501127 A7 __ —____B7 五、發明説明（1 ) 【發明所屬技術領域】 (請先閲讀背面之注意事項再填寫本頁) 本發明係關於對應供予記錄之資料，將雷射光之照射 時間及照射功力至少一方切換爲多階段照射於記錄層，而 將上述資料予以多層記錄之光記錄媒體。 【習知技術】 以往，例如在透光性基板上將記錄層，反射膜以此順 序予以設置所成之CD — R，DVD - R等光記錄媒體，針對 藉將再生信號之長度（反射信號調制部之長度）變爲多階段以 記錄資料之方法，乃被進行藉將再生信號之深度（反射信號 之調制度）予以切換爲多階段，而將多數資料記錄於相同長 度各信號之方法有關之多數硏究。 依據此種光記錄方法，比起單以有無凹坑而記錄二進 制資料之情形，由於能沿深度方向記錄多數資料，致可增 多分配給所定長度之信號量。因此，可提昇磁道記錄密度 ，故有利用全息照相，或將記錄層設成多層之提案。 經濟部智慧財產局員工消費合作社印製 在此，則將藉利用反射率之深度變動等以多階段記錄 資料之情形稱謂多層記錄。 【發明欲解決之課題】 在如此多層記錄，爲提昇記錄密度卻需要縮短記錄標 記。 惟，將記錄標記比記錄·讀取所使用雷射聚光時之光 束直徑更加趨小時，多層記錄即變爲困難。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ^ -4 - 501127 A7 B7 五、發明説明（2 ) (請先閲讀背面之注意事項再填寫本頁) 例如，在特開平1 0 — 1 34353號公報有爲進行多層記錄 而調整雷達光量之記載。在此，光記錄媒體如爲色素膜或 相轉變膜時，乃由記錄部分與未記錄部分之反射相異以形 成再生信號。因此，特開平1 0 — 1 34353號公報之方法，其 未記錄階段與記錄階段係屬於有無記錄之關係，並不適於 多階段記錄。更具體言之，相轉變膜或色素膜並不存在記 錄與未記錄之中間狀態。 至目前，色素膜或相轉變膜能以光記錄媒體藉調整雷 射光量進行多階段多層記錄，則是由於雷射功率之變化主 要促使記錄標記之幅度變化所致。 一般聚光束雖呈高斯分佈，惟記錄膜爲色素膜或相轉 變膜時，係在超過某閾値部分進行記錄。則是藉變化雷射 功率，以變化可記錄聚光束之光點尺寸，而促使記錄標記 之幅度變化。 經濟部智慧財產局員工消費合作社印製 然，爲提高記錄密度以致記錄標記長度變爲比聚光束 徑更短時，在調制雷射功率以變化標示幅度之手法，欲進 行多階段，尤其進行5階段以上之多層記錄即變困難。亦 即以變化記錄功率，欲將再生時之反射層變化爲5階段以 上變爲困難。 一般聚光束之直徑係以Κ λ / NA(K ··常數，λ :雷射 波長，ΝΑ :透鏡孔徑）加以表示。CD所利用之拾音器乃λ = 7 80nm，ΝΑ = 0·45而直徑呈約1.6 // m。此時，記錄標記 長度呈1.6 // m以下時，以往之促使雷射功率變化之方法貝[J 困難進行5階段以上之多層記錄。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -5- 501127 A7 B7 五、發明説明（3 ) (請先閲讀背面之注意事項再填寫本頁) 又，如特開平1 — 1 82 846號公報所揭露，亦有當對於 記錄層之入射光量以數位量被賦予時，記錄層之反應物吸 光度以數位量變化之光記錄媒體。 然而，該光記錄媒體係推測對於雷射照射量（次數）之吸 光度變化之絕對直非常之小，致尙未達到實用化。 更，如特開昭6 1 — 2 1 1 835號公報所揭露，亦有促使照 射彩色材料之照射光強度或照射次數變化，予以記錄爲任 意階段之發色濃度狀態之光記錄方法。 惟，該光記錄方法卻有在照射雷射光予以讀取時，無 法將發色濃度狀態讀取爲5階段以上之問題。 本發明人乃發現；雖在記錄標記長度比聚光束徑爲短 之條件下，亦能藉促使雷射照射時間或照射功率至少一方 變化，而進行5階段以上之多層記錄。且亦發現；比起雷 射照射時隨溫度上昇之自未記錄至記錄之變化較急劇之相 轉變材料，變化較緩和之色素材料更適合爲記錄膜之材料 〇 經濟部智慧財產局員工消費合作社印製 在此，隨著雷射照射時間之增長，及/或照射功率增 大，記錄膜所吸引熱能即變多。當熱能超過某閾値時色素 即分解·變質，在記錄膜進行記錄。超過閾値之冗餘熱能 則透過反射膜被擴散於周圍。例如在CD - R等光記錄媒體 ’當上述熱能之擴散不足時，即產生基板或基板上所刻引 導磁道變形之不良影響。 本發明係考慮上述，以提供一種利用一般廣泛實用化 之如CD - R光記錄媒體，進行多階段之多層記錄，而可獲 本紙張尺度適用中國國家標準（ CNS ) A4規格（210X297公釐） -6- 經濟部智慧財產局員工消費合作社印製 501127 A7 _____B7____ 五、發明説明U ) 得良好品質之光記錄媒體，尤其是促使雷射照射所發生熱 能充分進行擴散，且可防止透光性基板或其所刻雷射引導 用凹槽之變形，以及反射膜上之保護膜變形所招惹之記錄 信號劣化之光記錄媒體爲目的。 【解決課題所採取手段】 本發明人就光記錄媒體加以重複銳意硏究結果，發現 對其進行多階段記錄之記錄方法，並確認藉該記錄方法可 在光記錄媒體實行5階段以上之高密度多層記錄。且本發 明人更進行各種實驗，發覺將透光性基板之材質，反射膜 之熱傳導率及膜厚予以規定對熱擴散頗爲重要，而達到本 發明。即，藉以下之發明能達成上述目的。 係在透光性基板上具有以色素爲主成分之記錄層，與 接觸於該記錄層所形成之反射膜，並藉將雷射束照射於上 述記錄層以形成記錄標記予以記錄資訊，且對該記錄標記 照射讀取雷射束而可讀取所記錄資訊之光記錄媒體，其特 徵在於： 上述記錄層具有被規定於雷射束與記錄層之相對性移 動方向之任意單位長度及與此直交方向之單位幅度且被連 續性設定於上述移動方向之虛擬記錄單元所成，該虛擬記 錄單元之上述記錄層乃對應雷射束之照射時間及照射功力 至少一方之5階段以上調制而能形成大小相異之記錄標記 ，並藉此可調制記錄標記之對於虛擬記錄單元之面積比及 透光率中之至少依據面積比之光反射率以進行5階段以上 I紙張尺度適用中國國家標準（CNS ) A4規格( 210X297公釐） ' ' (請先閲讀背面之注意事項再填寫本頁)501127 A7 __ —____ B7 V. Description of the invention (1) [Technical field to which the invention belongs] (Please read the precautions on the back before filling out this page) The present invention is related to the information provided for recording, the irradiation time and irradiation of laser light At least one of the skills is switched to an optical recording medium that is irradiated to the recording layer in multiple stages and the above data is recorded in multiple layers. [Knowledge technology] Conventionally, for example, optical recording media such as CD-R, DVD-R, etc., in which a recording layer and a reflective film are arranged in this order on a light-transmitting substrate, The length of the modulation section) becomes a multi-stage method for recording data, which is performed by switching the depth of the reproduced signal (the modulation degree of the reflected signal) to multi-stage, and recording most of the data in the signals of the same length. Most of them studied. According to this optical recording method, compared to the case of recording binary data with or without pits alone, since most data can be recorded in the depth direction, the amount of signals allocated to a given length can be increased. Therefore, the track recording density can be increased, so there are proposals to use holograms or to set the recording layer to multiple layers. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Here, the multi-level record will be referred to when the data is recorded in multiple stages by taking advantage of deep changes in reflectivity. [Problems to be Solved by the Invention] In such a multilayer recording, it is necessary to shorten the recording mark in order to increase the recording density. However, when the recording mark is made smaller than the beam diameter at the time of recording and reading the laser light used for condensing, multilayer recording becomes difficult. This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) ^ -4-501127 A7 B7 V. Description of invention (2) (Please read the precautions on the back before filling this page) For example, in JP 1 0-1 34353 describes the adjustment of the amount of radar light for multi-layer recording. Here, when the optical recording medium is a pigment film or a phase-change film, the reflection of the recorded portion is different from that of the unrecorded portion to form a reproduction signal. Therefore, the method disclosed in Japanese Patent Application Laid-Open No. 10-1 34353 has a relationship between the unrecorded stage and the recorded stage, and is not suitable for multi-stage recording. More specifically, there is no intermediate state between recorded and unrecorded phase change films or pigment films. Up to now, pigment film or phase change film can be used for multi-stage multi-layer recording by adjusting the amount of laser light with optical recording media, because the change of laser power mainly causes the amplitude of recording marks to change. Although the condensed beam generally has a Gaussian distribution, when the recording film is a pigment film or a phase change film, recording is performed at a portion exceeding a certain threshold. By changing the laser power to change the spot size of the recordable spotlight, the amplitude of the recording mark is changed. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, in order to increase the recording density so that the record mark length becomes shorter than the spot diameter, the method of modulating laser power to change the mark range is intended to be carried out in multiple stages, especially for 5 Multi-level recording above the stage becomes difficult. That is, it is difficult to change the reflective layer during reproduction to 5 steps or more by changing the recording power. In general, the diameter of a condensed beam is represented by κ λ / NA (K ·· constant, λ: laser wavelength, NA: lens aperture). The pickup used by the CD is λ = 7 80nm, NA = 0.45 and the diameter is about 1.6 // m. At this time, when the length of the recording mark is less than 1.6 // m, the conventional method of promoting laser power changes [J] It is difficult to perform multi-level recording with more than 5 stages. This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -5- 501127 A7 B7 V. Description of the invention (3) (Please read the precautions on the back before filling this page) Another example is JP-A-1 — As disclosed in Japanese Patent Publication No. 1 82 846, there is also an optical recording medium in which the absorbance of the reactants of the recording layer changes digitally when the incident light amount of the recording layer is given digitally. However, this optical recording medium is speculated that the absolute change in the absorbance of the laser irradiation amount (number of times) is extremely small, so that it has not been put into practical use. Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 6 1-2 1 1 835, there is also a light recording method that promotes a change in the intensity or number of times of irradiation light to irradiate a color material and records it as a state of color development density at any stage. However, this optical recording method has a problem that when the laser light is irradiated for reading, the state of the color density cannot be read in more than five stages. The present inventors have discovered that even under the condition that the recording mark length is shorter than the spot diameter, it is possible to perform multilayer recording of more than 5 stages by causing at least one of laser irradiation time or irradiation power to change. It has also been found that, compared with the phase change material with a sharper change from unrecorded to recorded with the temperature rise during laser irradiation, the less changeable pigment material is more suitable for the material of the recording film. Intellectual Property Bureau, Ministry of Economic Affairs, Consumer Consumption Cooperative Printed here, as the laser irradiation time increases and / or the irradiation power increases, the thermal energy attracted by the recording film increases. When the thermal energy exceeds a certain threshold, the pigment is decomposed and deteriorated and recorded on the recording film. Redundant thermal energy that exceeds the threshold is diffused around the reflective film. For example, in an optical recording medium such as CD-R, when the above-mentioned thermal energy is insufficiently diffused, the substrate or the engraved track deformation on the substrate is adversely affected. The present invention takes the above into consideration to provide a multi-stage multi-layer recording using a generally widely used optical recording medium such as CD-R, and can obtain the paper size applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -6- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 501127 A7 _____B7____ V. Invention Description U) Obtain a good quality optical recording medium, especially to promote the full diffusion of thermal energy generated by laser irradiation, and prevent light-transmitting substrates Or the optical recording medium whose recording signal is degraded by deformation of the laser guide groove and the deformation of the protective film on the reflective film, or the engraved grooves thereof. [Means adopted to solve the problem] The inventor repeated repeated intensive investigations on the optical recording medium, and found a recording method for multi-stage recording, and confirmed that the recording method can implement a high density of 5 stages or more on the optical recording medium. Multi-layered records. In addition, the inventors conducted various experiments and found that it is important for thermal diffusion to specify the material of the light-transmitting substrate, the thermal conductivity of the reflective film, and the film thickness, and to achieve the present invention. That is, the above-mentioned objects can be achieved by the following inventions. The light-transmitting substrate has a recording layer mainly composed of a pigment, a reflective film formed in contact with the recording layer, and a laser beam is irradiated onto the recording layer to form a recording mark to record information. The recording mark irradiates an optical recording medium that reads a laser beam and can read recorded information, wherein the recording layer has an arbitrary unit length defined in a relative moving direction of the laser beam and the recording layer, The unit width in the orthogonal direction is formed by a virtual recording unit whose continuity is set in the moving direction. The recording layer of the virtual recording unit can be formed by 5 or more modulations corresponding to at least one of the irradiation time and the irradiation power of the laser beam. Record marks of different sizes can be used to modulate the area ratio and light reflectance of the record mark to the virtual recording unit based on at least the area ratio of light reflectance for 5 stages or more. I Paper size applies Chinese national standard (CNS ) A4 size (210X297mm) '' (Please read the precautions on the back before filling this page)
經濟部智慧財產局員工消費合作社印製 501127 A7 _ B7 五、發明説明（5 ) 之多層記錄，且上述透光性基板爲玻璃轉變點（Tg)80 °C以 上1 60 °C以下之熱塑性樹脂製，上述反射膜爲熱傳導率 3 00k / W · m 1 . K…以上之金屬，上述記錄標記部分之 膜厚爲50nm以上。 (2)上述（1)之光記錄媒體亦以上述反射膜材料之熱傳 導率與膜厚之積呈2 X 10 — 5k/W· K—1以上爲特徵。 亦即以反射膜材料使用熱傳導率比300k / W · m 1 · K — 1小之材料，或反射膜之厚度爲50nm以下時，冗餘熱則 會使基板或該基板所刻雷射引導用凹槽變形，更使反射膜 上之保護膜變形招惹記錄信號之劣化。 此種影響乃被刻有雷射引導用凹槽之基板材料之玻璃 轉變點溫度所左右。以材料使用如玻璃之玻璃轉變點溫度 高之材料時，並未見到熱所致之變形。惟如使用玻璃轉變 點溫度80 °C以上1 60 °C以下之材料時，卻發現大受此種影 響。 此種熱擴散之影響，亦被確認在記錄標記接近於記錄 方向之多層記錄時特別大。 以往之光記錄媒體雖亦有記錄時之熱所致之影響，但 在多層記錄，則可推定；由於爲提昇記載密度招來線方向 之記錄標記接近，致比以往更容易受影響。 又，在此所謂記錄標記大小，係指記錄層之構成材料 由於雷射束照射致分解變質，其折射率變化時之變化量大 小，或由於其變化之厚度方向大小致使透光率變化時之變 化量大小之意。 本紙張尺度適用中國國家標準(CNS ) A4規格（210X 297公釐)一 ---------Φ---I, I—1T----——舞 (請先閲讀背面之注意事項再填寫本頁) -8- 501127 A7 ____B7_ 五、發明説明（6 ) 且’上述光記錄媒體亦可如下加以構成。 (請先閲讀背面之注意事項再填寫本頁) (3) 上述虛擬記錄單元之單位長度被設成略等於上述最 大照射時間之雷射束照射所形成記錄標記之長度爲特徵之 (1)或（2)之光記錄媒體。 (4) 沿上述記錄層係設有雷射束引導用凹槽，上述虛擬 記錄單元即被設於上述凹槽內，且上述單位幅度與上凹槽 幅度略呈相同爲特徵之（1)，（2)或（3)之光記錄媒體。 (5) 上述虛擬記錄單元之述單位長度係被設成上述讀取 雷射束之束腰直徑以下爲特徵之（1)乃至（4)之任一光記錄媒 體。 (6) 上述記錄層一部分係預先已被多層記錄妥資訊爲特 徵之（1)乃至（5)之任一光記錄媒體。 (7) 上述虛擬記錄單元與已被多層記錄妥資訊部分之至 少一方係被記錄有表示多層光記錄媒體之特定資訊爲特徵 之（1)乃至（6)之任一光記錄媒體。 (8) 沿上述記錄層係設有雷射束引導用凹槽，該凹槽一 部分呈中斷爲特徵之（1)乃至（7)之任一光記錄媒體。 經濟部智慧財產局員工消費合作社印製 【發明之實施形態】 以下就本發明之實施形態例，參照圖示詳細加以說明 〇 本發明實施形態例有關之光記錄媒體10係爲在記錄層 12使用色素之CD_ R，而含有：透光性基板14，與以塗 抹覆蓋於該透光性基板14 一面（圖1之上面）所形成雷射束 ^紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ' -9 - 501127 A7 B7 五、發明説明（7 ) (請先閲讀背面之注意事項再填寫本頁) 引導用凹槽16之色素爲主成分之上述記錄層12，與藉噴漆 法等予以形成於該記錄層12上側之光反射膜1 8，以及被覆 於該反射膜1 8外側之保護層20所構成。 上述透光性基板14爲玻璃轉變點（Tg)80°C以上160°C 以下之熱塑性樹脂製，例如可適用聚碳酸酯樹脂，聚甲基 丙烯酸甲酯樹脂，環氧樹脂，聚烯樹脂，聚酯樹脂等。又 ，玻璃轉變點乃依據例如】ISK7 121之差示熱分析者。 上述透光性基板14上設置之記錄層12爲有機色素所成 。該有機色素乃可花青系色素，二羥基環丁烯二酮鏺 (squarylium)系色素，環戊烯三酮鑰（croconium)系色素，蒽 醌系色素，含金屬偶氮系色素，献花青系色素等。 經濟部智慧財產局員工消費合作社印製 有機色素塗抹液用溶劑則可使用乙酸丁基，乙酸溶纖 劑等之酯類；丁酮，環乙酮，甲基異丁基甲酮等之酮類； 二氯甲烷，1，2 —二氯乙烷，三氯甲烷等之氯化烴類；二甲 基甲烷胺等之氨基化合物；環乙烷等之烴類；四氫呋喃， 乙醚，二氧雜環乙烷等之醚類·，乙醇，η —丙醇，異丙醇 ，η — 丁醇，雙丙酮醇等之乙醇類；2,2,3,3 —四氟丙醇等 之氟系溶劑；甘醇單甲醚，甘醇單乙醚，丙二醇單甲醚等 之已二醇醚類等。該等溶劑可考慮所使用之有機色素溶解 性予以單獨或混合使用。塗抹液中亦可因應目的而添加單 項氧猝息物，氧化抑制劑，UV吸收劑，塑化劑，潤滑劑等 之各種添加劑。 上述記錄層12上之上述光反射膜18係爲常溫（20t )之 熱傳導率呈300k / W · m ~ ] · Κ — 1以上之金屬。該金屬爲 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -10- 501127 A7 B7 五、發明説明（8 ) (請先閲讀背面之注意事項再填寫本頁) 金，銀，銅以及以該等爲主之合金。上述光反射膜18乃由 噴漆法或真空蒸鍍法予以成膜。光反射膜1 8之厚度於形成 記錄標記（後述）部分爲50nm以上，較佳爲60〜300nm。又 ，將光反射膜1 8材料之熱傳導率與膜厚之積予以設呈2 X 10 — 5k / W · K — 1以上。 上述光反射膜1 8上，尙以物理性或化學性保護上述有 機色素記錄層12及光反射膜18爲目的而設置有保護層20 。該保護層20以提高耐傷性，耐濕性爲目的亦可設於透光 性基板1 4之未設有機色素記錄層1 2之側面。 保護層20之材料，一般係被廣泛使用紫外線硬化性樹 脂。將該紫外線硬化性樹脂原樣或溶解於適當溶劑調製成 塗抹液後，將該塗抹液於透光性基板1 4 ’復藉照射紫外線 予以硬化而形成保護層20。該等塗抹液中依據目的亦可添 加抗靜電劑，氧化抑制劑，紫外線吸收劑等之各種添加劑 。保護層20之之層厚爲0.1〜100// m左右。 經濟部智慧財產局員工消費合作社印製 如此所得光記錄媒體1 〇之記錄乃由下述光記錄裝置30 ，例如以記錄光使用具770〜790 nm範圍波長或具630〜 660 nm範圍波長之半導體雷射束，令光記錄媒體10以定線 速度或定角速度轉動，對有機色素記錄層12照射其適合之 雷射束促使有機色素變質而進行。再生時，則藉讀取有機 色素變質部分與未變質部分之雷射光反射光量差而進行。 上述光記錄裝置30爲CD - R記錄器，係介主軸伺服 機構31由主軸馬達32驅動光記錄媒體（磁碟）10以所定線性 速度之條件轉動，且藉自雷射器36之雷射束對光記錄媒體（ 本^紙^尺度適用中周國家標準（€奶）六4規格（210父297公釐) 一 ' -11 - 501127 A7 ______B7_ 五、發明説明（9 ) 磁碟）10，將資訊記錄於如上述形成之記錄層12。 (請先閲讀背面之注意事項再填寫本頁) 上述雷射器36即對應應記錄之資訊，由雷射激勵器38 予以控制圖1，圖3所示虛擬記錄單元（容後詳述）40之每一 雷射束之照射時間，例如雷射脈衝。 圖2之符號42爲含有物鏡42A及半透明反射鏡42B之 記錄光學系統。物鏡42A乃由焦距跟蹤伺服機構44加以焦 距跟蹤控制促使雷射束聚光於記錄層12。又，物鏡42A及 半透明反射鏡42B亦被移送伺服機構46予以控制而同步與 磁碟1 0之轉動以所定速度自其內周側移至外周側。 上述主軸伺服機構3 1，雷射激勵器38，焦距跟蹤伺服 機構44，移送伺服機構46係由控制裝置50所控制。記錄 層12應記錄之資料（資訊）則被輸入於控制裝置50。 其次，就上述虛擬記錄單元40及被記錄於該虛擬記錄 單元40之記錄標記加以說明。 經濟部智慧財產局員工消費合作社印製 該虛擬記錄單元係被規定於光記錄媒體徑向之單位幅 度及轉向之單位長度。且單位幅度被設成雷射束之束腰直 徑以下，而是可選擇磁碟1 0之磁道間距或凹槽幅度等之任 意幅度。 本實施形態例之虛擬記錄單元40乃如圖1所示，沿磁 碟10之轉動方向即圓周方向，以比光束徑（束腰直徑）D較 短長度（圓周方向長度），且幅度等於凹槽16被規定於上述 凹槽1 6內，而沿圓周方向加以連續性假設者，藉將雷射束 照射於各虛擬記錄單元40，則對應需記錄資訊可形成圖3 模式性例示之記錄標記48A〜48B。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) " -12- 501127 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（10 ) 在此，自上述雷射器所射出雷射束之在記錄層12位置 之光束徑D雖被設成大於上述虛擬記錄單元40，惟藉適當 選擇記錄層1 2之材料，係在雷射束中心部對應雷射照射時 間可予以形成直徑相異之記錄標記48A〜48G(雷射束雖爲 圓形，卻是使光記錄媒體轉動以照射雷射束，致記錄標記 對應照射時間呈長圓形）。 因爲，經過聚焦之雷射束雖呈高斯分佈，但記錄層12 乃僅在雷射束之照射能超過某閾値部分進行記錄，故藉變 化雷射照射時間促使記錄層12之可記錄雷射束光點尺寸變 化，而能形成如圖3所示之7階段記錄標記48A〜48G。 此時，各記錄標記48A〜48G之大小則被設定爲將讀 取雷射束照射於虛擬記錄單元40時反射光之光反射率呈7 階段。上述光反射率係記錄標記愈小愈大，未形成記錄標 記之虛擬記錄單元呈最大反射率，而形成有最大記錄標記 48G之虛擬記錄單兀呈最校反射率。 更詳言之，上述光反射率乃考慮各記錄標記48A〜48G 對於虛擬記錄單元40之面積比及記錄標記本身之透光率加 以設定。 記錄標記48A〜48G本身之透光率係隨記錄層12構成 材料因照射雷射束致分解變質且其折射率變化時，或記錄 層1 2厚度方向之變化量而異。所形成之記錄標記部分之透 光率如零時，則不必考慮之。 此時，如上述以光反射膜18材料乃使用熱傳導率300k /W· m— ^ K— 1以上之材料，且光反射膜18之厚度設爲 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ---------AW----Γ—1T----- (請先閱讀背面之注意事項真填寫本頁) -13- 501127 A7 B7 五、發明説明（n ) (請先閲讀背面之注意事項再填寫本頁) 5〇nm以上，並使用玻璃轉變點溫度80 °c以上160 °C以下之 材料爲透光性基板1 4，故不會由於照射雷射束時之冗餘熱 俾使透光性基板14及該透光性基板14所刻雷射引導用凹槽 1 6，或光反射膜1 8上之保護層20變形。因此不致招惹記錄 信號之劣化。 上述實施形態例雖爲將雷射照射時間予以5階段以上 變化而在記錄層1 2進行多層記錄，惟本發明並非被限定於 此，促使雷射束之照射功力或照射時間與照射功力予以變 化亦可。 上述實施形態雖將光記錄媒體1 0設爲CD - R之磁碟 ，但本發明並非被限定於此，一般亦可適用於包括DVD -R之其他光記錄媒體。 且，上述實施形態例雖是就未記錄資料等資訊之光記 錄媒體10者，惟本發明並非被限定於此，亦可適用於將資 訊予以5階段以上多層記錄之光記錄媒體。 經濟部智慧財產局員工消費合作社印製 況且，由上述光記錄裝置30予以形成記錄標記時在記 錄層12上所設定之虛擬記錄單元40之尺寸亦非被限定於如 實施形態例，可予以設成雷射束之束腰直徑以下之任意長 度。而在未具有凹槽16之光記錄媒體雖可任意設定虛擬記 錄單元40之尺寸，惟將虛擬記錄單元40予以設定與雷射束 最長照射時間時之照射能超過可促使記錄層1 2變化之閾値 時所形成之記錄標記略相同長度爲宜。 又，上述雷射束雖在記錄層12之位置被形成爲圓形， 惟如圖4所示，例如使用物鏡42A加上光束整形稜鏡42C， 本紙張尺度適用中國國家標準（CNS ) A4規格（210x297公釐） -14- 501127 A7 B7 五、發明説明（12 ) 促使光束形狀呈沿光記錄媒體1 〇移送方向較短且沿與此直 交方向較長之長圓形，或線狀亦可。此時，記錄標記49變 (請先閱讀背面之注意事項再填寫本頁) 短，故可促使虛擬記錄單元更加縮短。即可提昇記錄密度 〇 又，本光記錄媒體10係如圖1之符號52所示預先予以 具有對應信號調制段數之數目之反射率不同多數凹坑，或 藉在該光記錄媒體一部分如上述預先予以進行多層記錄， 俾使該等多數凹坑及/或多層記錄妥部分之記錄標記54具 有可個別識別該光記錄媒體之資訊，可識別是爲多層記錄 用光記錄媒體之資訊，可決定促使該光記錄媒體記錄再生 所需雷射束功力之資訊等特定資訊，且藉在該光記錄媒體 再生及/或記錄時將該特定資訊予以讀取，以識別確是多 層記錄用光記錄媒體，或個別識別其他，而能對應預先所 記錄凹坑之段數予以決定雷射束功力之段數，故可進行更 爲確實之多層記錄再生。或如圖1之符號56所示，藉予以 設定促使雷射引導用凹槽一部分中斷之凹槽中斷部亦能保 持相同效果，而該等方法則可單獨’或互相組合加以利用 經濟部智慧財產局員工消費合作社印製 【實施例】 以下，就本發明實施例1〜6與比較例1〜4對比加以 說明。在此，以光記錄媒體1 〇乃使用於記錄層1 2採用色素 之CD - R，而進行多層記錄之實驗。 本紙張尺度適用中國國家標準（CNS ) A4規格（2i〇x297公釐） -15- 501127 A7 B7 __ 五、發明説明（13 ) 【實施例1】 (锖先閱讀背面之注意事項#填寫本頁) 將花青色素溶解於氟化酒精以調製2%之記錄曾形成用 塗抹液，且將該塗抹液藉促使轉數變化於200rpm〜 5000rpm之旋轉塗抹法，予以塗抹於表面由射出成型形成有 螺旋狀預凹槽（磁道間距：1.6 μ m，預凹槽幅度：〇·35 // m，預凹槽深度·· 0.18 // m)之聚碳酸酯（帝人化成（株）製 :聚碳酸酯樹脂AD55 03)所成直徑120腿，厚度1.2画透光 性基板之預凹槽側表面，而形成自預凹槽內底部之厚度約 爲200nm之有機色素記錄層。該聚碳酸酯之玻璃轉變點溫 度爲140 °C。 其次，在有機色素記錄層上噴漆50nm膜厚之Ag(銀之 熱傳導率爲427 k / W · m — 1 · K _ 1 :物理年表）以形成光 反射膜。且在光反射膜上藉促使轉數變化於300rpm〜 4000rpm之旋轉塗抹法予以塗抹紫外線應硬化性樹脂（大曰 本墨水化學工業（株）：SD3 18)。復在塗抹後，自塗膜上方 以高壓水銀燈予以照射紫外線而形成層厚1 0 # m之保護層 〇 經濟部智慧財產局員工消費合作社印製 使用如此所得光記錄媒體進行多層記錄。多層記錄係 對以定線速度予以轉動之光記錄媒體，將雷射束使其照射 時間變化於6階段而加以照射進行記錄，再生時則以相同 定線速度予以轉動並照射lmW雷射光束，復藉檢出其反射 光加以再生。所使用之記錄·評價機爲脈衝技藝社製之 DDU(記錄波長：784nm)，記錄時乃以雷射束功率l4mW予 以記錄。又，此時之記錄線速度爲4.8m/ s ’記錄之時鐘（ 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） -16 - 501127 A7 B7 五、發明説明（14 ) 脈衝）頻率爲4MHz(250nsec)。 (請先閱讀背面之注意事項再填寫本頁) 對本光記錄媒體，將記錄時之雷射照射時間分別設於 (1) 50 nsec，（2) 80 nsec，（3) 110 nsec，（4) 140 nsec ’（5) 170 nsec，（6) 200 nsec而進行多層記錄。將各自之單一信 號予以記錄於磁碟1周緣。 如此進行記錄，將所記錄信號之振動値取入於Le Croy 製數位示波器LC — 534EL加以測定結果，記錄時之雷射照 射時間不同所致之變動極小而良好。 此次所用振動値之測定機，如考慮習知之由二進制記 錄再生方法予以記錄時，可判斷振動値如在10%以下則能 進行良好之記錄。 【實施例2】 除將Ag製光反射膜之膜厚予以變化爲100nm之外，係 與實施例1同樣條件製作光記錄媒體，而進行多層記錄。 記錄條件與實施例1相同。且對所記錄信號之振動値進行 同樣測定。 經濟部智慧財產局員工消費合作社印製 【實施例3】 將光反射膜材料以Au(金之熱傳導率爲318 1^/\¥· m — 1 · K — 1 :物理年表）爲之以外，與實施例1同樣條件製 作光記錄媒體，進行多層記錄。記錄條件與實施例1相同 。並對所記錄信號之振動値進行同樣測定。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X29*7公釐〉 -17- 501127 經濟部智慧財產局員工消費合作社印製 A7 B7 _ ................ 丨丨丨丨丨丨 ........................................................................................................................................................................................................................................................丨丨丨丨丨丨丨丨丨 丨丨丨丨丨丨丨丨丨丨丨丨| 丨丨丨丨丨丨丨丨丨丨 ............................................. 丨丨 丨 五、發明説明（15 ) 【實施例4】 將光反射膜厚設爲l〇〇nm以外，與實施例3同樣條件製 作光記錄媒體，以進行多層記錄。記錄條件與實施例1相 同。且對所記錄信號之振動値亦予以進行同樣測定° 【實施例5】 將光反射膜材料以Cu(銅之熱傳導率爲4011:/，· m — 1 · K — 1 :物理年表）爲之以外，與實施例1同樣條件製 成光記錄媒體，而進行多層記錄。