第三章、 文獻回顧分析( SiN x 氮化矽沉積薄膜特性)
5.3 效益測試結果
進行 ICOS color measurement 比對動作時,同樣先以拋光晶片來進行厚度檢 控動作,再配合橢圓儀膜厚量測行為與 PECVD 的速度參數進行薄膜厚度調
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Histogram of BlueEye2_Average_total Normal
Panel variable: Bin
現行載具 Bin 1
架空處理 Bin2
緊接著來看太陽能電池片的效率量測各參數資料,因為實驗事前電池
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圖 5-20 光電轉換電性參數表
圖 5-21 光電轉換效率分布表
第六章、結論與展望
6-1 結論
經過一系列的實驗下來,我們初步獲知各種沉積條件變化下對 SiNx氮 化矽沉積薄膜特性的影響。反應壓力、射频功率、反應總氣體流量和反應 温度的增加上升大都会引起 SiNx薄膜折射率的增加趨勢,而 NH3/SiH4流量 比率變化增加卻是讓 SiNx薄膜折射率下降。至於薄膜生長厚度的影響,則 因反應總氣體流量、射频功率和反應温度的增加上升而增加沉積速率;但 沉積速率卻因反應壓力與 NH3/SiH4流量比率增加而遞減。不過在薄膜生長 均勻性方面卻沒有直接的關係影響,雖然各沉積條件都對於沉積速率有直 接關係,但都無法針對實際工業生產所面臨局部特殊性異常薄膜偏薄現 象,提供有效改善效果。
在最後的實驗中,針對電池片表面抗反射氮化矽沉積異常特殊現象進 行變更載具與電池片接觸方式,提供一組架空電池片方式的載具,得到實 驗結果比較可以看出,同時因為所有的 PECVD 製程參數條件並沒有變動情 況下,所以在沉積生長的氮化矽薄膜特性上並沒有太明顯差異變化與影 響。不過,此次的沉積薄膜均勻性卻因為電池片周邊的膜厚增加而獲的改 善。我們認為架空電池片方式提供了可免除與載具直接接觸可能性,避免 電池片直接受載具的溫度變化影響,避免直接造成基材電池片的溫度變
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最後,希望在此能藉由載具上的變更設計,供業界改善太陽能電池片 顏色參考方向。希望能藉由最簡單且花費最低費用方式,達到減輕各廠的 再製重工費用,降低生產成本也同時減少光電效率量測的誤差。最後提供 圖 6-1 a & b 為這次實驗的載具設計圖給大家參考。
圖 6-1 a.載具設計變更圖示
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現行使用載具 架空載具處理
圖 6-1 b.載具設計變更實例照片圖
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