201001014 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種表面具微圖案的導光板製造方 法’特別是關於一種藉由微圖案光罩及光硬化樹脂在表 面形成微圖案的導光板製造方法。 【先前技術】 背光模組(back-light module)可應用於各種消費性 電子產品中，以作為液晶顯示器（liquid crystal display) 之光源系統。近年來，背光模組依其產品技術領域之不 同，不斷向輕薄短小化發展，而且可分成數種不同供光 類型’例如··側光型背光模組或直下式背光模組等。背 光模組之工作原理為一電致發光之光源提供光線，光線 直接或間接進入一導光板内，再經由導光板本身具有反 射結構之底面或位於其下方之一反射板進行反射，使多 數光線向上射出導光板，另進入一擴散板(diffuser plate) 及一棱鏡板(prism plate)來調整光線角度，以提供均勻 光線供液晶顯示面板使用。 目前，導光板之製程主要分為兩種：印刷式（screen printing)與非印刷式，其中印刷式係在導光板之底面塗 附墨點以形成特定之反射圖案（dot pattern)，其使光線接 觸底面反射圖案後反射向上均勻射出導光板。另外，非 印刷式製程大多採用射出成型（injection molding)技術 在導光板之底面以直接一體成型設置複數凹凸圖案以 201001014 達到光線均勻化之效果，亦有先製造導光板再以切割或 熱壓方式處理底面 ，以形成凹凸圖案者。相較於印刷式 導光板之反射圖案可能吸收光線，此種由導光板一體成 型之凹凸圖案直接以其表面曲度反射光線，因此反射之 光線強度不會減弱，因此具有較佳光學性能之優點。 請參照中華民國公告第1256338號發明專利，其揭 不一種導光板之製造方法，其包含下列步驟：提供一模 具；提供熔融樹脂材料與惰性氣體；將熔融樹脂材料與 惰性氣體一併注入模具之模腔中；保壓冷卻該模具；脫 模，以形成導光板成品，其中該模具之至少一内表面設 置凹凸圖案，以在導光板之底面對應形成反射層凹凸圖 案。在此製造方法中，反射層凹凸圖案是直接一體成型 於導光板之底面。 請參照中華民國公告第1297639號發明專利，其揭 不另一種導光板製造方法，其包含下列步驟：提供材料 基板，提供模仁基板，該模仁基板具有複數凹槽圖案， 該凹槽圖案由複數側面及一底面組成；利用該模仁基板 對該材料基板進行熱壓；務除該模仁基板，形成導光 板其中在熱壓過程中，3亥模仁基板之底面與該材料基 板具有間隔，該材料基板通過該模仁基板之作用壓力^ 該材料基板之内身自聚力形成相應突起圖案。在此製造 方法中，突起圖案是因熱壓之壓迫力而凸出形成在導光 板之底面上。 請參照中華民國公告第M334344號新型專利，其揭 201001014 示另一種導光板之製造裝置，其中一金屬薄膜包覆在一 滾輪組之至少一滾輪的表面，並調整二滾輪之間隙與溫 度後，再置入塑膠材質薄膜與二滾輪之間，讓塑膠材質 薄膜能利用滚輪之熱能來軟化塑膠材質薄膜之表面，且 利用金屬薄膜上之微凸點順勢在塑膠材質薄膜表面上 滾壓出有微孔槽等對應圖案，該塑膠材質薄膜隨後則可 切割成導光板。在此製造裝置之處理下，微孔槽等對應 圖案是因熱滾壓之壓迫力而形成在導光板之表面上。 然而，隨著消費者對於消費性電子產品之液晶顯示 面板的品質要求日益提.高，背光模組生產廠商也必需因 應提供各種背光模組零組件的品質，例如導光板也需要 縮小導光板表面的微圖案之尺寸及間距，以提供更好的 光線均勻化效果。然而，由上述導光板製造方法或裝置 所製造的導光板受限於壓模之模具表面難以機械加工 形成更精細的壓模圖案，當微圖案之尺寸小於 300um(微米）以下及間距小於100至200um以下時，上 述導光板製造方法或裝置即無法適用。再者，每當設計 一種新規格之導光板微圖案分佈樣態，就必需對應加工 製造具對應壓模圖案之模具，由於模具加工成本極高， 而且模具或滾輪在使用期間必需抵壓接觸微圖案材料 而容易耗損，因此不利於降低後績導光板之製造成本。 故，有必要提供一種表面具微圖案的導光板製造方 法，以解決習知技術所存在的問題。 6 201001014 【發明内容】 本發明之主要目的在於提供一種表面具微圖案的導 光板製造方法，其係在基板表面上塗佈光硬化樹脂層， 並利用微圖案光罩進行光硬化樹脂之硬化，及去除未硬 化的區域，以便在基板表面上形成微圖案層，由於微圖 案光罩之透光區的解析度極高，因此能確保提高導光板 上微圖案之解析度。 本發明之次要目的在於提供一種表面具微圖案的導 光板製造方法，其中製程僅利用光硬化樹脂及微圖案光 罩，不需搭配使用光阻的圖案化程序，且微圖案光罩也 不需接觸微圖案材料，因此可延長微圖案光罩之使用壽 命，並且進一步簡化導光板製程及降低導光板之製造成 ° 根據本發明之表面具微圖案的導光板製造方法，本 發明主要利用光硬化樹脂的硬化原理以及類似於光阻 製程中所使用的光罩來達成在導光板表面形成微圖案 層之目的，其中光硬化樹脂的硬化原理在於利用電磁輻 射，如紫外綫(ultraviolet，UV)、電子束(electron beam， EB)或可見光照射塗層，以使塗層中的低分子量物質産 生輻射聚合、交聯及接枝等反應，迅速將低分子量物質 轉變成高分子量産物的化學過程，固化是直接在不加熱 的基材上進行，光硬化樹脂的體系中不含溶劑或僅含極 少量溶劑，受照射後的區域幾乎1〇〇%固化，而且揮發 性有機化合物（volatile organic compound，V0C)排放量 7 201001014 2 6因此，光硬化樹脂常用於做為黏著劑或形成表面 圖案的領域中。㈣，現今許多㈣光硬化樹脂做為表 面圖㈣技術多是搭配使用壓印或滾㈣方式來進 仃’其存在壓模成本不易降低及壓_ #精細度難以提 兩等技術問題。因此，本發明申請人於是對此f用光硬 化樹脂形絲面@㈣餘進行研究與改良，並參考類 、於光阻1€中所使用的光罩來達成在導光板表面形 成解析度更高、更精密的微圖㈣之目的。而且，相較 於傳統做法常因壓模磨損消耗而不斷_置壓模，本發 明的微圖案光罩因不需接觸導光板或光硬化樹脂的表 面^因此可延長微圖案光罩之使用壽命，省卻了時常更 換壓模等昂貴耗材的成本。再者，本發明的製程雖使用 微圖案光罩但卻不需搭配使用光阻圖案化程序，因此本 發明的導光板製造方法確實能進一步簡化導光板製程 及降低導光板製造成本。 '為達上述之目的，本發明提供一種表面具微圖案的 導光板製造方法，其包含步驟：提供一基板；在該基板 之一表面上塗佈一光硬化樹脂層；使一特定光線通過一 微圖案光罩之數個透光區照射該光硬化樹脂層；以及， 去除該光硬化樹脂層未受光線照射的區域，僅留下受光 線照射而硬化的區域成為數個微圖案，因而在該基板之 表面上形成一微圖案層。 在本發明之一實施例中，該基板之材質為聚對苯二 甲酉文乙二醇酉旨（polyethylene terephthalate，PET)或聚甲 201001014 基丙烯酸曱酉旨（poly(methyl methacrylate)，PMMA)。 在本發明之一實施例中，該微圖案層形成在該基板 之底表面。 在本發明之一實施例中，該微圖案層形成在該基板 之上表面° 在本發明之一實施例中，該基板之底表面及上表面 分別形成〜層該微圖案層。 在本發明之一實施例中，該光硬化樹脂層為紫外光 硬化树脂層’及該特定光料紫外光。 在本發明之—實施例中，該光硬化樹脂層為可見光 硬化 =’及該特定光線為可見光。 廊明之一實施例中，該光硬化樹脂層為電子束 3曰m ’及該特定光線為電子束。 在本發明201001014 VI. Description of the Invention: [Technical Field] The present invention relates to a method for fabricating a light guide plate having a micropattern on its surface, particularly relating to a light guide plate having a micropattern formed on a surface thereof by a micropattern mask and a photohardenable resin Production method. [Prior Art] A back-light module can be applied to various consumer electronic products as a light source system of a liquid crystal display. In recent years, backlight modules have been developed to be light and thin, depending on the technical field of their products, and can be divided into several different types of light supply, such as sidelight type backlight modules or direct type backlight modules. The working principle of the backlight module is to provide light to an electroluminescent light source, and the light enters directly or indirectly into a light