1328812 Ο) 九、發明說明 • 【發明所屬之技術領域】 本發明係關於光資訊記錄媒體，更詳細而言，關於具 -· 有可印刷的標籤（label )面的光資訊記錄媒體。 【先前技術】 . 近年來，比起 CD-R/CD-RW 等的 CD (compact-disc) • ，具有數倍的記錄容量的DVD (數位（digital)多用途光 碟），作爲記錄電影等的畫像或聲音等的資訊之資訊記錄 ' 媒體，被廣泛的使用著。先前，於如此的DVD，係在與記 錄、再生光入射的側，置於相反側的假（dummy )基板的 表面（標籤面），設置藉由印表機（printer )等而可印刷 * 所希望的資訊、畫像的面（印刷層）。另外，最近，提案 :標籤面的印刷層，爲擴大至比起記錄區還要設置於內周 側的抓持區，擴大可印刷的面而提高商品價値。 • 而在具有含有有機色素的記錄層之追記型的DVD-R 或DVD-RW，記錄區與抓持區的層構成相異。因此，於印 刷層的記錄區印刷的畫像的對比（contrast )與於抓持區 印刷的畫像的對比產生差異，其結果，被指出看到如於畫 • 像有分界線般的問題β * 作爲解決如此的問題的方法，例如有報告：形成與進 行記錄再生的預刻凹軌相同形狀的凹軌至抓持區（ clamping area )，而且，於其上依序設置色素層、反射層 、接著層，藉由形成與記錄區同樣的層構造，解除記錄區 -5- (2) 1328812 與抓持區的分界線的方法（參照專利文獻1)。 〔專利文獻1〕日本特開2004-139697號公報 【發明內容】 〔發明所欲解決的課題〕 然而’如專利文獻1般地，至DVD的抓持區（ • clamping area )，形成與在記錄區進行記錄再生的預刻凹 • 軌相同形狀的凹軌，而且，於其上依序設置色素層等，作 到形成與記錄區同樣的層構造，則特別在藉由旋轉塗布法 (spin-coat)法等而形成有機色素層的情況，煩雜的操作 成爲必要，有關於製造成本的增大。 另外，中心孔（center-hall )周邊的抓持區，已知悉 ' 在安裝DVD於驅動部（drive)時，或取下時，爲應力集 中高的部分。因此，若設置含有有機色素至抓持區的記錄 層，則在應力集中高的抓持區，因爲在有機色素與反射膜 # 的界面的密合力，比起在基板與反射膜或基板與有機色素 等的其他的界面的密合力爲變小，所以形成預刻凹軌的基 板與假基板的接著性下降，該結果，有DVD破損之虞。 本發明爲爲了解決如此的問題。 • 亦即，本發明的目的係提供：印刷於標籤（label )面 • 的畫像，不因光的反射情形而產生分界線，而且，強化中 心孔（center-hall )附近的黏合強度之光資訊記錄媒體^ 〔用以解決課題的手段〕 -6 - (3) 1328812 爲了解決上述的問題，於本發明，係於抓持區，形成 • 與被形成於記錄區的預刻凹軌係相異的形狀之凹軌。 亦即，如藉由本發明，提供：黏合基板、與在對應於 基板的抓持區及記錄區的部分，設置了被印刷層的假基板 之光資訊記錄媒體；以基板係具有：形成於記錄區的記錄 • 再生用的預刻凹軌、和形成於被設置於記錄區的內周側的 . 抓持區，與預刻凹軌係形狀相異之非記錄再生用的假凹軌 • ，作爲特徵之光資訊記錄媒體。 在此，在適用本發明的光資訊記錄媒體，形成於記錄 區的預刻凹軌表面，係依序形成記錄層與反射層，一方面 • ’於被形成於抓持區的假凹軌表面，係藉由僅形成反射層 ，可將形成反射層後的，預刻凹軌的溝形狀與假凹軌的溝 ' 形狀作爲大略相同，可解除在被印刷層的記錄區與抓持區 的分界線。 另外，在適用本發明的光資訊記錄媒體，在與設置了 • 假基板的被印刷層的面係相反的面，特別是，於對應於抓 持區的部分，藉由設置至少與預刻凹軌相同形狀的溝，或 是，與假凹軌相同形狀的溝，可使基板與假基板的接著性 提商。 另外，如藉由本發明，則提供，特徵爲：具有形成： 於表面依序層積記錄層和反射層的記錄再生用的預刻凹軌 、和於表面僅層積反射層，與預刻凹軌係相異形狀之非記 錄再生用的假凹軌之基板；經由形成於反射層上的接著層 ，黏合：在與接著層相反側的面設置了被印刷層之假基板 (4) 1328812 、和基板之光資訊記錄媒體。 • 在適用本發明的光資訊記錄媒體，係如前述的，層積 記錄層和反射層後的預刻凹軌的溝深度、與僅層積反射層 的假凹軌的溝深度，大略上相等。 ' 另外，記錄層含有有機色素化合物爲理想。 接著，如藉由本發明，則爲將具有被印刷層的假基板 . 、與記錄再生用的基板，經由接著層而黏合之光資訊記錄 # 媒體，以：基板係具備：形成循軌用的預刻凹軌的記錄區 、和形成被記錄再生用的假凹軌的抓持區；假凹軌的溝形 ' 狀，係爲了使得假凹軌上形成反射層後的溝形狀和和於預 • 刻凹軌上形成含有有機色素的記錄層及反射層後的溝形狀 是大略相等，而被形成爲淺於預刻凹軌的溝深度，作爲特 ' 徵之光資訊記錄媒體。 在此，在適用本發明的光資訊記錄媒體，係具有特徵 爲：減少了印刷在對應於形成於假基板上的被印刷層的抓 • 持區的部分之畫像的對比（contrast )、與印刷在對應於 記錄區的部分之畫像的對比之差。 而且，如藉由本發明，則提供：係黏合了具有記錄層 的基板與假基板之光資訊記錄媒體， 其特徵爲：具有：設置於基板表面的記錄區，層積記 錄層的循軌用的預刻凹軌、和設置於基板表面的抓持區， 比預刻凹軌淺的形成之假凹軌、和於假基板的標籤面，爲 了用以覆蓋對應於抓持區及記錄區的部分而設置之被印刷 層之一種光資訊記錄媒體。 -8- (5) 1328812 在此，適用本發明的光資訊記錄媒體，其特徵爲具有 :於預刻凹軌上，依序形成含有有機色素的記錄層及反射 層之記錄區的反射光量、與於假凹軌上只形成反射層之抓 持區的反射光量爲大體上相等；可解決在被印刷層的記錄 區與抓持區產生分界線的問題。 〔發明的效果〕 如藉由本發明，則強化光資訊記錄媒體的中心孔（ center-hall )附近的黏合強度，而且，印刷於標籤（label )面的畫像，不因光的反射情形而產生分界線。 【實施方式】 ' 以下，關於用以實施本發明的最佳形態（實施的形態 )，根據圖面而說明。而且，本發明，不限定於以下的實 施形態，在其要旨的範圍窗可各種變形而實施。另外’使 • 用的圖面，係爲了說明本實施形態而使用’不是表示實際 的大小。 第1圖，爲用以說明適用本發明的實施形態之光資訊 記錄媒體的圖。第1 (a)圖，爲從光資訊記錄媒體100的 記錄、再生光入射的基板10的訊號面側所見的平面圖。 第1 (b)圖，爲從光資訊記錄媒體100的設置被印刷層 17的假基板16的標籤面側所見的平面圖。 如第](a)圖所示的，光資訊記錄媒體]〇〇係具有圓 形的基板10，於基板10的中心部係設置中心孔11。於中 -9- (6) 1328812 4、孔11的周圍，係將：在射出成型成爲模具（mould )的 壓合部分之印模（stamPer)壓合溝12、和在將光資訊記 錄媒體1〇〇安裝於特定的驅動部（drive)時’使用的堆疊 肋（stack-rib) 13，設置至同心圓狀。如第1 (a)圖所示 的，於堆疊肋13的內周側形成抓持區14，於堆疊肋13的 外周側形成記錄區1 5。 接著，如第1 (b)圖所示的，於光資訊記錄媒體1〇〇 φ 的標籤面側’係設置層積於基板10上的假基板16，以印 表機（printer )等而可印刷的被印刷層1 7，如覆蓋抓持區 14及記錄區15般地形成。 接著，說明關於光資訊記錄媒體100的層構造》 第2圖，爲用以說明光資訊記錄媒體100的抓持區14 ' 的附近的剖面圖。如第2圖所示的，光資訊記錄媒體100 ，係具有：由設置了中心孔u的光透過性材料所構成的 基板10、和與基板10相同的材料形成的假基板16，經由 • 接著層18而黏合的構造。於基板10的表面，係具有特定 形狀的循軌（tracking)用的預刻凹軌（pre-groove) 101 ，被形成至同心圓狀或螺旋狀。另外，於從堆疊肋13延 伸至外周側的記錄區1 5，係按照必要而設置記錄了資訊的 預刻凹坑（pre-pit)或是爲了循軌用或位址（address)用 的特定的圖案。 於基板10的表面的抓持區14，係於到內周側的印模 壓合溝12的範圍，形成與被形成於記錄區〗5的預刻凹軌 係形狀相異的假凹軌102 » -10- (7) 1328812 於被形成於記錄區15的預刻凹軌101上，係依序地 層積：含有有機色素化合物的色素層103和反射層104。 —方面，於被形成於抓持區14的假凹軌102上，僅設置 反射層1 04。 於假基板16的表面，係如覆蓋基板10的抓持區14 與記錄區1 5般地，設置被印刷層1 7，成爲可以印表機（ ^ Printer )等印刷特定的畫像。假基板1 6之在接著層1 8側 φ 的面，係形成：與形成於基板10的表面的預刻凹軌101 相同形狀的溝161、和與假凹軌102相同形狀的溝162。 如第2圖所示的，在適用本實施形態的光資訊記錄媒 • 體〗00，係具有：於基板10的表面之，被形成於抓持區 14的假凹軌102的形狀，爲與被形成於記錄區15的預刻 ' 凹軌101的形狀相異之特徵。亦即，假凹軌102的深度， 係如成爲淺於預刻凹軌101的深度般地形成。 如後述地，藉由：若於預刻凹軌101的表面成膜含有 # 有機色素化合物的色素層103，則於成膜色素層]03後的 預刻凹軌101係貯存有機色素化合物，色素層103表面的 凹坑形狀，係成爲與不成膜色素層103的假凹軌102表面 的形狀大略相同。藉由色素層103表面的凹坑的形狀，與 不成膜色素層〗〇3的假凹軌102的表面的形狀成爲大略相 • 同，於這些的表面形成反射層104後的抓持區14與記錄 區15的凹坑的形狀亦成爲大略相同。 亦即，在記錄區15的色素層103表面設置了反射層 104的情況之凹坑的深度（Da)與半値寬（Wa)，係與在 -11 - (8) (8)1328812 抓持區14的假凹軌102表面，設置了反射層104的情況 的凹坑的深度（Db)與半値寬（Wb)，各個成爲大略相 同。 其結果，因爲抓持區14與記錄區15的反射光量成爲 大略相等，未觀察到印刷在對應於被印刷層1 7的抓持區 1 4的部分的畫像、與印刷在對應於記錄區1 5的部分的畫 像的分界線，解決了可看到在印刷於被印刷層1 7的畫像 有分界線的問題。 而且，作爲將假凹軌1 02的形狀，作爲形成如與成膜 色素層103後的表面凹坑的形狀大略相同的方法，係不特 別限定。例如可舉出：事先，測定於記錄區1 5的預刻凹 軌101上成膜色素層103後的形狀，根據測定了的形狀而 決定假凹軌102的形狀之方法。 另外，在適用本實施形態的光資訊記錄媒體1〇〇，係 具有：於基板10的表面之，被形成於抓持區14的假凹軌 102的表面，不形成含有有機色素化合物的色素層1〇3之 特徵。 亦即，藉由在中心孔1 1的附近的假凹軌1 〇 2表面， 不形成色素層103，提高應力集中高的抓持區14的基板 1〇與假基板16的接著性。其結果，可防止在光資訊記錄 媒體100安裝、脫離於驅動部（drive)時，中心孔1 1附 近破損。 而且’在本實施形態，係藉由在假基板16的接著層 1 8側的面，形成：與形成於基板〗〇的表面的預刻凹軌 -12- (9) 1328812 101相同形狀的溝161、和與假凹軌102相同形狀的溝162 • ，可使假基板16的接著性提高。