unit 40. The recording mask formed when the recording layer 12 is given a varying valve is the same length. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the above laser beam forms a circle at the position of the recording layer 12, but as shown in Figure 4, for example, in addition to the use of an objective lens 4 2 A, beam shaping is added. In the case of 4 2 C, the beam shape is short in the feeding direction of the optical recording medium 10, so that a long oval shape or a line shape is formed in a direction perpendicular to this. At this time, since the recording mask 49 is shortened, the virtual recording unit can be made shorter. That is, the recording density can be increased. In addition, the optical recording medium 10 has a number of segments as shown in FIG. 5 in FIG. A4 specification (210X297mm) ''--14-591639 Α7 Β7 V. Description of the invention (d (please read the precautions on the back before filling in this page) the plural recesses with different reflectances, as described above , Performing multi-level recording on a part of the optical recording body in advance, and individually identifying the information of the optical recording medium in the plurality of recesses 5 2 and / or the recording mask 5 4 at the end of the multi-level recording; The information of the optical recording medium for the high-level recording is used to determine the specific information such as the information of the energy of the laser beam of the optical recording medium. The specific information is read during the reproduction and / or recording of the optical recording medium. Recognizing optical recording media for multi-level recording, and since the individual identification is performed, the number of energy segments of the laser beam can be determined according to the number of pit segments recorded in advance, so multi-level recording and reproduction can be performed more reliably. The picture number is shown in figure 5 6 even if The same effect can also be obtained by cutting a part of the middle end of the laser beam guide groove in the middle of the design. The above methods can be used alone or in combination. Examples The following shows the embodiments of the present invention. The wisdom of the Ministry of Economic Affairs The conditions for printing of Examples 1 to 3 and Comparative Example 1 described later by the employee bureau of the property bureau are as follows. A CD-R using a pigment on the recording layer 12 was used as the optical recording medium 10, and a multi-level recording experiment was performed. The pulsed DDU (using laser wavelength = 7 8 4 nm) used for CD-R recording evaluation was connected to a high-frequency signal generator. The reproduction evaluation was also connected to a digital oscilloscope. Multi-level recording was performed at 4.8 / Rotate the disc at a fixed linear speed of sec, and change the irradiation time of the laser beam at 6 steps of the clock frequency of 4 MHz. Record and record it. Rotate the film at the same linear velocity. China National Standard (CNS) Α4 specification (210X29 * 7mm) '~~' -15- 591639 A7 B7 V. Description of the invention (d 1 Mw laser beam detects the difference in the amount of reflected reflected light and reproduces it (please Read the back first Please note this page again} At this time, the diameter of the recording laser beam on the recording film becomes 1 · 6 // m. The size and width of the imaginary recording unit 40 is the same as the groove 0 · 35 // m, and the length is Assuming a total of 4 million hypothetical recorded units in a slot with a length of 4 · 8m, set 4.8 / 4M = 1 · 2 // m. Example 1 A quinoline blue pigment was dissolved in a fluorinated alcohol to prepare 2% The coating liquid for forming an organic dye recording layer is formed by injection molding on the surface, and the coating liquid is rotated at a rotation number of 2 0 0 r pm to 5 0 0 0 r pm to form a spiral pregroove (orbital pitch: 8 / zm, Pre-groove width: 0.35 # m, pre-groove depth: 0 · 18 // m) Polyurethane (made by Teijin Kasei Co., Ltd .: pan-rightAD5 503) with a diameter of 120 mm, 1 · A 2 mm-thick light-transmitting substrate has a pre-groove side surface and is coated by a spin coating method to form an organic pigment recording layer with a thickness of about 200 nm from the bottom of the pre-groove. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In addition, the light-transmitting substrate used here is a pre-recorder for the optical recording medium using judgment signals for multi-level recording and information signals related to laser beams. Next, a light reflecting layer of silver having a thickness of about 100 nm was formed on the organic dye recording layer by a sputtering method. Furthermore, the light-reflective layer was spin-coated by a sputtering method at a rotation number of 300 r pm to 4000 r pm (Da Nippon I N N K I Chemical Industry Co., Ltd .: S D 3 1 8) and changed. After coating, apply Chinese National Standard (CNS) A4 specification (210X297 mm) from the paper size through high-pressure mercury lamp. -16- 591639 A7 ___ B7 V. Description of the invention (彳 j UV light is irradiated above the coating film to form a layer. 