1249742 玖、發明說明： 【發明所屬之技術領域】 本發明係有關於一種光學記錄媒體之記錄層染料，尤指 一種染料記錄層材料選自eoumarin染料系列並可利用波長 350〜450 run的雷射光記錄及再生資料的光學記錄媒體之記 錄層染料者。 【先前技術】 藉由電腦我們能資料的快速彙整與處理大量資料，進行 資料庫管理、流程控管、事務的模擬、趨勢預測、甚至是 各類藝文_作’如同催化劑—般加速人類生活的步調並 豐富了生活的面向。在日常生活中，幾乎沒有一項能脫離 電知的使用’又拜電腦多舰之盛行，電腦的應用範圍更 顯得無遠弗界。其中，電腦的週邊更是拜多媒體的使用， 而顯出一片蓬勃發展的景象。 通者資訊與多_世代的麵，消費者_存媒體容量 2求急剌加。學者專家無計若要完整記錄兩小時高 ς =的電視影片，約需15 GB的光碟片儲存容量，而沁 則需要更大的儲存空間。由此可見現階段的碟片 CD-r、DVD_r已不能滿足消費者的需求，因此更 片亟需被開發出來。吾人可藉由降低 ==的尺相提高媒_儲存密度，若配合適當的基 ，將可使儲存容量大幅提升，以供下-世代儲存媒 1249742 目前已有所謂「藍光雷射可錄式光學記錄媒體系統」問 世，並且因為讀取一寫入的光源採用的是較短波長405 nm · 的藍光雷射，可有效降低雷射光點的尺寸，所以能提高媒 · 體的儲存密度，若配合適當的記錄染料，將可使儲存容量 提升至25 GB左右，足供下一世代儲存媒體容量之所需。 $目刚已商品化的藍光光記錄媒體的記錄層材料為無機 j變化材料，以有機染料當記錄層的藍光光記錄媒體了目 前僅見於國外專利及文獻上的發表，例如日本專利第 2000343823號一案中，所揭露以具四個pyrrole環架構的染 料當光圮錄媒體之記錄層，並且配合波長為4〇〇〜45〇加^雷 射光源的進行寫入或讀取；日本專利第2000158818號一^ 中，所揭露以benzobisoxa/thiazole染料當光記錄媒體之記 錄層，並且配合波長為4〇〇〜5〇〇 nm雷射光源進行寫入或讀 取；日本專利第11334207號一案中，所揭露以比咯紫質 (porphyrin)染料當光記錄媒體之記錄層，並且配合波長 為215nm雷射光源進行寫入或讀取；日本專利第113342〇5 5虎案中所揭路以比略偶氣（pyrazole azo)染料當光記 鲁 錄媒體之記錄層，並且配合波長為35〇〜53〇nm雷射光源進 行寫入或讀取。 μ 惟，目則光記錄染料的合成或應用專利目前大都掌握在 外國人手中(如:CD_R、DVD_R所用的染料），台灣光記錄媒 · 體廠商每年都要提列不少的權利金給外國公司，所費不 貲，故需要在下世代的藍光光記錄媒體的相關專 ♦ 佈局，避免重蹈CD-R、DVD_R的覆轍。9寻利^早 7 1249742 有鑑於上述藍光雷射記錄染料自行開發的需求，本發明 即提出一種以化學結構為coumarin染料系列之光學記錄媒 體之記錄層染料者。 干 【發明内容】 本發明之主要目的係在於提供一種光學記錄媒體之記 錄層料，该冗錄層染料係選自c〇umarin_料系列並可利 用波長35G〜45G nm㈣射光記錄及再生#料之光學記錄媒 體之記錄層染料者。 本發明之对目的餘於提供—種絲記錄媒體之記 =染料’由⑽_^η _之光學記錄舰之記錄層 =枓取得料且可自製取得，毋庸取得外國專利授權使 ^ η人在下世代藍光光記錄媒體之製造成本支出可大幅降 同，能有進-步的了解與認 【實施方式】 作：：將Ϊ出較佳實施例詳細說明本發明之使用方法，動 二、成功效，以及本發明的其他技術特徵。 結構 _arin _列之化學 又k式（）如下，其係可於一預定波長雷射光束照 1249742 、下吸收光束產生熱能而化學結構發生變化，式中·· r】至& ^可&自氫原子或任意互相獨立的取代基團，取代基困队與 2間可形成環狀結構，該環狀結構較佳者為五元環或六元環， ^代基團R3與域環狀結構，該環狀結構較佳者為與 ^原，刀別1成/、极。該取代基團&與^間可形成環狀結 構，該環狀結構較佳者域氮原子分卿成六元環。前述之取 代基團&與&較佳者分別接有雙甲基。以下將敛述產出本發 明所選用之coumarin染料所需前驅物合成方法。 將 9.16 mmol 之 m_aminopheno卜 4.58 mmol 之碳酸鈣和 8 到如下之化合物1 之N，N-dimethylf0ramide (DMF)於三頸燒瓶内混合通入氮 氣，將此混合液加熱至65°C並攪拌之，再將ι8·78 _〇ι之 (l-chloro-3_methyl_2-butene)逐滴加入於此混合液，待此溶液 冷卻至室溫後，以2ml的醚類(ether)過濾並清洗沈澱物，可得BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording layer dye for an optical recording medium, and more particularly to a dye recording layer material selected from the eoumarin dye series and capable of using laser light having a wavelength of 350 to 450 run. Recording layer dyes for optical recording media for recording and reproducing data. [Prior Art] With the computer we can quickly collect and process a large amount of data, and carry out database management, process control, transaction simulation, trend prediction, and even various kinds of art as a catalyst to accelerate human life. The pace has enriched the face of life. In daily life, there is hardly any use that can be separated from the use of electricity. In addition to the prevalence of computer multi-ships, the scope of application of computers is even more distant. Among them, the periphery of the computer is more about the use of multimedia, and shows a booming scene. The information of the general and the more than _ generation, the consumer _ memory capacity 2 seeking urgently. Scholars and experts do not count to fully record a two-hour high-definition TV