研究生: |
林松香 Lin, Song-Shiang |
---|---|
論文名稱: |
壓克力系感光材料合成及其在平面顯示器之應用研究 Synthesis of Acrylated Base Photosensitive Material for the Applications of Flat Panel Display |
指導教授: |
李育德 教授
Lee, Yu-Der |
口試委員: |
劉大佼
Liu, T.J. 蔡宏斌 詹立行 |
學位類別: |
博士 Doctor |
系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 182 |
中文關鍵詞: | 感光材料 、奈米孔洞 、光配向 、電漿配向 |
外文關鍵詞: | photosensitive, nanoporous, photo aligment, plasma alignment |
相關次數: | 點閱:3 下載:0 |
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第一部分 壓克力系低介電奈米孔洞感光材料之研究
本研究是合成含有tert-butoxycarbonyl(t-BOC) group的壓克力系感光型高分子,並在感光材料組成份中添加光酸產生劑(photo Active generator,PAC),於微影過程中進行UV曝光時,曝光區的光酸產生劑受光子誘發形成質子酸(bronsted acid),並在曝後烤的過程中(加熱110℃~180℃),質子酸與tert-butoxycarbonyl acrylic copolymer發生化學反應,即質子酸催化t-BOC group,產生去保護反應(deprotection),形成壓克力酸高分子及異丁烯(isobutene)。因此,使曝光區較易溶於鹼性溶液,非曝光區因未產生壓克力酸,故較難溶於鹼性溶液,亦即曝光區和非曝光區對於鹼性顯影液溶解度具有差異性而達到圖案轉移目的。而isobutene經加熱逸散在polymer matrix中,冷卻後即可形成奈米孔洞(nanoporous)。本研究旨在探討含t-BOC group之感光型高分子,在光微影過程中奈米微孔洞產生之關鍵因素。
本研究成功合成了四種不同t-BOC含量配方比例的binder,並調製多種不同組成份之感光材料,探討porogene、thermal effect、exposure dosage等因素控制porosity 及 pore size,使達到調整孔洞大小及分佈之目的。
本研究利用TEM及SEM鑑定確認光敏感性材料產生之奈米微孔洞可達30nm以下,並驗證介電常數(dielectric constant)隨著奈米微孔洞增加而降低,目前介電常數可從3.5降低達到2.6以下。
第二部分 壓克力系非接觸式液晶配向感光材料之研究
本研究主要是設計合成dimethacrylate系列的感光性化合物,具有可行光聚合反應的雙鍵官能基,可利於進行光二聚合法的感光性高分子,以利光配向方法的應用。此感光性聚合物之重複單元具有兩種乙烯雙鍵,第一種乙烯雙鍵具有高於第二種乙烯雙鍵之反應性,可進行聚合形成高分子主鏈,第二種乙烯雙鍵可以兩段式紫外線處理形成配向膜。因此,選擇的感光性單體需含二個以上的乙烯雙鍵,可提高光敏感性並降低紫外線曝光量。另外,為了改善dimethacrylate系列高分子預傾角及錨定能偏低之問題而設計合成dimethacrylate fluoropentyl copolymer,並探討氟化含量對液晶預傾角及配向材料對液晶的錨定能之影響。研究結果確認含氟共聚合物配向膜進行光配向後,隨著含氟量增加預傾角亦隨之增加,耐熱性亦佳。同時驗證配向膜之含氟量增加時,配向膜之表面能越低,故液晶分子的預傾角亦應隨之提高。因此藉由設計不同含氟量共聚合物的配向膜,可具有調控液晶配向預傾角之能力。
電漿束(Plasma)的配向較為強力,且配向膜材料不侷限於有感光性基團的材料。本研究利用原子力顯微鏡AFM掃描電漿束配向處理後的表面形態,藉以了解電漿束的配向機制。研究結果顯示plasma未處理的表面形態是無方向性的,加強電漿束掃描則明顯看到具有方向性微溝槽(microgrooves)的表面形態。而此具有方向性的微溝槽就是讓液晶得以有方向性排列的依據。AFM結果顯示PI 材料及dimethacrylate polymer 在plasma處理後均明顯可看到具有方向性微溝槽的表面形態。另外AFM也顯示PI 材料及dimethacrylate polymer 在刷膜 (rubbing) 配向處理後的確也產生微溝槽,只是rubbing微溝槽的均勻性(uniformity)較差,其微溝槽高度的一致性也比較低,而這也是rubbing配向的均勻性與對比都比plasma配向差的原因。
Part 1 Photo-Induced Nano-Porosity of tert-Butoxycarbonyl Acrylic Photosensitive Material with Low Dielectric Constant
We have reported a photosensitive system having low dielectric constant with nanoporous. The photosensitive system is patternable and the nano-porosity is generated through the combination of photo exposure and thermal treatment. Nanoporous were formed in a photosensitive material to reduce its dielectric constant. A tert-butoxycarbonyl (t-BOC) containing acrylic copolymer can be activated as a photosensitive material via photochemical reactions. Iodonium salt as a photo acid generator (PAG) was exposed to ultraviolet light with a wavelength of under 365nm to form the corresponding bronsted acid. The side chains of t-BOC were cleaved by this bronsted acid to yield isobutylene and acrylic acid groups. The small molecules of isobutylene thus formed