1263870 玫、發明說明 【發明所屬之技術領域】 本發明是有關於一種壓印(imprinting)製程,且特別 疋有關於^一種奈米壓印(Nanoimprinting)製程。 【先前技術】 目前的奈米壓印技術係先將蝕刻阻劑均勻地塗佈於 基材上,再將壓印模板下壓於蝕刻阻隔層,藉以將壓印模 板上之圖案轉移到蝕刻阻隔層。若以壓印製程之温度進行 區分’則可分為高溫壓印製程與低溫壓印製程。 請參照第1圖至第3圖,第i圖至第3圖係緣示習知 高溫壓印之製程剖面圖。高溫壓印製程中,首先提供基材 1〇〇,再於基材1〇〇上塗佈蝕刻阻隔層1〇2。其中,蝕刻 P隔層1 02之材質需選用熱可塑性高分子材料。接著,如 第1圖所不,提供壓印模板1〇4,此壓印模板104之表面 上具有圖案106。 一接下來,先進行加熱步驟,以使製程溫度大於蝕刻阻 隔層102的玻璃轉化溫度(Tg)。再將壓印模板ι〇4下壓於 蝕刻阻隔層102上,以將壓印模板1〇4之圖案1〇6轉印至 π ^阻隔層102,如第2圖所示。然後,移去熱源,待降 i進行離形動作,而將壓印模板i 〇4從蝕刻阻隔層1 移開,即可得到與壓印模板i 〇4之圖案丨〇6互補之壓印 圖案1〇8於基材100之姓刻阻隔層102上,如第3圖所示。 5月苓照第4圖至第6圖,第4圖至第6圖係繪示習知 1263870 低C印之製私剖面圖。在低溫壓印製程中,首先提供基 材200,再於基材200表面上塗佈光阻層202。其中,光 阻層2〇2之材質為照光可聚合材料。接著,如帛4圖所示, 提供壓印模板204,此壓印模板2G4之表面上具有圖案 206。其中,壓印模板2〇4之為可透光模板。 隨後,將壓印模板204下壓在光阻層2〇2上,使光阻 層202填入壓印模才反2〇4之圖f 2〇"。再利用光· 於壓印模板204上進行照射,如第5圖所示。其中,光 2〇8為紫外光。經短波長的紫外光短時間照射,可使光阻 層202產生聚合固化。然後,進行離形步驟,而將壓印模 板204 I虫刻阻隔| 202 Ji f多開,gp可得到與壓印模板 204之圖案206互補之壓印圖案21〇於基材2〇〇之蝕刻阻 隔層202上,如第6圖所示。 目前的高溫壓印製程中’需加熱至阻劑之玻璃轉化溫 度以上’方可進行壓印動作,也才能使阻劑填人壓印模板 的微圖案中。由於阻劑收縮僅需考慮高分子於加熱冷卻後 的收縮,因此具有尺寸安定之優勢。然而,較高的操作溫 度會使基材變形,並不適詩_般可撓區的塑膠基材,尤 其是低玻璃轉化溫度的材料;此外,高溫壓印製程需於高 於阻劑玻璃轉化溫度下’施高遷使具流動性的阻劑填入塵 印模板,此時阻劑的流動性並無法完全填滿微米級的圖 案,因此不適合用於微米級圖案之轉印。 另一方面,在低溫壓印過程中,光阻劑單體必須先 入圖案結射,再進行照光聚合反應。m求光阻劑 1263870 之聚合達均勻快速,而通常會在光阻劑配方中加入適量之 架橋劑,但也因而引起較大的尺寸收縮。由於低溫壓印技 術並不需施加高溫高壓,因此故較適用於對一些塑膠基材 之光阻劑的圖案轉印,且此技術之轉印脫模均可在數秒内 完成。然而,其低溫壓印製程上需要特製之石英模板使短 波長的光源穿透提供聚合能量,故成本較高;此外,光阻 劑聚合時,會產生架橋反應,因此轉印圖案之收縮變形亦 較嚴重。 【發明内容】 因此,本發明之目的就是在提供一種壓印製程,適用 於微米尺度至奈米尺度之圖案的壓印,其係整合高溫壓印 與低溫壓印兩種壓印技術的優點,並調配新配方使壓印可 以同時適用於軟硬基材,以改善現有壓印技術的缺點。 本發明之另一目的是在提供一種壓印製程,可在高溫 壓印法所無法達到之低溫度下操作。因此,本發明可應用 在可撓曲基材上,更具有低操作壓力,進而可採用軟硬模 板。且,與低溫壓印製程相較之下,本發明之尺寸安定性 較佳,並具有良好的蝕刻選擇性。 根據本發明之上述目的,提出一種壓印製程,至少包 括:提供-壓印模板,其中此壓印模板之一表面具有一圖 案;形成-熱穩定高分子聚合物層覆蓋於上述之壓印模板 :表面上’其中此熱穩定高分子聚合物層填平壓印模板之 回案’且此熱穩定高分子聚合物層與上述之壓印模板之表 1263870 面接觸之一表面上具有相對於此圖案之互補圖案;形成一 光阻層覆蓋於上述之熱穩定高分子聚合物層上;形成一透 月基材覆盍在上述之光阻層上;進行一照射步驟,藉以使 光阻層產生聚合,翻轉上述之壓印模板並移除此壓印模 板’以暴露出熱穩定高分子聚合物層之表面上之互補圖 案’以及進行一圖案化步驟,藉以將熱穩定高分子聚合物 層之表面上之互補圖案轉移至透明基材上。 依照本發明一較佳實施例,於提供壓印模板之步驟與 形成熱穩定高分子聚合物層之步驟間,更至少包括利用表 面活性較低之離形劑對壓印模板之該表面進行脫模處 理,以利於圖案轉移完成後順利移開壓印模板。 由上述可知,本發明之壓印製程適用於製作的微米級 或奈米級圖案,且具有可在低溫下操作、適用多種模板、 不需下壓力、收縮率低以及可應用於可撓曲基材上等優 點〇 【實施方式】 本發明揭露一種壓印製程,適用於製作微米或奈米圖 案,且可在低操作溫度與低操作壓力下製作,並適用於4 撓曲基材’更具有優良之尺寸安定性。為了使本發明之敘 述更加詳盡與完備,可參照下列描述並配合第7 12圖之圖示。 乐 請參照第7圖至第12圖,第7圖至第12圖係繪示 照本發明-較佳實施例的一種壓印之製程剖面圖。:本 1263870 明之壓印製程中,首先提供壓印模板3 00,其中此壓印模 板300之表面上具有微結構之圖案302,且壓印模板3〇〇 可如第7圖所示。在本發明中,壓印模板3〇〇可為軟質或 硬質之模板,例如玻璃、石英、矽晶片或橡膠等。接下來, 在利用此壓印模板300進行壓印前,較佳是先對壓印模板 300進行脫模處理。壓印模板3〇〇之脫模處理,首先係先 將壓印模板300浸入絕對酒精/二次水之溶液中,其中絕 對酒精與二次水之體積比例較佳可為丨:丨。再將壓印模板 300浸人絕對酒精。在壓印模板綱依序浸泡在絕對酒精 /二次水溶液與絕對酒精時,利用例如超音波洗淨器進行 超音波震盪處理,其中此超音波震盪處理較佳是進行2〇 分鐘。接下來,利用例如氮氣…2)吹拂,以乾燥壓印模板 300,而確實去除壓印模板3〇〇上之雜質與水氣。隨後, 將壓印模板300浸入低表面活性離形劑之溶液中,且較佳 可於乾燥的環境中靜置4小時,藉以對壓印模板3〇〇之表 面進行改質處理,以利壓印模板3〇〇於壓印結束後能輕易 地與阻劑離形,以形成完整的阻劑圖案轉印。其中,上述 之低表面活性離形劑較佳可例如為1H,1H,2H,2h-全氟 癸 基-三 氯矽烷 (lH,lH’2H’2H-perfluor〇decyl-trichl〇rosuane)或十八烷基 二氯矽烷(Octadecyltrichlorosilane ; 〇TS), 液中。舉例而言,當壓印模板3〇〇採用矽晶片,且採用十 八烷基三氯矽烷溶液時,可將矽晶片表面上改質以十八烷 1263870 基三氣石夕烧之自組性單分子層,亦即將以片表面之官能 基由氫氧基(-_轉變成三氟甲基(Μ) ή基(_cH3) 的官能基。 完成壓印模板300表面之脫模處理後,將壓印模板 300浸入熱穩定高分子聚合物溶液中。在此同時,較佳是 利用例如超音波震盈器進行超音波震盈持續2〇分鐘,藉 以將壓印模板300上圖案302之微結構中的氣泡去除,而 使熱穩定高分子聚合物能確實填人輯3〇2之凹陷區域 中,進而形成熱穩定高分子聚合物薄膜3〇4填滿壓印模板 300表面上之圖案302。於献瘥\ 1 、…、L疋鬲分子聚合物薄膜3 0 4 形成後,隨即利用熱穩定高分子聚合物溶液並以例如旋轉 塗佈方式形成均勻熱穩定高分子聚合物薄膜3〇6覆蓋在 熱穩定高分子聚合物薄膜304上,如第8圖所示。轨移定 南分子聚合物薄膜3〇4與熱穩定高分子聚合物薄膜3〇6 構成熱穩定高分子聚合物堆疊層。