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研究生: 劉家瑜
Chia-Yu, Liu
論文名稱: 軟性及剛體基板之元件應力分析及模型設計
Stress Distribution and Model Design of the Devices on Flexible and Rigid Substrate
指導教授: 李敏鴻
Lee, Min-Hung
李昌駿
Lee, Chang-Chun
學位類別: 碩士
Master
系所名稱: 光電工程研究所
Graduate Institute of Electro-Optical Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 66
中文關鍵詞: 應力分析
論文種類: 學術論文
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  • 現今科技技術蓬勃發展、面板產業技術越趨成熟下,在大量製造競爭中我們開始要考慮到成本降低,才能在供給需求中達成平衡。再作製程之前一定會有樣本先去做測試,如何設計出一個好樣本讓我們去做測試,就端賴我們TCAD模擬去設計。顯示器發展已著重可攜帶性、輕巧等特性,要配合可以攜帶性就必需考慮到如何收納,有可能撓曲成一個圓筒收藏,這樣撓曲勢必產生應力對電性跟元件造成影響。本論文中所使用的TCAD軟體是專門模擬應力分析方面的,從建立模型、代入材料參數、設定內部應力(intrinsic stress)、施加邊界條件,一步步設定完成就可以達到我們想了解的應力值跟應變值,這對於我們了解元件真正發生應力集中及改善幫助不少。不僅如此,我們也可以改動裡面材料參數,馬上就可以模擬新特性的IC元件。
    在本論文中,我們嘗試對許多不同類型的材料去做撓曲,像是
    上閘極或是下閘極的非晶矽薄膜元件、太陽能電池,甚至鈦鋁夾層基板我們還模擬當它破裂時,所釋放出來的破裂能(Energy release rate)。仿照論文的驗證跟修改,我們期望這些數據能夠對於學術上應力分析能有所貢獻。

    The cost down is a critical issue for display industry and high density IC development. Before the product design, the TCAD simulation plays an important role to reduce R&D cycles and budget. For flexible display development, the characteristics are portable, lightweight, rugged, arbitrary sharpness, and unrestrained design. However, the electrical characteristics of TFTs may be degraded with mechanical bending, and leaded the panel failure. This paper used in TCAD software is specialized simulation of stress analysis from model building, incorporated into the material parameters, set intrinsic stress, imposed boundary conditions. Step by step, setup is completed that you can reach our want to know the stress and strain. It would help us to understand that the component of the stress concentration and improve IC model design a lot. Not only that, we can also change the material parameters, we can immediately simulate new features of IC components.
    In this paper, we try to do many different types of materials and bending on the different curvature, such as Top gate or bottom gate a-Si devices, solar cells, titanium or aluminum sandwich board. We also simulated the breakdown of the released energy (Energy release rate) when it broke down. Verifying and changing the model from paper, we expect this data that can contribute to stress analysis for the academic research.

    Publication List I 中文摘要 II 英文摘要 III 致謝 V 目錄 VII 圖目錄 X 表目錄 XV 第一章 緒論 1-1.軟性顯示器之應力撓曲分析動機 1 1-2.有限元素法的概念及TCAD的應用 2 第二章 軟性顯示器(Flexible Display)的撓曲TCAD模擬試驗 2-1.前言 5 2-2.模組的建立與驗證 6 2-3.曲率的驗證與撓曲 10 2-3-1.使用公式施加邊界條件 10 2-3-2.使用equation去設定邊界條件 15 2-4. intrinsic stress的代入 22 2-5.參數化 24 2-6.元件延伸的比較 25 2-7. 結構應力分析 26 2-7-1.Bottom gate α-Si:H TFT 26 2-7-1-1.曲率的改變 27 2-7-1-2.Overlap的改變 29 2-7-1-3.gate length (Lg)的改變 31 2-7-1-4.最佳化 32 2-7-2.Top gate μc-Si:H TFT 33 第三章 異質接面矽基高效能太陽能電池(HIT)之TCAD模擬測試 3-1.前言 36 3-2. HIT TCAD應力模擬分析 37 3-3. HIT電性模擬 40 3-4.結論 44 第四章 鈦鋁夾層薄膜基板作4-PT(4 point bend delaminating test)撓曲破裂實驗的TCAD模擬 4-1.前言 46 4-2.機台與樣品簡圖 47 4-3.4點彎曲破裂試驗之TCAD模擬 49 4.3.Energy release rate原理推導與計算 52 4.4.結構改變設計 58 第五章 結論與未來待續研究 5-1.各章總結 61 5-2.未來工作 62 參考文獻 64

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