記錄條件與實施例1相 同。並對所記錄信號之振動値進行同樣測定。 【實施例6】 將透光性基板材料以聚烯樹脂（日本ΖΕΟΝ(株）製： ΖΕΟΝΕΧ280)爲之以外，與實施例1同樣條件製成光記錄媒 體，而進行多層記錄。 該聚烯樹脂之玻璃轉變點溫度爲1 23 t。 記錄條件與實施例1相同。 對於所記錄信號之振動値亦同樣進行測定。 【比較例1】 除將A g膜厚變更爲4 0 n m之外，與實施例1同樣條件製 作光記錄媒體，並進行多層記錄。 所記錄信號之振動値同樣予以測定結果，知道雷射照 射日寸間特別長時偏號品質有問題。 本i張尺度適财關家縣（CNS ) M規格（21Gx297公董）-一 ------- -18 - „IT.. (請先閱讀背面之注意事項再填寫本頁} 501127 A7 B7 五、發明説明（16 ) 【比較例2】 (請先閲讀背面之注意事項再填寫本頁) 除將Cu膜厚變更爲40nm之外，與實施例5同樣條件製 作光記錄媒體，並進行多層記錄。所記錄信號之振動値亦 同樣予以測定。 【比較例3】 將反射膜變更爲A1(鋁之熱傳導率爲237 k / W · m _ 1 • K — 1 :物理年表）爲之以外，與實施例2同樣條件製成光 記錄媒體，而進行多層記錄。 對所記錄信號之振動値亦同樣予以測定。 【比較例4】 除將比較例1之基板材料數爲玻璃之外，以同樣條件 製成光記錄媒體，而進行多層記錄。 經濟部智慧財產局員工消費合作社印製 又，將玻璃上之預凹槽形狀設成與實施例1相同’以 凹槽形成方向而採用電漿蝕刻法。記錄條件與實施例1相 同。對於所記錄信號之振動値亦同樣予以進行測定。 將以上結果之振動値與光反射膜特性及雷射照射時胃 之關係顯示表1。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -19- 501127 五、發明説明（17 ) 【表1】 實® 1例 比較例 1 2 3 4 5 6 1 2 3 4 光反射膜 銀 銀 金 金 銅 銀 銀 銅 鋁 銀 膜厚(nm) 50 100 50 100 50 50 40 40 100 40 膜厚X熱傳導率 2.1 4.3 1.6 3.1 2.0 2.1 1.7 1.6 2.4 1.7 基板 PC PC PC PC PG PO PC PC PC 玻 璃 照射時間 振 動 値 (%) (1) 6.9 5.8 7.9 7.2 7.5 7.0 9.5 10.1 9.7 7.4 (2) 7.2 5.9 8.2 7.5 8.1 7.4 10.5 10.8 10.1 7.4 (3) 7.4 6.2 8.4 7.6 8.4 7.7 11.5 11.7 10.7 7.6 (4) 7.9 6.4 8.8 7.9 8.6 8.1 11.8 12.8 11.4 7.7 (5) 8.1 6.6 9.5 8.1 8.8 8.5 12.4 13.5 12.4 8.0 (6) 8.4 6.9 9.8 8.5 8.9 8.8 12,9 14.1 12.7 8.1 (請先閱讀背面之注意事項再填寫本頁) 【發明效果】 經濟部智慧財產局員工消費合作社印製 藉使雷射束之照射時間予以5階段以上變化而對具色 素記錄層之光記錄媒體進行照射，將供給記錄之資料予以 多層記錄之記錄方法，乃可沿有機色素記錄層之反射率變 化之深度方向實行5階段以上之多層記錄。此時，亦能防 止隨伴雷射照射之冗餘熱所致透光擤基板或凹槽之變形’ 進而防止記錄信號之劣化。 本紙張尺度適用中國國家標準（CNS ) A4規格（2i〇X297公嫠） -20- 經濟部智慧財產局員工消費合作社印製 501127 A7 B7 五、發明説明（18 ) 【圖示之簡單說明】 圖1爲顯示本發明實施形態例有關光記錄媒體要部之 一部分剖面斜視圖 圖2爲對同一光記錄媒體使用雷射束予以記錄資訊之 光記錄裝置方塊示意圖 圖3爲藉同一光記錄裝置在記錄層形成記錄標記時t 該記錄標記與虛擬記錄單元及 其光反射率之關係模式示意圖 圖4爲將照射虛擬記錄單元之雷射束設成其丨也开彡$ _ 之槪略斜視圖 【符號之說明】 ----------搛----Μ——IT------ (請先閲讀背面之注意事項再填寫本頁) 10 · ••光記錄媒體 12 · • •記錄層 14 · ••透光性基板 16· •.凹槽 18 · ••光反射膜 20 · • •保護層 30 * ••光記錄裝置 32 · •.主軸 34 · ••磁碟 36 · •.雷射器 ‘ 38· ••雷射激勵器 40 · ••虛擬記錄單元 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） •21 - 501127 A7 B7 五、發明説明（19 ) 經濟部智慧財產局員工消費合作社印製 42 · · •記錄光學系統 42A · • •物鏡 42B · ••半透明反射鏡 42C · • •光束整形稜鏡 44 · · •焦距跟蹤伺服機構 4 6· · •移送伺服機構 48A〜 48G，49，54 · · •記錄標記 52 · · •凹坑 5 6· · •凹槽中斷部 D · · •光束徑 (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 ) A4規格（210X297公釐） -22-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 501127 A7 _ B7 V. Multi-layer record of the invention description (5), and the transparent substrate is a thermoplastic resin with a glass transition point (Tg) of 80 ° C or more and 60 ° C or less The reflective film is a metal having a thermal conductivity of 300 k / W · m 1 .K ... or more, and the film thickness of the recording mark portion is 50 nm or more. (2) The optical recording medium of the above (1) is also characterized in that the product of the thermal conductivity and film thickness of the reflective film material is 2 X 10-5k / W · K-1 or more. That is, if the reflective film is made of a material with a thermal conductivity lower than 300k / W · m 1 · K — 1, or when the thickness of the reflective film is less than 50nm, the redundant heat will make the substrate or laser guide carved on the substrate. Deformation of the grooves further deforms the protective film on the reflective film, causing deterioration of the recording signal. This effect is affected by the glass transition point temperature of the substrate material engraved with the laser guide groove. When using materials such as glass with high glass transition point temperature, no deformation due to heat is seen. However, when using a material with a glass transition point temperature of 80 ° C to 1 60 ° C, it is found that this effect is greatly affected. The effect of such thermal diffusion has also been confirmed to be particularly great in multilayer recording in which the recording mark is close to the recording direction. Although the conventional optical recording media also has the influence caused by the heat during recording, it can be inferred in the multi-layer recording; because the recording marks in the direction of the incoming line to increase the recording density are close, it is more easily affected than in the past. Here, the size of the recording mark refers to the amount of change in the refractive index when the constituent material of the recording layer is decomposed and degraded due to laser beam irradiation, or when the light transmittance is changed due to the change in the thickness direction. The meaning of the amount of change. This paper size applies to Chinese National Standard (CNS) A4 specifications (210X 297 mm) --------- Φ --- I, I—1T ----—— Dance (Please read the Please fill in this page again for the matters needing attention) -8- 501127 A7 ____B7_ 5. Description of the invention (6) And the above-mentioned optical recording medium can also be constructed as follows. (Please read the precautions on the back before filling this page) (3) The unit length of the above virtual recording unit is set to be equal to the length of the recording mark formed by laser beam irradiation which is slightly equal to the above maximum irradiation time (1) or (2) Light recording medium. (4) A laser beam guiding groove is provided along the recording layer, and the virtual recording unit is located in the groove, and the unit width is slightly the same as that of the upper groove (1), (2) or (3) an optical recording medium. (5) The unit length of the virtual recording unit is set to any one of the optical recording media (1) to (4) characterized by the diameter below the beam waist of the reading laser beam. (6) A part of the above-mentioned recording layer is any one of the optical recording media (1) to (5), which has been previously recorded with multiple layers of information. (7) At least one of the above-mentioned virtual recording unit and the information portion that has been multi-layered recorded is any one of (1) to (6) characterized by the specific information representing the multi-layer optical recording medium. (8) A groove for guiding a laser beam is provided along the recording layer, and a part of the groove is an optical recording medium of any one of (1) to (7) characterized by a discontinuity. Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs [Inventive Embodiments] The following describes embodiments of the present invention in detail with reference to the drawings. The optical recording medium 10 related to the embodiments of the present invention is used in the recording layer 12 The CD_R of the pigment contains: a light-transmitting substrate 14 and a laser beam formed by covering one side of the light-transmitting substrate 14 with smearing (above the top of FIG. 1) ^ The paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) '-9-501127 A7 B7 V. Description of the invention (7) (Please read the precautions on the back before filling this page) The above-mentioned recording layer 12 with the pigment in the guide groove 16 as the main component and spray paint The light reflecting film 18 formed on the upper side of the recording layer 12 and a protective layer 20 covering the outside of the reflective film 18 are formed by a method or the like. The transparent substrate 14 is made of a thermoplastic resin having a glass transition point (Tg) of 80 ° C to 160 ° C. For example, polycarbonate resin, polymethyl methacrylate resin, epoxy resin, and polyolefin resin can be applied. Polyester resin, etc. In addition, the glass transition point is based on, for example, a differential thermal analyst of ISK7 121. The recording layer 12 provided on the translucent substrate 14 is made of an organic pigment. The organic pigment is a cyanine-based pigment, a dihydroxycyclobutenedione squarylium-based pigment, a cyclopentenetrione-based (croconium) -based pigment, an anthraquinone-based pigment, a metal azo-based pigment, and cyanine Department of pigments and so on. The solvents used in the printing of organic pigment application liquids by employees of the Intellectual Property Bureau of the Ministry of Economic Affairs can use esters such as butyl acetate and cellosolve acetate; ketones such as methyl ethyl ketone, cycloethyl ketone, methyl isobutyl ketone; Chlorinated hydrocarbons such as methyl chloride, 1,2-dichloroethane, trichloromethane; amino compounds such as dimethylmethaneamine; hydrocarbons such as cycloethane; tetrahydrofuran, ether, dioxane Ethers, ethanol, ethanol, η-propanol, isopropanol, η-butanol, diacetone alcohol, etc. ethanol; 2,2,3,3-fluorofluoro solvents such as tetrafluoropropanol; glycol Hexylene glycol ethers such as monomethyl ether, glycol monoethyl ether, propylene glycol monomethyl ether, and the like. These solvents can be used alone or in combination considering the solubility of the organic pigments used. Depending on the purpose, various additives such as oxygen quencher, oxidation inhibitor, UV absorber, plasticizer, and lubricant can be added to the application liquid. The light reflection film 18 on the recording layer 12 is a metal having a thermal conductivity of 300 k / W · m ~] · K-1 or more at normal temperature (20t). This metal is based on Chinese paper standard (CNS) A4 specification (210X297 mm) -10- 501127 A7 B7 V. Description of invention (8) (Please read the precautions on the back before filling this page) Gold, Silver, Copper and alloys based on these. The light reflecting film 18 is formed by a spray painting method or a vacuum evaporation method. The thickness of the light reflecting film 18 is 50 nm or more, and preferably 60 to 300 nm in a portion where a recording mark (to be described later) is formed. In addition, the product of the thermal conductivity and film thickness of the material of the light reflection film 18 is set to be 2 X 10-5k / W · K-1 or more. The light reflecting film 18 is provided with a protective layer 20 for the purpose of physically or chemically protecting the organic pigment recording layer 12 and the light reflecting film 18. The protective layer 20 may be provided on the side of the light-transmitting substrate 14 where the organic pigment recording layer 12 is not provided for the purpose of improving the scratch resistance and moisture resistance. The material of the protective layer 20 is generally a UV curable resin. This ultraviolet curable resin is prepared as a coating liquid as it is or dissolved in an appropriate solvent, and then the coating liquid is hardened by irradiating ultraviolet rays on the light-transmitting substrate 1 4 'to form a protective layer 20. Various additives such as antistatic agents, oxidation inhibitors, and ultraviolet absorbers can be added to these coating liquids depending on the purpose. The layer thickness of the protective layer 20 is about 0.1 to 100 // m. The records of the optical recording medium 10 thus printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs are produced by the following optical recording device 30, for example, for recording light using a semiconductor having a wavelength in the range of 770 to 790 nm or a wavelength in the range of 630 to 660 nm The laser beam rotates the optical recording medium 10 at a constant linear velocity or a constant angular velocity, and irradiates the organic pigment recording layer 12 with a suitable laser beam to promote deterioration of the organic pigment. The regeneration is performed by reading the difference in the amount of reflected laser light between the deteriorated portion of the organic pigment and the undegraded portion. The optical recording device 30 is a CD-R recorder. The optical recording medium (disk) 10 is driven by a spindle motor 32 through a spindle motor 32 to rotate at a predetermined linear speed, and the laser beam from the laser 36 is used. For optical recording media (this paper ^ paper ^ standard applies the mid-week national standard (€ milk) six 4 specifications (210 father 297 mm) a '-11-501127 A7 ______B7_ V. Description of the invention (9) disk) 10, will Information is recorded in the recording layer 12 formed as described above. (Please read the precautions on the back before filling in this page) The above-mentioned laser 36 corresponds to the information to be recorded and is controlled by the laser exciter 38. The virtual recording unit shown in Fig. 1 and Fig. 3 (more details later) 40 The irradiation time of each laser beam, such as a laser pulse. Reference numeral 42 in Fig. 2 denotes a recording optical system including an objective lens 42A and a translucent mirror 42B. The objective lens 42A is controlled by the focus tracking servo mechanism 44 to cause the laser beam to be focused on the recording layer 12. In addition, the objective lens 42A and the translucent mirror 42B are also controlled by the transfer servo mechanism 46 to move synchronously with the rotation of the magnetic disk 10 from the inner peripheral side to the outer peripheral side at a predetermined speed. The above-mentioned spindle servo mechanism 31, laser exciter 38, focal length tracking servo mechanism 44, and transfer servo mechanism 46 are controlled by the control device 50. The data (information) to be recorded in the recording layer 12 is input to the control device 50. Next, the virtual recording unit 40 and the recording marks recorded in the virtual recording unit 40 will be described. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This virtual recording unit is specified in the radial unit width and the turning unit length of the optical recording medium. And the unit width is set to be below the beam waist diameter of the laser beam, but any width such as the track pitch of the disk 10 or the groove width can be selected. As shown in FIG. 1, the virtual recording unit 40 of this embodiment example is along the rotation direction of the magnetic disk 10, that is, the circumferential direction, and has a shorter length (circumferential length) than the beam diameter (beam waist diameter) D, and the width is equal to concave. The groove 16 is defined in the above-mentioned groove 16 and the continuity assumption is made in the circumferential direction. By irradiating a laser beam to each virtual recording unit 40, corresponding to the information to be recorded, a recording mark exemplarily illustrated in FIG. 3 can be formed. 48A ~ 48B. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) " -12- 501127 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (10) Here, from the above laser Although the beam diameter D of the emitted laser beam at the position of the recording layer 12 is set to be larger than the above-mentioned virtual recording unit 40, by appropriately selecting the material of the recording layer 12, it is possible to correspond to the laser irradiation time at the center of the laser beam. 48A to 48G recording marks having different diameters are formed (although the laser beam is circular, the optical recording medium is rotated to irradiate the laser beam, so that the recording mark has an oval shape corresponding to the irradiation time). Because the focused laser beam has a Gaussian distribution, the recording layer 12 records only the part where the irradiation energy of the laser beam exceeds a certain threshold. Therefore, the recordable laser beam of the recording layer 12 is promoted by changing the laser irradiation time. The spot size changes, and 7-stage recording marks 48A to 48G as shown in FIG. 3 can be formed. At this time, the size of each of the recording marks 48A to 48G is set such that the light reflectance of the reflected light when the read laser beam is irradiated to the virtual recording unit 40 is 7 steps. The above light reflectance means that the smaller and larger the recording mark is, the virtual recording unit without the recording mark has the maximum reflectance, and the virtual recording unit having the maximum recording mark 48G has the most corrected reflectance. More specifically, the above-mentioned light reflectance is set in consideration of the area ratio of each of the recording marks 48A to 48G to the virtual recording unit 40 and the light transmittance of the recording mark itself. The light transmittance of the recording marks 48A to 48G itself varies depending on the amount of change in the thickness of the recording layer 12 when the constituent material of the recording layer 12 is decomposed and degraded due to laser beam irradiation and its refractive index changes. When the transmittance of the formed recording mark portion is zero, it need not be considered. At this time, as described above, the material for the light reflection film 18 is a material with a thermal conductivity of 300k / W · m— ^ K—1 or more, and the thickness of the light reflection film 18 is set to the size of this paper and the Chinese National Standard (CNS) A4 specification is applied. (210X297 mm) --------- AW ---- Γ—1T ----- (Please read the notes on the back and fill in this page first) -13- 501127 A7 B7 V. Description of the invention (N) (Please read the precautions on the back before filling in this page) The material with a glass transition point temperature of 80 ° C or more and 160 ° C or less is used as the light-transmissive substrate 1 4 or more, so it will not be affected by irradiation. The redundant heat generated during the laser beam deforms the light-transmitting substrate 14 and the laser-guiding groove 16 engraved on the light-transmitting substrate 14 or the protective layer 20 on the light reflection film 18. Therefore, it does not cause deterioration of the recording signal. Although the above embodiment example is to perform multi-layer recording on the recording layer 12 in order to change the laser irradiation time by more than 5 steps, the present invention is not limited to this, and the irradiation power or the irradiation time and the irradiation power of the laser beam are changed. Yes. Although the above-mentioned embodiment sets the optical recording medium 10 as a magnetic disc of CD-R, the present invention is not limited to this, and is generally applicable to other optical recording media including DVD-R. 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 can also be applied to an optical recording medium in which information is recorded in multiple layers of 5 or more stages. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, and the size of the virtual recording unit 40 set on the recording layer 12 when the recording mark is formed by the above-mentioned optical recording device 30 is also not limited to the embodiment, and can be set Any length below the waist diameter of the laser beam. Although the size of the virtual recording unit 40 can be arbitrarily set in the optical recording medium without the groove 16, the irradiation energy when the virtual recording unit 40 is set and the longest irradiation time of the laser beam exceeds the recording layer 12 can be changed. It is preferable that the recording marks formed at the threshold are slightly the same length. In addition, although the above laser beam is formed in a circular shape at the position of the recording layer 12, as shown in FIG. 4, for example, an objective lens 42A and a beam shaping 稜鏡 42C are used. This paper size applies the Chinese National Standard (CNS) A4 specification. (210x297 mm) -14- 501127 A7 B7 V. Description of the invention (12) Promote the shape of the light beam to be an oval that is short along the optical