movie, which requires about 15 GB of optical disk storage capacity, while 沁 requires more storage space. It can be seen that the CD-r and DVD_r discs at this stage can no longer meet the needs of consumers, so more films need to be developed. We can increase the media density by reducing the scale of ==. If the appropriate base is used, the storage capacity will be greatly improved for the next-generation storage medium 1249742. So-called "blue laser-recordable optics" The recording media system came out, and because the light source for reading a write is a short-wavelength 405 nm · blue laser, the size of the laser spot can be effectively reduced, so the storage density of the medium can be increased. Proper recording of the dye will increase the storage capacity to around 25 GB, which is sufficient for the next generation of storage media capacity. The recording layer material of the commercially available blue light recording medium is an inorganic j-variable material, and the blue light recording medium with the organic dye as the recording layer is currently only published in foreign patents and literatures, for example, Japanese Patent No. 2000343823 In the case of No. 1, it is disclosed that the dye with four pyrrole ring structure is used as the recording layer of the optical recording medium, and is written or read with the wavelength of 4〇〇~45〇 plus laser light source; Japanese patent In Japanese Patent No. 2000158818, a recording layer of an optical recording medium with a benzobisoxa/thiazole dye is disclosed, and a laser light source having a wavelength of 4 〇〇 to 5 〇〇 nm is used for writing or reading; Japanese Patent No. 11334207 In the case, it is disclosed that a porphyrin dye is used as a recording layer of an optical recording medium, and is written or read with a laser source having a wavelength of 215 nm; the road disclosed in Japanese Patent No. 113342〇5 5 The pyrazole azo dye is used as a recording layer of the optical recording medium, and is written or read with a laser light source having a wavelength of 35 〇 53 53 nm. μ, However, the patents for the synthesis or application of optical recording dyes are currently in the hands of foreigners (such as the dyes used in CD_R and DVD_R), and Taiwan’s optical recording media companies have to submit many royalties to foreign countries every year. The company is not expensive, so it needs to be related to the layout of the next generation of Blu-ray optical recording media to avoid repeating the mistakes of CD-R and DVD_R. 9 寻利^早 7 1249742 In view of the self-developed requirements of the above-mentioned blue laser recording dye, the present invention proposes a recording layer dye which is an optical recording medium having a chemical structure of the coumarin dye series. SUMMARY OF THE INVENTION The main object of the present invention is to provide a recording layer of an optical recording medium selected from the group of c〇umarin materials and capable of recording and reproducing light by using a wavelength of 35 G to 45 G nm. The recording layer dye of the optical recording medium. The