其中’上述之教穩定高 tr聚合物溶液較佳為熱穩定高分子聚合物之氯苯溶液 0熱=高分子聚合物之甲苯溶液。在本發明中,熱穩定 冋刀子4合物薄膜_與熱穩定高分子聚合物薄膜306 ,:質較佳可為耐反應性離子钱刻如一 _ / =RIE)之乾式_的高分子材料或具低熱收縮性 二子材料。在本發明之較佳實施例中,熱穩^高分 “勿薄膜304與熱穩定高分子聚合物薄膜3 為 聚甲基丙烯酸甲萨r , / , u材貝可為 ^ ^ [poJy(methyl methyacrylate); 、聚苯乙烯(Ps)或聚碳酸酯(PC)。其中,聚甲基丙 I263870 烯酸曱酿之分子量較佳為7〇〇〇〇。 形成熱穩定高分子聚合物薄膜3〇6 塗佈之轉速控制在每分鐘1000轉㈣,且::將严轉 秒。於旋轉塗佈形成熱釋定古八 、、男進仃30 ,^ ^ %疋回刀子聚合物薄膜306後,^ P行:烤處理’以將殘餘之溶液除去。在此較佳: ’在每-次旋轉塗佈後,均進行—次烘烤處理 處理較佳是在1〇5。。之溫度下棋烤5分鐘。^ 較佳實施例[可多次旋轉塗佈濃度約為⑽之;甲: =:=苯溶液,以使所形成之熱穩定高分子聚: ^ 306的表面更佳地平坦’更可使熱穩定高分子聚合 構成6主要係由收縮率較小之聚甲基丙烯酸甲酉旨所 ,熱穩定高分子聚合物薄膜3()4與熱敎高分 ^勿^膜3G6形成後,利用例如旋轉塗佈技術形成光阻層 叮^熱較高分子聚合物薄膜鳩上。光阻層3〇8 可為先硬化預聚物層(PhQtc)eurable 〇Ug。· U㈣, 阻層3G8之材質較佳為低黏度之光阻劑,以提升光阻層 塗佈之均勻度。其中’此低黏度之光阻劑至少包括^ 始劑、單體以及預聚物。在本發明之較佳實施例 :光阻劑包括。約…光起始劑、約請 < 預聚物' _ 。之單g忐基單體以及約為40%之雙官能基單 ' 於$成光阻層308時,可以兩段轉速方式進行 =轉土佈。先以1000 rPm之轉速進行ίο秒,使光阻劑 能佈滿熱穩定高分子聚合物薄膜306,並且填平熱穩定高 12 1263870 、"令合物薄膜3〇6上之不平處。再以4⑻〇 rpm之轉速 3 〇秒,藉以使光阻劑於熱穩定高分子聚合物薄膜 3 06 ^^1/ 、 勻一之薄層。如此一來,可使光阻層3〇8之表面 更加的平坦。 ^光阻層308形成後,於光阻層3〇8上施加基材31〇, 而形成如第9圖所示之結構,其中基材3 10可例如為矽晶 導體基板、導電玻璃、印刷電路軟板或透明導 夕。在本發明中,基材31 〇之材質較佳為透明,且基材 、1 0軚佳為可撓曲。在本發明之一較佳實施例中,基材3 1 〇 為由氧化銦錫(ITO)層與聚酯(PET)層所構成之堆疊結 構’且氧化銦錫層與光阻層3〇8接觸。 、接著,請參照第10圖,利用光312於基材310上方 f行照射,藉以使光阻層308之光阻劑聚合完全。其中, "、、、射之日守間較佳可持續約3 〇秒。光3 1 2只要含紫外光區 域均可,並不限深紫外光區域或近紫外光區域,且光3D 亦不需為單一波長。 然後,可先翻轉壓印模板300以及位於其上之材料 層,藉以使壓印模板300位於熱穩定高分子聚合物薄膜 3〇4之上方。再將壓印模板3〇〇從熱穩定高分子聚合物薄 膜304上分離,並移開壓印模板3〇〇。如此一來,即可於 基材310上方之熱穩定高分子聚合物薄膜3〇4的表面上形 成與原壓印模板300之圖案302相互補之圖案314,如第 11圖所示。 本發明之一特徵就是因為無需將熱穩定高分子聚合 13 口63870 物/專膜3 0 4加熱至其玻璃轉化溫度以上,因此可在低溫度 下進行圖案壓印,進而可應用在較不耐高溫之可撓曲基材 上。且,熱穩定高分子聚合物薄膜3〇4表面上之圖案314 的形成無需藉助下壓力,因此本發明具有低操作壓力,而 可採用軟硬模板來進行圖案壓印。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an imprinting process, and more particularly to a nanoimprinting process. [Prior Art] The current nanoimprint technology firstly applies an etch resist uniformly on a substrate, and then presses the imprint template on the etch barrier layer, thereby transferring the pattern on the imprint template to the etch barrier. Floor. If it is distinguished by the temperature of the imprint process, it can be divided into a high temperature imprint process and a low temperature imprint process. Referring to Figs. 1 to 3, the i-th to the third drawings show a cross-sectional view of a conventional high temperature imprint process. In the high-temperature imprinting process, the substrate is first provided, and then the etching barrier layer 1〇2 is coated on the substrate 1〇〇. Among them, the material of the etched P spacer 102 needs to be a thermoplastic polymer material. Next, as shown in Fig. 1, an imprint template 1〇4 is provided, and the imprint template 104 has a pattern 106 on its surface. Next, a heating step is performed to make the process temperature greater than the glass transition temperature (Tg) of the etch barrier layer 102. The embossing template ι 4 is then pressed down onto the etch barrier layer 102 to transfer the pattern 1 〇 6 of the embossing stencil 1 〇 4 to the π ^ barrier layer 102 as shown in FIG. Then, the heat source is removed, and the squeezing action is performed, and the embossing template i 〇4 is removed from the etch barrier layer 1 to obtain an embossed pattern complementary to the pattern 丨〇6 of the embossing template i 〇4. 