recording medium 10 and long in the direction orthogonal to it, or linear . At this time, the record mark 49 becomes shorter (please read the precautions on the back before filling in this page), which can make the virtual record unit shorter. That is, the recording density can be improved. Furthermore, as shown by symbol 52 in FIG. 1, the optical recording medium 10 is provided with a plurality of pits having different reflectances corresponding to the number of signal modulation segments in advance, or a portion of the optical recording medium is borrowed as described above. Multi-layer recording is performed in advance, so that the recording marks 54 of the majority of the pits and / or the multi-layer recorded portions have information that can individually identify the optical recording medium, and can be identified as the information of the optical recording medium for multi-layer recording, which can be determined. Promote the optical recording medium to record specific information such as laser beam power required for reproduction, and read the specific information during reproduction and / or recording of the optical recording medium to identify that it is indeed an optical recording medium for multi-layer recording , Or individually identify others, and can determine the number of laser beam power corresponding to the number of pits recorded in advance, so more accurate multi-layer recording and reproduction can be performed. Or, as shown by symbol 56 in FIG. 1, the groove interruption portion that is set to cause a part of the laser guide groove to be interrupted can also maintain the same effect, and these methods can be used individually or in combination with each other to utilize the intellectual property of the Ministry of Economic Affairs. Printed by the Bureau's Consumer Cooperatives [Example] Hereinafter, the comparison between Examples 1 to 6 of the present invention and Comparative Examples 1 to 4 will be described. Here, a multi-layer recording experiment was performed using an optical recording medium 10 for the recording layer 12 using CD-R as a pigment. This paper size applies to China National Standard (CNS) A4 specification (2i0x297 mm) -15- 501127 A7 B7 __ V. Description of the invention (13) [Example 1] (锖 Please read the notes on the back first # Fill this page ) Dissolve the cyanine pigment in fluorinated alcohol to prepare 2% of the application liquid for record formation, and apply the application liquid to the surface by a spin coating method that promotes a change in rotation speed from 200 rpm to 5000 rpm. Spiral pregroove (track pitch: 1.6 μm, pregroove width: 0.35 // m, pregroove depth ·· 0.18 // m) polycarbonate (made by Teijin Kasei Co., Ltd .: polycarbonate) Ester resin AD55 03) formed a 120-foot diameter, 1.2-thick side surface of the pre-groove side of the translucent substrate, and formed an organic pigment recording layer with a thickness of about 200 nm from the bottom of the pre-groove. The glass transition temperature of this polycarbonate is 140 ° C. Second, Ag (a silver thermal conductivity of 427 k / W · m — 1 · K _ 1: physical chronology) was spray-painted on the organic pigment recording layer to form a light reflecting film. UV-curable resin is applied to the light-reflective film by a spin-coating method that changes the number of revolutions from 300 rpm to 4000 rpm (Dayue Ink Chemical Industry Co., Ltd .: SD3 18). After coating, a high-pressure mercury lamp was irradiated with ultraviolet rays from above the coating film to form a protective layer with a thickness of 10 # m. 〇 Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. Multi-layer recording was performed using the optical recording medium thus obtained. The multi-layer recording system records the optical recording medium that rotates at a fixed linear velocity, changes the irradiation time of the laser beam to 6 stages, and irradiates it for recording. During reproduction, it rotates at the same linear velocity and illuminates the lmW laser beam. Re-detect the reflected light to regenerate it. The recording and evaluation machine used was a DDU (recording wavelength: 784 nm) manufactured by Pulse Technology Co., Ltd., and was recorded at a laser beam power of 14 mW. Also, the recording linear velocity at this time is 4.8m / s. The clock for recording (this paper size applies the Chinese National Standard (CNS) A4 specification (210X 297mm) -16-501127 A7 B7 V. Description of the invention (14) Pulse ) The frequency is 4MHz (250nsec). (Please read the precautions on the back before filling this page) For this optical recording medium, set the laser irradiation time at (1) 50 nsec, (2) 80 nsec, (3) 110 nsec, (4) 140 nsec '(5) 170 nsec, (6) 200 nsec for multi-layer recording. Each single signal is recorded on the periphery of the disk 1. Record in this way, take the vibration of the recorded signal into a digital oscilloscope LC-534EL made by Le Croy and measure the results. The change caused by the different laser irradiation time during recording is very small and good. If the vibration measuring device used this time is considered to be recorded by the binary recording and reproduction method, it can be judged that the vibration recording can be well recorded if it is below 10%. [Example 2] An optical recording medium was produced under the same conditions as in Example 1 except that the film thickness of the Ag reflective film was changed to 100 nm, and multilayer recording was performed. The recording conditions are the same as in Example 1. The same is done for the vibration chirp of the recorded signal. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs [Example 3] Except for Au (the thermal conductivity of gold is 318 1 ^ / \ ¥ · m — 1 · K — 1: physical chronology) An optical recording medium was produced under the same conditions as in Example 1, and multilayer recording was performed. The recording conditions are the same as in Example 1. The same was done for the vibration chirp of the recorded signal. This paper size applies to China National Standard (CNS) A4 (210X29 * 7mm) -17- 501127 Printed by A7 B7 _ .............. .. 丨 丨 丨 丨 丨 丨 ............................ ........................................ ........................................ ........................................ ........................................ ... 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 | 丨 丨 丨 丨 丨 丨 丨 丨 丨 ............ ....................... 