purpose of the present invention is to provide - the recording medium of the recording medium = dye 'by the recording layer of the optical recording ship of (10)_^ _ _ is obtained from the material and can be obtained by itself, and it is not necessary to obtain a foreign patent authorization to enable the next generation The manufacturing cost of the Blu-ray optical recording medium can be greatly reduced, and the understanding and recognition can be further improved. [Embodiment]: The preferred embodiment of the present invention will be described in detail, and the method of use of the present invention will be described in detail. And other technical features of the invention. The structure _arin_column chemistry is also K-type () as follows, which can be used to generate thermal energy and a change in chemical structure at a predetermined wavelength of the laser beam 12479742, where r·to & ^ can & From a hydrogen atom or any mutually independent substituent group, a substituent group and two groups may form a ring structure, and the ring structure is preferably a five-membered ring or a six-membered ring, and a substituted group R3 and a domain ring; The shape of the ring structure is preferably the same as that of the original structure. The substituent group & and ^ can form a cyclic structure, and the ring structure preferably has a domain nitrogen atom divided into a six-membered ring. The above substituted groups && preferred are respectively attached with a bismethyl group. The method of synthesizing the precursors required to produce the coourin dyes selected for use in the present invention will be summarized below. 9.16 mmol of m_aminopheno b. 4.58 mmol of calcium carbonate and 8 of N, N-dimethylf0ramide (DMF) of the following compound 1 were mixed in a three-necked flask, and the mixture was heated to 65 ° C and stirred. Then add ι8·78 _〇ι(l-chloro-3_methyl_2-butene) dropwise to the mixture. After the solution is cooled to room temperature, filter with 2 ml of ether and wash the precipitate. Got
在一内置攪拌器之50 ml的雙頸燒瓶内放入1 ·23 ml之 甲基磺酸(methane sulfonic acid)，雙頸燒瓶内通入氮氣，將 3.94 mmol化合物1在25分鐘内加入此溶液，此混合液加 熱至100°C並劇烈攪拌約1小時，緩慢倒入50 ml的水，並 以瓷器漏斗過濾之，即可得到如下之化合物2。 1249742In a 50 ml two-necked flask equipped with a stirrer, put 1 · 23 ml of methane sulfonic acid, introduce a nitrogen gas into the flask, and add 3.94 mmol of compound 1 to the solution within 25 minutes. The mixture was heated to 100 ° C and vigorously stirred for about 1 hour, poured slowly into 50 ml of water, and filtered through a porcelain funnel to obtain the following compound 2. 1249742
在劇烈攪拌的氫氧化鈉(sodium hydroxide)水溶液中 ’緩慢加入3.20 mmol之化合物2。攪拌5分鐘後，再加 入25 ml的乙酸乙酯(ethyl acetate)並攪拌至出現明顯的兩 柏’收集有機相的溶液，經過乾燥、過濾、濃縮，可得到 如下之coumarin染料前驅物（化合物3 )。3.20 mmol of Compound 2 was slowly added to a vigorously stirred aqueous solution of sodium hydroxide. After stirring for 5 minutes, 25 ml of ethyl acetate was added and stirred until a clear solution of the organic phase of the two cypresses was collected. After drying, filtration and concentration, the following coumarin dye precursor (compound 3) was obtained. ).
