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研究生: 莊秉儒
Chuang, Bing-Ru
論文名稱: 氫離子源輔助濺鍍富矽氧化物於記憶體之研究
Research of silicon-rich oxide films prepare by hydrogen ion-source assisted sputtering for memory application
指導教授: 施權峰
Shih, Chuan-Feng
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年: 2013
畢業學年度: 101
語文別: 中文
論文頁數: 106
中文關鍵詞: 富矽氧化物記憶體氫離子源
外文關鍵詞: silicon-rich oxide, memory, hydrogen ion source
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  • 本篇論文中詳述富矽氧化物薄膜於記憶體之應用,富矽氧化物薄膜(Silicon-rich-oxide, SRO)具有高溫退火後能形成矽奈米晶,以及本身具有高密度的矽懸鍵兩個特點,因此可以用於製作儲存電荷用途的MOS電容記憶體之結構。其儲存機制可分為量子侷限效應和缺陷的捕獲載子兩大類。
    離子源功用為加速離子氣體撞擊薄膜表面,或藉由和電漿交互作用影響鍍膜過程,本研究使用氫氣離子源輔助鍍膜,目的在於對矽奈米晶的結晶性和矽氧相關缺陷態做調變,藉由C-V曲線的量測來觀察元件儲存電荷能力的差異性,並輔以高解析穿隧式電子顯微鏡(Transmittance electron microscopy, TEM)、光致螢光(Photoluminescence, PL)、X光光電子能譜(X-ray Photoelectron Spectrometer, XPS)分析來討論加入氫離子源後其結晶性與缺陷態的變化,最後提出一合理的解釋來解釋其現象。

    Application of silicon-rich oxide (SRO) films for memory is discussion in detail. SRO films can be fabricated memory device because of it can form silicon nanocrystal after high temperature annealing and it have high density silicon dangling bond. The mechanism of charging effect are quantum confinement effect and defect state trap carriers.
    Function of the ion source is accelerated ion gas to impact film. Hydrogen ion source can control and modify SRO charging layer property by destroy Si-Si bond and passivation silicon dangling bond. The size of the silicon clusters are controlled and modified by the Hydrogen ions. The hydrogen ion source assisted sputtering phenomenon and mechanism is also thoroughly explained and discussed.

    目錄 摘要 I Abstract II 誌謝 III 圖目錄 VII 表目錄 X 第一章 緒論 1 1-1 前言 1 1-2 研究動機 3 1-3 論文架構 4 第二章 文獻回顧與理論基礎 6 2-1 半導體記憶體簡介 6 2-2 矽MOS電容理論 7 2-2-1 理想MOS電容結構、能帶圖與運作 7 2-2-2 電容-電壓曲線與其應用 10 2-2-3 矽MOS電容氧化層中的各種電荷、缺陷與介面缺陷電荷密度 11 2-2-4 二氧化矽中的各種氧缺陷態 15 2-3 奈米晶記憶體 17 2-3-1 奈米晶記憶體發展文獻回顧 19 2-3-2 電荷儲存效應 (Charging Effect) 23 2-3-3 超晶格結構 (Superlattice Structure) 27 2-4 離子源輔助鍍膜系統 27 2-4-1 離子源 29 2-4-2 橋式電漿中和器 30 2-4-3 離子源輔助鍍膜系統與其應用 31 第三章 實驗步驟與儀器量測 33 3-1 實驗流程 34 3-1-1 矽基板準備與清洗 34 3-1-2 成長熱氧化層 36 3-1-3 薄膜鍍製 37 3-1-4 薄膜後退火 41 3-1-5 金屬電極鍍製 42 3-2 電性量測分析 43 3-2-1 電容-電壓量測(Capacitance-voltage measurement) 43 3-2-2 電流-電壓量測(Current-voltage measurement) 44 3-2-3 電容-時間量測(Capacitance-time measurement) 44 3-3 物性材料分析 44 3-3-1 穿透式電子顯微鏡分析 TEM 44 3-3-2 高解析X光光電子能譜分析XPS 46 3-3-3 光致螢光分析 PL 48 第四章 結果與討論 50 4-1 含有單層富矽氧化物之MOS電容記憶體 50 4-1-1 單層富矽氧化物的MOS電容記憶體C-V曲線特性分析 51 4-1-2 單層富矽氧化物的MOS電容記憶體I-V特性分析 57 4-1-3 單層富矽氧化物的MOS電容記憶體TEM微結構分析 60 4-1-4 結論 63 4-2 多層儲存層結構MOS電容記憶體 63 4-2-1 多層結構的MOS電容記憶體C-V特性分析 64 4-2-2 多層結構的MOS電容記憶體TEM微結構分析 67 4-2-3 多層結構無離子源不同退火條件差異比較 71 4-2-4 結論 72 4-3 加入氫離子源輔助製作多層MOS電容記憶體 73 4-3-1 有無離子源的多層MOS電容記憶體C-V特性比較 74 4-3-2 有氫離子源的多層MOS電容記憶體的TEM微結構比較 84 4-3-3 有無離子源的多層MOS電容記憶體的I-V特性比較 87 4-3-4 有無離子源的多層MOS電容記憶體的retention特性比較 88 4-3-5 高解析X光光電子能譜 (HRXPS)分析 90 4-3-6 光致螢光 (PL)分析 93 4-3-7 氫離子源對SRO/SiO2多層結構MOS電容記憶體的影響與討論 96 4-3-8 結論 100 第五章 結論與未來規劃 101 5-1 總結論 101 5-2 未來規劃 102 參考文獻 103

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