丨 丨 丨 Fifth, the description of the invention (15) [Example 4] The thickness of the reflective film was set to other than 100 nm, and an optical recording medium was produced under the same conditions as in Example 3 to perform multi-layer recording. The recording conditions were the same as in Example 1. The vibration of the recorded signal was also measured in the same manner. Example 5 The same conditions as in Example 1 were used except that the light reflection film material was made of Cu (the thermal conductivity of copper is 4011: /, · m — 1 · K — 1: physical chronology). An optical recording medium was prepared, and multilayer recording was performed. The recording conditions were the same as in Example 1. The vibration chirp of the recorded signal was measured in the same way. [Example 6] A translucent substrate material was made of a polyolefin resin (Japanese ZOON (Japan) Co., Ltd .: Except for ZEENEX280), a multilayer optical recording medium was prepared under the same conditions as in Example 1. The glass transition point temperature of this polyolefin resin was 1 23 t. The recording conditions were the same as in Example 1. About The vibration 値 of the recorded signal was measured in the same manner. [Comparative Example 1] An optical recording medium was produced under the same conditions as in Example 1 except that the Ag film thickness was changed to 40 nm, and multilayer recording was performed. The vibration radon is also measured, and it is known that there is a problem with the quality of the special long-term partial sign during the laser irradiation day. This scale is suitable for Guancai County (CNS) M specification (21Gx297 public director)-a ------ --18-„IT .. (Please read the notes on the back before filling this page} 501127 A7 B7 V. Description of the invention (16) [Comparative Example 2] (Please read the notes on the back before filling this page) Except Change Cu film thickness to 4 Except for 0 nm, an optical recording medium was produced under the same conditions as in Example 5, and multilayer recording was performed. The vibration chirp of the recorded signal is also measured. [Comparative Example 3] An optical recording medium was prepared under the same conditions as in Example 2 except that the reflection film was changed to A1 (the thermal conductivity of aluminum is 237 k / W · m_1 • K-1: physical chronology). Multi-layer recording is performed. The vibration chirp of the recorded signal is also measured. [Comparative Example 4] An optical recording medium was produced under the same conditions except that the number of substrate materials of Comparative Example 1 was glass, and multilayer recording was performed. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Furthermore, the shape of the pre-grooves on the glass was set to be the same as in Example 1 ', and the plasma etching method was used in the groove formation direction. The recording conditions are the same as in Example 1. The vibration chirp of the recorded signal was also measured in the same manner. Table 1 shows the relationship between the vibration chirp of the above results and the characteristics of the light reflecting film and the stomach during laser irradiation. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -19- 501127 V. Description of the invention (17) [Table 1] Real ® 1 comparative example 1 2 3 4 5 6 1 2 3 4 Light reflection Film Silver Silver Gold Gold Copper Silver Silver Copper Aluminum Silver Film Thickness (nm) 50 100 50 100 50 50 40 40 100 40 Film Thickness X Thermal Conductivity 2.1 4.3 1.6 3.1 2.0 2.1 1.7 1.6 2.4 1.7 Substrate PC PC PC PC PG PO PC PC PC Vibration 値 (%) (1) 6.9 5.8 7.9 7.2 7.5 7.0 9.5 10.1 9.7 7.4 (2) 7.2 5.9 8.2 7.5 8.1 7.4 10.5 10.8 10.1 7.4 (3) 7.4 6.2 8.4 7.6 8.4 7.7 11.5 11.7 10.7 7.6 (4) 7.9 6.4 8.8 7.9 8.6 8.1 11.8 12.8 11.4 7.7 (5) 8.1 6.6 9.5 8.1 8.8 8.5 12.4 13.5 12.4 8.0 (6) 8.4 6.9 9.8 8.5 8.9 8.8 12,9 14.1 12.7 8.1 (Please read the notes on the back before filling this page ) [Effect of the invention] The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints that the irradiation time of the laser beam is changed by more than 5 steps to irradiate the optical recording medium with a pigmented recording layer, and the recorded information is recorded in multiple layers Recording method The implementation of the above multi-layer recording stage 5 in the reflectance of the organic dye recording layer changes in the depth direction. At this time, it is also possible to prevent the deformation of the light-transmissive substrate or the groove caused by the redundant heat accompanied by the laser irradiation ', thereby preventing the deterioration of the recorded signal. This paper size applies Chinese National Standard (CNS) A4 specification (2i × 297 gong) -20- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 501127 A7 B7 V. Description of the invention (18) [Simplified illustration of the diagram] Figure 1 is a cross-sectional perspective view showing a part of a relevant part of an optical recording medium according to an embodiment of the present invention. FIG. 2 is a schematic block diagram of an optical recording device for recording information using a laser beam on the same optical recording medium. When the layer forms a recording mark, the schematic diagram of the relationship between the recording mark and the virtual recording unit and its light reflectivity is shown in FIG. 4. A slightly oblique view of the laser beam irradiating the virtual recording unit is also opened. [Explanation] ---------- 搛 ---- Μ——IT ------ (Please read the precautions on the back before filling this page) 10 · •• Optical Recording Media 12 · • • Recording layer 14 • • • Translucent substrate 16 • • Groove 18 • • • Reflective film 20 • • • Protective layer 30 * • • Optical recording device 32 • • Spindle 34 • • Disk 36 · • .Laser '38 · •• Laser Excitation Device 40 · •• Virtual recording unit This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) • 21-501127 A7 B7 V. Description of the invention (19) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 42 · • • Recording optical system 42A • • • Objective lens 42B • • • Translucent mirror 42C • • • Beam shaping 稜鏡 44 • • • Focal distance tracking servo 4 6 • • • Transfer servo 48A to 48G, 49, 54 · · • Record mark 52 · · · Pit 5 6 · · · Groove interruption D · · · Beam diameter (please read the precautions on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) -22-