博碩士論文 91521056 詳細資訊




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姓名 蔣國軍(Kuo-Chun Chiang)  查詢紙本館藏   畢業系所 電機工程學系
論文名稱 覆晶式藍光發光二極體製程技術之研究
(The Study of Process Technique for Flip-Chip Blue Light Emitting Diodes (LEDs))
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摘要(中) 覆晶式氮化鎵藍光發光二極體比正面發光式氮化鎵藍光發光二極體有提高發光亮度以及可增加熱散逸的能力,減緩因熱累積而造成的效率下降等好處,所以覆晶式氮化鎵藍光發光二極體已經成為LED產業的主流產品。本篇論文研究將針對鈦/鋁/鈦/金 (Ti/Al/Ti/Au)、鉻/鋁/鉻/金 (Cr/Al/Cr/Au)、鉻/鈦/金(Cr/Ti/Au) 金屬組合,在n型氮化鎵歐姆接觸電極和p型氮化鎵材料上高反射率金屬電極同時製作,不須做n型氮化鎵歐姆接觸電極的金屬融合(Alloy) 和蒸鍍焊墊金屬層 (Bonding Pad),以減少製程步驟和節省材料成本,並且探討這些金屬組合的熱穩定性,觀察發光二極體電流–電壓特性變化以及光反射強度的改變。
關鍵字(中) ★ 藍光發光二極體
★ 覆晶式
關鍵字(英) ★ GaN blue LEDs
★ Flip-Chip
論文目次 第一章 導 論 1
第二章 氮化鎵發光二極體元件結構與製程 4
2.1 發光二極體元件結構 4
2.2 發光二極體元件製程 5
2.3歐姆接觸及反射層金屬選擇 13
第三章 電流-電壓特性與熱穩定性分析 21
3.1 Ti/Al/Ti/Au金屬電極 23
3.2 Cr/Al/Cr/Au金屬電極 29
3.3 Cr/Ti/Au金屬電極 33
3.4金屬電極的表面形態 36
3.5 Ti/Al/Ti/Au、Cr/Al/Cr/Au 與Cr/Ti/Au金屬電極熱穩定性比較 41
第四章 光反射強度特性分析 44
4.1介 紹 44
4.2 Ti/Al/Ti/Au、Cr/Al/Cr/Au 與Cr/Ti/Au金屬電極比較 47
第五章 結 論 51
參考文獻 52
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指導教授 辛裕明(Yue-ming Hsin) 審核日期 2005-6-28
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