特別是，在對應於基板 10的抓持區14的範圍’藉由形成與基板10的假凹軌102 同一形狀的溝〗62，可更提高應力集中高的抓持區14的基 板10與假基板16的接著性。 接著，說明關於構成適用本實施形態的光資訊記錄媒 _ 體1 0 0的各層的材料。 # 基板1〇係藉由光透過性材料而形成。作爲光透過性 材料，係例如可舉出：聚碳酸酯樹脂、聚甲基丙烯酸甲酯 樹脂、環氧樹脂、ABS樹脂等的合成樹脂、玻璃等。這些 若特別考慮操作的容易性，則聚碳酸酯樹脂、聚甲基丙烯 酸甲酯樹脂等爲理想。 ' 色素層103，係可將有機色素化合物溶解於特定的溶 媒而調製的色素溶液，在形成於基板10的記錄區15的預 刻凹軌101上，藉由旋轉塗布法（spin coat)等塗佈而成 # 膜。作爲有機色素化合物，例如可舉出：花菁系色素、方 酸鎗 （Squarylium ) 系色素、croconium 系色素、 Azulenium系色素 '三芳基胺系色素、蒽輥系色素、含金 屬唑系色素、二硫醇金屬錯鹽系色素、靛苯胺（ indoaniline)金屬錯體系色素、鈦菁系色素、萘鈦菁系色 素等》這些色素係即使單獨或倂用亦佳。 另外，作爲爲了調製色素溶液而使用的溶媒，係例如 可舉出：乙二醇乙醚、乙二醇甲醚、甲醇 '四氟丙醇等。 而且，於色素層103係於有機色素化合物以外，添加：氧 -13- (10) 1328812 化防止劑、二硫醇錯合物等的安定劑（quencher);硝 化纖維素、醋酸纖維素、酮類樹脂、丙烯酸樹脂、聚乙烯 縮丁醛、聚烯烴等的結合劑等亦佳。 反射層104係可將Au、Ag、Cu、Ni、Al、Pt等的金 屬或這些的合金材料，藉由真空蒸鍍法、濺鍍法（ sputtering)、離子佈植法等而形成。這些之中特別是Ag 、A1爲最佳。 φ 接著層18係可將接著劑，藉由旋轉塗布（spin-coat )、凹版塗布、噴霧塗布、滾筒式塗布（Roll Coat)等的 _ 方法而塗布於反射層1 〇4上而形成。作爲接著劑，係例如 可舉出：紫外線硬化性丙烯酸樹脂、紫外線硬化性環氧樹 脂、紫外線硬化接著劑、環氧接著劑、聚矽氧系樹脂、聚 ' 矽氧接著劑、熱熔接著劑等。 假基板16係使用與基板10相同的材料而形成爲理想 。藉由將假基板16與基板10使用相同的材料而形成，可 # 防止在黏合這些的情況時的碟片彎曲》 被印刷層1 7係藉由：將含有紫外線硬化性樹脂的水 性塗布液，塗佈於假基板16上之後，照射紫外線而使其 硬化而形成。作爲紫外線硬化性樹脂，係例如可舉出：羥 乙基甲基丙烯酸酯、羥丙基甲基丙烯酸酯、羥丁基甲基丙 烯酸酯、羥戊基甲基丙烯酸酯、苯氧基羥丙基甲基丙烯酸 酯、氯羥丙基甲基丙烯酸酯、二乙二醇單甲基丙烯酸酯、 三乙二醇單甲基丙烯酸酯、聚乙二醇單甲基丙烯酸酯、二 丙二醇單甲基丙烯酸酯、聚丙二醇單甲基丙烯酸酯、甘油 -14- (11) (11)1328812 單甲基丙烯酸酯、甘油二甲基丙烯酸酯、異戊四醇甲基丙 烯酸酯、苯基縮水甘油醚甲基丙烯酸酯、二異戊四醇五甲 基丙烯酸酯、雙酚A環氧樹脂的二甲基丙烯酸酯等的丙烯 酸樹脂等。 作爲可加於這些的樹脂之架橋性單體，係例如可舉出 :三羥甲基丙烷三甲基丙烯酸酯、丙烯基化異氰酸酯、 1,4 - 丁二醇二甲基丙烯酸酯、1，6己二醇二甲基丙烯酸酯 、新戊二醇二甲基丙烯酸酯、二環戊二苯二甲基丙烯酸酯 、異戊四醇四甲基丙烯酸酯等。 作爲被使用於硬化反應的自由基開始劑，係例如可舉 出：1·羥環己基苯基酮' 2-羥基2-甲基-卜苯基丙烷-1-酮 、2,2-二乙氧基苯乙酮、4-苯氧基·2,2·二氯苯乙酮等的苯 乙酮系、2-羥基-2-甲基苯丙酮等的苯丙酮系、2-氯蒽醌 等的蒽醌系、2,4-二乙基塞噸酮等的塞噸酮系。 〔實施例〕 以下，根據實施例，更具體的說明本實施形態。而且 ，本發明係不限定於實施例。 (實施例） 使用印模（stamper )而射出成型聚碳酸酯樹脂，成型 厚度 0.6mm、外徑 0l2〇mm、內徑（中心孔）0l5mm、折 射率1.59的圓形的基板。 於已成型的基板，係於從中心021mm的位置，形成 -15- (12) (12)1328812 印模壓合溝。印模壓合溝的外側之，設置於從中心 022mm〜034mm的範圍之抓持區，係形成具有比形成於抓 持區的溝更淺的深度之假凹軌。另外，於設置於抓持區的 外側之記錄區，係形成具有特定的深度之預刻凹軌。 於被形成於記錄區的預刻凹軌的形狀，爲軌道間距（ track-pitch) 0.74/zm、深度 160nm、半値寬 3I0nm。被形 成於抓持區的假凹軌的形狀，爲軌道間距（track-pitch ) 0.74μιη、深度 lOOnm、半値寬 250nm。 接著，僅於形成於基板的預刻凹軌上的記錄區，由中 心從03 6mm附近持續到外周，將唑系色素溶液（濃度1.2 重量％)，藉由旋轉塗佈法（spin-coat )而塗佈，成膜色 素層。於塗佈了色素層後的預刻凹軌，係貯存色素，色素 層表面的凹坑的形狀爲深度I〇〇nm、半値寬25 0nm。 接著，由基板表面的中心從022mm至0ll9mm的範圍 ，以覆蓋抓持區及記錄區兩方的方式濺鍍Ag合金，於形 成於記錄區的色素層上、和抓持區的假凹軌上，成膜厚度 1 OOnm的反射層。 以濺鍍成膜的反射層，係爲了保持厚度爲均勻的形狀 ，在抓持區之設置了反射層的假凹軌的凹坑之深度（Db) ，係與設置反射層前的假凹軌的凹坑之深度相同的1 〇〇nm ，半値寬（Wb)亦與設置反射層前的半値寬相同的25〇nm 。另外，同樣的，在記錄區之設置了反射層的色素層表面 的凹坑之深度（Da)，爲與設置反射層前的凹坑之深度相 同的lOOnm，半値寬（Wa)亦與設置反射層前的半値寬相 -16- (13) 1328812 同的2 5 Onm ° • 接著’藉由旋轉塗佈法，以覆蓋形成於抓持區及記錄 區的反射層的方式，塗佈紫外線硬化性樹脂成爲厚度10// • m而形成接著層。 ' 接著，使用聚碳酸酯樹脂而射出成型，調製具有與前 述的基板之預刻凹軌及假凹軌相同形狀的溝之假基板。調 製的假基板係厚度爲0.6mm。 # 接著，形成於假基板上的溝爲作到如朝向設置於前述 的基板上的接著層，將調製的假基板載置於接著層上。接 著，使疊合了的假基板及基板以高速旋轉，除去多餘的紫 外線硬化性樹脂。接著，藉由紫外線照射而使紫外線硬化 性樹脂固化，調製黏合了具有記錄層的基板與沒有記錄層 ' 的假基板之光資訊記錄媒體。 因爲硬化了的紫外線硬化性樹脂的折射率、與聚碳酸 酯樹脂製的假基板的折射率大略相等，所以即使於假基板 Φ 形成溝，假基板的厚度亦成爲同樣，不影響光的反射情形 〇 接著，於假基板的不形成溝之另一邊的面（標籤（ label)面側），於比起從中心021mm更外側的範圍，藉 由網版（s c r e e η )印刷法、刮刀塗布（k n i f e c 〇 a t )印刷法 ' 、旋轉塗布法等，形成白色保護層。 一方面，聚乙烯醇（日本合成化學公司製：商品名「 EG-05j )、鹼化度86_5〜89.0% ) 14份、聚氧乙烯（400 )二丙烯酸酯（共榮社化學公司製：商品名「LIGHT- -17- (14) 1328812 • ACRYLATE 9EG-AJ J 5.7份、光聚合開始劑（汽巴精化股 份有限公司（Ciba Specialty Chemicals)製：商品名「 IRGACURE2959」〇· 3份、水8 0份所構成的紫外線硬化型 的水性塗佈液。 接著，藉由旋轉塗布法，將事先調製的水性塗佈液塗 佈於形成於假基板上的白色保護層後，照射500mJ/cm2的 一 紫外線而使其硬化，形成了膜厚20/zm的墨水容納層。合 # 倂上述的白色保護層與墨水容納層而作爲被印刷層。被印 刷層係如覆蓋光資訊記錄媒體的抓持區般地，設置於假基 板的標籤面全體。而且，旋轉塗佈法的條件，係將水性塗 佈液10ml左右，滴下於白色保護層上的內周，以旋轉數 1,000 rpm塗佈於塗佈面全體，接著，增大旋轉數至2,000 ' rpm，進行甩離水性塗佈液^ 於如此地調製的假基板上的被印刷層，以噴墨印表機 (ink-jet-printer)印刷畫像，將印刷了的畫像，從標籤面 # 藉由目視而觀察。觀察的結果，未觀察到印刷於記錄區的 畫像與印刷於抓持區的畫像的分界線，解決如可見到在印 刷於被印刷層的畫像有分界線的問題。 另外，在形成於基板的抓持區的假凹軌的部分，係不 • 形成記錄層，而且，因爲對應於假基板的抓持區的部分亦 形成溝，所以在將基板與假基板，經由接著層而黏著時， 藉由提高對於接著層的表面積，可謀求提高基板與假基板 的接著強度。 而且，於本實施例，係於基板上設置了反射層時之， -18- (15) 1328812 • 如相同地（25〇nm )成爲：在抓持區的假凹軌的半値寬（ - Wb )、與在記錄區的預刻凹軌上的層積了反射層之色素 層表面的凹坑之半値寬（Wa)般地形成，但不限定於此。 亦即，在這些的半値寬爲相異的情況，係藉由適宜的 變更形成於抓持區的假凹軌的軌道間距（track-pitch )， 亦可調整軌道間距與半値寬的比例。例如：可如保持（ Wa /軌道間距（track-pitch) a)与（Wb /軌道間距（track-φ Pitch) b)的關係般地調整。藉由調整此比例，可將在以 目視觀察標籤面的情況之光的反射情形，作爲良好的狀態 【圖式簡單說明】 " 〔第1圖〕爲用以說明適用本發明的實施形態之光資 訊記錄媒體的圖。 〔第2圖〕爲用以說明光資訊記錄媒體的抓持區的附 # 近的剖面圖。 【主要元件符號說明】 10 :基板 11 :中心孔 1 2 :印模壓合溝 13 :堆疊肋 1 4 .抓持區 I 5 :記錄區 -19- (16) (16)1328812 16 :假基板 1 7 :被印刷層 1 8 :接著層 100 :光資訊記錄媒體 1 0 1 :預刻凹軌 102 :假凹軌 1 03 :色素層 1 04 :反射層 161 :溝 162 :溝[Technical Field] The present invention relates to an optical information recording medium, and more particularly to an optical information recording medium having a label surface that can be printed. [Prior Art] In recent years, a DVD (digital multipurpose disc) having a recording capacity several times larger than a CD (compact-disc) of a CD-R/CD-RW, etc., as a recording movie or the like The information recording of information such as portraits or sounds is widely used. In the case of such a DVD, the surface (label surface) of the dummy substrate placed on the opposite side to the side where the recording and reproducing light