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姓名 江直融(Chih-Jung Chiang)  查詢紙本館藏   畢業系所 光電科學與工程學系
論文名稱 交錯傾斜微結構薄膜在深紫外光區之研究
(The Research of Serial bideposition of anisotropic thin film at DUV)
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摘要(中) 本論文以氟化鎂、氟化鑭二種適用在深紫外波段的材料作研究。利用單電子槍,以70度的蒸鍍角度斜向蒸鍍氟化物薄膜,每次旋轉基板半圈使柱狀結構交錯,研究在相同厚度時不同交錯次數下,探討薄膜結構的變化,量測薄膜的應力及在此種交錯傾斜結構下薄膜對P、S偏振光垂直入射時在波長193nm的折射率差異,並且觀察薄膜對水氣的吸收及表面粗糙度。
薄膜結構以掃瞄式電子顯微鏡觀察沉積平面之剖面,應力則是以相位移式應力量測干涉儀測量,而兩個方向上的折射率則以光譜儀搭配偏振器的系統做量測,並配合以包絡法做擬合求得,水氣的吸收是利用傅立葉轉換紅外線光譜儀觀察,表面粗糙度則是利用原子力顯微鏡量測。
研究發現,隨著交錯層數的增加,薄膜的雙折射性有增大的現象,且薄膜的應力也有隨之減小的趨勢。
摘要(英) In this study we focused primarily on magnesium fluoride and lanthanum fluoride that promise a transparency at DUV wavelengths. We used 70° as the deposition angle and rotated the substrate stepwise by half a turn to form chevron structures by a single electron-beam source. We changed the rotation times in a specific thickness to investigate the changes in structure, stress, absorption band of water, surface roughness and linear birefringence.
Structures were observed by scanning electron microscopy (SEM) photographs of deposition-plane fractures. Stress was measured by Phase-Shifting Interferometer. We use the Fourier Transform Infrared (FTIR) Spectroscopy to observe the absorption band of water of thin films. Surface Roughness was measured by atomic force microscopy (AFM). The Refractive indices in two different directions were determined from spectrometer equipped with a polarizer.
We show that the linear birefringence would increase and the stress would decrease when the rotation times were increased.
關鍵字(中) ★ 傾斜
★ 紫外
★ 非均向性
★ 薄膜
關鍵字(英) ★ oblique
★ birefringence
★ DUV
★ thin film
論文目次 第一章 緒論 1
1-1 前言 1
1-2研究動機 2
1-3 氟化物材料特性 3
第二章 原理 5
2-1非均向介質 5
2-2非均向光學薄膜 8
2-2-1 主軸折射率 8
2-2-2 沉積平面與PS方向的定義 9
2-3自我遮蔽效應 11
2-4蒸鍍角度與柱狀傾斜角度 11
2-5 交錯傾斜微結構 12
2-6 包絡法 13
2-6薄膜應力 17
第三章 實驗架構與量測儀器 19
3-1 實驗方法與系統架構 19
3-1-1 基板準備 19
3-1-2 鍍膜機架構 20
3-1-3 真空系統 22
3-1-4 厚度監控 22
3-1-5 交錯傾斜結構實驗參數 23
3-1-6 預蝕刻基板實驗參數 24
3-2量測方法與儀器 25
3-2-1 掃瞄式電子顯微鏡 25
3-2-2 光譜儀及橢偏儀 26
3-2-4相位移式應力量測干涉儀 28
3-2-5 原子力顯微鏡 29
3-2-6 傅利葉轉換紅外線光譜儀 31
第四章 實驗結果與討論 32
4-1 氟化鎂非均向薄膜實驗結果與討論 32
4-1-1結構的影響 32
4-1-2 應力的影響 34
4-1-3 表面粗糙度的影響 35
4-1-4 傅利葉轉換紅外線光譜 36
4-1-5 光學特性的影響 37
4-2 氟化鑭非均向薄膜實驗結果與討論 38
4-2-1結構的影響 38
4-2-2應力的影響 39
4-2-3表面粗糙度的影響 40
4-2-4 傅利葉轉換紅外線光譜 41
4-2-5 光學特性的影響 42
4-3 在預蝕刻的基板上製鍍斜非均向性薄膜 43
第五章 結論 46
參考資料 49
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指導教授 李正中(Cheng-Chung Lee) 審核日期 2007-7-17
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