were further heated in the polymer matrix to generate nanoporous. Notably, the t-BOC content and heat affect the dimensions and number of nanoporous. The dielectric constant decreased as the density of nanoporous increases. The formation of nanoporous was observed by TEM and SEM. Also, the mechanisms of formation of nanoporous and their effects on the dielectric constant were studied. The nanoporous photosensitive material can thus be applied in integrated circuits and the new generation of liquid crystal displays.
Part 2 Non-contact Mode Liquid Crystal Alignment Film of Acrylic Photosensitive Material
We have developed a new photosensitive material, which is applicable for photo-induced alignment layer for liquid crystal display. The synthesis and characterization of bis-methacrylic derivatives of p-aminophenol was explored. We were able to control the molecular weight of the dimethacrylate based photosensitive polymer via free radical polymerization. The polymerization selectivity of the double bonds in homopolymer could be verified with the solid state NMR.
We have also developed a series of fluorinated dimethacrylate copolymers which are applicable for plasma treatment and useful for photo induced liquid crystal alignment layer. Our work covered the synthesized derivatives of alignment materials, characterized properties of the pretilt angle, and uniformity of liquid crystal alignment layer. The surface properties of alignment film and the liquid crystal pretilt angle were tailored by fluorinated dimethacrylate copolymer.
The formation of orientational microgrooves on polymer films via anode layer thruster (ALT) plasma treatment was reported. The surface morphology of the plasma-treated polymer films was examined by using atomic force microscopy (AFM). The results show that the microgrooves are aligned periodically in the scan direction of the plasma beam. The microgrooves become more pronounced as the number of scans increases. The depth of the microgrooves and the azimuthal anchoring energy also increase with the number of the plasma beam scans.
In addition, excellent alignment uniformity has been achieved by using the photo-induced process and the anode layer thruster plasma treatment. We find that the pretilt angle of LC cell by plasma treatment is higher than that of polarized UV treatment. The azimuthal anchoring energy measured is around 10-4 J/M2 by using the plasma treatment. The dimethacrylate-based photosentive polymer can be applied to the photo induced and plasma treated LC alignment layer.
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第十三章 參考文獻
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第十三章 參考文獻
1. 陳嘉明、劉惠玫、林松香、李政道,“光配向技術及其應用” 工業材料,2005/06 p168~173
2. 黃素貞,“液晶顯示器” ,科學發展,2002年1月,349期,p30∼37。
3. 李政道,“彩色液晶顯示器的配向技術與材料進展”,工業材料,150, 1999, p115~124
4. 竹內安正,“液晶光配向技術的與材料最新進展”,機能材料(日),1998,V18(11),p21.
5. 內田龍男,“刷磨技術與配向評估”,液晶學會演講錄(日),1998, V10,1.