1〇8 is on the barrier layer 102 of the substrate 100, as shown in FIG. In May, please refer to Figure 4 to Figure 6. Figure 4 to Figure 6 show the private profile of the conventional 1263870 low C-print. In the low temperature imprint process, the substrate 200 is first provided, and then the photoresist layer 202 is coated on the surface of the substrate 200. The material of the photoresist layer 2〇2 is an illuminating polymerizable material. Next, as shown in Fig. 4, an imprint template 204 is provided having a pattern 206 on the surface of the imprint template 2G4. Wherein, the imprint template 2〇4 is a light transmissive template. Subsequently, the imprint template 204 is pressed down on the photoresist layer 2〇2, and the photoresist layer 202 is filled into the imprinting mold to reverse the image of the image b2〇". The light is again applied to the imprint template 204 as shown in Fig. 5. Among them, the light 2 〇 8 is ultraviolet light. The short-wavelength ultraviolet light is irradiated for a short period of time to cause the photoresist layer 202 to be polymerized and cured. Then, the dicing step is performed, and the embossing template 204 I is etched by the etched template, and the etched pattern 21 complementary to the pattern 206 of the embossing template 204 is etched on the substrate 2 〇〇. On the barrier layer 202, as shown in FIG. In the current high-temperature imprinting process, it is necessary to heat up to the glass transition temperature of the resist to perform the imprinting operation, and the resist is filled in the micropattern of the imprint template. Since the shrinkage of the resister only needs to consider the shrinkage of the polymer after heating and cooling, it has the advantage of dimensional stability. However, higher operating temperatures can deform the substrate and are not suitable for plastic substrates in the flexible region, especially for low glass transition temperatures; in addition, high temperature imprinting processes require higher than the resist glass transition temperature. Under the 'Shi Gaoqian', the fluid resist is filled into the dust-printing template. At this time, the fluidity of the resist cannot completely fill the micro-scale pattern, so it is not suitable for the transfer of micro-scale patterns. On the other hand, in the low-temperature imprinting process, the photoresist monomer must first be patterned and then subjected to photopolymerization. The polymerization of the photoresist 1263870 is uniform and fast, and an appropriate amount of bridging agent is usually added to the photoresist formulation, but this causes a large dimensional shrinkage. Since low temperature imprint technology does not require high temperature and high pressure, it is more suitable for pattern transfer of photoresists on some plastic substrates, and the transfer and release of this technology can be completed in a few seconds. However, a special quartz template is required for the low-temperature imprinting process to make the short-wavelength light source penetrate to provide polymerization energy, so the cost is high; in addition, when the photoresist is polymerized, a bridging reaction occurs, and thus the shrinkage deformation of the transfer pattern is also More serious. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an imprint process suitable for imprinting of micron-to-nano-scale patterns, which combines the advantages of both high-temperature imprinting and low-temperature imprinting. The new formulation allows the embossing to be applied to both soft and hard substrates to improve the shortcomings of existing embossing techniques. Another object of the present invention is to provide an imprint process that can be operated at low temperatures not possible with high temperature imprinting. Therefore, the present invention can be applied to a flexible substrate, and has a low operating pressure, and a soft and hard template can be employed. Moreover, the present invention has better dimensional stability and good etch selectivity as compared with the low temperature imprint process. According to the above object of the present invention, an imprint process is provided, comprising at least: providing an imprint template, wherein one surface of the imprint template has a pattern; forming a thermally stable polymer layer covering the imprint template described above : on the surface, wherein the thermally stable polymer layer is filled with the imprint template, and the surface of the thermally stable polymer layer is in surface contact with the surface of the imprint template 1263870. a complementary pattern of the pattern; forming a photoresist layer covering the thermal stable polymer layer; forming a moon-permeable substrate overlying the photoresist layer; performing an irradiation step to generate the photoresist layer Polymerizing, flipping the above-mentioned imprint template and removing the imprint template 'to expose the complementary pattern on the surface of the thermally stable polymer layer' and performing a patterning step whereby the thermally stable polymer layer is The complementary pattern on the surface is transferred to a transparent substrate. According to a preferred embodiment of the present invention, between the step of providing an imprint template and the step of forming a thermally stable polymer layer, at least the surface of the imprint template is removed by using a surfactant having a lower surface activity. Mold processing to facilitate the smooth removal of the imprint template after the pattern transfer is completed. As can be seen from the above, the imprint process of the present invention is suitable for the fabrication of micron or nanoscale patterns, has the ability to operate at low temperatures, is suitable for a variety of stencils, requires no downforce, has low shrinkage, and can be applied to flexible substrates. Advantages of the material [Embodiment] The present invention discloses an imprint process suitable for making micro or nano patterns, and can be fabricated at low operating temperatures and low operating pressures, and is suitable for 4 flex substrates. Excellent dimensional stability. In order to make the description of the present invention more detailed and complete, reference is made to the following description and in conjunction with the diagram of Figure 7-12. Referring to Figures 7 through 12, Figures 7 through 12 illustrate a cross-sectional view of an imprint process in accordance with the preferred embodiment of the present invention. In the imprint process of