201232532 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種光學資訊儲存媒體，且更特定言之， 種經組態以具有在記錄表面對面之光澤且吸收的：面且 以較低接觸電阻插人資訊記錄·再現裝置中及自資訊記錄_ 再現裝置中彈出的光學資訊儲存媒體。 本申請案基於且主張2〇1〇年12月8日所申請之名為「光 學資訊儲存媒體」的先前日本專利申請案第2〇ι〇_273ΐ44 號之優先權，該案之全文以引用的方式併入本文中 【先前技術】201232532 VI. Description of the Invention: [Technical Field] The present invention relates to an optical information storage medium, and more particularly to a configuration that has a gloss and absorption across the recording surface: a surface and a lower The contact resistance is inserted into the information recording/reproducing device and the optical information storage medium ejected from the information recording_reproducing device. The present application is based on and claims the priority of Japanese Patent Application No. 2 〇 〇 ΐ ΐ ΐ ΐ ΐ ΐ ΐ 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 Way of incorporating into this article [Prior Art]
所謂可印刷光碟為常用光學資訊儲存媒體類型（例如CD 及DVD-R)，其具有在用於記錄電子資料（諸如電子音樂及 視訊資料）之記錄纟面對面的印刷纟面。ep㈣面具備能 夠吸收油墨之吸墨層。印刷表面可使用例如喷墨印刷機進 行印刷。 隨著印刷技術之最新發展，類似於齒化銀攝影術的高品 質影像可印刷在可印刷光碟之該印刷表面上。特定言之， 要達成該類似於齒化銀攝影術之高品質需要吸墨層表面具 有光澤。可藉由降低吸墨層之表面粗糙度㈣來改良吸墨 層表面之光澤度。日本專利申請公開案第2〇〇2_2371们 號、第2GG3-123323號及第2GG8-251123號各自揭示該習知 可印刷光碟，其中印刷表面藉由降低吸墨層之表面粗糙度 (Ra)來達成光澤度改良。 然而，該表面粗糙度（Ra)降低之吸墨層在資訊記錄_再現 160557.doc 201232532 裝置中之記錄及再現操作期間與資訊記錄_再現襞置之組 件平面接觸而非點接觸。該平面接觸造成可印刷光碟之吸 墨層黏住資訊記錄-再現裝置之夾持機構。此外，在將可 印刷光碟插入資訊記錄•再現裝置中或自資訊記錄-再現裝 置中彈出期間，資訊記錄-再現裝置之組件與吸墨層之間 增加的接觸面積會增加其之間的接觸電阻，由此可印刷光 碟很可能可在插入/彈出操作期間黏住。 為了解決以上不足，日本專利申請公開案第2〇〇7_48389 號（「’389公開案」）提出一種具有具備吸墨層之印刷表面 的光學資訊儲存媒體，複數個平均粒徑大於吸墨層厚度且 不到吸墨層厚度兩倍的丙烯酸系珠粒在該吸墨層上均勻分 佈。所提出之儲存媒體經設計以改良印刷表面的光澤度且 在其插入/彈出操作期間降低資訊記錄_再現襞置之組件與 儲存媒體之印刷表面之間的接觸電阻。 【發明内容】 然而，，389公開案之光學資訊儲存媒體不合需要地具有 可見表面粗糙度及較差印刷品質，其由複數個具有5 至 60 μιη之平均直役且在印刷表面中均勻分佈的丙烯酸系珠 粒所造成》此外，丙烯酸系珠粒並不吸收油墨，引起儲存 媒體之較低吸收力。 鑒於以上，本發明提供一種光學資訊儲存媒體，其包含 具有較高光澤度及較高吸墨能力的可印刷印刷表面同時使 得忐夠以較低接觸電阻插入資訊記錄_再現裝置中及/或自 資訊記錄-再現裝置中彈出。 160557.doc 201232532 本發明之發明者已發現該光學資訊儲存媒體可藉由以下 來提供：在吸墨層上或上方於距吸墨層外周緣徑向向内3 mm或更少之區域中形成複數個凸塊，複數個凸塊各自具 有3 μπι至3 0 μηι之高度及〇.〇5 mm至1 mm之寬度。 本文所述之各種實施例係關於一種光學資訊儲存媒體， 其包含記錄資料的記錄層；記錄表面，在其上射入記錄/ 再現光，在配置於與記錄表面相反側之印刷表面上或上方 所形成的吸墨層；及在吸墨層上或上方於距吸墨層外周緣 徑向向内3 mm或更少之區域中所形成的複數個凸塊，複數 個凸塊各具有3叫^至” μπι的高度及0_05 mm至i mm的寬 度0 在一個態樣中’若複數個凸塊之高度各低於3 ，則在 插入/彈出操作期間資訊記錄-再現裝置與光學資訊儲存媒 體之間的接觸電阻不能降低至足以防止光學資訊儲存媒體 黏住資訊記錄.再現裝置的組件。此外，若複數個凸塊之 南度各高於30㈣，則凸塊可在正常操作期間視覺上察覺 到，引起光學資訊儲存媒體之較差外觀。 在另一態樣中，可形成之複數個㈣各具有〇〇5 _至i咖 ，寬度。若複數個凸塊之寬度各低於〇.〇5 _，則在插入/ 彈出知作期間資訊記錄·再現裝置與光學資訊 ::接觸電阻不能降低至足以防止光學資訊儲存媒=: ::錄·再現裝置的組件。此外，若複數個凸塊之寬度 起光二_ ’則凸塊可在正常操作期間視覺上察覺到，引 子貝sfl儲存媒體之較差外觀。 160557.doc 201232532 在另一態樣t，複數個凸塊可各在距印刷表面外周緣徑 向向内3 mm或更少之區域中形成。若凸塊在距印刷表面外 周緣徑向向内大於3 mm之區域中形成，則凸塊可由目視檢 查所察覺’引起光學資訊儲存媒體之較差外觀。 在一個態樣中，複數個凸塊可由在吸墨層表面上所形成 之多孔膜製成。 在一個態樣中’具有3 μηι至30 μπι之高度及〇·〇5麵至！ mm 之寬度的複數個凸塊可各形成於印刷表面上自應形成於印 刷表面上之距吸墨層外周緣3 mm内的區域中。因此，複數 個凸塊可形成於吸墨層上。 在-個態樣中，光學資訊儲存媒體另外包含可透射記錄/ 再現光之透明第-基板；置於相對記錄層與第—基板相 反側之反射膜層；形成於反射臈層上之第二基板；及形成 於第二基板上之白色油墨印刷下層中吸墨層形成於白 色油墨印刷下層上。 在一個態樣中，記錄層由有機染料製成。 【實施方式】 在y描述中，類似組件已指定相同或類似參考數字， 與其是否顯示於不同實施例中盔 貝1J甲無關。為了以清晰且簡明的 方式說明本發明之實施例，圖 圖不可月b未必成比例且某此特 徵可以在某種程度上示意之形 u A顯不。對於一個貫施例描 述及/或說明之特徵可以相m 徵了以相同方式或以類似方式用於 多個其他實施例及/或盘盆他奢 …、他貫轭例之特徵組合或代替 他實施例的特徵使用。 八 160557.doc 201232532 圖1顯示根據-個實施例之光學資訊儲存媒體之示意橫 截面圖。如所示，根據一個實施例之光學資訊儲存媒體! 包含圓形第一透明基板10、由染料膜組成之記錄㈣、反 射膜層U及圓形第二透明基板（虛設基板）13。媒體！經組態 以使用自箭頭A所表示之方向輕射至第一透明基板ι〇之記 錄表面14上的雷射束將電子資料記錄於記錄層11上。 根據-個實施例之光學資訊儲存媒體】可為所謂可印刷 光碟類型’其中在記錄表面14對面之第：透明基板13之表 面可為經組態以可使用各種方法（諸如喷墨印刷機）印刷的 印刷表面15。此外’標籤可黏附於印刷表面…印刷表面 15在其表面上具備白色油墨印刷下層16。 如圖1中所示，第一多孔膜丨7在白色油墨印刷下層1 6之 表面上形成以便覆蓋其整個表面。第一多孔膜17構成吸墨 層。此外，第二多孔膜18可在第一多孔膜17之表面上靠近 白色油墨印刷下層16之外周緣形成。第二多孔膜18形成複 數個罪近第二透明基板13外周緣之凸塊。複數個凸塊可各 形成有3 μΐη至30 μπι之高度且在距第一多孔膜口外周緣徑 向向内3 mm之區域中形成使得複數個凸塊之寬度各為〇〇5 mm至1 mm。圖！中參考數字19表示令央孔洞。 本發明之發明者已發現若複數個凸塊在第一多孔膜丨7上 距第夕孔膜17外周緣徑向向内3 mm或更少之區域中形成 使得複數個凸塊高度各為3 0〇1至30 μηι且寬度各為〇 〇5 mm 至1 mm ’則第一多孔膜17可顯示較高光澤度及較高吸墨能 力且光學資訊儲存媒體1可以較低接觸電阻插入資訊記錄- 160557.doc 201232532 再現裝置中或自資訊記錄-再現裝置中彈出。 實例 各種實例現將結合比較例描述如下。 實例1 將0.2重量份之量的乳酸及i.o重量份之量的2〇重量％石肖 酸水溶液添加至80.0重量份的6重量％聚乙烯醇水溶液（平 均聚合度為3,000; 平均矣化度為88莫耳％)中。向混合 溶液中添加17.8重量份之氣相法二氧化矽粉末（由Nippon Aerosil提供，產品名稱為AER0SIL)，同時劇烈揽拌溶 液。在使溶液在球磨機中放置一天以充分分散二氧化石夕粉 末之後，將1.0重量份之含有〇·25重量份八水合氯化氧錯之 水溶液再添加至溶液中。使所得混合溶液在球磨機中放置 一天。由此製得塗料液體Α。 射出模製聚碳酸酯樹脂以形成具有〇 6 mm厚度、12〇 mm9外徑及15 mm(p内徑之第一透明基板。第一透明基板 可具有形成於其表面上自其中央46 mn^U7 _之徑向範 圍中的V軌槽（tracking guide groove)。導軌槽可形成有 0.32 μιη之半寬度、〇 15 μηΐ2深度及〇74之間距。隨 後，將花青染料溶液旋塗在具有導執槽之基板表面上以形 成塗層乾燥塗層以形成由染料膜製成之平均厚度7〇 nm 的5己錄層。在記錄層表面上，濺鍍銀以形成厚度為100 nm 之反射膜層。 隨後，在反射膜層表面上，利用旋塗法塗覆UV可固化 树月曰之;谷液以形成uv可固化樹脂塗層，且隨後將具有0.6 160557.doc 201232532 mm厚度、120 mmcp外徑及15 mm(p内徑之第二透明基板（虛 設基板）置於塗層上。利用射出成形法自聚碳酸酯樹脂製 備第二透明基板。隨後，使用UV光固化塗層。由此製得 厚度為1.2 mm之DVD-R型光學資訊儲存媒體。 另外’利用網版印刷法將白色塗料組合物（由DIC公司製 造，產品名稱為UVSP20404WH)塗覆至第二透明基板表面 自第二透明基板中央11 mm至5 9 mm之徑向範圍中以形成 另一塗層。隨後使用uv光固化塗層以形成厚度為1〇 之 白色油墨印刷下層。白色油墨印刷下層充當吸墨層。 隨後，在由此製得之白色油墨印刷下層表面上，利用網 版印刷法塗覆如上所述之塗料液體Α來形成塗層。將塗層 在60°C之溫度下乾燥，得到厚度為15 μιη之第一多孔膜。 第一多孔膜充當吸墨層。 另外，利用網版印刷法使用#200篩孔尺寸之筛將塗料液 體Α塗覆在第一多孔膜表面上自第二透明基板中央585 mm 至59 mm之徑向範圍中，形成塗層。在6〇〇c之溫度下乾燥 塗層’得到厚度為10 μιη之第二多孔膜，進而在第一多孔 膜上靠近第一多孔膜外周緣形成複數個各自具有1〇 #爪高 度的凸塊。由此製得實例1光學資訊儲存媒體。 實例2 實例2之光學資訊儲存媒體以實質上與實例1相同的方法 製備’除了使用#300篩孔尺寸之篩來代替#2〇〇筛孔尺寸之 筛。複數個在實例2之第一多孔膜上靠近其外周緣所形成 之凸塊尚度各自為5 μηι。 160557.doc -10- 201232532 實例3 實例3之光學資訊儲存媒體以實質上與實例丨相同的方法 製備除了使用#350篩孔尺寸之篩來代替#2〇〇篩孔尺寸之 韩。複數個在實例3之第一多孔膜上靠近其外周緣所形成 之凸塊而度各自為3 μιη。 