研究生: |
許峰賓 Hsu Feng-Pin |
---|---|
論文名稱: |
鍺銻合金薄膜鈦元素滲雜之製程微結構及物性研究 |
指導教授: |
周麗新
L. H. Chou |
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: | 2001 |
畢業學年度: | 89 |
語文別: | 中文 |
論文頁數: | 82 |
中文關鍵詞: | 鍺銻合金 |
外文關鍵詞: | GeSb |
相關次數: | 點閱:2 下載:0 |
分享至: |
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摘要
本研究是針對鍺銻合金薄膜,滲雜第三元的Ti元素以觀察薄膜的微結構及物性。
本研究利用直流濺鍍法鍍製(GeSb9)1-XTiX(X≦7.5at.%)薄膜,由TEM觀察在250℃下退火7分鐘的薄膜,得知晶粒尺寸隨鈦濃度增加而變小;以XRD的繞射圖鑑定組成物(在儀器所能偵測的敏感度內)僅發現銻的結晶,繞射峰強度隨鈦濃度增加而降低;在添加鈦元素後,結晶溫度皆大於200℃,且隨鈦濃度增加而上升;結晶活化能卻在少量鈦元素(X≦1.1at.%)添加後快速上升,但隨著鈦濃度繼續增加而有反轉下降的現象;反射率對比值在藍光下(420nm及460nm),則低於20%。
Abstract
This study is to observe effects of titanium element doping on the microstructures and physical properties of germanium- antimony alloy films.
All films,(GeSb9)1-XTiX(X≦7.5at.%), were deposited with DC magnetron sputtering. Transmission electron microscopy (TEM)observation implied that the grain sizes reduced with the Ti concentration. X-ray diffraction was applied to identify phases of the films, and only diffraction peaks of Sb were observed within sensitivity of instrument. In addition, the diffraction peaks intensity decreased with Ti concentration. After Ti element doping, the crystallization temperatures raised with Ti concentration and are greater than 200℃ for all samples observed. The crystallization activation energy raised abruptly after a small amount of Ti element doping(X≦1.1at.%), but decreased afterward as Ti concentration kept increasing. At short wavelengths(420nm and 460nm), the optical reflection contrasts are lower than 20﹪.
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