6. Y. Makita, T. Natsu, S. Kimura, S. Nakata, M. Kimura, Y. Matsuki, and S. Takahra, J. “Photo Alignment Materials with High Sensitivity to Near UV Light”, Photopoly. Sci. Technol. 11, 187, 1998
7. J. Sto1 hr, M. G. Samant, A. Cossy-Favre, J. Dı´az, Y. Momoi, S. Odahara, and T. Nagata, “Microscopic Origin of Liquid Crystal Alignment on Rubbed Polymer Surfaces”, Macromolecules 1998, 31, 1942-1946
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9. M. Schadt, K. Schmitt, V. Kozinkov and V. Chigrinov, Surface-Induced Parallel Alignment of Liquid Crystals by Linearly Polymerized Photopolymers”,Jpn. J. Appl. Phys., 31, 2155, 1992.,
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11. Alexey Bobrovsky, Natalia Boiko, Valery Shibaev, Joachim Stumpe, J. Photochemistry and Photobiology A: Chemistry, 163, 347, 2004
12. Jeoung-Yeon Hwang, Dae-Shik Seo, Jong-Ho Son, Dong Hack Shu, Jpn. J. Appl. Phys. Vol.40, L761, 2001
13. O. Yaroshchuk, L. G. Cada, M. Sonpatki, L.-C. Chien, Applied Physics Letters, Vol.79(1), 30, 2001
14. Devanand Shenoy, Leonid Beresnev, David Holt, Ranganathan Shashidhar, Applied Physics Letters, Vol.80(9), 1538, 2002
15. Denis Andrienko, Yuri Kurioz, Yuri RReznikov, Charles Rosenblatt, Rolfe Petschek, Oleg Lavrentovich, Darius Subacius, J. Appl. Phys. 83(1), 50, 1998
16. Adam E. A. Contoret, Simon R. Farrar, Peregrine O. Jackson, Sultan M. Khan, Louise May, Mary O’Neill, J. Edward Nicholls, Stephen M. Kelly, Gary J. Richards, Adv. Mater. 12(13), 971, 2000
17. I. Drevens ek Olenik, M. W. Kim, A. Rastegar, Th. Rasing, Appl. Phys. B, “Probing of photo-induced alignment in poly(vinyl cinnamate) films by surface second harmonic generation
18. Jiyu Fang, Craig Whitaker, Brian Weslowski, Mu-Sen Chen, Jawad Naciri, Ranganathan Shashidhar, Journal of Materials Chemistry,, 11, 2992, 2001
19. E. Hoffmann, H. Klausmann, E. Ginter, P. M. Knoll, “Development of a Dualdomain TFT-LCD by Optical Patterning” Proc. SID98, 734 - 727 (1998). 146
20. Martin Schadt, Hubert Seiberle, ROLIC, “Optical Patterning of Multidomain Liquid Crystal Displays with wide viewing angles” Nature 381,p 212 – 215,16 May, 1996
21. 吳仲文,“離子束配向技術” 工業材料, 2004,08
22. J. P. Doyle et al., “Ion beam alignment for liquid crystal display fabrication”, Nucl. Instr. And Meth. In Phys. Res., 2003, 206, p. 467
23. H. Mada et al., “A Proposal on and Verification of Surface Alignment of Liquid Crystal Aligned by Frictional Rubbing”, Jpn. J. Appl. Phys, 1993, 32, p L1245
24. M. F. Toney, T. P. Russell, J. A. Logan, H. Kikuchi, J. Sands, S. K. Kumar, “Near-surface alignment of polymers in rubbed films”, Nature, 1995, 374, p 709
25. St□hr J, Samant MG, L□ning J, et al., “Liquid crystal alignment on carbonaceous surfaces with orientational order”. Science, 292, p 2299, 2001
26. B. F. MacDonal, W. Zheng, R.J. Cole, et al., “RAS -- a New Process Control Tool in Liquid Crystal Device Fabrication”, J. Phys.D: Appl. Phys. Vol 35, L41, 2002