guide plate, and then reflects through the bottom surface of the light guide plate having a reflective structure or a reflector under the light guide plate to make most light The light guide plate is ejected upward, and a diffuser plate and a prism plate are further inserted to adjust the light angle to provide uniform light for the liquid crystal display panel. At present, the process of the light guide plate is mainly divided into two types: screen printing and non-printing, wherein the printing type applies ink dots on the bottom surface of the light guide plate to form a specific dot pattern, which makes the light After the bottom surface reflection pattern is contacted, the reflection is uniformly emitted upwardly to the light guide plate. In addition, most of the non-printing processes use the injection molding technology to directly form a plurality of concave and convex patterns on the bottom surface of the light guide plate to achieve the effect of uniformizing the light with 201001014. The light guide plate is first manufactured and then cut or hot pressed. The bottom surface is treated to form a concave-convex pattern. Compared with the reflective pattern of the printed light guide plate, the light pattern may absorb light. The concave-convex pattern integrally formed by the light guide plate directly reflects the light with the curvature of the surface, so that the intensity of the reflected light is not weakened, and thus has the advantages of better optical performance. . Please refer to the invention patent of No. 1256338 of the Republic of China, which discloses a method for manufacturing a light guide plate, which comprises the steps of: providing a mold; providing a molten resin material and an inert gas; and injecting the molten resin material together with the inert gas into the mold. In the cavity, the mold is cooled and pressure-released to form a finished light guide plate, wherein at least one inner surface of the mold is provided with a concave-convex pattern to form a concave-convex pattern of the reflective layer on the bottom surface of the light guide plate. In this manufacturing method, the reflective layer concave-convex pattern is directly integrally formed on the bottom surface of the light guide plate. Please refer to the invention patent of No. 1297639 of the Republic of China, which discloses another method for manufacturing a light guide plate, comprising the steps of: providing a material substrate, providing a mold base substrate, the mold base substrate having a plurality of groove patterns, the groove pattern being Forming a plurality of sides and a bottom surface; using the mold base substrate to heat-press the material substrate; removing the mold base substrate to form a light guide plate, wherein during the hot pressing process, the bottom surface of the 3H-mode substrate is spaced from the material substrate The substrate of the material passes through the working pressure of the mold substrate, and the inner body of the material substrate forms a corresponding protrusion pattern. In this manufacturing method, the projection pattern is convexly formed on the bottom surface of the light guide plate by the pressing force of the hot pressing. Please refer to the new patent of the Republic of China Announcement No. M334344, which discloses another manufacturing apparatus of a light guide plate, in which a metal film is coated on the surface of at least one roller of a roller set, and the gap and temperature of the two rollers are adjusted, Re-inserted between the plastic film and the two rollers, the plastic film can use the heat of the roller to soften the surface of the plastic film, and use the micro-bump on the metal film to roll on the surface of the plastic film. Corresponding pattern such as a hole groove, the plastic material film can then be cut into a light guide plate. Under the treatment of the manufacturing apparatus, the corresponding pattern of the micro-holes and the like is formed on the surface of the light guide plate by the pressing force of the hot rolling. However, as