TW200822107A - Optical recording medium - Google Patents
Optical recording medium Download PDFInfo
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- TW200822107A TW200822107A TW096124870A TW96124870A TW200822107A TW 200822107 A TW200822107 A TW 200822107A TW 096124870 A TW096124870 A TW 096124870A TW 96124870 A TW96124870 A TW 96124870A TW 200822107 A TW200822107 A TW 200822107A
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- recording medium
- optical recording
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- 230000003287 optical effect Effects 0.000 title claims abstract description 35
- 239000010410 layer Substances 0.000 claims abstract description 65
- 239000002346 layers by function Substances 0.000 claims abstract description 16
- 230000008929 regeneration Effects 0.000 claims description 24
- 238000011069 regeneration method Methods 0.000 claims description 24
- 238000009792 diffusion process Methods 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 15
- 230000001172 regenerating effect Effects 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 2
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 2
- 235000014676 Phragmites communis Nutrition 0.000 claims 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims 1
- 150000001622 bismuth compounds Chemical class 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 229910052707 ruthenium Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 229910052714 tellurium Inorganic materials 0.000 abstract description 5
- 230000006870 function Effects 0.000 abstract description 3
- 238000002161 passivation Methods 0.000 abstract 2
- 239000011241 protective layer Substances 0.000 description 17
- 230000033458 reproduction Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 229910052681 coesite Inorganic materials 0.000 description 10
- 229910052906 cristobalite Inorganic materials 0.000 description 10
- 229910052682 stishovite Inorganic materials 0.000 description 10
- 229910052905 tridymite Inorganic materials 0.000 description 10