are incident is provided, and the printer can be printed by a printer or the like. The information of the hope, the face of the portrait (printed layer). Further, recently, it is proposed that the printed layer on the label side is enlarged to a grip area provided on the inner peripheral side than the recording area, and the printable surface is enlarged to increase the price of the product. • In the case of a DVD-R or DVD-RW having a recordable layer containing an organic dye, the recording area differs from the layer structure of the grip area. Therefore, the contrast of the image printed on the recording area of the printed layer differs from the image printed in the grip area, and as a result, it is pointed out that the image is like a boundary line. A method for solving such a problem, for example, there is a report that a concave rail having the same shape as a pre-notched rail for performing recording and reproduction is formed to a clamping area, and a pigment layer, a reflective layer, and then a plurality of layers are sequentially disposed thereon. The layer is formed by the same layer structure as that of the recording area, thereby releasing the boundary between the recording area-5-(2) 1328812 and the gripping area (see Patent Document 1). [Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-139697 [Claim of the Invention] [Problems to be Solved by the Invention] However, as in the case of Patent Document 1, the grip area to the DVD is formed and recorded. The pre-pits and tracks of the same shape are recorded and reproduced, and the pigment layer or the like is sequentially disposed thereon, and the same layer structure as that of the recording region is formed, in particular, by spin coating (spin- When the organic pigment layer is formed by a coat method or the like, troublesome operations are necessary, and there is an increase in manufacturing cost. In addition, the gripping area around the center-hall is known as the portion where the stress is concentrated when the DVD is mounted on the drive or when it is removed. Therefore, if a recording layer containing an organic dye to a gripping zone is provided, the adhesion zone at a high stress concentration is because the adhesion between the organic pigment and the reflective film # is compared with the substrate and the reflective film or the substrate and the organic Since the adhesion force of the other interface such as a dye is small, the adhesion between the substrate on which the pre-notched rail is formed and the dummy substrate is lowered, and as a result, the DVD is damaged. The present invention has been made to solve such problems. • That is, the object of the present invention is to provide an image printed on a label surface, which does not cause a boundary line due to reflection of light, and enhances the light intensity of the bonding strength near the center-hall. Recording medium ^ [Means for solving the problem] -6 - (3) 1328812 In order to solve the above problem, the present invention is formed in the gripping area, and is formed differently from the pre-notched trajectory formed in the recording area. The shape of the concave rail. That is, according to the present invention, there is provided an optical information recording medium in which a dummy substrate of a printed layer is provided in a portion where a substrate is bonded to a gripping region and a recording region corresponding to the substrate, and the substrate has a pattern formed on the substrate. Recording of the area • Pre-notch track for reproduction, and a scratch-shaped area formed on the inner peripheral side of the recording area, which is different from the shape of the pre-notched track system, and is not used for recording and reproducing. A light information recording medium as a feature. Here, in the optical information recording medium to which the present invention is applied, the surface of the pre-engraved rail of the recording area is formed, and the recording layer and the reflective layer are sequentially formed, on the one hand, 'on the surface of the dummy concave rail formed on the grip area By forming only the reflective layer, the groove shape of the pre-notched rail after forming the reflective layer can be substantially the same as the groove shape of the dummy concave track, and the recording area and the holding area of the printed layer can be released. Demarcation line. Further, in the optical information recording medium to which the present invention is applied, the surface opposite to the surface of the layer to be printed on which the dummy substrate is provided, in particular, at least the portion corresponding to the gripping region, is provided with at least a pre-pit. A groove of the same shape as the track, or a