consumers demand higher quality of liquid crystal display panels for consumer electronic products, backlight module manufacturers must also provide quality for various backlight module components. For example, the light guide plate also needs to reduce the surface of the light guide plate. The size and spacing of the micropatterns to provide better light homogenization. However, the light guide plate manufactured by the above-described light guide plate manufacturing method or apparatus is limited in that the mold surface of the stamper is difficult to be machined to form a finer stamper pattern, and when the size of the micropattern is less than 300 um (micrometer) and the pitch is less than 100 to When the thickness is 200 um or less, the above-described light guide plate manufacturing method or apparatus cannot be applied. Furthermore, whenever a new specification of the micro-pattern distribution pattern of the light guide plate is designed, it is necessary to process and manufacture the mold with the corresponding stamp pattern, because the mold processing cost is extremely high, and the mold or the roller must be pressed against the micro during use. The pattern material is easily depleted, and thus it is disadvantageous for reducing the manufacturing cost of the post-performance light guide plate. Therefore, it is necessary to provide a method of manufacturing a light guide plate having a micropattern on the surface to solve the problems of the prior art. 6 201001014 SUMMARY OF THE INVENTION A main object of the present invention is to provide a method for manufacturing a light guide plate having a micropattern on a surface thereof, which is coated with a photo-curable resin layer on a surface of the substrate, and hardened by a photo-curable resin using a micro-pattern mask. And removing the uncured regions to form a micro-pattern layer on the surface of the substrate. Since the resolution of the light-transmissive region of the micro-pattern mask is extremely high, it is ensured that the resolution of the micro-pattern on the light guide plate is improved. A secondary object of the present invention is to provide a method for manufacturing a light guide plate having a micropattern on a surface, wherein the process only uses a photo-curable resin and a micro-pattern mask, and the patterning process using the photoresist is not required, and the micro-pattern mask is not The micro-pattern material needs to be contacted, thereby prolonging the service life of the micro-pattern mask, and further simplifying the light guide plate process and reducing the manufacturing of the light guide plate. The method for manufacturing a light guide plate having a micro-pattern according to the present invention mainly utilizes light. The hardening principle of the hardening resin and the photomask used in the photoresist process are used for the purpose of forming a micropattern layer on the surface of the light guide plate, wherein the hardening principle of the photohardening resin is to utilize electromagnetic radiation such as ultraviolet (UV), Electron beam (EB) or visible light irradiation coating to cause low-molecular-weight substances in the coating to generate radiation polymerization, cross-linking and grafting reactions, and to rapidly convert low-molecular-weight substances into high-molecular-weight products. It is carried out directly on a substrate that is not heated, and the system of the photocurable resin contains no solvent or contains very little The amount of solvent, almost 1% curing after irradiation, and volatile organic compound (VOC) emissions 7 201001014 2 6 Therefore, photohardening resin is often used as an adhesive or form a surface pattern. in. (4) Many of today's (4) photohardenable resins are used as surface diagrams. (4) The technology is often used in conjunction with embossing or rolling (four) methods. The presence of stamping costs is not easy to reduce and pressure _ #fineness is difficult to mention. Therefore, the applicant of the present invention has studied and improved the photohardenable resin-shaped