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研究生:周佳逸
研究生(外文):Chia Yi Chou
論文名稱:氮化鎵緩衝層條件最佳化對氮化鎵高電子遷移率場效電晶體之特性分析
論文名稱(外文):Influence of Buffer Carbon Doping and Buffer Thickness on Low Frequency Noise Behavior of AlGaN/GaN HEMTs
指導教授:邱顯欽
指導教授(外文):H. C. Chiu
學位類別:碩士
校院名稱:長庚大學
系所名稱:光電工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
論文頁數:105
中文關鍵詞:氮化鎵緩衝層低頻雜訊氮化鈦氮化硼
外文關鍵詞:Gallium Nitridebuffer layerCarbonLow Frequency NoiseTitanium NitrideBoron Nitride
相關次數:
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指導教授推薦書
口試委員會審定書
誌謝 iii
摘要 iv
Abstract v
目錄 vi
圖目錄 ix
表目錄 xiii
第一章 緒論 - 1 -
§1.1 研究動機 - 1 -
§1.2 論文架構 - 2 -
第二章 氮化鋁鎵/氮化鎵高電子遷移率場效電晶體理論基礎 .- 3 -
§2.1 簡介 - 3 -
§2.2 氮化鎵高電子遷移率場效電晶體 - 3 -
§2.3 氮化鎵緩衝層 - 10 -
§2.4 氮化物金屬閘極製程簡介 - 13 -
第三章 氮化鎵緩衝層的成長厚度對於氮化鋁鎵/氮化鎵高電子遷移率場效電晶體之電性分析 - 15 -
§3.1 簡介 - 15 -
§3.2 磊晶結構 - 16 -
§3.3 成長不同厚度氮化鎵薄膜之緩衝層對於氮化鎵高電子移導率場效電晶體製程 - 18 -
§3.4 量測結果與討論 - 27 -
3.4.1 室溫直流特性與變溫直流特性 - 27 -
3.4.2 電晶體低頻雜訊分析 - 34 -
3.4.3 可靠度量測 - 37 -
§3.5 結語 - 39 -
第四章 氮化鎵緩衝層碳摻雜濃度對氮化鋁鎵/氮化鎵高電子移導率場效電晶體之電性分析 - 40 -
§4.1 簡介 - 40 -
§4.2磊晶結構 - 40 -
§4.3氮化鎵緩衝層的碳摻雜濃度對於氮化鎵高電子移導率場效電晶體製程 - 42 -
§4.4 量測結果與討論 - 45 -
4.4.1室溫直流特性與變溫直流特性 - 45 -
4.4.2可靠度低頻雜訊量測 - 52 -
4.4.3 基板外加偏壓量測 - 56 -
§4.5 結語 - 63 -
第五章 氮化物金屬閘極應用氮化鎵高電子移導率場效電晶體 - 64 -
§5.1 簡介 - 64 -
§5.2 磊晶結構 - 65 -
§5.3 氮化物金屬閘極應用於氮化鎵高電子移導率場效電晶體製程 - 66 -
§5.4 氮化物金屬材料分析 - 70 -
5.4.1 氮化鈦與氮化硼材料簡介 - 70 -
5.4.2 X光單晶繞射分析(XRD) - 71 -
5.4.3 四點探針薄膜量測 - 73 -
§5.5 量測結果與討論 - 74 -
5.5.1 直流特性 - 74 -
5.5.2變溫直流特性 - 77 -
5.5.3低頻雜訊量測 - 79 -
§5.6 結語 - 83 -
第六章 結論 - 84 -
參考文獻 - 86 -