比較例1 比較例1之光學資訊儲存媒體以實質上與實例丨相同的方 法製備，除了使用#380篩孔尺寸之篩來代替#2〇〇篩孔尺寸 之篩。複數個在比較例1之第一多孔膜上靠近其外周緣所 形成之凸塊高度各自為2 μηι 〇 比較例2 比較例2之光學資訊儲存媒體以實質上與實例1相同的方 法製備’除了使用#460篩孔尺寸之篩來代替#2〇〇篩孔尺寸 之篩。複數個在比較例2之第一多孔膜上靠近其外周緣所 形成之凸塊高度各自為1 μηι。 實例4 實例4之光學資訊儲存媒體以實質上與實例1相同的方法 製備，除了使用#100篩孔尺寸之篩來代替#200篩孔尺寸之 篩。複數個在實例4之第一多孔膜上靠近其外周緣所形成 之凸塊高度各自為20 μιη。 實例5 實例5之光學資訊儲存媒體以實質上與實例1相同的方法 製備，除了使用#70篩孔尺寸之篩來代替#200筛孔尺寸之 篩。複數個在實例5之第一多孔膜上靠近其外周緣所形成 160557.doc 201232532 之凸塊tf;度各自為30 μηι。 比較例3 比較例3之光學資訊儲存媒體以實質上與實众"相同的方 法製備，除了使用㈣篩孔尺寸之薛來代替議篩孔尺寸 之篩。複數個在比較例3之第一多孔膜上靠近其外周緣所 形成之凸塊高度各自為40 μιη。 實例6 實例6之光學資訊儲存媒體以實質上與實例〗相同的方法 製備，除了第二多孔膜在自第二透明基板中央58 5爪⑺至 58.6 mm(代替58.5 mm至59 mm)之徑向範圍中形成。複數 個在實例6之第一多孔膜上靠近其外周緣所形成之凸塊高 度各自為1 0 μηι。 實例7 實例7之光學資訊儲存媒體以實質上與實例2相同的方法 製備，除了第二多孔膜在自第二透明基板中央58 5〇 mm至 5 8 · 55 mm之徑向範圍中形成。複數個在實例7之第一多孔 膜上靠近其外周緣所形成之凸塊高度各自為5 μιη» 比較例4 比較例4之光學資訊儲存媒體以實質上與實例2相同的方 法製備，除了第二多孔膜在自第二透明基板中央585〇爪爪 至58.53 mm之徑向範圍中形成。複數個在比較例4之第一 多孔膜上靠近其外周緣所形成之凸塊高度各自為5 μπι。 實例8 貫例8之光學資訊儲存媒體以實質上與實例1相同的方法 160557.doc -12- 201232532 製備，除了第二多孔膜在自第二透明基板中央58 〇職至 59.0 mm之經向_中形成。複數個在實㈣之第一多孔膜 上靠近其外周緣所形成之凸塊高度各自為1〇帅。 、 比較例5 、比較例5之光學資訊儲存媒體以實質上與實叫目同的方 法製備’除了第二多孔膜在自第二透明基板中央^ $職 至59.0 mm之徑向範圍中形成。複數個在比較例$、之第一= 孔膜上靠近其外周緣所形叙凸塊高度各自$ ι〇 _。 實例9 實例9之光學資訊儲存媒體以實質上與實例丨相同的方法 製備’除了第二多孔膜在自第二透明基板中央57。醜至 57.5 mm之徑向範圍中形成。複數個在實例9之第—多孔膜 上靠近其外周緣所形成之凸塊高度各自為1〇μιη。 比較例6 比較例6之光學資訊儲存媒體以實質上與實例丨相同的方 法製備，除了第二多孔膜在自第二透明基板中央％ 5爪⑺ 至57.0 mm之徑向範圍中形成。複數個在比較例6之第一多 孔膜上靠近其外周緣所形成之凸塊高度各自為1〇 pm。 實例10 實例10之光學資訊儲存媒體以實質上與實例丨相同的方 法製備，除了省去第二多孔膜且複數個凸塊在與白色油墨 印刷下層接觸之第二透明基板（虛設基板）表面中之一者上 自其外周緣向内1.5 mm至2.5 mm範圍内形成。實例1〇之複 數個凸塊高度各自為2〇 μιη 〇 I60557.doc 13 201232532 比較例7 比較例7之光學資訊儲存媒體以實質上與實例1相同的方 法製備，除了省去第二多孔膜。 比較例8 比較例8之光學資訊儲存媒體以實質上與比較例7相同的 方法製備，除了省去第二多孔膜且用砂紙（#1〇〇，由 Sumitomo 3M Co.，Ltd.製造）使第一多孔膜表面粗糙。 比較例9 比較例9之光學資訊儲存媒體以實質上與比較例7相同的 方法製備，除了塗料液體A含有複數個珠粒（產品名稱為The so-called printable discs are of the type of commonly used optical information storage media (e.g., CD and DVD-R) having face-to-face printed faces for recording electronic materials such as electronic music and video material. The ep (four) side has an ink absorbing layer capable of absorbing ink. The printing surface can be printed using, for example, an ink jet printer. With the latest developments in printing technology, high quality images similar to toothed silver photography can be printed on the printed surface of a printable disc. In particular, achieving this high quality similar to toothed silver photography requires the surface of the ink absorbing layer to be glossy. The gloss of the surface of the ink absorbing layer can be improved by reducing the surface roughness (4) of the ink receiving layer. Japanese Patent Application Laid-Open No. 2-21-2371, No. 2 GG3-123323, and No. 2 GG8-251123 each disclose the conventional printable optical disc, wherein the printing surface is reduced by reducing the surface roughness (Ra) of the ink receiving layer. Achieve gloss improvement. However, the ink receptive layer having a reduced surface roughness (Ra) is in planar contact with the component of the information recording/reproducing device during the recording and reproducing operation in the information recording/reproduction 160557.doc 201232532 device, and is not in point contact. This planar contact causes the ink absorbing layer of the printable optical disc to adhere to the holding mechanism of the information recording-reproducing device. Further, during insertion of the printable optical disc into the information recording/reproducing apparatus or ejection from the information recording-reproducing apparatus, the increased contact area between the components of the information recording-reproducing apparatus and the ink receiving layer increases the contact resistance therebetween. Thus, the printable disc is likely to stick during the insertion/ejection operation. In order to solve the above problems, Japanese Patent Application Laid-Open No. Hei. No. 2-48389 ("the '389 publication") proposes an optical information storage medium having a printing surface having an ink absorbing layer, the plurality of average particle diameters being larger than the thickness of the ink absorbing layer The acrylic beads which are less than twice the thickness of the ink receiving layer are uniformly distributed on the ink receiving layer. The proposed storage medium is designed to improve the gloss of the printed surface and to reduce the contact resistance between the components of the information recording/reproducing device and the printing surface of the storage medium during its insertion/ejection operation. SUMMARY OF THE INVENTION However, the optical information storage medium of the '389 publication undesirably has a visible surface roughness and poor print quality, which is composed of a plurality of acrylics having an average of 5 to 60 μηη and uniform distribution in the printing surface. In addition, the acrylic beads do not absorb the ink, causing a lower absorption of the storage medium. In view of the above, the present invention provides an optical information storage medium comprising a printable printing surface having a higher gloss and a higher ink absorbing ability while being inserted into an information recording_reproducing device with a lower contact resistance and/or The information recording-reproducing device pops up. 160557.doc 201232532 The inventors of the present invention have discovered that the optical information storage medium can be provided by forming on or above the ink receptive layer in an area 3 mm or less radially inward from the outer periphery of the ink receptive layer. A plurality of bumps each having a height of 3 μπι to 3 0 μηι and a width of 〇.