silk surface @(四)余, and referred to the reticle used in the photoresist 1 to achieve a more resolution on the surface of the light guide plate. The purpose of high and more precise micrographs (4). Moreover, the micropattern mask of the present invention can extend the service life of the micropattern mask because it does not need to contact the surface of the light guide plate or the light hardening resin as compared with the conventional practice. This eliminates the cost of replacing expensive consumables such as stampers. Furthermore, although the process of the present invention uses a micropatterned mask but does not require the use of a photoresist patterning process, the method of manufacturing the light guide plate of the present invention can further simplify the process of the light guide plate and reduce the manufacturing cost of the light guide plate. For the purpose of the above, the present invention provides a method for manufacturing a light guide plate having a micropattern on the surface, comprising the steps of: providing a substrate; coating a surface of one of the substrates with a light-hardening resin layer; and passing a specific light through a plurality of light-transmitting regions of the micro-patterned reticle illuminating the photo-curable resin layer; and removing a region of the photo-curable resin layer that is not exposed to light, leaving only a region that is hardened by irradiation of light to become a plurality of micro-patterns, thereby A micropattern layer is formed on the surface of the substrate. In one embodiment of the present invention, the material of the substrate is polyethylene terephthalate (PET) or polymethyl methacrylate (PMMA). . In an embodiment of the invention, the micropattern layer is formed on a bottom surface of the substrate. In one embodiment of the invention, the micropattern layer is formed on the upper surface of the substrate. In one embodiment of the invention, the bottom surface and the upper surface of the substrate are respectively formed with a layer of the micropattern layer. In an embodiment of the invention, the photohardenable resin layer is an ultraviolet light curing resin layer' and the specific light source ultraviolet light. In an embodiment of the invention, the photohardenable resin layer is visible light hardened = ' and the specific light is visible light. In one embodiment of the porch, the photo-curable resin layer is an electron beam 3 曰 m ' and the specific ray is an electron beam. In the present invention
30〇um(微米)。之一貫施例中’該微圖案之尺寸小於 在本發明之 « 0ΛΠ f 實施例中，該微圖案之間距小於1〇〇 至 200um(微米）〇 ΐυυ 在本發明之 樹脂混摻有光撫實施例中，該光硬化樹脂層的光硬化 頌散顇粒。 在本發明之〜 樹脂混摻有光及/施例中，該光硬化樹脂層的光硬化 夂射顇粒。 在本發明之〜 且在形成該㈤种’錄板係—長條狀板體’ 元。 茶層後’切割該基板成為數個導光板單 9 201001014 【實施方式】 為了讓本發明之上述及其他目的、特徵、優點能更 明顯易懂’下文將特舉本發明較佳實施例’並配合所附 圖式，作詳細說明如下。 清參照第1A、IB、1C及1D圖所示，本發明第一 實施例之表面具微圖案的導光板製造方法較佳應用於 製做液=顯示器等平面顯示器或其他照明、廣告看板所 使用的i光模組之導光板，本發明之導光板製造方法主 要包含下列步驟：提供一基板1〇 ;在該基板1〇之一表 面101上塗佈一光硬化樹脂層11 ;使一特定光線通過 一微圖案光罩2〇之數値透光區21照射該光硬化樹脂層 11 ;以及’去除該光硬化樹脂層U未受光線照射的區 域’僅留下受光線照射而硬化的區域成為數個微圖案 111，因而在該基板1〇之表面1〇1上形成一微圖案層 11，。 請參照第1A圖所示，本發明第一實施例之表面具 微圖案的導光板製造方法第一步驟係：提供一基板1〇。 在本步驟中’該基板10係一透明塑性材質製成之板 體，其俯視形狀通常概呈矩形，及其剖視形狀通常概呈 矩形或楔形，但並不限於此。該基板10之透明塑性材 質可選自聚對本一曱酉夂乙一醇酉旨（p〇iyethylene terephthalate，PET)或聚曱基丙烯酸甲酯（p〇ly(rnethyl methacrylate)，PMMA)。該基板1〇之厚度或尺寸則依 10 201001014 產品之需求而變化，同時該基板10之週邊亦可能選擇 性具有結合用凸緣，以便與其他零組件相結合，例如背 光模組之外框（未繪示）等° 請參照第1A及1B圖所示’本發明第一實施例之表 面具微圖案的導光板製造方法第二步驟係：在該基板 10之一表面101上塗佈^光硬化樹脂層11。在本步驟 中’該基板10具有一第〆表面1〇1及一第二表面102。 在一實施例中，該第一表面丨〇1為該基板10之底表面 (即靠近反射板之反射表面），而該第二表面102為該基 板10之上表面（即靠近擴散板或稜鏡板之出光表面）； 但在另一實施例中，該第一表面101亦可做為上表面（出 光表面）’而該第二表面102可做為底表面（反射表面）。 在本實施例中，該第一表面101並不限制為底表面或上 表面，同時該光硬化樹脂層11可利用旋塗或刮刀等方 式塗佈形成於該第一表面ιοί上。該光硬化樹脂層η 之厚度係可依產品需求加以改變。在本發明中，該光硬 化樹脂層11係選自透明感光樹脂材質，而下一步驟所 使用之光線係依該光硬化樹脂層u之材質加以對應改 變。例如，在本實施例中，該光硬化樹脂層u較佳選 自紫外光(UV)硬化樹脂層，及該光線選自紫外光。在其 ，實施例中，該光硬化樹脂層n亦可選自可見光硬化 掛月曰層，及该光線為可見光；或者，該光硬化樹脂層 11選自電子束硬化樹脂層，及該光線為電子束。在開 始塗佈該光硬化樹脂層11之後及形成該微圖案層12之 11 201001014 前，該基板10皆於不存在光線的_境中（較佳係 一無光的真空環境），以避免該光硬化樹脂層11發生不 可預期的硬化。 請參照第1C圖所示’本發明第一實施例之表面具 微圖案的導光板製造方法第二步驟係.使一特定光線通 過一微圖案光罩20之數個透光區21照射該光硬化樹脂 層11。在本步驟中，本發明係以該光硬化樹脂層11為 紫外光硬化樹脂層及該光線為紫外光為例進行說明。