- 230000002265 prevention Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910002842 PtOx Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 241001674044 Blattodea Species 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229910007746 Zr—O Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 oxides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003248 secreting effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/2432—Oxygen
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25706—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing transition metal elements (Zn, Fe, Co, Ni, Pt)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
- G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/259—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on silver
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
200822107 24743pif.doc 九、發明說明： 【發明所屬之技術領域】 本發明是關於一種藉由對記錄標誌照射鐳射光而使資 訊再生的光記錄媒體，特別是關於一種具有用於使解析極 限以下的記錄標誌再生之附加構造的光記錄媒體。 【先前技術】 例如，數位視頻光碟（digital video disk, DVD)或藍 光光碟(Blu-ray disk，BD)等光記錄媒體，是在由鐳射光波 長入和物鏡的數值孔徑(numerical aperture, NA)所構成的再 生光本系統中’對記錄標諸㈣紅匕)和與其鄰接的未記錄空 間（space)的長度相同之記錄標誌列，使可再生的記錄標誌 的長度大於等於解析極限（λ/4ΝΑ)。 Ο ο 二在這種光圯錄媒體中，作為使解析極限以下之大小的 二己:”的方法，研討有—龍加信號再生機能層而 十、=内貫質上提高ΝΑ的技術，其中信號再生機能層具 有在先_媒體上使鐳射光職小的機能。 機能Cn—種藉由採用私邮5作為信號再生 化，而的細^帶㈣折射率變 的再生的超解析再生 “了 Ge2Sb2Te5以外，利用各古 信號再生機能層材料 ^或丁e另外組成的 抖也了间樣地實驗性地進行CNR高 5 200822107 24743pif.doc 的超解析再生’但都受到因提高鐳射光照射功率而造成的 媒體内升溫所帶來的影響，而使進行超解析再生時的再生 耐久性無法充分使用在實際應用上。 〔專利文獻1〕曰本專利早期公開之特開平5一258345 . 號公報 * 〔專利文獻2〕曰本專利早期公開之特開平5 一 2172 Π 號公報 f 〔非專利文獻 1〕Technical Digest 〇f Internati〇nal
Symposium on Optical Memory 2000 ^ P.224 — 225 【發明内容】 、本申睛發明的目的是可將較解析極限小的標誌進行可 ，式記錄及再生或只是再生，並可得到高再生性能（cNR 專）且可貫現南再生耐久性。 進行超解析再生的光記錄媒體，是例如圖1中的其剖 2目的-個例子所示，由記錄層、信號再生機能層（根據 〇 、'有守也被稱作罩幕層）、保護層、反射層構成。因用 2再生的鐳射光照射，而使信號再生機能層的溫度上升， =果雖，可得到超解析再生，但其在信號再生機能層和鄰 蠖層之間引起伴隨升溫的反應，並由此而對信號再 機月b層的超解析再生性能帶來影響，無法充分地確 生耐久性。 作氩上ί反應是在利用Zns* si〇2的混合物（Zns_si02) 假:保屢層材料的情況下發生，但ZnS-Si02從高透光性、 •―尤、*'生低熱膨脹性等觀點考慮，在可錄式（recordable) 200822107 24743pif.doc 〇(rewritaWe) 如圖2的剖面圖所示，在本 號再生機能層和保護層之間導入 層，而阻止或抑制信號再生機能層和保護編二!： 帶來的反應，提高再生耐久性。 1 Ο