groove of the same shape as the dummy groove, can improve the adhesion of the substrate to the dummy substrate. Further, according to the present invention, there is provided a method of: forming a pre-pitched track for recording and reproducing on a surface in which a recording layer and a reflective layer are sequentially laminated, and a layered reflective layer on the surface, and pre-grooving a substrate of a false concave track for non-recording and reproducing of a different shape of a rail; and an adhesive layer: a dummy substrate (4) 1328812 provided with a printed layer on a surface opposite to the adhesive layer via an adhesive layer formed on the reflective layer And the light information recording medium of the substrate. In the optical information recording medium to which the present invention is applied, as described above, the groove depth of the pre-pitched track after laminating the recording layer and the reflective layer is substantially equal to the groove depth of the dummy groove of only the laminated reflection layer. . In addition, it is desirable that the recording layer contains an organic pigment compound. According to the present invention, the dummy substrate having the printed layer and the substrate for recording and reproducing are bonded to the optical information recording medium via the adhesive layer, and the substrate is provided with a pre-form for the tracking. a recording area of the notched rail, and a gripping area for forming a false concave rail for recording and reproducing; a groove-shaped shape of the dummy concave rail, in order to make the shape and shape of the groove after forming the reflective layer on the false concave rail The groove shape formed by forming the recording layer containing the organic dye on the grooved track and the reflective layer is substantially equal, and is formed to be shallower than the groove depth of the pre-notched track, and is used as a light recording medium for special light. Here, the optical information recording medium to which the present invention is applied has a feature of reducing contrast and printing of an image printed on a portion corresponding to a gripping region of a printed layer formed on a dummy substrate. The difference in contrast of the portraits corresponding to the portions of the recording area. Further, according to the present invention, there is provided an optical information recording medium in which a substrate having a recording layer and a dummy substrate are bonded, and is characterized in that: a recording area provided on a surface of the substrate, and a tracking layer for stacking the recording layer a pre-notched rail, and a gripping area disposed on the surface of the substrate, a false concave rail formed shallower than the pre-notched rail, and a label surface of the dummy substrate for covering a portion corresponding to the gripping area and the recording area And an optical information recording medium of the printed layer. -8- (5) 1328812 Here, the optical information recording medium to which the present invention is applied is characterized in that the amount of reflected light of the recording layer containing the organic dye and the recording area of the reflective layer are sequentially formed on the pre-pitched track, The amount of reflected light is substantially equal to the amount of reflected light that forms only the reflective layer on the false concave track; the problem of creating a boundary between the recording area and the holding area of the printed layer can be solved. [Effects of the Invention] According to the present invention, the bonding strength in the vicinity of the center-hall of the optical information recording medium is enhanced, and the image printed on the label surface is not caused by the reflection of light. Boundary. [Embodiment] Hereinafter, the best mode (embodiment of the embodiment) for carrying out the invention will be described with reference to the drawings. Further, the present invention is not limited to the following embodiments, and the scope of the scope of the invention can be variously modified. Further, the drawings used for the purpose of describing the present embodiment are not intended to represent actual sizes. Fig. 1 is a view for explaining an optical information recording medium to which an embodiment of the present invention is applied. Fig. 1(a) is a plan view showing the signal surface side of the substrate 10 from which the recording and reproducing light of the optical information recording medium 100 are incident. Fig. 1(b) is a plan view seen from the label side of the dummy substrate 16 on which the printed layer 17 is disposed from the optical information recording medium 100. As shown in the figure (a), the optical information recording medium has a circular substrate 10, and a center hole 11 is provided in the center portion of the substrate 10. Yuzhong-9-(6) 1328812 4, around the hole 11, is a stamp (stamPer) press-molding groove 12 which is injection-molded into a nip portion of a mold, and an optical information recording medium 1堆叠 When used in a specific drive, the stack ribs 13 used are arranged concentrically. As shown in Fig. 1(a), the gripping region 14 is formed on the inner peripheral side of the stacking rib 13, and the recording region 15 is formed on the outer peripheral side of the stacking rib 13. Next, as shown in Fig. 1(b), the dummy substrate 16 laminated on the substrate 10 is provided on the label side of the optical information recording medium 1?φ, and can be printed by a printer or the like. The printed printed layer 17 is formed like the cover region 14 and the recording region 15. Next, a second embodiment of the layer structure of the optical information recording medium 100 will be described, and a cross-sectional view for explaining the vicinity of the grip area 14' of the optical information recording medium 100 will be described. As shown in Fig. 2, the optical information recording medium 100 includes a substrate 10 made of a light-transmitting material provided with a center hole u, and a dummy substrate 16 formed of the same material as the substrate 10, and then The structure in which the layers 18 are bonded. On the surface of the substrate 10, a pre-groove 101 for tracking having a specific shape is formed to be concentric or spiral. Further, in the recording area 15 extending from the stacking rib 13 to the outer peripheral side, a pre-pit for recording information or a specific for tracking or address is provided as necessary. picture of. The gripping area 14 on the surface of the substrate 10 is attached to the range of the stamping groove 12 on the inner peripheral side to form a false concave rail 102 which is different from the shape of the pre-notched rail formed in the recording area 〖5. -10-(7) 1328812 On the pre-pitched track 101 formed on the recording area 15, a pigment layer 103 and a reflective layer 104 containing an organic pigment compound are sequentially laminated. On the other hand, on the dummy concave rail 102 formed on the gripping area 14, only the reflective layer 104 is provided. On the surface of the dummy substrate 16, for example, the grip area 14 covering the substrate 10 and the recording area 15 are provided, and the printed layer 17 is provided so that a specific image can be printed by a printer (^ Printer) or the like. On the surface of the dummy substrate 16 on the side of the layer 18 side φ, a groove 161 having the same shape as the pre-pitched track 101 formed on the surface of the substrate 10 and a groove 162 having the same shape as the dummy groove track 102 are formed. As shown in Fig. 2, the optical information recording medium 00 of the present embodiment has a shape of a dummy concave track 102 formed on the surface of the substrate 10 and formed in the gripping region 14, and The shape of the pre-engraved concave track 101 formed in the recording area 15 is different. That is, the depth of the dummy concave track 102 is formed to be shallower than the depth of the pre-pitched track 101. As will be described later, when the pigment layer 103 containing the #organic dye compound is formed on the surface of the pre-pitched track 101, the pre-pitched track 101 after the film-forming pigment layer 03 is stored as an organic dye compound. The shape of the pit on the surface of the layer 103 is substantially the same as the shape of the surface of the dummy groove 102 of the non-film-forming pigment layer 103. By the shape of the pit on the surface of the pigment layer 103, the shape of the surface of the dummy concave track 102 of the non-film-forming pigment layer 〇3 is substantially the same, and the gripping region 14 after the reflective layer 104 is formed on these surfaces is formed. The shape of the pits with the recording area 15 is also substantially the same. That is, the depth (Da) and the half width (Wa) of the pit in the case where the reflective layer 104 is provided on the surface of the pigment layer 103 of the recording area 15 are tied to the holding area at -11 - (8) (8) 1328812. The surface of the dummy concave track 102 of 14 is formed such that the depth (Db) of the pit and the half width (Wb) of the case of the reflective layer 104 are substantially the same. As a result, since the amount of reflected light of the gripping area 14 and the recording area 15 is substantially equal, an image printed on the portion corresponding to the gripping area 14 of the printed layer 17 is not observed, and is