1 0 // The protective layer of m. Use the optical recording medium thus obtained to test the multi-level recording of the present invention. (Please read the precautions on the back before filling this page) The irradiation time of the laser beam during recording is (1) 5 〇nsec, (2) 80nsec, (3) llOnsec, (4) 140nsec, (5) 170nsec, and (6) 2 00 nsec are recorded in 6 stages. Recording energy is performed at 14 mW. Recording is performed at 14 mW. A single exposure time is recorded along the disc for one week. During this recording, multi-level recording can be performed in 6 stages. In addition, the optical recording medium can detect and display the judgment signal used for multi-level recording and related lightning. The signal of the information of the beam energy. In addition, the speed deviation of the signal recorded at this time is taken into the Le Croy digital oscilloscope LC-5 3 4 EL and measured, and good results can be obtained. The speed deviation does not depend on borrowing The shape of the recording mask formed by irradiating the organic pigment recording film with a laser beam, although the speed deviation is small, can form the recording mask as described above. In the speed deviation measurement machine, when recording is performed by the conventional two-dimensional recording / reproducing method, it can be judged that good recording can be performed if the speed deviation 値 is less than 10%. Example 2 In addition to using a phthalocyanine pigment The optical recording medium was made in the same manner as in the embodiment. The optical recording medium obtained here was used to try the same paper size as in Example 1. The Chinese paper standard (CNS) A4 specification (210X297 mm) was applied.--17- 591639 A7 B7 V. Description of the invention (^ Multi-level recording. As a result, multi-level recording can be performed. In addition, the optical recording medium can detect and display a judgment signal used for multi-level recording and a signal related to the energy of the laser beam. Furthermore, In the same way, the speed deviation 値 of the signal recorded at this time is measured, and good results can be obtained. Example 3 An optical recording medium was produced as in the example, and the same multi-level recording as in Example 1 was tried using the optical recording medium obtained here. As a result, multi-level recording can be performed. Furthermore, the optical recording medium can be detected and confirmed to be used for multi-level recording. The judgment signal and the energy signal of the laser beam. Furthermore, the speed deviation 速度 of the signal recorded at this time was measured in the same way, and good results were obtained. Comparative Example 1 Using a phase change medium, which is CD-R As an optical recording medium, the same multi-level recording as in Example 1 was tried. The recording energy was 11 mW. Furthermore, the speed deviation 値 of the signals recorded at this time is measured in the same manner, and it is known that the speed deviation 各 of each signal becomes worse. The above results are shown in Table 1. This paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) φ II (Please read the precautions on the back before filling out this page) Order Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs Employee Cooperatives -18- 591639
7 B 五、發明説明（ 【表 所使用的色素與所記錄信號的速度偏差値（％ 記錄膜 實施例1 喹琳藍 實施例2 酞菁 實施例3 偶氮基 比較例1 相變化膜 各 雷射照射時間（1) 7.5 7.7 7.1 12.4 速 雷射照射時間（2) 7.3 7.8 7.4 12.0 度 雷射照射時間（3) 7.2 7.7 7.8 11.0 偏 雷射照射時間（4) 7.0 7.6 8.2 12.1 差 雷射照射時間（5) 6.6 7.9 8.4 12.5 値 雷射照射時間（6) 6.7 8.1 8.4 14.5 (請先閲讀背面之注意事項再填寫本頁) 發明之功效 具有色素記錄層的光記錄媒體將雷射光素之照攝時間 改變5次並進行照射，藉由對提供記錄之資料進行多階記 錄之記錄方法，在有機色素記錄層之反射率變化的深度方 向以5階段以上進行多階記錄。 經濟部智楚財產局員工消合作社印 本紙張尺度適用中國國家榡準（CNS ) A4規格（210父297公釐） -19-7 B V. Description of the invention ([Table shows the deviation between the speed of the pigment used and the recorded signal (% recording film example 1 quinine blue example 2 phthalocyanine example 3 azo-based comparative example 1 phase change film Radiation exposure time (1) 7.5 7.7 7.1 12.4 Fast laser exposure time (2) 7.3 7.8 7.4 12.0 Degree laser exposure time (3) 7.2 7.7 7.8 11.0 Partial laser exposure time (4) 7.0 7.6 8.2 12.1 Differential laser exposure Time (5) 6.6 7.9 8.4 12.5 値 Laser irradiation time (6) 6.7 8.1 8.4 14.5 (Please read the precautions on the back before filling out this page) Effect of the invention The optical recording medium with pigment recording layer will illuminate the laser light The exposure time was changed 5 times and irradiation was performed, and by using a multi-level recording method for providing the recorded data, multi-level recording was performed in 5 or more steps in the depth direction of the change in the reflectance of the organic pigment recording layer. The paper size of the printed copy of the Bureau ’s Consumer Cooperative is applicable to China National Standard (CNS) A4 (210 father 297 mm) -19-