Q Ί有一種為了改善相變化記錄膜的反復改寫次 數。=變化記錄膜鄰接地 (爹,、?、專利讀2)。由於習知方法與 =r下所示的理由，树光記錄媒‘ 料/rr/切請發财的錢再生機能層職用的材 ’、、”、、用於超解析再生的鐳射光照射時，非曰 相部分會結晶化’所以不能將其用作相^ 而且，有報告稱在利用保護層夹持Ge2Sb2Tes 中，也可進行超解析再生（參照非專利文獻υ。根據; 發明，當利用的光學系統，進行解析 極限以下1〇〇nm記錄標誌、的再生時，所得到的CNR小於 :於二S’上述專利文獻2所記述之構造的情況 ^皿:得到與上述非專利讀1她似的再生 羽述專利文獻2的相變化記錄膜部分除了作為 白知的5己錄層的使用方式以外，還可作為用於超解析再生 200822107 24743pif.doc ===，，但是無法同時充分地發揮記錄 ，至少無法單獨地形成一種實用性的 用於祕析再生的光記錄媒體。在本申請發明中，是採用 用於超解析再生的信號再生機能層利用， 广 記錄部分相組合之構成。所說的記錄部 ^疋可錄式記錄層或預先所形成的相位記錄坑洞⑽ Ο ο 由在用於超解析再生的信號再生機能 並將它們與適當的記錄部分相組合， 提：鐘；和向再生耐久性都滿足的效果，結果 &供-種可貫用化的超解析再生光記錄媒體。 舉月之j特徵和優'點能更明顯易懂，下文特 牛^以例，亚配合所附圖式，作詳細說明如下。 【貫施方式】 以下所示為用於實施本申請發明的最佳的形能。 圖2所示為利用本申請發明之用 = ，，構成例。該光記錄媒體由基板、記 == =散層、健再生絲層、_散層、_層^層 信號再生機能層的材料含有处或％ ，味著sb、Te或(sb及Te))較佳，具體地說‘二!、 Ge-Te、Ge-Sb-Te、Zn-Sb 等。而且，在其 ^
In、Ge等雜質。 、可3有Ag、 保護層的材料以znS-Si〇2較佳，且加和哪的混 8 200822107 24743pif.doc 合比（ZnS:Si〇2)最好在 9〇m〇l% ·· 10rn〇i%到 60m〇1% ·· 40mol%的範圍内。 防擴散層的材料為能夠阻止或抑制伴隨信號再生機 能層和保護層界面的升溫之反應即可，所以可利用各種各 樣的熱穩定性材料。具體地說，為Ge、Zr、Ce、Cr、Si、 A1、Τι、Ta等的氮化物、氧化物及碳化物較佳。 Ο ο 防擴散層的材料在信號再生機能層的前後未必一定 要相同，也可分別從上述材料中選擇而形成。 反射層是以調整光記錄媒體的反射率作為直主要任 務之一，所以可利用 Ag、Al、AU、Cu、Pt、PdrTi、w、 _，種金屬及其合金。而且，未必—定要_反_。 由保護層而從基板侧開始，按照記錄層、 ^再生l層及防擴散層、反射層的順序形成，但記錄 層、信號再生機能層及防擴散層的順序也可相反。而且， f利用鐳射絲記錄及再生不岐秘板 也可將反射層形成在最靠近基板側。 丁〕【月况卜 記錄層的材料只要是其光學常數會因 ，不可逆_，且在用於超解析再生的鐳=== 成於纪錄層上的記錄不會消失之材料即可。…、、、/ 基板的材料並不特別地限定， 在利用麟光的靖及再生不能 執塑膠等。 基板可為對光在光學上不透明==進行的情況下’ 也可不形成圖2的記錄層，而^ 洞的基板，使媒體為再生專用型。 无形成了记錄土几 200822107 24743pif.doc 實施例1 如圖2所示在聚碳酸酯基板上，依次形成llOnm的 由（ZnS) 85 (Sl〇2) is (亦即，ZnS-Si02 的 ZnS:Si02 為 85111〇1/〇.15111〇1/〇)所構成的保護層，4腿的由氧化翻（洲^) 和⑽2的混合物所構成的記錄層，35nm的由（ZnS) 85 (Si02) 15所構成的保護層，5麵的由氮化鍺（Ge_N)所 構成_擴散層’ iGnm的由svre所構成的錢再生機能 〇 層’ 5麵的由Ge’所構成的防擴散層，15nm的由（ZnS ) 85 (Si02) 15所構成的係護層，4Q腿的由合金 所構成的反射層。 比較例1 ”如圖1所不以作為比較例，形成不含防擴散層的用於 超解析再生的光記錄媒體。該比較例是在聚碳酸酯基板 上，依次形成liomn白勺由（ZnS) 85 (si〇2) 15所構成的保 護層，4nm的由氧化翻（Pt〇x)和恥2的混合物所構成的 ◎ 記錄層，40nm的由（ZnS)85(Si〇2) 15所構成的保護層， l〇nm的由Sbje所構成的信號再生機能層，2〇nm的由 (ZnS )μ( Si〇2 )ls所構成的保護層，4〇腿的由Ag98pdiCui 合金所構成的反射層。
在貫施例1及比較例1中，都是利用λ=4〇5ηιη、NA =〇·65的光學系統所構成的光碟評價裝置（pulstec工業股 份有限公司製造的DDU — 1000)進行測定。 對這樣形成的光記錄媒體，以線速度4.4m/s，將解析 極限以下的l〇〇nm標誌（2〇〇nm週期），在實施例}中以 10 200822107 24743pif.doc 9.5mW的鐘射光功率，在比較例1中以的錯射光 功率進行記錄。 記錄是藉由PtOx和Si02的混合物中，主要是藉由PtOx 顧和氧的熱分解所產生的在媒體内的變形而形成，且該記 錄可只進行一次。 當對記錄後的光記錄媒體照射用於再生的鐳射光功 率時’如圖3所示，實施例1及比較例1都是在超過2.〇mw