printed in correspondence with the recording area 1 The boundary line of the image of the portion of the image of the image of the printed layer 1 has a problem. Further, the shape of the dummy concave rail 102 is not particularly limited as a method of forming the shape of the surface pit after the film formation pigment layer 103 is substantially the same. For example, a method in which the shape of the dye layer 103 is formed on the pre-pit track 101 of the recording area 15 is measured, and the shape of the dummy land 102 is determined based on the measured shape. Further, in the optical information recording medium 1 of the present embodiment, the surface of the substrate 10 is formed on the surface of the dummy concave track 102 of the gripping region 14, and the pigment layer containing the organic pigment compound is not formed. 1〇3 features. That is, by the surface of the false concave rail 1 〇 2 in the vicinity of the center hole 1 1 , the pigment layer 103 is not formed, and the adhesion between the substrate 1 抓 of the grip region 14 having a high stress concentration and the dummy substrate 16 is improved. As a result, it is possible to prevent the center hole 1 1 from being damaged when the optical information recording medium 100 is attached or detached from the drive. Further, in the present embodiment, by the surface on the side of the adhesive layer 18 of the dummy substrate 16, a groove having the same shape as the pre-pitched track -12-(9) 1328812 101 formed on the surface of the substrate 形成 is formed. 161, and the groove 162 of the same shape as the dummy groove 102 can improve the adhesion of the dummy substrate 16. In particular, in the range 'corresponding to the gripping area 14 of the substrate 10', by forming the groove 62 having the same shape as the dummy concave track 102 of the substrate 10, the substrate 10 and the dummy of the holding region 14 having a high stress concentration can be further improved. The adhesion of the substrate 16. Next, the materials constituting the respective layers to which the optical information recording medium 100 of the present embodiment is applied will be described. #板1〇 is formed by a light transmissive material. The light-transmitting material may, for example, be a polycarbonate resin, a polymethyl methacrylate resin, a synthetic resin such as an epoxy resin or an ABS resin, or a glass. In view of the ease of handling, polycarbonate resin, polymethyl methacrylate resin, and the like are preferable. The pigment layer 103 is a dye solution prepared by dissolving an organic dye compound in a specific solvent, and is coated on a pre-notched rail 101 of the recording region 15 of the substrate 10 by spin coating or the like. Cloth made #膜. Examples of the organic dye compound include a cyanine dye, a Squarylium dye, a croconium dye, an Azulenium dye, a triarylamine dye, a roll dye, and an metalloazole dye. A thiol metal-salt-based dye, an indoaniline metal-based system dye, a tetraphthalocyanine dye, a naphthalene-based pigment, or the like is preferably used alone or in combination. In addition, examples of the solvent to be used for preparing the dye solution include ethylene glycol ethyl ether, ethylene glycol methyl ether, and methanol 'tetrafluoropropanol. Further, in addition to the organic pigment compound, the pigment layer 103 is added with a stabilizer such as an oxygen-13-(10) 1328812 inhibitor or a dithiol complex; nitrocellulose, cellulose acetate, and ketone. A binder such as a resin, an acrylic resin, a polyvinyl butyral or a polyolefin is also preferable. The reflective layer 104 can be formed of a metal such as Au, Ag, Cu, Ni, Al, Pt or the like, or an alloy material thereof by a vacuum deposition method, a sputtering method, an ion implantation method, or the like. Among them, Ag and A1 are the best. φ Next, the layer 18 can be formed by applying an adhesive to the reflective layer 1 〇 4 by a method such as spin-coating, gravure coating, spray coating, roll coating (Roll Coat) or the like. Examples of the adhesive agent include an ultraviolet curable acrylic resin, an ultraviolet curable epoxy resin, an ultraviolet curing adhesive, an epoxy adhesive, a polyoxynoxy resin, a poly-xylene oxide adhesive, and a hot melt adhesive. Wait. The dummy substrate 16 is preferably formed using the same material as the substrate 10. By using the same material as the dummy substrate 16 and the substrate 10, it is possible to prevent the disk from being bent when bonding these. The printed layer 17 is obtained by using an aqueous coating liquid containing an ultraviolet curable resin. After being applied onto the dummy substrate 16, it is formed by being irradiated with ultraviolet rays and hardened. Examples of the ultraviolet curable resin include hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, hydroxypentyl methacrylate, and phenoxy hydroxypropylmethyl. Acrylate, chlorohydroxypropyl methacrylate, diethylene glycol monomethacrylate, triethylene glycol monomethacrylate, polyethylene glycol monomethacrylate, dipropylene glycol monomethacrylate, Polypropylene glycol monomethacrylate, glycerol-14- (11) (11) 1328812 monomethacrylate, glycerol dimethacrylate, isopentenol methacrylate, phenyl glycidyl ether methacrylate An acrylic resin such as diisopentaerythritol pentamethyl acrylate or a bisphenol A epoxy resin dimethacrylate. Examples of the bridging monomer which can be added to these resins include trimethylolpropane trimethacrylate, acrylylated isocyanate, 1,4-butanediol dimethacrylate, and 1, 6 hexanediol dimethacrylate, neopentyl glycol dimethacrylate, dicyclopentadiphenyl dimethacrylate, pentaerythritol tetramethacrylate, and the like. Examples of the radical initiator used in the hardening reaction include: 1-hydroxycyclohexyl phenyl ketone '2-hydroxy 2-methyl-phenyl phenylpropan-1-one, 2,2-diethyl Acetophenone type such as oxyacetophenone or 4-phenoxy-2,2-dichloroacetophenone, phenylacetone or 2-chloroindole such as 2-hydroxy-2-methylpropiophenone A thioxanthene system such as lanthanide or 2,4-diethyl ketoxime. [Embodiment] Hereinafter, the present embodiment will be described more specifically based on examples. Moreover, the present invention is not limited to the embodiments. (Example) A polycarbonate resin was injection-molded using a stamper to form a circular substrate having a thickness of 0.6 mm, an outer diameter of 0.12 mm, an inner diameter (center hole) of 205 mm, and a refractive index of 1.59. The formed substrate is formed at a position of 021 mm from the center to form a -15-(12) (12) 1328812 stamping groove. The outer side of the stamping groove is provided in a gripping area ranging from 022 mm to 034 mm from the center, and a false concave rail having a shallower depth than the groove formed in the gripping region is formed. Further, in the recording area disposed outside the grip area, a pre-notched track having a specific depth is formed. The shape of the pre-pitched track formed in the recording area is a track-pitch of 0.74/zm, a depth of 160 nm, and a half-width of 3I0 nm. The shape of the dummy concave track formed in the gripping area is a track-pitch of 0.74 μm, a depth of 100 nm, and a half turn width of 250 nm. Next, the azole-based dye solution (concentration: 1.2% by weight) was applied to the recording area formed on the pre-notched rail of the substrate from the center of 03 6 mm to the periphery, by spin-coating. And coating, filming pigment layer. The pre-notched rail after the application of the pigment layer stores the pigment, and the shape of the pit on the surface of the pigment layer is a depth of 1 〇〇 nm and a half-width of 25 nm. Next, the Ag alloy is sputtered from the center of the surface of the substrate from 022 mm to 119 mm in such a manner as to cover both the gripping area and the recording area, on the pigment layer formed on the recording area, and on the false concave rail of the gripping area. , a reflective layer having a film thickness of 100 nm. The reflective layer formed by sputtering is formed to maintain a uniform thickness, the depth (Db) of the pit of the dummy concave rail in which the reflective layer is disposed in the gripping region, and the false concave rail before the reflective layer is disposed. The depth of the pit is the same as 1 〇〇 nm, and the half-turn width (Wb) is also the same as the half-turn width before the reflective layer is set to 25 〇 nm. Further, similarly, the depth (Da) of the pit on the surface of the pigment layer on which the reflective layer is provided in the recording area is the same as the depth of the pit before the reflection layer is provided, and the half width (Wa) is also set to reflect The half-width of the layer before the layer is -16- (13) 1328812 The same 2 5 Onm ° • Then 'by the spin coating method, covering the reflective layer formed in the gripping area and the recording area, the ultraviolet curability is applied. The resin was formed to have a thickness of 10// m to form an adhesive layer. Next, a polycarbonate substrate was used for injection molding to prepare a dummy substrate having grooves having the same shape as the pre-notched rails and the false-gloss rails of the substrate described above. The modified dummy substrate has a thickness of 0.6 mm. # Next, the groove formed on the dummy substrate is placed on the adhesive layer as it is placed on the substrate, and the prepared dummy substrate is placed on the adhesive layer. Then, the laminated dummy substrate and the substrate are rotated at a high