27. John L. West, Linli Su, Kateryna Artyushkova, Jabari Farrar, Julia E. Fulghum, “Study of Ion Beam Alignment of Liquid Crystals on Polymer Substrate”, SID 02 Digest, 48, p1102-1105, 2002
28. A. Lien et al., “Development of a New LC Alignment Technology Using Ion Beam Treated Diamond Like Carbon Film”, 2003
29. S. C. A. Lien, P. Chaudhari, J. A. Lacey, R. A. John, and J. L. Speidell, “Active-matrix display using ion-beam-processed polyimide film for liquid crystal alignment” IBM J. of Research and Development, 42, p 537, 1998
30. Oleg Yaroshchuk, Ruslan Kravchuk, Andriy Dobrovolskyy, Liou Qiu and Oleg D. Lavrentovich., “Two Modes of LC Parallel Alignment on the Plasma. Treated Substrates”, SID 03 DIGEST 1062, 2003
31. Oleg. Yaroshchuk, R. Kravchuk, A. Dobrovolskyy, L. Qiu, O. Lavrentovich, “Planar and tilted uniform alignment of liquid crystals by plasma-treated substrates”. Liq.Cryst., 31, No6, 859-869 (2004)
32. Callegari, Alessandro Cesare et al. “Dry processing for liquid-crystal displays using low energy ion bombardment”, US Patent 6,020,946 ,2000
33. P. Chaudhari, J. Lacey, J. Doyle, E. Galligan, S.A. Lien et.al., “Atomic-beam alignment of inorganic materials for liquid-crystal displays”, Nature, 411, 56, 2001
34. Y. Kato, Y. Nakagawa, Y. Saitoh, S. Odahara, M. Hasegawa, P. Chaudhari et al., “Hydrogenated amorphous carbon films used as an alignment layer for liquid crystal displays”, Eurodisplay, p525- 529, 2002
35. J. Stohr, M. G. Samant, J. Luning, A. C. Callegari, P. Chaudhari, J. P. Doyle, J. A. Lacey, S. A. Lien, S. Purushothaman, J. L. Speidell, “Liquid Crystal Alignment on Carbonaceous Surfaces with Orientational Order”, Science, Vol.292, 2299, 2001
36. O.V. Yaroshchuk, R.M. Kravchuk, A.M. Dobrovolskyy, P.C. Liu, C.D. Lee, Plasma beam alignment for the large area substrates: equipment and process. J. Soc. Inf. Display, 13 (4), 289-294, 2005
37. Lee, Seung Woo; Kim, Sang Il; Lee, Byeongdu; Choi, Wooyoung; Chae, Boknam; Kim, Seung Bin; Ree, Moonhor, “Photoreactions and Photoinduced Molecular Orientations of Films of a Photoreactive Polyimide and Their Alignment of Liquid Crystals”, Macromolecules, Vol.36, 6527, 2003
38. Noritaka Matsuie, Yukio Ouchi, Hiroshi Oji, Eisuke Ito, Hisao Ishii, Kazuhiko Seki, Masaki Hasegawa, Michael Zharnikov, “UV-Photoinduced Surface Anisotropy of Polyimide Studied by Near-Edge X-Ray Absorption Fine Structure Spectroscopy”, Jpn. J. Appl. Phys. Vol.42, L67, 2003
39. Soon Joon Rho., Day-kyu Lee, Hong Koo Baik, Jeoung-yeon Hwang, Yong-min Jo, Dae-shik Seo, “Investigation of the alignment phenomena using a-C:H thin films for liquid crystal alignment materials” ,Thin Solid Films, vol.420-421, p259, 2002
40. Ji-Hyuk Choi; Moon-Ho Ham; Byeong-Yun Oh; Jeoung-Yeon Hwang; Sung-Ho Choi; Dae-Shik Seo; Jae-Min Myoung, “Effects of plasma treatments on correlation between chemical structures of DLC films and liquid crystal alignment”, Liquid CrystalsVolume 33, Issue 8 , P 947, 2006