(’ 附近’可進行超解析再生；如達到3.0mW附近，則CNR 約為44dB。亦即，在新導入了防擴散層的實施例1中，也 可得到與習知的比較例1相同的高CNR特性。 在反復進行超解析再生的情況下，當測定CNR從初 期值到下降3dB的次數時，如圖4所示，在比較例1 (再 生鐳射光功率：2.8mW)中約為75,000次，在實施例丨（再 生鐳射光功率：3.0mW)中約為268,000次。亦即，因防 擴散層的導入，可以使超解析再生時的再生耐久性提高到 Q 習知的3倍以上。 才文著5己錄含有i〇〇nm標誌、（2〇〇nm週期）和 標誌' (7〇〇_週期）的複合標諸列。為了進行lOOnm標詰 部分的超，析再生，與上述圖4照射相同的再生錯射光功 率’亚測定此時來自媒體的反射光強度變化。如圖5所示， 在比較例1中’如超過㈣,_次則反射光強度下降；但 ίΓΐ二中，即使在5〇，_次以後，反射光強度基本上 夂匕。其原因被認為是由於防擴散層的導入， 防止或抑制伴隨信號再生機能層和保護層界面的升溫所產 200822107 24743pif.doc 生的反應。 實施例2 將實施例1構造中的防擴散層的材料變更為氧化梦 (Zr-O)所形成的一種光記錄媒體。在本實施例2中，^ 利用λ=405ηπι、ΝΑ=0·65的光學系統所構成的上述光= 評價裝置，以線速度6m/s，將解析極限以下的1〇〇_桿含志
Ο (200nm週期），以l〇.5mW的鐳射光功率進行記錄=… 當對記錄後的光記錄媒體照射用於超解析再2的^ 射光功率時，在3.2mW下約可得到42dB的CNR。反復進 行忒再生，當測定從初期值到下降3犯的次數時，約為 190，_次。將其與比較例1相比，可以提高到2·5件以 實施例3 —— σ 上。 在預先形成有記錄坑洞的基板上，依次形成93nm 由（ZnS) μ (Si〇2) 1S所構成的保護層，7nm的由 (Ce-Ο )所構成的防擴散層，15nm的由峋也、’ 所構成的域再生機能層，7nm㈣〜 的= 散層，93nm的由（ZnS) v (Sicn成的防擴 比較例2 ^(ZnS)85(SlQ2)15所編保護層。 〜取+ έ防擴散層的用於超解析再生的 體。該比㈣是麵先形成有記錄坑_基板上、^: 成100麵的由（ZnS) 85 (si〇2) 15所構成的保護層t形 的由Ag6.0in44sb6i〇Te28.6所構成的信號再生機能声nm 的由（ZnS) μ (Si〇2) υ所構成的保護層。 11111 在實施例3及比較例2中，測定都是利用λ=63_、 12 200822107 24743pif.doc ΝΑ = 0·60的光學系統所構成的光碟評價裝置（Pulstec工 業股份有限公司製造的DDU— 1000)。 對實施例3及比較例2，以線速度6m/s，向解析極限 以下的200mn記錄坑洞（400nm週期）照射用於超解析再 生的錯射光功率，且都是在3 4mW時，CNR為4細。 Ο ο 反復進行該再生，當測定從初期值到下降她的次 ^在比較例2中約為8，_次，在實施例3中約為2〇,_ 纽擴散層的導入，使超解析再生時的再生耐 久性約提咼到習知的2.5倍。 限定3:發彳1已以較佳實施例揭露如上、然其並非用以 :本發明之保護範圍當視後專者 【圖式簡單說明】 的構i例。4自知㈣於進行超解轉生的光記錄媒體 圖2所示為關於本申 光記錄媒體的構成例。n x月的用於進行超解析再生， 、圖3所示為用於說明本申 載波雜訊比（CNR)的闕係圖明5月之再生鐳射光功率和 圖4所示為用於 太、二过 數和载波雜訊比（CN 明發明之超解析再生反復次 圖5所示為用二:Γ係圖。 、明本申請發明之超解析再生反復次 13 200822107 24743pif.doc 數和來自媒體的反射光強度之關係圖。 【主要元件符號說明】 1 ·基板 2 :保護層 3 :記錄層 4:信號再生機能層 5 :反射層 〇 6 :防擴散層 〇 14
Claims (1)
- Ο ϋ 200822107 24743pif.doc ，，％兮列乾圏·· 預先来=用於進行超解析再生的光記錄媒體，是-種* 預先开/成有記錄坑洞的基板上 種在 於進行超解析再生的井 σ:再生枝此層層疊之用 ”:層是夾持在二層防擴散層之間；另外，节心:再 Te ;該防擴1 ’該信號再生機能層含有Sb或 2 -』用Λ 化物、氧化物或碳化物所形成。 基板上使Ρ、可騎再生料崎龍，是-種在 用於進行超解析再生號再生機能層層疊之 再生機能層是夾 層是夹持在：層 ？：月=之間，另外，該防擴散 4Te;該防擴散芦是物號再生機能層含有Sb 土如申清專利範圍第初所形成。 解析再生的光記錄媒體，其中上:伴=用於進行超 的光行超解析再生 的熱分解所產生的層是错由利用責金屬氧化物 15
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