this 1263870, an imprint template 300 is first provided, wherein the imprint template 300 has a microstructured pattern 302 on its surface, and the imprint template 3 is as shown in FIG. In the present invention, the imprint template 3 can be a soft or rigid template such as glass, quartz, tantalum wafer or rubber. Next, before the imprinting using the imprint template 300, it is preferable to perform the mold release treatment on the imprint template 300. The mold release process of the embossing template 3 is firstly immersed in the absolute alcohol/secondary water solution, wherein the volume ratio of the absolute alcohol to the secondary water is preferably 丨: 丨. The imprint template 300 is then immersed in absolute alcohol. When the imprinting template is sequentially immersed in the absolute alcohol/secondary aqueous solution and absolute alcohol, the ultrasonic oscillating treatment is performed by using, for example, an ultrasonic cleaner, wherein the ultrasonic oscillating treatment is preferably performed for 2 〇 minutes. Next, the imprint template 300 is dried by, for example, nitrogen gas, 2), and the impurities and moisture on the imprint template 3 are surely removed. Subsequently, the imprint template 300 is immersed in a solution of the low surface active release agent, and preferably allowed to stand in a dry environment for 4 hours, thereby modifying the surface of the imprint template 3 crucible to facilitate pressure The stamp 3 can be easily removed from the resist after the end of the stamp to form a complete resist pattern transfer. Wherein, the above low surface active releasing agent is preferably, for example, 1H, 1H, 2H, 2h-perfluorodecyl-trichlorodecane (lH, lH'2H'2H-perfluor〇decyl-trichl〇rosuane) or ten Octadecyltrichlorosilane (〇TS), in solution. For example, when the embossing template 3 is a ruthenium wafer and an octadecyltrichlorosilane solution is used, the surface of the ruthenium wafer can be modified to be self-assembled by the octadecane 1263870-based three-gas sinter. The monolayer, that is, the functional group based on the surface of the sheet is converted from a hydroxyl group (-_ to a functional group of a trifluoromethyl(fluorene) fluorenyl group (_cH3). After the release of the surface of the imprint template 300 is completed, The imprint template 300 is immersed in the thermally stable polymer solution. At the same time, the ultrasonic shock is preferably used for, for example, an ultrasonic shock absorber for 2 minutes, whereby the microstructure of the pattern 302 on the imprint template 300 is used. The bubble is removed, and the thermally stable polymer can be surely filled in the recessed area of 3〇2, and the thermally stable polymer film 3〇4 is formed to fill the pattern 302 on the surface of the stamping template 300. After the formation of the 瘥 瘥 1 1 1 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲 疋鬲In the thermally stable polymer film 304 As shown in Fig. 8, the orbital shifting south molecular polymer film 3〇4 and the thermally stable polymer film 3〇6 constitute a thermally stable polymer stack layer, wherein the above-mentioned teaching stabilizes high tr polymer The solution is preferably a chlorobenzene solution of a thermally stable polymer 0 heat = a toluene solution of a polymer. In the present invention, a thermally stable 冋 knife 4 film _ and a thermally stable polymer film 306 are: The material may preferably be a dry-type polymer material or a low heat-shrinkable two-substrate material which is resistant to reactive ion energy such as _ / = RIE. In a preferred embodiment of the present invention, the heat stable high score "Do not film 304 and the thermally stable polymer film 3 is polymethyl methacrylate, /, u material can be ^ ^ [poJy (methyl Methyacrylate), polystyrene (Ps) or polycarbonate (PC), wherein the molecular weight of polymethylpropane I263870 is preferably 7 〇〇〇〇. Forming a thermally stable polymer film 3〇 6 The speed of coating is controlled at 1000 rpm (four), and:: will be strictly turned to the second. After spin coating to form a heat release, the male 仃 30, ^ ^ % 疋 刀 knife polymer film 306, ^ P row: baking treatment 'to remove the residual solution. Here, it is preferred: 'After each spin coating, the baking treatment is preferably performed at a temperature of 1 〇 5. Bake for 5 minutes. ^ Preferred embodiment [multiple spin coating concentration is about (10); A: =: = benzene solution to make the formed thermally stable polymer poly: ^ 306 surface is better flat ' Further, the thermally stable polymer can be composed of 6 mainly composed of a polymethyl methacrylate with a small shrinkage ratio, and a thermally stable polymer film 3 ( After the formation of the film 4G with the hot 敎 high score ^Do not film 3G6, the photoresist layer is formed by a spin coating technique, for example, by using a spin coating technique. The photoresist layer 3 〇 8 can be a hardened prepolymer. Layer (PhQtc) eurable 〇Ug.· U(4), the material of the barrier layer 3G8 is preferably a low-viscosity photoresist to improve the uniformity of the coating of the photoresist layer. The low-viscosity photoresist includes at least Agents, monomers and prepolymers. In a preferred embodiment of the invention: the photoresist comprises: a photoinitiator, an approx. <prepolymer' When 40% of the bifunctional base is used in the photoresist layer 308, it can be rotated in two stages. The soil is first transferred at a speed of 1000 rPm for τ seconds, so that the photoresist can be filled with thermally stable polymer. Film 306, and fill in the heat stable high 12 1263870, " the film on the 3〇6 unevenness. Then at 4 (8) rpm rpm for 3 〇 seconds, so that the photoresist is thermally stable polymer The thin film 3 06 ^^1/, a uniform thin layer, so that the surface of the photoresist layer 3 〇 8 can be made more flat. ^ After the photoresist layer 308 is formed, The substrate 31 is applied to the photoresist layer 3 to form a structure as shown in Fig. 9, wherein the substrate 3 10 can be, for example, a twinned conductor substrate, a conductive glass, a printed circuit board or a transparent eve. In the present invention, the material of the substrate 31 is preferably transparent, and the substrate, preferably 10, is flexible. In a preferred embodiment of the invention, the substrate 3 1 is made of indium tin oxide ( The stacked structure of the ITO) layer and the polyester (PET) layer is in contact with the indium tin oxide layer and the photoresist layer 3〇8. Next, referring