研究生: |
陳芷喬 Chen, Chih-Chiao |
---|---|
論文名稱: |
於鍺基板上以原子層化學氣相沉積鍍製氧化鑭-氧化鋁-氧化鈦多疊層閘極介電層之研究 The Study of La2O3-Al2O3-TiO2 Multilayer Gate Dielectrics on Germanium Substrate prepared by Atomic Layer Deposition |
指導教授: |
林樹均
Lin, Su-Jien |
口試委員: |
甘炯耀
張哲豪 |
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: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 104 |
中文關鍵詞: | 鍺 、原子層化學氣相沉積 |
外文關鍵詞: | Ge, high-k, ALD, dielectric |
相關次數: | 點閱:2 下載:0 |
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高速通道材料Ge由於其原生氧化物的不穩定,使得Ge/high-κ之界面性質無法與Si相比擬,因此本實驗鍍製了多種組合之薄膜疊層,試圖找出最適合的介電層材料,進行電性及材料物性之分析。實驗利用原子層化學氣相沉積法(Atomic layer chemical deposition, ALCVD)沉積四種不同的high-κ疊層:Ge/Al2O3/TiO2、Ge/La2O3/Al2O3/TiO2、Ge/Al2O3/La2O3/TiO2、Ge/La2O3/TiO2於n- type Ge基板與p- type Ge基板上,並利用射頻濺鍍鍍製Pt上、下電極後,進行Post metal annealing(PMA)之forming gas熱處理,製備成MOS電容;再藉由材料分析IPXRD、XPS、AES,探討此四種不同薄膜結構之材料差異對電性所造成的影響。實驗結果顯示,Ge/La2O3/Al2O3/TiO2堆疊之薄膜,由於有LaGeOx鍵結的生成,能抑制具揮發性的GeO產生,Dit可降至8.17 × 1011 cm-2,相較於其他種類之薄膜,電性表現最佳。
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