41. Hsin-Ying Wu and Ru-Pin Pan, "Comparison of Polar Anchoring Strength between the Ion-Beam Bombarded and Rubbed Polyimide Films with a Modified High-Electric-Field Technique" , Annual Meeting of ROC Taiwan Liquid Crystal Society, Hsinchu, Taiwan, p 98-101, 12, 2005
42. 趙如蘋, "液晶表面定向強度及量測" , 電子與材料季刊,第28期,11月,2005
43. 邱華鈺,液晶光配向膜之研究,交大電子物理所碩士論文, 2000
44. 張忠益,紫外光照射光配向膜之方法及性質研究,交大電子物理所碩士論文, 2002
45. 呂欣穎,溝槽配向定向強度對溫度變化之關係,交大電子物 第十三章 參考文獻
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12. Jeoung-Yeon Hwang, Dae-Shik Seo, Jong-Ho Son, Dong Hack Shu, Jpn. J. Appl. Phys. Vol.40, L761, 2001
13. O. Yaroshchuk, L. G. Cada, M. Sonpatki, L.-C. Chien, Applied Physics Letters, Vol.79(1), 30, 2001
14. Devanand Shenoy, Leonid Beresnev, David Holt, Ranganathan Shashidhar, Applied Physics Letters, Vol.80(9), 1538, 2002
15. Denis Andrienko, Yuri Kurioz, Yuri RReznikov, Charles Rosenblatt, Rolfe Petschek, Oleg Lavrentovich, Darius Subacius, J. Appl. Phys. 83(1), 50, 1998
16. Adam E. A. Contoret, Simon R. Farrar, Peregrine O. Jackson, Sultan M. Khan, Louise May, Mary O’Neill, J. Edward Nicholls, Stephen M. Kelly, Gary J. Richards, Adv. Mater. 12(13), 971, 2000
17. I. Drevens ek Olenik, M. W. Kim, A. Rastegar, Th. Rasing, Appl. Phys. B, “Probing of photo-induced alignment in poly(vinyl cinnamate) films by surface second harmonic generation
18. Jiyu Fang, Craig Whitaker, Brian Weslowski, Mu-Sen Chen, Jawad Naciri, Ranganathan Shashidhar, Journal of Materials Chemistry,, 11, 2992, 2001
19. E. Hoffmann, H. Klausmann, E. Ginter, P. M. Knoll, “Development of a Dualdomain TFT-LCD by Optical Patterning” Proc. SID98, 734 - 727 (1998). 146
20. Martin Schadt, Hubert Seiberle, ROLIC, “Optical Patterning of Multidomain Liquid Crystal Displays with wide viewing angles” Nature 381,p 212 – 215,16 May, 1996
21. 吳仲文,“離子束配向技術” 工業材料, 2004,08
22. J. P. Doyle et al., “Ion beam alignment for liquid crystal display fabrication”, Nucl. Instr. And Meth. In Phys. Res., 2003, 206, p. 467
23. H. Mada et al., “A Proposal on and Verification of Surface Alignment of Liquid Crystal Aligned by Frictional Rubbing”, Jpn. J. Appl. Phys, 1993, 32, p L1245
24. M. F. Toney, T. P. Russell, J. A. Logan, H. Kikuchi, J. Sands, S. K. Kumar, “Near-surface alignment of polymers in rubbed films”, Nature, 1995, 374, p 709
25. St□hr J, Samant MG, L□ning J, et al., “Liquid crystal alignment on carbonaceous surfaces with orientational order”. Science, 292, p 2299, 2001
26. B. F. MacDonal, W. Zheng, R.J. Cole, et al., “RAS -- a New Process Control Tool in Liquid Crystal Device Fabrication”, J. Phys.D: Appl. Phys. Vol 35, L41, 2002
27. John L. West, Linli Su, Kateryna Artyushkova, Jabari Farrar, Julia E. Fulghum, “Study of Ion Beam Alignment of Liquid Crystals on Polymer Substrate”, SID 02 Digest, 48, p1102-1105, 2002
28. A. Lien et al., “Development of a New LC Alignment Technology Using Ion Beam Treated Diamond Like Carbon Film”, 2003
29. S. C. A. Lien, P. Chaudhari, J. A. Lacey, R. A. John, and J. L. Speidell, “Active-matrix display using ion-beam-processed polyimide film for liquid crystal alignment” IBM J. of Research and Development, 42, p 537, 1998