紫 外光硬化樹脂層具有類似負型光阻（negative photo-resist)的性質，例如在照射適當光線後，二者受 光線照射的區域皆能硬化，而未受光線照射的區域則可 利用適當有機溶劑或電漿(plasma)加以去除。然而，紫 外光硬化樹脂層亦具有不同於負型光阻的性質，例如紫 外光硬化樹脂層之材質（如環氧丙烯酸酯及/或聚氨酯丙 烯酸酯等的交鏈聚合物）通常是透明並可使光線幾乎完 全100%穿透’且能緊密穩固的與該基板1〇結合成一 體，然而負型光阻之材質通常不透明，會吸收頗多光線 而無法使光線穿透’且其無法緊密穩固的與該基板1〇 結合成一體。再者，可見光或電子束硬化樹脂亦具相似 於紫外光硬化樹脂的性質。在本步驟中，本發明預先準 備一微圖案光罩20 ’其具有數個透光區21，該透光區 21之尺寸、間距及孔形對應於本發明微圖案之預定尺 寸、間距及投影形狀。如第1C圖所示，當光線（紫外光) 通過該微圖案光罩20之透光區21照射該光硬化樹脂層 12 201001014 (i外光硬化樹脂層）時’受光線照射的區域即可硬化 成為數個微圖案1U，而未受光線照射的區域將暫保持 的狀態。在照射光罩期間，該微圖案光罩V。 係不接觸的位於該光硬化樹脂層u之上方兩 =可依既有光罩控制原理力，周整。由於該= 21的解析度極高，因此能確保形成 ^圖案m時的解析度。在本發明中，經由本發明的 :法=造的微圖案111，其尺寸可達_(微米)以 下及間距可達1 〇〇至200um(微米）以下。 请參照第山、2及2人圖所示，本發明第一實施例 之表面具《案的導光板製造方法第时耗：去除該 光硬化樹脂層U未受光線照射的區域，僅留下受光: 照射而硬化的區域成為數個微_ m，因而在該基板 10之表面101上形成一微圖案層U、在本發明 該光硬化樹脂層U受光線照射形成該微圖案ηι之 後，首先停止㈣光線(紫外⑹，接著本發明可選擇使 用有機溶液或叫除該光硬化樹脂層11(紫外光 硬化樹脂層）未受光線騎的區域，依賴似於等向性 或非等向性㈣的原理以及該微圖案光罩2G之透光區 的光栅效應’可控制上述濕式或乾式處理之後的微 圖案111的』面形狀，使該其具有料彡剖面或圓弧形剖 面。該微圖案111共同組成一微圖案層u,。如第2及 2A圖所示’在完成本發明之製造方法後，該基板ι〇及 微圖案層11’共同組成一導光板。 13 201001014 請參照第1A至ID圖所示，在本發明第一實施例之 表面具微圖案的導光板製造方法中，該基板10最初即 具備相同於導光板成品之外形及尺寸，因此在形成該微 圖案層11’後，即直接製得一導光板單元。另一方面， 請參照第3圖所示，在本發明第二實施例之表面具微圖 案的導光板製造方法中，該基板10最初亦可選自一長 條狀之板體(strip)，且本發明可在完成第一至第四步驟 並形成該微圖案層11’後，再將該基板10切割成數個導 光板單元。相較之下，本發明第二實施例之做法有利於 提高單位時間產量並可降低量產成本。 再者，請參照第1A至1D圖所示，在本發明第一實 施例之表面具微圖案的導光板製造方法中，該基板10 係在該第一表面101形成該微圖案層11’。另一方面， 請參照第4A及4B圖所示，在本發明第三實施例之表 面具微圖案的導光板製造方法中，該基板10則是在該 第一表面101形成該微圖案層11’後，進一步利用相同 步驟在該第二表面102形成另一該微圖案層11’。如第 4A及4B圖所示，該基板10之剖視形狀可選擇為矩形 或楔形，且位於該基板10上表面側（例如為該第一表面 101)的微圖案層11’可做為光擴散圖案，可使發光二極 體(LED)或冷陰極螢光燈(CCFL)等侧光源（未繪示）之光 線在射出上表面時，產生光線擴散效果；同時，位於該 基板10底表面側（例如為該第二表面102)的微圖案層 11’則可做為光反射圖案，可使光線在射至底表面時， 14 201001014 產生光線反射效果。在本發明之另一實施方式中，在塗 佈該光硬化樹脂層n的步射所使㈣練化樹脂亦 可均勻的混摻光擴散顆粒或光反射顆粒（未繪示），例如 透光或不透光之二氧化矽顆粒或金屬顆粒等，以增加光 線擴散或反射的效果。 如上所述，相較於習用導光板製造方法或裝置所製 造的導光板受限於壓模之模具表面難以機械加工形成 更精細的壓模圖案，以致於難以製作更精細的微圖案， 且其模具或滾輪在使用期間必需抵壓接觸微圖案材料 而谷易耗損，因此不利於降低後續導光板之製造成本等 缺點’第1A至43圖之本發明係在該基板1〇之其中一 表面上塗佈該光硬化樹脂層11，並利用該微圖案光罩 20進行光硬化樹脂之硬化’及去除未硬化的區域，以 便在該基板1 0表面上形成該微圖案層11，，由於該微圖 案光罩20之透光區21的解析度極高，因此能確保提高 導光板上微圖案111的解析度。再者，本發明之製程僅 利用該光硬化樹脂層11及微圖案光罩2〇，不需搭配使 用光阻的圖案化程序，且該微圖案光罩2〇也不需接觸 該微圖案11之材料，因此可減少該微圖案光罩2〇的耗 損或降低其更換頻率，以延長該微圖案光罩2〇之使用 壽命’並連帶進一步簡化導光板製程及降低導光板之製 造成本。 雖然本發明已以較佳實施例揭露，然其並非用以限 制本發明’任何熟習此項技藝之人士，在不脫離本發明 15 201001014 之精神和範圍内，當可作各種更動與修飾，因此本發明 之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1A、IB、1C及1D圖：本發明第一實施例之表面具 微圖案的導光板製造方法之流程示意圖。 第2及2A圖：本發明第一實施例之表面具微圖案的導 光板之俯視圖及局部放大圖。 第3圖：本發明第二實施例之表面具微圖案的導光板製 造方法之示意圖。 第4A及4B圖：本發明第三實施例之表面具微圖案的 導光板之剖視圖。 101第一表面 11 光硬化樹脂層 111微圖案 21 透光區 【主要元件符號說明 10 基板 102第二表面 11’微圖案層 20 微圖案光罩 1630〇um (micron). In the consistent embodiment, the size of the micropattern is smaller than in the embodiment of the present invention, the distance between the micropatterns is less than 1 〇〇 to 200 um (micrometers) 〇ΐυυ in the resin blending method of the present invention In the example, the photohardenable resin layer is photohardened and dispersed. In the case where the resin is blended with light and/or the embodiment, the photohardenable resin layer is photohardened to emit ruthenium. In the present invention, the (five) 'recording board-long strip-shaped plate body' is formed. After the tea layer, the substrate is cut into a plurality of light guide plates. 9 201001014 [Embodiment] The above and other objects, features and advantages of the present invention will become more apparent and obvious. The details will be described below in conjunction with the drawings. Referring to FIGS. 1A, 1B, 1C, and 1D, the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention is preferably applied to a flat display such as a liquid making device or a display or other lighting or advertising board. The light guide plate manufacturing method of the present invention comprises the following steps: providing a substrate 1; applying a light hardening resin layer 11 on one surface 101 of the substrate 1; The photo-curable resin layer 11 is irradiated through a plurality of light-transmissive regions 21 of a micro-pattern mask 2; and the region where the photo-curable resin layer U is not exposed to light is left only to remain hardened by irradiation of light. A plurality of