研究生: |
鄭瑞娥 Jui-O Cheng |
---|---|
論文名稱: |
有機-無機界面整合功能及光電應用之研究 Studies on the integrated functions in organic-inorganic interface and their optical- electric applications |
指導教授: |
邱顯堂
Hsien-Tang Chiu |
口試委員: |
邱文英
Wen-Yen Chiu 陳登科 Teng-Ko Chen 張豐志 Feng-Chih Chang 吳震裕 J. Y. Wu 李俊毅 Jiunn-Yi Lee 馬振基 Chen-Chi M. Ma 邱士軒 Shih-Hsuan Chiu 蕭耀貴 Yao-Kuei Hsiao |
學位類別: |
博士 Doctor |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 147 |
中文關鍵詞: | 聚口比咯 、化成鋁箔 、固態電容器 、聚醯亞胺 、熱醯亞胺化 、配向膜 、向列型液晶 、刷磨配向 、複折射光學紋理 、光電效應 |
外文關鍵詞: | Polypyrrole(PPy), Polyimide(PI), Thermal Imidization, Alignment layer, Rubbing, Electro-Optic effect |
相關次數: | 點閱:710 下載:7 |
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本研究針對有機-無機-界面混成整合機能之固態晶片型電容器之材料製程及元件特性加以探討,即著眼於Al2O3與導電性聚口比咯界面整合加工技術及電容特性深入解析。 另一方面,對於LCD Modules中之ITO glass/PI之有機-無機界面整合,經由聚醯亞胺(Polyimides)之合成及其thermal imidization process之探討,及應用於 ITO玻璃基板之聚醯亞胺配向膜(alignment film)的各項加工參數對LCD光電特性之影響效應進行分析。
在Al2O3與導電性聚口比咯界面整合加工技術及電容特性研究議題上,以原子力顯微鏡(AFM)分析化成鋁箔之表面組織結構,並以SEM及EDS觀察解析聚口比咯在化成鋁箔上之分佈狀態,再經由導電係數、串聯電容、電阻抗值及損失因子等電性能之評估,建立具有最佳串聯電容特性之化成鋁箔表面結構參數。
經由AFM、SEM、EDS與電性能之分析結果可知,13V化成鋁箔之表面凹凸結構比較緻密、微孔洞結構多,有利於增大比表面積,口比咯進入兩種鋁箔的相對量,13V比8V來的多。在各項電子性能評估顯示,13V化成箔有較好的電容特性。
在聚醯亞胺(Polyimides)之合成及其thermal imidization process之探討方面,結合熱重量損失分析(TGA)、剛性擺錘流變儀(RPR)及傅立葉轉移紅外線光譜儀(FT-IR)等分析,對於由同一種二酸酐分別與四種二胺合成的聚醯胺酸溶液(Precursor Polyamic acid;PAA)轉化成PI系統之熱醯亞胺化程序進行分析,提供對於新的PI系統,觀察其醯化行為、反應溫度區間、反應時間、轉化率測定及醯化後PI的熱性質使用範圍(Tg, Td)的新方法。
TGA結果觀察,用相同二酐組合不同的二胺所合成的PAA-PI系統,有其各別的反應溫度區間及反應速度。 分子主鏈結構中的拉、推電子基團效應及分子鏈的剛柔性影響醯亞胺化反應。在RPR測試結果可觀察到,在各個等溫溫度下醯亞胺化整體反應皆約於20min內即達平衡,而完成該等溫溫度的階段反應。隨著PAA環化成PI的醯亞胺化程度增高,反應平衡damping高度與Tg越高,亦即分子鏈剛硬度影響最後的反應平衡damping 高度與Tg。
於 ITO玻璃基板之聚醯亞胺配向膜(alignment film)的各項加工參數對LCD光電特性之影響效應研究方面,由於Liquid crystal displays(LCDs)之各種光電顯示特性,深受液晶材料及配向膜材料種類、配向膜成形條件、界面處理方式及液晶基板配向組合方向…等參數所影響。故此研究利用DSC、TGA、Moisture Analyzer、AFM及SEM等分析,可快速、簡易檢視液晶與配向膜等應用材料之本身特性,提供的適當製程條件選擇。 另外,藉由接觸式的布輪絨毛布的單方向性機械刷磨(rubbing)配向技術,進行液晶及配向膜間之界面處理。預傾角隨配向布壓入量的增加而增加,而不同的配向方向亦對預傾角的情況產生影響。採用P型向列型液晶Merck MJ99159並搭配Polyimide配向液JSR-AL 21000,經所設定的製程條件組成LC cells,在curing、rubbing及配向組合方向等加工參數影響下,探討LC cells樣品所呈現各種不同的光電效應表現。
The objectives of this study are to investigate the materials process and component characters of solid state chip capacitors with the integrated functions in organic-inorganic interface. The capacitance features and the interface process technique between Al2O3 and polypyrrole were analyzed in depth. In addition, for the organic-inorganic interface integration between ITO glass and PI in LCD modules, those analyses including the polyimides synthesis and its thermal imidization behavior and the electro-optic effect in LCD affected by the various processing parameters of polyimides coated upon ITO glass substrate were studied in detail.