吾人可藉由上述前驅物，合成出本發明各實施例所需 使用之coumarin染料。 本發明光學記錄媒體之記錄層染料的第一實施例The coumarin dyes required for the various embodiments of the present invention can be synthesized by the above precursors. First Embodiment of Recording Layer Dyes of Optical Recording Media of the Present Invention
coumarin-Ι化學結構式如下： 將4.08 mmol的前驅物（化合物3)，與4·64 mmol的 2-Oxo-cyclo- pentanecarboxylic acid methyl ester，及 1 78 mmol的無水氯化鋅(anhydrous zinc chloride)，共混於2〇如 的乙醇，將10 ml的冰水加入於此混合液並徹底授拌後，以 乙酸乙醋卒取產物，產物流經管柱加以純化，即可得呈^ 色晶體狀的coumarin_l。將coumarin-Ι溶解於2,2,3,3-四氣 1249742 基丙炫（2,2,3,3-tetrafluoropropanol，TFP)溶劑中，並取出部 分溶液旋轉塗佈於聚碳酸基板2成膜，其在溶液態及薄膜 態的紫外線-可見光吸收光譜，如圖一 A所示，在4〇〇nm波 長把圍附近均具有相當吸收值’足見coumarin_l可在藍光 雷射照射下吸收藍光產生熱能而結構發生變化。 本發明光學記錄媒體之記錄層染料的第二實施例 coumarin-2化學結構式如下：The chemical formula of coumarin-oxime is as follows: 4.08 mmol of precursor (compound 3), 4.64 mmol of 2-Oxo-cyclo-pentanecarboxylic acid methyl ester, and 1 78 mmol of anhydrous zinc chloride (anhydrous zinc chloride) Blend in 2% ethanol, add 10 ml of ice water to the mixture and thoroughly mix the mixture, and then draw the product with ethyl acetate. The product is purified through the column to obtain a crystal. Coumarin_l. The coumarin-oxime was dissolved in a solvent of 2,2,3,3-tetragen 1247442-based (2,2,3,3-tetrafluoropropanol, TFP), and a part of the solution was spin-coated on the polycarbonate substrate 2 to form a film. The ultraviolet-visible absorption spectrum in the solution state and the film state, as shown in Fig. A, has a considerable absorption value near the wavelength of 4 〇〇 nm. It can be seen that coumarin_l can absorb blue light under blue laser irradiation to generate heat energy. The structure changes. A second embodiment of the recording layer dye of the optical recording medium of the present invention The chemical structure of coumarin-2 is as follows:
將 4·08 mmol 的前驅物，與 4·63 mm〇1 的 2-〇χ⑴cyd〇_ hexanecarboxylic acid methyl ester，及 1·78 mmol 的無水氣 化鋅(anhydrous zinc chloride)，共混於20 ml 的乙醇，將 i〇 mi 的冰水加入於此混合液並徹底擾拌後，以乙酸乙酯萃取產 物，產物流經管柱加以純化，即可得呈黃色晶體狀的 coumarin-2。將coumarin_2溶解於223 3四氟基丙烷 (2,2,3,3-tetraflu〇r〇propanol，TFP)溶劑中，並取出部分溶液旋 轉塗佈於聚碳酸基板2細，其在溶液態及薄膜態的紫外 線-可見光吸收光譜，如圖一 B所示，在4〇〇nm波長範圍附 近均具有相當吸收值，足見coumarin_2可在藍光雷射照射 下產生變化。 