〇5 mm to 1 mm. Various embodiments described herein relate to an optical information storage medium including a recording layer for recording material; a recording surface on which recording/reproducing light is incident on or above a printing surface disposed on a side opposite to the recording surface a plurality of bumps formed on or above the ink-receiving layer in an area 3 mm or less radially inward from the outer periphery of the ink-receiving layer, each of the plurality of bumps having 3 ^ to the height of μπι and the width 0 of 0_05 mm to i mm. In one aspect, 'if the heights of the plurality of bumps are each lower than 3, the information recording-reproducing device and the optical information storage medium during the insertion/ejection operation The contact resistance between the two cannot be reduced enough to prevent the optical information storage medium from sticking to the components of the information recording and reproducing apparatus. Further, if the south of the plurality of bumps is higher than 30 (four), the bump can be visually perceived during normal operation. To cause a poor appearance of the optical information storage medium. In another aspect, the plurality of (4) can be formed to have a width of 〇〇5 _ to i coffee. If the width of the plurality of bumps is lower than 〇.〇5 _, Then, during the insertion/ejection of the information recording/reproducing device and the optical information: the contact resistance cannot be reduced to a component sufficient to prevent the optical information storage medium =: :: recording/reproducing device. Further, if the width of the plurality of bumps is Light II_'the bumps can be visually perceived during normal operation, and the poor appearance of the media is stored. 160557.doc 201232532 In another aspect t, a plurality of bumps can each be radially from the outer periphery of the printed surface. Formed in an area of 3 mm or less inward. If the bump is formed in an area radially inward from the outer periphery of the printing surface by more than 3 mm, the bump can be perceived by visual inspection to cause a poor appearance of the optical information storage medium. In one aspect, the plurality of bumps may be made of a porous film formed on the surface of the ink receptive layer. In one aspect, 'having a height of 3 μη to 30 μπι and 〇·〇5 to ! mm A plurality of bumps of a width may each be formed on the printing surface from a region within 3 mm from the outer periphery of the ink receiving layer which should be formed on the printing surface. Therefore, a plurality of bumps may be formed on the ink receiving layer. Aspect The optical information storage medium further includes a transparent first substrate capable of transmitting/reproducing light, a reflective film layer disposed on the opposite side of the recording layer from the first substrate, a second substrate formed on the reflective germanium layer, and a second substrate formed on the reflective layer The ink-receiving layer in the lower layer of the white ink printing on the two substrates is formed on the lower layer of the white ink printing. In one aspect, the recording layer is made of an organic dye. [Embodiment] In the y description, similar components have been designated the same or similar The reference numerals are not related to whether they are shown in different embodiments. In order to illustrate the embodiments of the present invention in a clear and concise manner, the drawings are not necessarily proportional and some of the features may be somewhat indicated. The shape u A shows. The features described and/or illustrated for a given embodiment can be used in the same way or in a similar manner for a plurality of other embodiments and/or The features of the examples are used in combination or in place of the features of the embodiments. VIII 160 557.doc 201232532 Figure 1 shows a schematic cross-sectional view of an optical information storage medium in accordance with an embodiment. As shown, the optical information storage medium according to one embodiment includes a circular first transparent substrate 10, a recording (4) composed of a dye film, a reflective film layer U, and a circular second transparent substrate (dummy substrate) 13. media! The electronic data is recorded on the recording layer 11 by laser beams that are lightly incident on the recording surface 14 of the first transparent substrate ι from the direction indicated by the arrow A. The optical information storage medium according to the embodiment may be of the so-called printable disc type 'where the surface opposite the recording surface 