圖目錄
圖2-1 材料晶格常數及能帶極化係數關係圖 - 6 -
圖2-2 模擬氮化鎵材料的極化效應反應在能帶變化趨勢 - 7 -
圖2-3 氮化鎵材料的極化效應反應對於電子濃度分佈圖 - 7 -
圖2-4 氮化鋁鎵/氮化鎵接面能帶圖 - 9 -
圖2-5 鎵面與氮面之氮化鎵薄膜的原子結構圖 - 11 -
圖2-6 元件磊晶結構示意圖 - 11 -
圖2-7 (a)未熱處理Ti/n-GaN和(b)700℃熱處理後形成的TiN/n-GaN界面能帶結構圖 - 14 -
圖3-1 氮化鋁鎵/氮化鎵高電子遷移率電晶體結構圖 - 17 -
圖3-2 元件隔離蝕刻製程步驟示意圖 - 19 -
圖3-3 元件歐姆接觸製程示意圖 - 21 -
圖3-4 閘極蕭特基接觸製程步驟示意圖 - 22 -
圖3-5 元件金屬連接線製程步驟示意圖 - 24 -
圖3-6 元件鈍化層製程步驟示意圖 - 26 -
圖3-7 元件製作後的顯微鏡正視圖 - 26 -
圖3-8 不同氮化鎵緩衝層厚度比例之汲極電流與元件轉導圖 - 27 -
圖3-9 不同氮化鎵緩衝層厚度比例之蕭基二極體特性 - 28 -
圖3-10 不同溫度下元件之電流−電壓特性 - 30 -
圖3-11 元件在不同溫度下之gm,IDSmax變化圖 - 31 -
圖3-12 元件在不同摻雜濃度下之靜態崩潰特性圖 - 33 -
圖3-13 元件在不同摻雜濃度下之水平及垂直崩潰電壓特性圖 - 33 -
圖3-14 元件在室溫下低頻雜訊量測結果 - 34 -
圖3-15 元件在室溫下低頻雜訊量測結果 - 35 -
圖3-16 元件在室溫下低頻雜訊量測結果 - 35 -
圖3-17 應力測試下元件之電流−電壓特性 - 37 -
圖3-18 區域A在應力測試下元件的雜訊比較 - 38 -
圖3-19 區域B在應力測試下元件的雜訊比較 - 38 -
圖4-1 氮化鋁鎵/氮化鎵高電子遷移率電晶體結構圖 - 41 -
圖4-2 元件製程步驟示意圖 - 43 -
圖4-3 元件製做後的顯微鏡正視圖 - 44 -
圖4-4 元件之二次質譜儀(SIMS)圖 - 44 -
圖4-5 元件電壓電流特性曲線 - 46 -
圖4-6 元件電流與元件轉導特性曲線 - 47 -
圖4-7 碳離子佈植在氮化鎵緩衝層蕭基二極體特性 - 47 -
圖4-8 元件在不同溫度下之gm,IDSmax變化圖 - 48 -
圖4-9 元件在不同摻雜濃度下之靜態崩潰特性圖 - 50 -
圖4-10 元件在不同摻雜濃度下之緩衝層水平崩潰電壓特性圖 - 51 -
圖4-11 元件在不同摻雜濃度下之緩衝層垂直崩潰電壓特性圖 - 51 -
圖4-12 應力測試下元件之電流−電壓特性 - 52 -
圖4-13 區域A在應力測試後元件的直流特性比較 - 53 -
圖4-14 區域A在應力測試後元件的雜訊值比較 - 53 -
圖4-15 區域B在應力測試後元件的直流特性比較 - 54 -
圖4-16 區域B在應力測試後元件的雜訊值比較 - 54 -
圖4-17 基板外加偏壓示意圖 - 56 -
圖4-18 基板偏壓下元件汲極電流3D座標圖 - 58 -
圖4-19 元件在基板偏壓下低頻雜訊量測結果 - 60 -
圖4-20 元件在基板偏壓變化下VGS-VTH之霍格常數 - 62 -
圖4-21 元件在基板偏壓變化下VGS-VTH之介面缺陷密度 - 62 -
圖5-1 氮化鋁鎵/氮化鎵高電子遷移率電晶體結構圖 - 65 -
圖5-2 閘極蕭特基接觸製程步驟示意圖 - 67 -
圖5-3 元件製程步驟示意圖 - 68 -
圖5-4 鎳/金閘極金屬元件製做後的顯微鏡正視圖 - 69 -
圖5-5 氮化鈦閘極金屬元件製做後的顯微鏡正視圖 - 69 -
圖5-6 TiN薄膜在不同工作壓力之XRD量測 - 72 -
圖5-7 BN薄膜在不同工作壓力之XRD量測 - 72 -
圖5-8 三種閘極材料製程元件電流與元件轉導特性曲線 - 75 -
圖5-9 三種閘極材料元件之蕭特基二極體特性 - 75 -
圖5-10 元件之靜態崩潰特性圖 - 76 -
圖5-11 元件變溫下之電流與元件轉導特性曲線 - 78 -
圖5-12 三種電晶體改變VGS-VTH之雜訊圖 - 79 -
圖5-13 元件在100Hz下變化VGS-VTH所得到之斜率 - 80 -
圖5-14 元件在100Hz下變化VGS-VTH之霍格常數 - 81 -
圖5-15 元件在100Hz下變化VGS-VTH之介面缺陷密度 - 82 -

表目錄
表2-1 半導體材料特性比較 - 5 -
表3-1 不同比例之氮化鎵緩衝層厚度之霍爾量測比較表 - 17 -
表3-2 不同比例之氮化鎵緩衝層厚度隨溫度衰減之特性比較表 - 31 -
表4-1 不同摻雜濃度下氮化鎵緩衝層之霍爾量測比較表 - 41 -
表4-2 元件隨溫度變化之衰減特性比較表 - 49 -
表4-3 基板各偏壓下元件之綜合整理表 - 58 -
表5-1 三種閘極金屬之材料特性 - 70 -
表5-2 氮化物金屬導電度 - 73 -
表5-3元件變溫下之綜合整理表 - 78 -

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