本發明光學記錄媒體之記錄層染料的第三實施例 coumarin_3化學結構式如下： 1249742 將 4·08 mmol 的前驅物，與 4·63 mmol 的4-1^11(^_3-oxo-butyric acid methyl ester，及 1·78 mmol 的無水氣化鋅 (anhydrous zinc chloride)，共混於 20 ml 的乙醇，將 1〇 ml 的冰水加入於此混合液並徹底攪拌後，以乙酸乙醋萃取產 物，產物流經管柱加以純化，即可得呈黃色晶體狀的 coumarin-3。將 coumarin-3 溶解於 2,2,3,3-四氟基丙醇 (2,2,3,3-tetrafluoropropanol，TFP)溶劑中，並取出部分溶液旋 轉塗佈於聚碳酸基板2成膜，其在溶液態及薄膜態的紫外 線-可見光吸收光譜，如圖一 C所示，在400nm波長範圍附 近均具有相當吸收值，足見coumarin_3可在藍光雷射照射 下產生變化。 '4.08 mmol of the precursor was blended with 2·63 mm〇1 of 2-〇χ(1)cyd〇_ hexanecarboxylic acid methyl ester, and 1.78 mmol of anhydrous zinc chloride (anhydrous zinc chloride) in 20 ml. Ethanol, ice water of i〇mi was added to the mixture and thoroughly disturbed, and the product was extracted with ethyl acetate. The product was purified through a column to obtain coumarin-2 as a yellow crystal. The coumarin_2 was dissolved in a solvent of 223 3 tetrafluoropropane (2,2,3,3-tetraflu〇r〇propanol, TFP), and a part of the solution was spin-coated on the polycarbonate substrate 2 in a solution state and a film. The ultraviolet-visible absorption spectrum of the state, as shown in Fig. 1B, has a considerable absorption value in the vicinity of the wavelength range of 4 〇〇 nm, which shows that coumarin_2 can be changed under the irradiation of blue light. The chemical structure of the third embodiment of the recording layer dye of the optical recording medium of the present invention is as follows: 1249742 The precursor of 4·08 mmol is combined with 4.63 mmol of 4-1^11(^_3-oxo-butyric acid methyl Ester, and 1.78 mmol of anhydrous hydrolyzed zinc (anhydrous zinc chloride), blended in 20 ml of ethanol, 1 〇ml of ice water was added to the mixture and thoroughly stirred, and the product was extracted with ethyl acetate. The product is purified by pipe column to obtain coumarin-3 in the form of yellow crystals. Coumarin-3 is dissolved in 2,2,3,3-tetrafluoropropanol (TFP) In the solvent, a part of the solution is spin-coated on the polycarbonate substrate 2 to form a film, and the ultraviolet-visible absorption spectrum in the solution state and the film state, as shown in FIG. 1C, has a considerable absorption value in the vicinity of the wavelength range of 400 nm. It can be seen that coumarin_3 can change under the illumination of blue light.