14: the surface of the transparent substrate 13 may be configured to use various methods (such as an ink jet printer) Printed printing surface 15. Further, the label can be adhered to the printing surface. The printing surface 15 has a white ink printed lower layer 16 on its surface. As shown in Fig. 1, a first porous film 7 is formed on the surface of the white ink-printed lower layer 16 so as to cover the entire surface thereof. The first porous film 17 constitutes an ink absorbing layer. Further, the second porous film 18 may be formed on the surface of the first porous film 17 near the outer periphery of the white ink-printing lower layer 16. The second porous film 18 forms a plurality of bumps which are close to the outer periphery of the second transparent substrate 13. The plurality of bumps may each be formed with a height of 3 μΐη to 30 μπι and formed in a region 3 mm radially inward from the outer periphery of the first porous film opening such that the widths of the plurality of bumps are each 〇〇5 mm to 1 Mm. Figure! The reference numeral 19 in the middle indicates the central hole. The inventors of the present invention have found that if a plurality of bumps are formed on the first porous film 7 in a region radially inward of 3 mm or less from the outer periphery of the diaper film 17, the heights of the plurality of bumps are each 3 0 〇 1 to 30 μηι and widths each 〇〇 5 mm to 1 mm 'the first porous film 17 can exhibit higher gloss and higher ink absorbing ability and the optical information storage medium 1 can be inserted with lower contact resistance Information Record - 160557.doc 201232532 Pop-up in the playback device or from the information recording-reproducing device. EXAMPLES Various examples will now be described below in connection with comparative examples. Example 1 0.2 part by weight of lactic acid and io parts by weight of an aqueous solution of 2% by weight of oxalic acid were added to 80.0 parts by weight of a 6 wt% aqueous solution of polyvinyl alcohol (average degree of polymerization was 3,000; average degree of enthalpy was 88 moles %). To the mixed solution, 17.8 parts by weight of a fumed cerium oxide powder (available from Nippon Aerosil under the product name AER0SIL) was added while vigorously mixing the solution. After the solution was allowed to stand in a ball mill for one day to sufficiently disperse the powder of cerium oxide, 1.0 part by weight of an aqueous solution containing 〇·25 parts by weight of oxychloride octahydrate was further added to the solution. The resulting mixed solution was allowed to stand in a ball mill for one day. The coating liquid helium was thus obtained. The molded polycarbonate resin is injection molded to form a first transparent substrate having a thickness of 〇6 mm, an outer diameter of 12 mm, and a diameter of 15 mm (p inner diameter. The first transparent substrate may have a surface formed on its surface from its center 46 mn^ Tracking guide groove in the radial range of U7 _. The rail groove can be formed with a half width of 0.32 μηη, a depth of 〇15 μηΐ2 and a distance between 〇74. Subsequently, the cyanine dye solution is spin coated on the guide. The surface of the substrate of the groove is formed to form a coating dry coating to form a 5 recording layer having an average thickness of 7 〇 nm made of a dye film. On the surface of the recording layer, silver is sputtered to form a reflective film having a thickness of 100 nm. Subsequently, on the surface of the reflective film layer, the UV curable tree is coated by spin coating; the valley liquid is formed to form a uv curable resin coating, and then will have a thickness of 0.6 160557.doc 201232532 mm, 120 mmcp An outer diameter and a second transparent substrate (pummy substrate) of 15 mm (p inner diameter) were placed on the coating. A second transparent substrate was prepared from the polycarbonate resin by injection molding. Subsequently, the coating was cured using UV light. Produced DVD-R optical information with a thickness of 1.2 mm Storage medium. In addition, a white coating composition (manufactured by DIC Corporation, product name: UVSP20404WH) was applied to the surface of the second transparent substrate by a screen printing method from a radial range of 11 mm to 59 mm from the center of the second transparent substrate. Forming another coating. The uv light-cured coating is then used to form a white ink-printed lower layer having a thickness of 1 Å. The white ink-printed lower layer serves as an ink-receiving layer. Subsequently, the white ink thus printed is printed on the lower surface. The coating liquid enamel as described above is coated by a screen printing method to form a coating layer. The coating layer is dried at a temperature of 60 ° C to obtain a first porous film having a thickness of 15 μm. Ink-receiving layer. Further, the coating liquid Α is coated on the surface of the first porous film by a screen printing method using a #200 mesh size sieve in a radial range of 585 mm to 59 mm from the center of the second transparent substrate, Forming a coating. Drying