研究生: |
盧彥良 Yen-Liang Lu |
---|---|
論文名稱: |
不同成分鋯鈦酸鉛薄膜電場退火對微結構與電性之影響 |
指導教授: |
胡塵滌
Chen-Ti Hu 呂正傑 Ching-Chich Leu |
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: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 85 |
中文關鍵詞: | 鋯鈦酸鉛 、鐵電薄膜 、殘留應力 |
外文關鍵詞: | PZT, ferroelectric, residual stress |
相關次數: | 點閱:3 下載:0 |
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本論文探討在鐵電薄膜退火結晶過程同時,施加正/負電壓而產生正/負電場,對於不同成分與結構之PZT薄膜的影響。不同於文獻中施加的小電場,本實驗施加於試片上之電場(250kV/cm)遠大於矯頑電場;實驗結果顯示,隨著PZT成分的變化,施加電場的極性對不同結構薄膜會有不一樣的影響。
從薄膜的結晶方位的量測中,發現對Zr%<50%之正方晶結構,施加電場易使(100)之結晶比例降低,相反的,當Zr%>50%的菱形晶結構,施加電場卻造成(100)結晶方向之提升。在PZT薄膜之殘留極化值上之量測,發現對Zr<50%之薄膜而言,退火施加正電場會使其殘留極化值升高,施加負電場則導致該值降低;但若Zr>50%,施加正負電場皆可使其殘留極化值獲得提升;顯示施加電場退火伴隨著成分不同而造成薄膜特性相異之趨勢。
而在薄膜殘留應力的分析上,發現在Zr=55%的試片中,施加電場者殘留應力較低,推測此可能為提高殘留極化值之主要影響因素之一。
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