應變型矽鍺通道金氧半電晶體之研製｜國立中央大學博碩士論文系統

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研究生：	石靖節 Ching-Chieh Shih
論文名稱：	應變型矽鍺通道金氧半電晶體之研製 The fabrication of Si1-xGex MOSFET
指導教授：	李佩雯 Pei-Wen Li
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 電機工程學系 Department of Electrical Engineering
畢業學年度：	91
語文別：	中文
論文頁數：	70
中文關鍵詞：	矽鍺、乾蝕刻
外文關鍵詞：	SiGe, dry etch
相關次數：	點閱：13 下載：0
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應變型矽鍺金氧半電晶體之研製
摘要
本論文中，吾人利用應變型Si/SiGe異質結構製作了平面式n型與p型金氧半電晶體元件，並探討其在不同閘極通道長度(4.7μm ~ 0.6μm)之電性表現。
由直流I-V特性可清楚得知，應變型矽鍺 pMOSFET元件無論在驅動電流、傳導係數 (gm) 及次臨界斜率皆比bulk Si元件有較佳之特性表現外，同時也展現了較佳的短通道特性上如靜態漏電流Ioff (約低1個數量級)、Ion/Ioff及VT roll off等，因此SiGe pMOSFET元件有極大之潛能運用於高速低功率之電路。
然而，應變型矽鍺nMOSFET元件則因inter valley scattering的影響，故無法如P型元件一般展現出較傳統Si nMOSFET元件更佳之驅動電流與元件速度﹔此外因結構設計未最佳化，導致漏電流過大而無法與bulk Si nMOSFET元件比較其次臨界以及短通道特性表現。

The fabrication of Si1-XGeX MOSFET
Abstract
We have investigated the nMOSFET and pMOSFET with strain Si1-xGex/ Si heterostructure channels formed. The experimental results promise the potential of SiGe heterostructure MOSFET in CMOS application.
The incorporation of 20﹪Ge in the channel provides a drive current and transconductor enhancement and manifests advantage of short channel effect in pMOSFET. From measurement result in nMOSFET, the leakage was occurred and we can’t compare subthreshold region characteristic and short channel effects with bulk Si nMOSFET. The bulk Si nMOSFET drive current was better than the strained Si0.8Ge0.2, so it reduced strained Si0.8Ge02 nMOSFET and pMOSFET drive current difference and device structure become more comparable.

目錄
摘要………………………………………………………………....Ⅰ
致謝…………………………………………………………………Ⅱ
圖目錄……………………………………………………………....Ⅲ
表目錄………………………………………………………………...Ⅷ
序章  論文結構介紹…………………………………………………..Ⅸ
第一章 介紹………………………………………………………..1
1-1研究動機…………………………………………………..1
1-2研究目的…………………………………………………..2
1-3異質接面矽/矽鍺材料之簡述與在MOSFET運用……...3
第二章 蝕刻機制…………………………………………………...8
2-1前言…………………………………….………………......8
2-2乾蝕刻原理與機制………………………………………...8
2-3蝕刻反應器…………………………………….................10
2-4乾蝕刻環境的影響……………………………………….15
2-4-1蝕刻時反應腔室壓力……………………………..15
2-4-2射頻功率(RF power)的影響……………………...15
2-4-3蝕刻氣體流量的影響…………………………….16
2-4-4負載效應………………………………………….16
2-5結論………………………………………………………16
第三章 複晶矽閘極蝕刻…………………………………………22
3-1前言…………………………………….………………...22
3-2蝕刻氣體的選擇…………………………………………23
3-3 Fluorin Carbon Base氣體蝕刻實驗結果………………..24
3-4 HBr氣體蝕刻實驗結果……………….…………………25
3-4-1 HBr氣體流量、腔室壓力與平台功率的影響…..25
3-4-2氧氣(O2)氣體流量的影響………………………...26
3-5實際運用於元件結構結果……………………………….28
3-6結論……………………………………………………….31
第四章 應變型矽鍺金氧半電晶體製程與量測分析…………....45
4-1前言…………………………………….………………...45
4-2金氧半電晶體製程步驟………………………………....45
4-3電性量測…………………………………………………47
4-4結論……………………………………………………....52
第五章 總結與未來展望…………………………………………66
參考文獻資料…………………………………………………….68

                                

參考文獻資料
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