micropatterns 111 are formed, thereby forming a micropattern layer 11 on the surface 1〇1 of the substrate 1〇. Referring to FIG. 1A, the first step of the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention is to provide a substrate 1 . In this step, the substrate 10 is a plate made of a transparent plastic material, and its shape is generally rectangular in plan view, and its sectional shape is generally rectangular or wedge-shaped, but is not limited thereto. The transparent plastic material of the substrate 10 may be selected from the group consisting of p〇iyethylene terephthalate (PET) or p〇ly (rnethyl methacrylate) (PMMA). The thickness or size of the substrate 1 varies according to the requirements of 10 201001014, and the periphery of the substrate 10 may also selectively have a bonding flange for combination with other components, such as a backlight module frame ( Please refer to the first step of the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention as shown in FIGS. 1A and 1B: coating light on the surface 101 of one surface of the substrate 10. The resin layer 11 is cured. In this step, the substrate 10 has a second surface 1〇1 and a second surface 102. In one embodiment, the first surface 丨〇1 is a bottom surface of the substrate 10 (ie, a reflective surface adjacent to the reflective plate), and the second surface 102 is an upper surface of the substrate 10 (ie, near the diffusion plate or edge) The light-emitting surface of the mirror plate); but in another embodiment, the first surface 101 can also serve as an upper surface (light-emitting surface)' and the second surface 102 can serve as a bottom surface (reflective surface). In the present embodiment, the first surface 101 is not limited to the bottom surface or the upper surface, and the photo-curable resin layer 11 may be formed on the first surface by a spin coating or a doctor blade. The thickness of the photo-curable resin layer η can be varied depending on the needs of the product. In the present invention, the photo-hardened resin layer 11 is selected from a transparent photosensitive resin material, and the light used in the next step is changed correspondingly depending on the material of the photo-curable resin layer u. For example, in the present embodiment, the photo-curable resin layer u is preferably selected from a layer of ultraviolet (UV) hardening resin, and the light is selected from ultraviolet light. In the embodiment, the photo-curable resin layer n may also be selected from the visible light-curable layer of the moonlight, and the light is visible light; or the photo-curable resin layer 11 is selected from the electron beam-hardening resin layer, and the light is Electron beam. After the application of the photo-curable resin layer 11 and before the formation of the micro-pattern layer 12 11 201001014, the substrate 10 is in the absence of light (preferably a matte vacuum environment) to avoid The photohardenable resin layer 11 undergoes unpredictable hardening. Referring to FIG. 1C, a second step of the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention causes a specific light to illuminate the light through a plurality of light transmitting regions 21 of a micropattern mask 20. The resin layer 11 is cured. In the present step, the present invention will be described by taking the photo-curable resin layer 11 as an ultraviolet curable resin layer and the light as ultraviolet light. The ultraviolet light-curable resin layer has a property similar to a negative photo-resist, for example, after irradiating an appropriate light, both of the areas illuminated by the light can be hardened, and the area not irradiated with light can be suitably organic. Solvent or plasma is removed. However, the ultraviolet light-curable resin layer also has properties different from the negative-type photoresist, for example, the material of the ultraviolet-curable resin layer (for example, a cross-linked polymer such as epoxy acrylate and/or urethane acrylate) is usually transparent and The light is almost completely 100% penetrated' and can be