to FIG. 10, the light 312 is irradiated on the substrate 310 at a distance f, whereby the photoresist of the photoresist layer 308 is completely polymerized. Among them, ",,, and the day of the shoot is better to last about 3 sec. The light 3 1 2 is not limited to a deep ultraviolet region or a near ultraviolet region as long as it contains an ultraviolet region, and the light 3D does not need to be a single wavelength. Then, the imprint template 300 and the material layer thereon may be turned over so that the imprint template 300 is positioned above the thermally stable polymer film 3〇4. Further, the imprint template 3 is separated from the thermally stable polymer film 304, and the imprint template 3 is removed. In this way, a pattern 314 complementary to the pattern 302 of the original imprint template 300 can be formed on the surface of the thermally stable polymer film 3〇4 above the substrate 310, as shown in FIG. One of the features of the present invention is that since the thermostable polymer polymerization 13 port 63870/specific film 300 is not heated to above its glass transition temperature, pattern imprinting can be performed at a low temperature, and thus it can be applied to less resistant. High temperature flexible substrate. Further, the formation of the pattern 314 on the surface of the thermally stable polymer film 3〇4 does not require the use of a downforce, so that the present invention has a low operating pressure, and a soft and hard template can be used for pattern imprinting.
在壓印完成並於基材3 10上方形成與圖案3〇2互補之 圖案314後,進行基材31〇之圖案化步驟,藉以將熱穩定 高分子聚合物薄膜304表面上之圖案314轉移至基材3u 上圖案化基材3 10日夺,首先利用例如乾式钱刻方式移除 f分之熱穩定高分子聚合物薄冑3〇“乂及部y分之熱穩定 南分子聚合物薄膜306,直至暴露出部分之光阻層則為 止。其中,所暴露出之光阻層308的區域為圖案314之凹 陷區域的下方。在本發明之較佳實施例中,上述 刻係先將基材310連同苴上紝構.署Λ ^ 式钱 f T U,、上、、Ό構層置入例如反應性離子 :虫刻之㈣機的反應腔體内,再以例如氧氣電漿對熱穩定 间分子聚合物薄膜304以及熱穩定高分子 /After the embossing is completed and a pattern 314 complementary to the pattern 3〇2 is formed over the substrate 3 10, a patterning step of the substrate 31 is performed to transfer the pattern 314 on the surface of the thermally stable polymer film 304 to The patterned substrate 3 on the substrate 3u is etched for 10 days, and the heat-stabilized polymer film 306 of the heat-stabilized polymer layer of the 分 and y is removed by, for example, dry-cutting. Until a portion of the photoresist layer is exposed, wherein the exposed region of the photoresist layer 308 is below the recessed region of the pattern 314. In a preferred embodiment of the invention, the engraved substrate is first 310 together with the 纴 纴 . 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 Molecular polymer film 304 and thermally stable polymer /
進行乾式蝕刻。在本發明中,由用之°潯膘306 的姑村、,^r & . 田於所知用之光阻層308 ,亚不能以氧電黎去除,因此當部分之 =路出來時,基材31〇上方之_圖案的縱深將會急 1後,利用例如乾式⑽^式,並於氧電漿中捧 含鼠氣體之電漿移除部分之熱穩 μ心入 -…暴露之光阻層·,直至熱穩二 膜304之圖案314的凹陷區域下方的光阻声 °溥 露出底下之美材310ΑΙ» ^ ^ 移除而暴 基材0為止。其中,含氣氣體之電裝的摻人 14 1263870 1=二!除暴露;光阻層3°8。待圖之凹陷區 除暴Γ之^ Ϊ1G暴露出後,制例如濕式_的方式移 i j10的一部分。如此-來,可將熱穩定高分 :二才勿薄膜綱之圖案314轉移至基材310之表面,而 土 310表面上形成圖案316,如第12圖所示。在本 ^明之較佳實施例中’上述之濕式餘刻係將基材31〇連同 餘刻基材310。 …為…之卓酸溶液中,藉以 、由上述本發明較佳實施例可知,本發明之壓印製程可 用以製作微米級或奈米級圖案,且本發明之壓印製程可在 高温壓印法所無法達到之低溫度下操作。因此,不僅可應 用在可撓曲基材上,更具有低操作壓力而可適用於軟硬模 板’具有極佳之應用性。 由上述本發明較佳實施例可知,與低溫壓印製程相較 之下,本發明之壓印圖案的尺寸安定性較佳,並具有良好 的钱刻選擇性。 