吾人可選用上述 coumarin-1、coumarii>2、eoumarinJ 染料之一組成染料記錄層，製成多種藍光雷射光學記錄媒 體（高密度可錄式光碟片），以下將針對利用coumaHn—j作 為染料記錄層之第一光學記錄媒體之製造過程加以敘述 (圖中未表示）。將配置好的c〇umarin染料溶於TFp溶劑 中（所配的重量百分率濃度可為〇·5〜5%，溶液的濃度最好 是1〜2 %) ’以旋轉塗佈機塗佈於厚〇·6 mm的聚碳酸樹酯 基版，塗膜的厚度則以染料的濃度、塗佈機的轉速及注入 的量來控制，染料溶液塗佈於軌距（Trackpiteh)〇 76|Lim、 軌溝深度（Groove depth) 170 nm、執溝寬度（Groove width) 0·28 μπι的基版上。染料記錄層形成後，於其上方再以濺鍍 機滅鑛上金屬反射層，反射層的厚度可以濺鍍電流及濺鍍 時間來控制，厚度可為5〇〜15〇 nm ,最好是8〇〜110 nm。 12 1249742 金屬反射層上方再以旋轉塗佈機塗佈一厚約5#m並以紫 外光硬化的保護層。最後利用網版印刷的方式塗上一層黏 ， 合膠，再將一空白（Dummy)片與此片膠合，即成厚12 mm , 之第一光學記錄媒體（高密度可錄式光碟片）。 吾人針對上述第一光學記錄媒體進行動態特性測試，以 Pulstec公司所生產的DDU_1000 (雷射波長4〇5nm，聚焦透 鏡之數值孔徑值(NA)是0·65)來測試碟片的電氣特性，將 碟片轉速設定為定線速度（CLV) 3.5 m/s，寫入3Τ訊號的 籲 長度為400 nm，讀取功率設定在〇·2 mw ;設定定線速度 (CLV) 2.2 m/s，寫入3T訊號的長度為250 nm，讀取功率設 定在0.2 mW ;以及各種倍數於DVD-R的資料傳輸速率測 試光碟片固定寫入9T mark的長度以上三種實驗設計來測 試，觀察光碟片是否可被聚焦(f0cus)與鎖軌(track)。請參照 圖二A、B以及C，第一光學記錄媒體之染料記錄層，其 在不同定線速度下均可獲得相當訊雜比（CNR)，光碟片確 實可被聚焦（focus)與鎖執(track)。此外，若吾人選用 馨 coumarin-2或coumarin-3作為光學記錄結構之染料記錄 層，請分別參見圖三A、B與C以及圖四A、B與c， 其在不同定線速度下亦均可獲得相當訊雜比（CNR)，光碟 片同樣確實可被聚焦(focus)與鎖執(track)。 紅上所述’製造本發明光學記錄媒體之記錄層染料所選 f 用之coumarin染料系列確實可利用波長35〇〜45〇 nm的齡 . 光雷射產生變化，且使_ _她純作躲料記錄;; 之光學記錄媒體亦確實能夠進行記錄及再生#料，本發二 13 1249742 之目的及功效上触富實施之進錢，極具產業之利用價 值，且為目前市面上前所未見之發明，完全符合發明專利 之進步性與新酿要件，纽缺Μ請。唯以上所述者， 僅為本發明之較佳實施_已，當不能以之較本發明所 實施之翻。即大凡依本發日种料纖_作 化與修飾’皆應仍屬於本發明專利涵蓋之範圍内，謹言主= 審查委員明鑑，並祈惠准，是所至禱。 貝 1249742 【圖式簡單說明】 圖一A、B、C分別係為本發明之第一、二、三實施例之 ’ coumarin染料溶液態及薄膜態之紫外線-可見光吸 * 收光譜。 圖二A、B與C分別係為本發明第一實施例coumarin染料 之光學記錄媒體於定線速度（CLV) 3.5 m/s;定線速 度（CLV) 2.2 m/s ;寫入9T mark於不同的寫入倍速 下，其CNR對寫入功率的關係圖。 _ 圖三A、B與C分別係為本發明第二實施例coumarin染料 之光學記錄媒體於定線速度（CLV) 3.5 m/s;定線速 度（CLV) 2.2 m/s ;寫入9T mark於不同的寫入倍速 下，其CNR對寫入功率的關係圖。 圖四A、B與C分別係為本發明第三實施例coumarin染料 之光學記錄媒體於定線速度（CLV) 3·5 m/s;定線速 度（CLV) 2.2 m/s ;寫入9T mark於不同的寫入倍速 下，其CNR對寫入功率的關係圖。 應 15We can use one of the above coumarin-1, coumarii2, and eoumarinJ dyes to form a dye recording layer to make a variety of blue laser optical recording media (high-density recordable optical discs). The following will be used for recording with coumaHn-j as a dye. The manufacturing process of the first optical recording medium of the layer is described (not shown). Dissolve the configured c〇umarin dye in TFp solvent (the concentration of the compound can be 〇·5~5%, the concentration of the solution is preferably 1-2%). 〇·6 mm polycarbonate base, the thickness of the coating is controlled by the concentration of the dye, the speed of the coater and the amount of the injection. The dye solution is applied to the gauge (Trackpiteh) 〇76|Lim, rail Groove depth 170 nm, Groove width 0. 28 μπι on the base plate. After the dye recording layer is formed, the metal reflective layer is destroyed by a sputtering machine, and the thickness of the reflective layer can be controlled by sputtering current and sputtering time, and the thickness can be 5 〇 15 15 nm, preferably 8 〇 ~110 nm. 12 1249742 Above the metal reflective layer, a protective layer thickened by about 5 #m and hardened with ultraviolet light was applied by a spin coater. Finally, a layer of adhesive and glue is applied by screen printing, and a blank (Dummy) sheet is glued to the sheet to form a first optical recording medium (high-density recordable optical disc) having a thickness of 12 mm. We tested the dynamic characteristics of the above-mentioned first optical recording medium, and tested the electrical characteristics of the disc