光學薄膜之壓印

Imprinting of Optical-Film

鄧哲明(Je-Ming Teng)

指導教授 ： 林清彬

淡江大學/工學院/機械與機電工程學系碩士班/碩士(2007年)

https://doi.org/10.6846/TKU.2007.01000

摘要

本研究將開發微結構滾壓轉印製程之設備，並利用高分子光固化樹脂與可撓性透光高分子材，採取紫外光固化技術快速成型，在低溫低壓下的良好轉印特質，建立光固化之連續翻印製程。同時也開發新式的微結構母模製作方式，採用灌注的製作方式，直接在塑橡膠模帶上刻劃出表面具微米結構的軟性模帶與軟性滾輪，來取代傳統熱滾壓微結構輪。期望在滾輪成型技術中，創造新式的母模翻印方式，而能利用於光學薄膜的連續性複製成型。
在選擇製作微結構母模的材料中，可以確定PDMS與921型矽橡膠能精準的複製微米級之表面結構，且製作成微結構母模後，也可順利翻印成型。但是製作過程，需考慮微結構輪與模帶的真圓度、真直度與表面平整性，以避免在壓印時會有壓印不均勻以及部分壓印區域光固化樹酯無法填充完全的現象產生。實驗中也探討軟性模帶與滾輪製作缺陷，對於成型的效果。在機台設計方面，發現機台壓輪機構的設計與可撓性底材的張力控制機構，直接影響成模的失真性與均勻性。上膠設備也需要作調整，否則膠體塗層的均勻直接反應在成型厚度均勻性。對於翻印成型的光學薄膜，也針對各種缺陷來探討發生原因與改善方法。並且針對微結構母模作抗沾粘處理，探討其成效。

關鍵字

滾壓 ； 矽橡膠 ； 光學薄膜 ； 聚二甲基矽氧烷 ； 模帶

並列摘要

This thesis investigates the development of imprint equipment in transferring micro-structure. By using the material of silicon based rubber, UV-curable polymer resin and the technology of UV-curing process, we can obtain a well transfer micro-structure in a continuous imprint molding process at low-pressure and low-temperature. We also develop a method for making a new type of tape-mold with micro-structure on its surface. Using the injection way, we make the micro-structure directly on the soft-rubber tape and roller, which want to substitute for the traditional hot embossing roller mold. In the Roll to Roll forming technology, we expect to develop an innovative imprinting method to apply in the continuous molding process.
In finding the material to make the micro-structure mold, we discover that PDMS (Type 184) and silicon rubber (Type 921) can duplicate the surface structure in micro-scale perfectly because of the well fluidity before solidification. After making those materials into micro-structure tape-molds, these tape-molds can work smoothly in imprint structure. But during the process of making these elastic-molds, we need to consider the roundness, straightness and surface roughness in the micro-structure roller mold and tape mold, in order to avoid the non-uniformity in imprint process and the incomplete filling with UV-curable resin in some part of imprint area. In this investigation we discuss defects of elastic tape-mold and roller-mold that these defects probably produce during the injection and solidification process and the influence of these defects on the forming products.
In the work of designing imprint machine using tape-mold, we find out that the design of the roller pressure control mechanism and the web tension control system influence the distortion of molding structure and the uniformity of molding products directly. The coating system also needs adjusted, or the non-uniformity of thickness in resin coating will affect the imprint products directly. For various optical film molding in different condition, we probe into the various reasons why defects produce and improvement of these defects. We also discuss the anti-sticking effect, which hope can extend the mold’s imprint times, on the imprint mold of the micro-structure.

並列關鍵字

Roll imprint ； Silicon rubber ； Optical-film ； Polydimethylsiloxane(PDMS) ； Tape

參考文獻

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