| 研究生: |
李柏毅 Lee, Po-I |
|---|---|
| 論文名稱: |
正型鹼性水溶液顯影感光性聚亞醯胺材料之研究 Positive-working Aqueous Base Developable Photosensitive Polyimides |
| 指導教授: |
許聯崇
Hsu, Lien-Chung Steve |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 材料科學及工程學系 Department of Materials Science and Engineering |
| 論文出版年: | 2002 |
| 畢業學年度: | 90 |
| 語文別: | 中文 |
| 論文頁數: | 100 |
| 中文關鍵詞: | 感光性聚亞醯胺 |
| 外文關鍵詞: | photosensitive polyimide |
| 相關次數: | 點閱:58 下載:3 |
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摘 要
經由分子設計,我們利用2,2’-Bis-(3-amino-4-hydroxyphenyl) hexafluoropropane (BisAPAF) 單體和pyromellitic dianhydride (PMDA) 或4,4-Oxydiphthalic anhydride(ODPA)及正丁醇的反應物合成可溶解於鹼性水溶液的聚醯胺脂(polyamic ester)。由於此樹脂帶有phenolic hydroxyl groups,所以可由添加diazonaphthoquinone (DNQ)感光劑來抑制其溶解度,以製成正型鹼性水溶顯影的感光性聚亞醯胺(photosensitive polyimide , PSPI)。
Polyamic ester樹脂可以由chlorination方法或direct polymerization方法合成。利用direct polymerization方法,我們可以得到固有黏度(inherent viscosity)為0.23 dL/g 的聚合物,其結構已由FTIR及 1H-NMR光譜得到證明。利用該聚合物和2,3,4-tris(1-oxo-2- diazonaphthoquinone-5-sulfonyloxy)-benzophenone (PIC-3) 感光劑所製成的感光性樹脂配方。使用濃度為1.25 wt % 的tetramethyl- ammonium hydroxide (TMAH) 顯影液,在微影成像實驗中,可以得到解析度為10 μm 的line/space圖案。從其3μm厚薄膜的曝光特性曲線可看出它的對比值為1.65及光敏感度為150 mJ/cm2。
為降低該樹脂的未曝光膜損失(dark film loss) 及增加曝光前後溶解度的差異,我們也合成由DNQ capped的BisAPAF-PMDA-n-butyl polyamic ester與BisAPAF-ODPA-n-butyl polyamic ester。利用相同的配方及微影成像條件,我們可以得到解析度為5μm的line/ space圖案,而且其dark film loss也從22% 減少到6% 。從其3μm厚的薄膜曝光特性曲線可看出BisAPAF-PMDA-n-butyl polyamic ester感光配方的對比值為1.68及光敏感度為176mJ/cm2而BisAPAF-ODPA- n-butyl polyamic ester的對比為1.02,光敏感度為185mJ/cm2。
Abstract
Positive working aqueous base developable photosensitive polyimide precursors based on polyamic esters bearing phenolic hydroxyl groups and diazonaphthoquinone (DNQ) photosensitive compounds have been developed. The polyamic esters were prepared from a direct polymerization of 2,2’-bis-(3-amino-4-hydroxyphenyl) hexafluoro propane (BisAPAF) and bis(n-butyl) ester of pyromellitic dianhydride (PMDA) or 4,4-Oxydiphthalic anhydride(ODPA)in the presence of phenylphosphonic dichloride as an activator. The inherent viscosity of the precursor polymer was 0.23 dL/g. The structures of the precursor polymer and the fully cyclized polymer were characterized by FTIR and 1H-NMR. The photosensitive polyimide precursor from the uncapped polyamic ester containing 25phr(parts per hundred resin) PIC-3 showed a sensitivity of 150 mJ/cm2 and a contrast of 1.65 in a 3μm film with a 1.25 wt % tetramethylammonium hydroxide (TMAH) developer. A pattern with a resolution of 10μm was obtained from this composition. In order to improve the dark film loss, the polyamic esters were capped with DNQ. The photosensitive polyimide precursor from 25% DNQ capped BisAPAF-PMDA-n-butyl polyamic ester containing 25phr PIC-3 showed a sensitivity of 176 mJ/cm2 and a contrast of 1.68 in a 3μm film under the same lithographic conditions. The 25% DNQ capped BisAPAF-ODPA- n-butyl polyamic ester containing 25phr PIC-3 showed a sensitivity of 185 mJ/cm2 and a contrast of 1.02. Both of DNQ capped polyamic esters gave a pattern with a resolution of 5μm and had a much less dark film loss.
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