with DDU_1000 (laser wavelength 4〇5nm, numerical aperture value (NA) of the focus lens is 0·65) produced by Pulstec. Set the disc speed to the linear velocity (CLV) of 3.5 m/s, the write length of the write 3 Τ signal to 400 nm, the read power set to 〇·2 mw, and the set linear velocity (CLV) of 2.2 m/s. The length of the write 3T signal is 250 nm, the read power is set at 0.2 mW, and various data transmission rate test DVD discs are written to the length of the 9T mark. The three experimental designs are tested to see if the disc is observed. Can be focused (f0cus) and track. Referring to FIG. 2A, B and C, the dye recording layer of the first optical recording medium can obtain a comparable signal-to-noise ratio (CNR) at different line speeds, and the optical disc can be focused and locked. (track). In addition, if we use coumarin-2 or coumarin-3 as the dye recording layer of the optical recording structure, please refer to Figure 3A, B and C and Figure 4A, B and C respectively, which are also at different alignment speeds. A comparable signal-to-noise ratio (CNR) is available, and the disc can indeed be focused and tracked. The above-mentioned coumarin dye series for the preparation of the recording layer dye of the optical recording medium of the present invention can be used at a wavelength of 35 〇 to 45 〇 nm. The light laser produces a change, and makes _ _ she purely hide The optical recording medium can also be recorded and regenerated. The purpose and function of this issue 2 13 1249742 are rich in the use of the industry, which is of great value to the industry and is currently on the market. Seeing the invention, it is in full compliance with the advancement of the invention patent and the new brewing requirements. The above is only a preferred embodiment of the present invention, and should not be implemented in comparison with the present invention. That is to say, the daily production of the material and the modification of the material should still fall within the scope covered by the patent of the present invention. It is said that the main = review committee member, and pray for the right, is the prayer. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A, B, and C are respectively the ultraviolet-visible absorption spectrum of the solution state and the film state of the 'coumarin dyes of the first, second and third embodiments of the present invention. 2, B and C are respectively the optical recording medium of the coumarin dye according to the first embodiment of the present invention at a linear velocity (CLV) of 3.5 m/s; a linear velocity (CLV) of 2.2 m/s; written by 9T mark The relationship between CNR and write power at different write speeds. _ Figure 3 A, B and C are respectively the optical recording medium of the coumarin dye according to the second embodiment of the present invention at a linear velocity (CLV) of 3.5 m/s; a linear velocity (CLV) of 2.2 m/s; written to 9T mark The relationship between CNR and write power at different write speeds. 4A, B and C are respectively the optical recording medium of the coumarin dye according to the third embodiment of the present invention at a linear velocity (CLV) of 3·5 m/s; a linear velocity (CLV) of 2.2 m/s; written to 9T. Mark is the relationship between CNR and write power at different write speeds. Should 15