speed to remove excess ultraviolet curable resin. Then, the ultraviolet curable resin is cured by ultraviolet irradiation to prepare an optical information recording medium in which a substrate having a recording layer and a dummy substrate having no recording layer 'bonded thereto are bonded. Since the refractive index of the cured ultraviolet curable resin is substantially equal to the refractive index of the pseudo substrate made of polycarbonate resin, even if the dummy substrate Φ is formed into a groove, the thickness of the dummy substrate is the same, and the reflection of light is not affected. Then, the surface (label side) on the other side of the dummy substrate where the groove is not formed is coated by a screen printing method or a knife blade in a range from the center to the outer side of 021 mm. 〇at ) Printing method, spin coating method, etc., to form a white protective layer. On the one hand, polyvinyl alcohol (manufactured by Nippon Synthetic Chemical Co., Ltd.: trade name "EG-05j", alkalinity: 86_5 to 89.0%), 14 parts, polyoxyethylene (400) diacrylate (manufactured by Kyoeisha Chemical Co., Ltd.: "LIGHT- -17- (14) 1328812 • ACRYLATE 9EG-AJ J 5.7 parts, photopolymerization starter (Ciba Specialty Chemicals): trade name "IRGACURE 2959" 〇 · 3 parts, water 80 parts of the ultraviolet curable aqueous coating liquid. Next, the aqueous coating liquid prepared in advance is applied to a white protective layer formed on a dummy substrate by a spin coating method, and then irradiated at 500 mJ/cm 2 . It is hardened by an ultraviolet ray to form an ink accommodating layer having a film thickness of 20/zm. The white protective layer and the ink accommodating layer described above are used as a printed layer. The printed layer is covered by a light-receiving information recording medium. In the same manner as in the case of the spin coating method, the conditions of the spin coating method are about 10 ml of the aqueous coating liquid, and the inner circumference of the white protective layer is dropped, and the coating is applied to the coating at a rotation of 1,000 rpm. Cloth all, then, increase When the number of rotations is 2,000 rpm, the water-repellent coating liquid is applied to the printed layer on the dummy substrate thus prepared, and the image is printed by an ink-jet printer (ink-jet-printer), and the printed image is printed. From the label surface #, it is observed by visual observation. As a result of the observation, the boundary between the image printed on the recording area and the image printed on the grip area is not observed, and it is found that the image printed on the printed layer is visible. In addition, in the portion of the dummy concave rail formed in the gripping region of the substrate, the recording layer is not formed, and since the portion corresponding to the gripping region of the dummy substrate also forms a groove, the substrate is When the dummy substrate is adhered via the adhesive layer, the adhesion strength between the substrate and the dummy substrate can be improved by increasing the surface area of the adhesive layer. Further, in the present embodiment, when the reflective layer is provided on the substrate, -18 - (15) 1328812 • If the same (25〇nm) becomes: the half-width (-Wb) of the false concave track in the gripping area, and the pigment of the reflective layer laminated on the pre-notched track in the recording area Half width of the pit on the surface of the layer (Wa) The ground is formed, but is not limited thereto. That is, in the case where the widths of the half turns are different, the track-pitch of the false concave rail formed in the grip area can be adjusted by appropriate adjustment, and can also be adjusted. The ratio of the track pitch to the half turn width. For example, it can be adjusted as follows (wa / track pitch (a) and (Wb / track pitch (track-φ Pitch) b). By adjusting this ratio The reflection state of the light in the case where the label surface is visually observed can be regarded as a good state [a brief description of the drawing] " [Fig. 1] is an optical information recording medium for explaining an embodiment to which the present invention is applied. Figure. [Fig. 2] is a cross-sectional view showing the vicinity of the grip area of the optical information recording medium. [Description of main component symbols] 10: Substrate 11: Center hole 1 2: Impression groove 13: Stacking rib 1 4 . Grab area I 5 : Recording area -19- (16) (16) 1328812 16 : False substrate 1 7: printed layer 18: adhesive layer 100: optical information recording medium 1 0 1 : pre-notched track 102: false concave track 1 03: pigmented layer 1 04: reflective layer 161: groove 162: groove
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