tightly integrated with the substrate 1〇, but the material of the negative photoresist is usually opaque, absorbs a lot of light and cannot penetrate the light' and it cannot be tightly stabilized. It is integrated with the substrate 1〇. Further, the visible light or electron beam hardening resin also has properties similar to those of the ultraviolet light curing resin. In this step, the present invention pre-prepares a micropattern mask 20' having a plurality of light transmissive regions 21 having a size, a pitch and a hole shape corresponding to a predetermined size, pitch and projection of the micropattern of the present invention. shape. As shown in FIG. 1C, when light (ultraviolet light) is irradiated through the light-transmitting region 21 of the micro-pattern mask 20 to the light-curable resin layer 12 201001014 (i-external light-hardening resin layer), the area irradiated with light can be It is hardened into a plurality of micro-patterns 1U, and the area not irradiated with light will be temporarily held. The micropatterned mask V during illumination of the reticle. It is located above the photo-hardening resin layer u which is not in contact with each other. Since the resolution of this = 21 is extremely high, the resolution at the time of forming the pattern m can be ensured. In the present invention, the micropattern 111 made by the method of the present invention has a size of up to _ (micrometers) and a pitch of up to 1 〇〇 to 200 um (micrometers) or less. Referring to the figure of the second mountain and the 2nd and 2nd figures, the surface of the first embodiment of the present invention has a time consumption method of manufacturing the light guide plate of the present invention: removing the area where the light hardening resin layer U is not exposed to light, leaving only Receiving light: the region hardened by irradiation becomes a plurality of micro-m, and thus a micro-pattern layer U is formed on the surface 101 of the substrate 10, and after the photo-curable resin layer U of the present invention is irradiated with light to form the micro-pattern ηι, first Stopping (four) light (UV (6), then the invention may choose to use an organic solution or an area in which the light-hardened resin layer 11 (ultraviolet light-hardened resin layer) is not exposed to light, depending on isotropic or anisotropic (4) The principle of the grating and the grating effect of the light-transmissive region of the micro-patterned mask 2G can control the surface shape of the micro-pattern 111 after the wet or dry treatment described above, so that it has a cross-section or a circular arc-shaped cross section. The patterns 111 collectively constitute a micro-pattern layer u. As shown in Figures 2 and 2A, after the manufacturing method of the present invention is completed, the substrate ITO and the micro-pattern layer 11' together constitute a light guide plate. 13 201001014 Please refer to 1A to ID diagram, in In the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention, the substrate 10 is initially provided with the same shape and size as the finished light guide plate. Therefore, after the micropattern layer 11' is formed, a guide is directly prepared. On the other hand, as shown in FIG. 3, in the method for manufacturing a light guide plate having a micropattern on the surface of the second embodiment of the present invention, the substrate 10 may be initially selected from a long strip (for example). Strip), and the present invention can further cut the substrate 10 into a plurality of light guide plate units after completing the first to fourth steps and forming the micro-pattern layer 11'. In contrast, the second embodiment of the present invention It is advantageous to increase the production time per unit time and reduce the mass production cost. Further, as shown in FIGS. 1A to 1D, in the method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention, the substrate 10 is attached to The first surface 101 forms the micro-pattern layer 11'. On the other hand, as shown in FIGS. 4A and 4B, in the method for fabricating