雖然本發明已以一較佳實施例揭露如上,然其並非用 以限定本發明,任何熟習此技藝者,在不脫離本發明之精 砷和範圍内,當可作各種之更動與潤飾,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1圖至第3圖係繪示習知高溫壓印之製程剖面圖。 第4圖至第6圖係繪示習知低溫壓印之製程剖面圖。 15 1263870 第7圖至第1 2圖係繪示依照本發明一較佳實施例的 一種壓印之製程剖面圖。 元件代表符號簡單說明】 100 :基材 102 :蝕刻阻隔層 104 :壓印模板 108 :壓印圖案 202 :光阻層 206 :圖案 2 1 0 :壓印圖案 302 :圖案 106 :圖案 200 :基材 204 :壓印模板 208 :光 300 :壓印模板Dry etching is performed. In the present invention, the use of the photoresist layer 308 of the 浔膘 、 306, ^ & 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 The depth of the pattern above the substrate 31 will be an acute one, using, for example, a dry type (10), and holding the plasma-removed portion of the plasma containing the rat gas in the oxygen plasma. The resist layer, until the photoresist underneath the recessed area of the pattern 314 of the heat-stable film 304 exposes the underlying material 310ΑΙ»^^ to remove the substrate 0. Among them, the inclusion of gas-filled electric equipment 14 1263870 1=two! Except for exposure; photoresist layer 3 ° 8. The depressed area to be imaged is removed from the turbulent Ϊ 1G, and a part of i j10 is moved, for example, in a wet manner. In this way, the heat stable high score: the pattern 314 of the film is transferred to the surface of the substrate 310, and the pattern 316 is formed on the surface of the soil 310, as shown in Fig. 12. In the preferred embodiment of the present invention, the above-described wet residual is the substrate 31 together with the residual substrate 310. In the acid solution of the present invention, the imprint process of the present invention can be used to fabricate micron- or nano-scale patterns, and the imprint process of the present invention can be imprinted at high temperature. Operating at low temperatures that cannot be achieved by law. Therefore, it can be applied not only to a flexible substrate but also to a low operating pressure and to a soft and hard template, which has excellent applicability. As is apparent from the above preferred embodiment of the present invention, the embossed pattern of the present invention has better dimensional stability and good cost selectivity as compared with the low temperature imprint process. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and any skilled person skilled in the art can make various changes and modifications without departing from the scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 to Fig. 3 are cross-sectional views showing a process of conventional high temperature imprinting. 4 to 6 are cross-sectional views showing a process of conventional low temperature imprinting. 15 1263870 FIGS. 7 through 12 are cross-sectional views showing a process of imprinting in accordance with a preferred embodiment of the present invention. Brief Description of Component Representation Symbol 100: Substrate 102: Etch Barrier Layer 104: Imprint Template 108: Imprint Pattern 202: Photoresist Layer 206: Pattern 2 1 0: Imprint Pattern 302: Pattern 106: Pattern 200: Substrate 204: Imprint template 208: Light 300: Imprint template
3 04 :熱穩定高分子聚合物薄膜 3 06 :熱穩定高分子聚合物薄膜 3 1 0 :基材 314 :圖案 308 :光阻層 3 12 :光 316 :圖案3 04 : Thermally stable polymer film 3 06 : Thermally stable polymer film 3 1 0 : Substrate 314 : Pattern 308 : Photoresist layer 3 12 : Light 316 : Pattern
1616