In this study of the capacitance features and the interface integrated process technique between Al2O3 and polypyrrole, Atomic force microscope (AFM) was applied to analyze the surface structure of the chemically synthesized aluminum foil. The topography and distribution of polypyrrole on the surface of the foil were observed and analyzed through scanning electron microscope (SEM) and Energy Dispersive X-ray Spectrometer (EDS). At last, the evaluation of electric performances such as conductivity, series capacitance, impedance and dissipation factor(DF)were conducted so as to establish the parameters for the surface structure of the chemically synthesized foil with the best series capacitance features.
The result of the combined use of AFM, SEM/EDS and RPR showed the 13V of aluminum foil have more micro-pores structure, higher surface area and much polypyrrol entering inside foil than the 8V type of aluminum foil. And as a result, 13V type of aluminum foil exhibited better capacitance features than 8V type of aluminum foil under various electric performance evaluations.
In this study of the polyimides synthesis and their thermal imidization behavior, four types of precursors polyamic acid (PAA) were synthesized, meanwhile, thermal gravity analysis(TGA), rigid body pendulum rheometer experiment(RPR), and Fourier transform infrared(FT-IR)spectroscopy were combined to analyze the thermal imidization processes from precursors PAA to polyimides(PIs). This procedure provides the new PAA-PI system with new methods for observing the imidization behavior, thermal properties and finding the optimization of processing conditions.
The results of the TGA and FTIR imidization conversion analysis revealed that the PAA-PI systems synthesized with identical dianhyride and different diamines have distinct reaction temperature regions and reaction rate. The inductive effect of withdrawing and releasing group and the rigidity-flexibility of the molecular chain in the structure of molecular backbone chain influence the imidization reaction.
We have seen from the RPR test results that the entire imidization reaction in every isothermal testing temperature reaches an equilibrium condition and completes the gradation reaction of each isothermal temperature within 20 minutes. Glass transition temperatures (Tg) of PIs increase with increasing the conversion rate from PAA into PI and the rigidity of molecular chain.
In this study of the electro-optics effect in LCD affected by the various processing parameters of polyimides coated upon ITO glass substrate, since The electro-optics characteristics of display in a LCD are deeply affected by those parameters including the kinds of liquid crystals and alignment layer materials, the forming conditions of alignment layer, the substrates alignment mode and the processing conditions of rubbing alignment in the interface treatment, etc., these analyses of differential scanning calorimeter (DSC), thermal gravity analysis (TGA) and moisture analyzer are utilized to examine the properties in liquid crystals and PI alignment layer materials. The interface treatment between liquid crystals and PI alignment layers were executed via the alignment technology of unidirectional mechanical rubbing with a rayon velvet cloth. In the rubbing treatment with a rayon velvet cloth, the pretilt angle of LC molecules increases along with increasing the pile impression. Moreover, the different alignment modes also affect the pretilt angle of liquid crystal.
Those LC cell specimens were fabricated using Merck MJ99159 NP liquid crystal and PI alignment layer material (JSR-AL 21000) with various process conditions. Under those parameters influence of curing, rubbing and alignment direction, cell specimens display various electro-optics effects.
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