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研究生: 鍾維修
Chung, Wei-Xiu
論文名稱: 以原子層化學氣相沉積法鍍製氧化鑭、二氧化鉿及鑭-鉿氧化物之製程及材料性質
Process and Material Properties of La2O3、HfO2 and La-Hf-O Prepared by Atomic Layer Deposition
指導教授: 吳泰伯
Wu, Tai-Bor
口試委員:
學位類別: 碩士
Master
系所名稱: 工學院 - 材料科學工程學系
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: 97
中文關鍵詞: 原子層化學氣相沉積法氧化鑭二氧化鉿鑭-鉿氧化物
外文關鍵詞: ALCVD, La2O3, HfO2, LHO, XPS
相關次數: 點閱:3下載:0
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  • 本實驗以原子層化學氣相沉積法 (Atomic layer chemical vapor deposition , ALCVD )鍍製La2O3、HfO2,以及二種不同結構之La-Hf-O薄膜,ALCVD可在低溫成長、具有優良之膜厚控制能力以及階梯覆蓋性,為鍍製超薄薄膜的理想方式。鍍製時採用La(iPr2-FMD)3做為鑭的前趨物,TEMAH (Hf(NC3H8)4)做為鉿的前趨物,二者皆以氧氣電漿做為氧化劑進行反應。

    本實驗第一部分將探討La2O3、HfO2薄膜之材料性質,包含薄膜均勻性、XPS、GIXRD、AES、TEM等材料分析,以及製作成MIS電容結構(Metal – Insulator – Semiconductor )量測此電容在不同熱處理溫度之電性曲線。

    第二部分La-Hf-O三元氧化物之性質研究,鍍製二種不同結構之La-Hf-O薄膜:La2O3/HfO2 (Stack)、LaHfOx (Alloy),其中La2O3、HfO2的鍍製cycle數比均為1:1,進行材料分析以及電性量測, 探討熱處理溫度對材料性質的影響。


    致謝 I 摘要 II 目錄 III 圖目錄 VI 表目錄 IX 第一章 緒論 1 1-1前言 1 1-2 研究動機 3 1-3 研究目標[ 7 ]-[ 28 ] 7 第二章 文獻回顧 9 2-1 high-κ材料 9 2-2 high-κ薄膜沉積方式 12 2.2.1 物理氣相蒸鍍法 13 2.2.2 化學氣相沉積法 14 2.2.3 液相化學鍍製法 16 2.3 原子層化學氣相沉積法(ALCVD) 16 2-4 ALCVD技術的優缺點[31 ]-[ 33 ] 19 2-5 ALCVD前趨物的選擇[ 9 ]-[ 24] 21 2-6 介電常數[ 34 ] 25 第三章 實驗步驟 29 3.1 基板準備 29 3.2 High-κ薄膜鍍製 29 3.3 介電薄膜Post deposition annealing熱處理 36 3.4上電極鍍製、黃光微影、蝕刻、背電極製作 36 3.5分析與量測 36 3.5.1 X-ray photoelectron spectroscopy(XPS) 37 3.5.2 Transmission electron microscopy(TEM) 37 3.5.3 Auger Electron Spectroscopy (AES) 37 3.5.4 Electrical properties measurement 38 第四章 結果與討論 I 40 4-1 以水為氧化劑,鍍製氧化鑭薄膜製程之最佳化 40 4-2 以氧氣電漿鍍製氧化鉿薄膜製程之最佳化 45 4-3 氧化鉿薄膜材料性質分析 51 4-3-1 低掠角X光繞射(GIXRD)薄膜結晶分析 52 4-4 氧化鉿薄膜材料電性分析 53 第五章 結果與討論 II 62 5-1 La-Hf-O三元氧化物 62 5-2 La-Hf-O薄膜材料性質分析 62 5-2-1 X光光電子能譜儀 62 5-2-2 低掠角X光繞射 (GIXRD)薄膜結晶分析 63 5-2-3 穿隧式電子顯微鏡 (TEM) 64 5-2-4 歐傑電子能譜儀 (AES) 67 5-3 La-Hf-O薄膜材料電性分析 70 5-3-1 La-Hf-O薄膜在熱處理溫度500度時電性分析 70 5-3-2 La-Hf-O薄膜在不同熱處理溫度電性分析 73 5-4 La-Hf-O薄膜材料平帶電壓偏移及κ值增大之探討 75 5-4-1 Bulk性質-Fixed trap charge 76 5-4-2 HK-MG上界面層-Fermi level pinning 77 5-4-3 HK-Si下界面層-Electrical dipole[ 35] 79 5-5 La-Hf-O薄膜製程改進及漏電流-EOT關係圖 85 第六章 結論 90 參考文獻 91

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