a micro-patterned light guide plate according to the third embodiment of the present invention, the substrate 10 is Is on the first surface 101 shape After the micro-pattern layer 11', another micro-pattern layer 11' is further formed on the second surface 102 by the same step. As shown in Figures 4A and 4B, the cross-sectional shape of the substrate 10 can be selected as a rectangle or a wedge. The micro-pattern layer 11' located on the upper surface side of the substrate 10 (for example, the first surface 101) can be used as a light diffusion pattern to enable a light-emitting diode (LED) or a cold cathode fluorescent lamp (CCFL). The light of the side light source (not shown) generates a light diffusing effect when the upper surface is emitted; at the same time, the micro-pattern layer 11' located on the bottom surface side of the substrate 10 (for example, the second surface 102) can be used as light reflection. The pattern allows light to be reflected when it hits the bottom surface, 14 201001014. In another embodiment of the present invention, the step of applying the photo-curable resin layer n allows the (4) polishing resin to uniformly blend light-diffusing particles or light-reflecting particles (not shown), such as light-transmitting. Or opaque cerium oxide particles or metal particles, etc., to increase the effect of light diffusion or reflection. As described above, the light guide plate manufactured by the conventional light guide plate manufacturing method or apparatus is limited in that the mold surface of the stamper is difficult to be machined to form a finer stamper pattern, so that it is difficult to produce a finer micropattern, and The mold or the roller must be pressed against the micro-pattern material during use, and the valley is easily depleted, so that it is disadvantageous for reducing the manufacturing cost of the subsequent light guide plate, etc. The invention of the first to fourth embodiments is on one of the surfaces of the substrate 1 Coating the photo-curable resin layer 11 and performing hardening of the photo-curing resin by the micro-pattern mask 20 and removing the uncured region to form the micro-pattern layer 11 on the surface of the substrate 10, due to the micro Since the resolution of the light-transmitting region 21 of the pattern mask 20 is extremely high, it is possible to ensure an improvement in the resolution of the micro-pattern 111 on the light guide plate. Furthermore, the process of the present invention utilizes only the photo-curable resin layer 11 and the micro-pattern mask 2, without the need for a patterning process using photoresist, and the micro-pattern mask 2 does not need to contact the micro-pattern 11 The material can reduce the wear of the micro-pattern mask 2 降低 or reduce the frequency of replacement to extend the service life of the micro-pattern reticle 2 ′ and further simplify the light guide plate process and reduce the manufacturing cost of the light guide plate. Although the present invention has been disclosed in its preferred embodiments, it is not intended to limit the invention to those skilled in the art, and various changes and modifications may be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A, IB, 1C and 1D are schematic views showing the flow of a method for manufacturing a light guide plate having a micropattern on the surface of the first embodiment of the present invention. 2 and 2A are plan views and partial enlarged views of a light guide plate having a micropattern on the surface of the first embodiment of the present invention. Fig. 3 is a view showing a method of manufacturing a light guide plate having a micropattern on the surface according to a second embodiment of the present invention. 4A and 4B are cross-sectional views of a light guide plate having a micropattern on the surface of a third embodiment of the present invention. 101 first surface 11 photo-curing resin layer 111 micro-pattern 21 light-transmitting region [main element symbol description 10 substrate 102 second surface 11' micro-pattern layer 20 micro-pattern mask 16