the coating at a temperature of 6 ° C to obtain a second porous film having a thickness of 10 μm, and further forming a plurality of each on the first porous film near the outer periphery of the first porous film 〇#The height of the claw height The optical information storage medium of Example 1 was thus prepared. Example 2 The optical information storage medium of Example 2 was prepared in substantially the same manner as in Example 1 except that the #300 mesh size sieve was used instead of the #2 sieve size. The plurality of bumps formed on the first porous film of Example 2 near the outer periphery thereof are each 5 μηι. 160557.doc -10- 201232532 Example 3 The optical information storage medium of Example 3 is substantially In the same manner as in Example 制备, a sieve of #350 mesh size was used instead of the #2 〇〇 mesh size. A plurality of bumps formed on the first porous film of Example 3 near the outer periphery thereof were each 3 μm. Comparative Example 1 The optical information storage medium of Comparative Example 1 was prepared in substantially the same manner as Example , except that a #380 mesh size sieve was used instead of the #2 sieve size sieve. A plurality of bump heights formed on the first porous film of Comparative Example 1 near the outer periphery thereof were each 2 μηι 〇 Comparative Example 2 The optical information storage medium of Comparative Example 2 was prepared in substantially the same manner as in Example 1 Instead of using a #460 mesh size sieve instead of a #2 sieve size sieve. A plurality of bumps formed on the first porous film of Comparative Example 2 near the outer periphery thereof were each 1 μηι. Example 4 The optical information storage medium of Example 4 was prepared in substantially the same manner as in Example 1, except that a #100 mesh size sieve was used instead of the #200 mesh size sieve. A plurality of bump heights formed on the first porous film of Example 4 near the outer periphery thereof were each 20 μm. Example 5 The optical information storage medium of Example 5 was prepared in substantially the same manner as in Example 1, except that a #70 mesh size sieve was used instead of the #200 mesh size sieve. A plurality of bumps tf formed on the first porous film of Example 5 near the outer periphery thereof to form 160557.doc 201232532; degrees are each 30 μηι. Comparative Example 3 The optical information storage medium of Comparative Example 3 was prepared in substantially the same manner as the actual one, except that (4) the size of the mesh size was used instead of the sieve size sieve. A plurality of bump heights formed on the first porous film of Comparative Example 3 near the outer periphery thereof were each 40 μm. Example 6 The optical information storage medium of Example 6 was prepared in substantially the same manner as the Example except that the second porous film was in the shape of 5 claws (7) to 58.6 mm (instead of 58.5 mm to 59 mm) from the center of the second transparent substrate. Formed into the range. A plurality of bump heights formed on the first porous film of Example 6 near the outer periphery thereof were each 10 μm. Example 7 The optical information storage medium of Example 7 was prepared in substantially the same manner as in Example 2, except that the second porous film was formed in a radial range of 58 5 mm to 5 8 · 55 mm from the center of the second transparent substrate. A plurality of bumps formed on the first porous film of Example 7 near the outer periphery thereof were each 5 μηη» Comparative Example 4 The optical information storage medium of Comparative Example 4 was prepared in substantially the same manner as in Example 2 except The second porous film is formed in a radial range from the center 585 of the second transparent substrate to the claw of 58.53 mm. A plurality of bumps formed on the first porous film of Comparative Example 4 near the outer periphery thereof were each 5 μm. Example 8 The optical information storage medium of Example 8 was prepared in substantially the same manner as in Example 1 160557.doc -12-201232532, except that the second porous film was in the warp direction from the center of the second transparent substrate 58 to 59.0 mm. Formed in _. The heights of the bumps formed on the first porous film of the real (4) near the outer periphery thereof are each one. The optical information storage medium of Comparative Example 5 and Comparative Example 5 was prepared in a substantially the same manner as the actual method. The second porous film was formed in the radial range from the center of the second transparent substrate to 59.0 mm. . The plurality of bumps in the comparative example $, the first = hole film near the outer circumference of the bump height are each $ ι 〇 _. Example 9 The optical information storage medium of Example 9 was prepared in substantially the same manner as Example ’ except that the second porous film was in the center 57 from the second transparent substrate. Ugly formed in the radial range of 57.5 mm. A plurality of bump heights formed on the first porous film of Example 