30. Oleg Yaroshchuk, Ruslan Kravchuk, Andriy Dobrovolskyy, Liou Qiu and Oleg D. Lavrentovich., “Two Modes of LC Parallel Alignment on the Plasma. Treated Substrates”, SID 03 DIGEST 1062, 2003
31. Oleg. Yaroshchuk, R. Kravchuk, A. Dobrovolskyy, L. Qiu, O. Lavrentovich, “Planar and tilted uniform alignment of liquid crystals by plasma-treated substrates”. Liq.Cryst., 31, No6, 859-869 (2004)
32. Callegari, Alessandro Cesare et al. “Dry processing for liquid-crystal displays using low energy ion bombardment”, US Patent 6,020,946 ,2000
33. P. Chaudhari, J. Lacey, J. Doyle, E. Galligan, S.A. Lien et.al., “Atomic-beam alignment of inorganic materials for liquid-crystal displays”, Nature, 411, 56, 2001
34. Y. Kato, Y. Nakagawa, Y. Saitoh, S. Odahara, M. Hasegawa, P. Chaudhari et al., “Hydrogenated amorphous carbon films used as an alignment layer for liquid crystal displays”, Eurodisplay, p525- 529, 2002
35. J. Stohr, M. G. Samant, J. Luning, A. C. Callegari, P. Chaudhari, J. P. Doyle, J. A. Lacey, S. A. Lien, S. Purushothaman, J. L. Speidell, “Liquid Crystal Alignment on Carbonaceous Surfaces with Orientational Order”, Science, Vol.292, 2299, 2001
36. O.V. Yaroshchuk, R.M. Kravchuk, A.M. Dobrovolskyy, P.C. Liu, C.D. Lee, Plasma beam alignment for the large area substrates: equipment and process. J. Soc. Inf. Display, 13 (4), 289-294, 2005
37. Lee, Seung Woo; Kim, Sang Il; Lee, Byeongdu; Choi, Wooyoung; Chae, Boknam; Kim, Seung Bin; Ree, Moonhor, “Photoreactions and Photoinduced Molecular Orientations of Films of a Photoreactive Polyimide and Their Alignment of Liquid Crystals”, Macromolecules, Vol.36, 6527, 2003
38. Noritaka Matsuie, Yukio Ouchi, Hiroshi Oji, Eisuke Ito, Hisao Ishii, Kazuhiko Seki, Masaki Hasegawa, Michael Zharnikov, “UV-Photoinduced Surface Anisotropy of Polyimide Studied by Near-Edge X-Ray Absorption Fine Structure Spectroscopy”, Jpn. J. Appl. Phys. Vol.42, L67, 2003
39. Soon Joon Rho., Day-kyu Lee, Hong Koo Baik, Jeoung-yeon Hwang, Yong-min Jo, Dae-shik Seo, “Investigation of the alignment phenomena using a-C:H thin films for liquid crystal alignment materials” ,Thin Solid Films, vol.420-421, p259, 2002
40. Ji-Hyuk Choi; Moon-Ho Ham; Byeong-Yun Oh; Jeoung-Yeon Hwang; Sung-Ho Choi; Dae-Shik Seo; Jae-Min Myoung, “Effects of plasma treatments on correlation between chemical structures of DLC films and liquid crystal alignment”, Liquid CrystalsVolume 33, Issue 8 , P 947, 2006
41. Hsin-Ying Wu and Ru-Pin Pan, "Comparison of Polar Anchoring Strength between the Ion-Beam Bombarded and Rubbed Polyimide Films with a Modified High-Electric-Field Technique" , Annual Meeting of ROC Taiwan Liquid Crystal Society, Hsinchu, Taiwan, p 98-101, 12, 2005
42. 趙如蘋, "液晶表面定向強度及量測" , 電子與材料季刊,第28期,11月,2005
43. 邱華鈺,液晶光配向膜之研究,交大電子物理所碩士論文, 2000
44. 張忠益,紫外光照射光配向膜之方法及性質研究,交大電子物理所碩士論文, 2002
45. 呂欣穎,溝槽配向定向強度對溫度變化之關係,交大電子物理所碩士論文, 2004
理所碩士論文, 2004