9 near the outer periphery thereof were each 1 μm. Comparative Example 6 The optical information storage medium of Comparative Example 6 was prepared in substantially the same manner as in Example , except that the second porous film was formed in the radial range from the center of the second transparent substrate of the claws (7) to 57.0 mm. A plurality of bump heights formed on the first porous film of Comparative Example 6 near the outer periphery thereof were each 1 pm. Example 10 The optical information storage medium of Example 10 was prepared in substantially the same manner as Example , except that the second porous film was omitted and a plurality of bumps were on the surface of the second transparent substrate (dummy substrate) in contact with the white ink printed lower layer. One of them is formed from the outer circumference of the outer circumference of 1.5 mm to 2.5 mm. The height of the plurality of bumps of Example 1 is 2 〇μιη 〇I60557.doc 13 201232532 Comparative Example 7 The optical information storage medium of Comparative Example 7 was prepared in substantially the same manner as in Example 1, except that the second porous film was omitted. . Comparative Example 8 An optical information storage medium of Comparative Example 8 was prepared in substantially the same manner as in Comparative Example 7, except that the second porous film was omitted and sandpaper (#1〇〇, manufactured by Sumitomo 3M Co., Ltd.) was used. The surface of the first porous film is roughened. Comparative Example 9 The optical information storage medium of Comparative Example 9 was prepared in substantially the same manner as in Comparative Example 7, except that the coating liquid A contained a plurality of beads (the product name was
Technopolymer ARX-30，由 Sekisui Plastics Co, Ltd.製 造）。 在以上實例中’實例1至實例1 〇說明根據本發明之光學 資訊儲存媒體，同時比較例1至比較例9之儲存媒體超出本 發明範之外。 針對所有實例，各吸墨層（第一多孔膜）之光澤度使用光 澤計（由 Nippon Denshoku Industries Co.，Ltd.製造，產品名 稱為「手提光澤計（Handy Gloss Meter)PG-lM」）以60。之 角度量測，各吸墨層之表面粗糙度使用表面粗糙度（由Technopolymer ARX-30, manufactured by Sekisui Plastics Co, Ltd.). In the above examples, 'Example 1 to Example 1' illustrate the optical information storage medium according to the present invention, while the storage mediums of Comparative Examples 1 to 9 are outside the scope of the present invention. For all the examples, the gloss of each ink receptive layer (first porous film) was measured by a gloss meter (manufactured by Nippon Denshoku Industries Co., Ltd., and the product name was "Handy Gloss Meter PG-lM"). Take 60. Angle measurement, the surface roughness of each ink absorbing layer uses surface roughness (by
Kosaka Laboratories Ltd.製造，產品名稱為ET4000AKR)量 測’且各吸墨層之動摩擦係數使用動摩擦計（由shint〇Manufactured by Kosaka Laboratories Ltd. under the product name ET4000AKR) and the dynamic friction coefficient of each ink absorbing layer is measured by a dynamic friction meter (by shint〇)
Scientific Co. Ltd.製造，產品名稱為Tribogear HHS2000) 罝測。此外’使用喷墨印刷機（由Seiko Epson Corp.製造， 產品名稱為PM-G800)以水性顏色油墨將影像印刷於各吸 160557.doc •14- 201232532 墨層上，且視覺上評估各印刷影像之亮度及清晰度。 此外’將實例1至實例ίο及比較例1至比較例9各自插入 與DVD播放器整合之電視（由byd:sign公司製造產品名稱 為「d:1566GJ精密LCD電視及_播放器」）中且自該與 DVD播放ϋ整合之電視中彈出若干次以測定各實例是否可 在不黏住DVD播放器之任何組件的情況下插人及^ (「插入’彈出實驗」）。若實例在不黏住與DVD播放器整合 :電視的情況下插入及彈出’則插入/彈出實驗之結果確 定為「平滑」。若在插入/彈出操作期間實例黏住與DVD播 放器整合之電視’則插入/彈出實驗之結果確定為「偶爾 黏住」或帛繁黏住」，取決於出現黏住的頻率。 此外，針對實例1至實例丨〇及比較例丨至比較例9之外 觀’目視檢查各自之外觀。若在吸墨層表面上未視覺上觀 察到粗糙度，則將外觀確定為「良好」。另一方面，若在 吸墨層表面上觀察到部分粗糙度，則將外觀確定為「較 差J。 以上對實例1至實例1〇中之每一者所進行之量測及測試 之^果闡述在以下表1中，且以上對比較例！至比較例9中 之每一者所進行之量測及測試的結果闡述在以下表2中。 160557.doc 15 201232532Manufactured by Scientific Co. Ltd., the product name is Tribogear HHS2000). In addition, an inkjet printer (manufactured by Seiko Epson Corp., product name: PM-G800) was used to print images on the ink layers of the 160557.doc •14-201232532 ink layer and visually evaluate each printed image. Brightness and clarity. Further, 'Example 1 to Example ίο and Comparative Example 1 to Comparative Example 9 are each inserted into a TV integrated with a DVD player (manufactured by Byd:Sign, the product name is "d: 1566GJ Precision LCD TV and _ Player") and It is popped up several times from the TV integrated with the DVD player to determine whether each instance can be inserted and ^ without any component of the DVD player ("Insert 'Eject Experiment"). If the instance does not stick to the DVD player: insert and pop-up in the case of a TV, the result of the insert/pop-up experiment is determined to be "smooth". If the instance sticks to the TV integrated with the DVD player during the insertion/ejection operation, the result of the insertion/ejection experiment is determined to be "occasionally stuck" or sticky, depending on the frequency of sticking. Further, the respective appearances were visually inspected for Example 1 to Example 丨〇 and Comparative Example 丨 to Comparative Example 9. If the roughness is not visually observed on the surface of the ink absorbing layer, the appearance is determined to be "good". On the other hand, if a partial roughness is observed on the surface of the ink receptive layer, the appearance is determined as "poor J. The above description of the measurement and test performed on each of the examples 1 to 1" The results of the measurements and tests performed in each of the above Comparative Examples! to Comparative Example 9 are set forth in Table 2 below. 160557.doc 15 201232532
160557.doc -16- 201232532 實例1至實例3及比較例1至比較例2的結果顯示雖然一個 具備複數個尚度為3 μιη、5 μιη或10 μηι靠近充當吸墨層 之第一多孔膜外周緣所形成之凸塊的光學資訊儲存媒體可 在不黏住資訊記錄-再現裝置的情況下插入其中或自其中 彈出，但另一具備複數個高度為1 μπι或2 μπι之凸塊的光學 資訊儲存媒體可在插入/彈出搡作期間黏住一部分資訊記 錄-再現裝置，因為該等較低高度凸塊引起吸墨層與資訊 記錄-再現裝置組件之間的接觸面積增加。因此，確定複 數個凸塊之高度各應為3 μιη或更高以便使光學資訊儲存媒 體平滑地插入資訊記錄-再現裝置或自資訊記錄_再現裝置 中彈出。 實例4至實例5及比較例3之結果顯示雖然一個具備複數 個高度為30 μπι或更低之凸塊的光學資訊儲存媒體可在不 黏住資訊記錄-再現裝置的情況下插入其中或自其中彈 出’且目視檢查無表面粗糙度，具有良好外觀，但另一具 備複數個高度為40 μπι之凸塊的光學資訊儲存媒體可由目 視檢查觀察到在吸墨層表面上具有粗糙度。由於表面粗縫 度’具備高度為40 μιη之凸塊的儲存媒體可被察覺具有較 差外觀’儘管媒體亦可平滑地插入資訊記錄-再現裝置中 且自資訊記錄-再現裝置中彈出。因此，確定複數個凸塊 之高度應各為30 μιη或更低以便達成良好外觀。 實例6至實例7及比較例4的結果顯示雖然一個具備複數 個寬度為0.05 mm或0.1 mm之凸塊的光學資訊儲存媒體可 在不黏住資訊記錄-再現裝置的情況下插入其中或自其中 160557.doc 17 201232532 彈出，但另一具備複數個寬度為0.03 mm之凸塊的光學資 訊儲存媒體可在插入/彈出操作期間黏住一部分資訊記錄_ 再現裝置，因為該等較窄寬度凸塊引起吸墨層與資訊記 錄-再現裝置組件之間的接觸面積增加。因此，確定複數 個凸塊之寬度應各在〇.〇5 mm與0.1 mm之間以便使光學資 訊儲存媒體平滑地插入資訊記錄-再現裝置或自資訊記錄_ 再現裝置中彈出。 貫例8及比較例5之結果顯示雖然一個具備複數個寬度為 1.0 mm之凸塊的光學資訊儲存媒體可目視檢查無表面粗糙 度’產生良好外觀’但另一具備複數個寬度為丨5 mm之凸 塊的光學資訊儲存媒體可由目視檢查觀察到在吸墨層表面 上具有粗糙度’產生較差外觀。因此，確定複數個凸塊之 寬度應各為1.0 mm或更窄以避免較差外觀。 實例9及比較例6的結果顯示雖然若複數個凸塊形成於距 第一多孔膜外周緣徑向向内2.5 mm至3.0 mm之間的區域， 則一個光學資訊儲存媒體可在不黏住資訊記錄-再現裝置 的情況下插入其中或自其中彈出，但另一具備複數個形成 於距第一多孔膜外周緣3.0 mm至3.5 mm之間的區域之凸塊 的光學資訊儲存媒體可由目視檢查觀察到在吸墨層表面上 具有粗糙度，產生較差外觀。因此，確定複數個凸塊應各 形成於距第一多孔膜外周緣徑向向内3 〇 mm或更小的區域 中以避免較差外觀。 實例ίο之結果顯示若複數個各具有2〇 μιη高度之凸塊在 與白色油墨印刷下層接觸之第二透明基板（虛設基板）表面 160557.doc •18· 201232532 上形成於距其外周緣徑向向内h5 _與2.5 mm之間的區域 1中（即使不形成任何第二多孔膑）’則光學資訊儲存媒體可 以水性油墨在印刷表面上提供清晰印刷與較亮色彩，且可 在不黏住資訊記錄_再現裝置的情況下插入其中或自盆 彈出。 ” 自實例1至實例i 〇及比較例7之結果發現倘若儲存媒體 並不具有複數個靠近吸墨層（第一多孔膜）外周緣所形成的 $塊’則光學資訊儲存媒體可在插入/彈出操作期間更頻 %、也點住一部分資訊記錄-再現裝i。因此，比較例7確定 為不實用的。 自實例1至實例10及比較例8之結果發現，若光學資訊儲 存媒體並不具有複數個靠近吸墨層（第-多孔膜）外周緣所 形成之凸塊而是具有經使用砂紙變粗糙的吸墨層，則可觀 察到儲存媒體具有較差外觀且在使用喷墨印刷機以水性油 墨印刷時其上具有模糊印刷與較暗色彩。 自實例1至實例10及比較例9之結果發王見，若將某些珠粒 添加至塗料液體A中且使用包括珠粒之塗料液體八製造光 學資訊儲存媒體，則可觀察到儲存媒體在插入/彈出操作 期間更頻繁地黏住-部分資訊記錄_再現裝置，具有較差 外觀，且在使用喷墨印刷機以水性油墨印刷時其上具有模 糊印刷與較暗色彩。 、 本發明不應限於本申請案中所述之意欲作為各種態樣之 說明的特定實施例及實例。如同熟習此項技術者顯而易 知，在不背離本發明精神及範嘴的情況下可產生許多修改 160557.doc 201232532 及變化。舉例而言，儘管以上特定實施例及實例中複數個 凸塊藉由在第一多孔膜17上靠近其外周緣形成第二多孔膜 18來形成，然複數個凸塊可在第二透明基板13上靠近其外 周緣形成使得複數個凸塊可在第一多孔膜17表面上方靠近 其外周緣凸出。 【圖式簡單說明】 圖1顯示根據一個實施例之光學資訊儲存媒體之示意橫 截面圓β 【主要元件符號說明】 I 光學資訊儲存媒體 10 第一透明基板 II 記錄層 反射膜層 第二透明基板（虛設基板） 記錄表面 15 16 17 18 19 印刷表面 白色油墨印刷下層 第一多孔膜/吸墨層 第二多孔膜 中央孔洞 160557.doc -20·160557.doc -16- 201232532 The results of Examples 1 to 3 and Comparative Examples 1 to 2 show that although one has a plurality of first porous films having a degree of 3 μm, 5 μm or 10 μm close to function as an ink receiving layer The optical information storage medium of the bump formed by the outer periphery can be inserted into or ejected from the information recording-reproducing device without being stuck, but another optical having a plurality of bumps having a height of 1 μm or 2 μm The information storage medium can stick to a part of the information recording-reproducing device during the insertion/ejection operation because the lower height bumps cause an increase in the contact area between the ink receiving layer and the information recording-reproducing device assembly. Therefore, it is determined that the height of the plurality of bumps should each be 3 μηη or higher in order to smoothly insert the optical information storage medium into the information recording-reproducing device or eject from the information recording/reproducing device. The results of Examples 4 to 5 and Comparative Example 3 show that although an optical information storage medium having a plurality of bumps having a height of 30 μm or less can be inserted therein or without sticking to the information recording-reproducing device Ejected 'and visually inspected without surface roughness, having a good appearance, but another optical information storage medium having a plurality of bumps having a height of 40 μm can be visually inspected to have roughness on the surface of the ink receiving layer. A storage medium having a surface having a height of 40 μm can be perceived as having a poor appearance because the medium can be smoothly inserted into the information recording-reproducing apparatus and ejected from the information recording-reproducing apparatus. Therefore, it is determined that the height of the plurality of bumps should be 30 μm or less each in order to achieve a good appearance. The results of Examples 6 to 7 and Comparative Example 4 show that although an optical information storage medium having a plurality of bumps having a width of 0.05 mm or 0.1 mm can be inserted therein or without sticking to the information recording-reproducing device 160557.doc 17 201232532 pop-up, but another optical information storage medium with a plurality of bumps with a width of 0.03 mm can stick a part of the information recording_reproduction device during the insertion/eject operation because of the narrow width bumps The contact area between the ink receiving layer and the information recording-reproducing device assembly is increased. Therefore, it is determined that the width of the plurality of bumps should be between mm.〇5 mm and 0.1 mm so that the optical information storage medium can be smoothly inserted into the information recording-reproducing device or ejected from the information recording_reproducing device. The results of Example 8 and Comparative Example 5 show that although an optical information storage medium having a plurality of bumps having a width of 1.0 mm can be visually inspected for no surface roughness 'to produce a good appearance' but the other has a plurality of widths of 丨5 mm The optical information storage medium of the bumps can be visually inspected to have a roughness on the surface of the ink absorbing layer to produce a poor appearance. Therefore, it is determined that the width of the plurality of bumps should be 1.0 mm or less each to avoid a poor appearance. The results of Example 9 and Comparative Example 6 show that although a plurality of bumps are formed in a region between 2.5 mm and 3.0 mm radially inward from the outer periphery of the first porous film, an optical information storage medium can be stuck. An optical information storage medium into which the information recording-reproducing device is inserted or ejected therefrom, but another plurality of bumps formed in an area between 3.0 mm and 3.5 mm from the outer periphery of the first porous film can be visually observed. The inspection observed that there was roughness on the surface of the ink absorbing layer, resulting in a poor appearance. Therefore, it is determined that a plurality of bumps should each be formed in a region radially inward of 3 〇 mm or less from the outer periphery of the first porous film to avoid a poor appearance. The result of the example ίο shows that if a plurality of bumps each having a height of 2 μm are formed on the surface of the second transparent substrate (dummy substrate) in contact with the white ink printed lower layer, 160557.doc •18·201232532 is formed radially from the outer periphery thereof. In the region 1 between h5 _ and 2.5 mm (even if no second porous 不 is formed), the optical information storage medium can provide clear printing and brighter colors on the printing surface, and can be non-sticky. In the case of the information recording_reproduction device, it is inserted or ejected from the basin. From the results of Example 1 to Example i and Comparative Example 7, it was found that the optical information storage medium can be inserted if the storage medium does not have a plurality of "blocks" formed near the outer periphery of the ink receiving layer (first porous film). / During the pop-up operation, the frequency information is more frequently %, and a part of the information record-reproduction device i is also clicked. Therefore, Comparative Example 7 is determined to be impractical. From the results of Examples 1 to 10 and Comparative Example 8, it was found that if the optical information storage medium is Without a plurality of bumps formed near the outer periphery of the ink receptive layer (the first porous film) but having an ink receptive layer roughened by using a sandpaper, it is observed that the storage medium has a poor appearance and is in use with an ink jet printer. When printed with water-based ink, it has a hazy print and a darker color. The results from Examples 1 to 10 and Comparative Example 9 are known, if some beads are added to the coating liquid A and a coating comprising beads is used. Liquid Eight Manufacturing Optical Information Storage Media, it can be observed that the storage medium sticks more frequently during the insertion/ejection operation - part of the information recording_reproducing device, has a poor appearance, and uses inkjet printing The machine is printed with water-based ink with ambiguous printing and darker colors. The invention should not be limited to the specific embodiments and examples described in the application, which are intended to be illustrative of various aspects. It will be appreciated that a number of modifications can be made without departing from the spirit and scope of the present invention, and the variations can be made, for example, although in the above specific embodiments and examples, the plurality of bumps are in the first porous The film 17 is formed on the outer peripheral edge of the film 17 to form a second porous film 18, and a plurality of bumps may be formed on the second transparent substrate 13 near the outer periphery thereof such that a plurality of bumps may be above the surface of the first porous film 17. Figure 1 shows a schematic cross-sectional circle β of an optical information storage medium according to an embodiment. [Main element symbol description] I Optical information storage medium 10 First transparent substrate II Recording layer Reflective film layer Second transparent substrate (dummy substrate) Recording surface 15 16 17 18 19 Printing surface White ink Printing lower layer First porous film / Ink absorbing layer Second porous film Central hole 160557.doc -20·