| 研究生: |
盧逸維 Lu, Yi-Wei |
|---|---|
| 論文名稱: |
TSV製程之矽銅雙效研磨液薄化製程的研究改善 Improvement on Thinning Process of TSV CMP Slurry |
| 指導教授: |
趙隆山
Chao, Long-Sun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 工程科學系碩士在職專班 Department of Engineering Science (on the job class) |
| 論文出版年: | 2012 |
| 畢業學年度: | 100 |
| 語文別: | 中文 |
| 論文頁數: | 74 |
| 中文關鍵詞: | 矽穿孔 、化學機械研磨 、田口方法 |
| 外文關鍵詞: | Through Silicon Via, Chemical Mechanical Polishing, Taguchi Method |
| 相關次數: | 點閱:153 下載:11 |
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三維堆疊之概念為堆疊多個晶片,讓不同功能元件整合在一起,而矽穿孔 (Through Silicon Via, TSV) 技術為三維積體電路之垂直導通的技術,此技術提供內部電力導通與熱通道的解決方案。TSV技術主要分為導孔形成、導孔填充、晶圓薄化、晶圓接合四大製程。本文以TSV晶圓薄化技術之化學機械研磨為主要研究對象,利用田口實驗方法探討化學機械研磨的各項控制參數對於TSV晶片研磨的影響。首先分別探討矽、銅兩種材料之化學機械研磨的移除率,使用田口方法的望大特性分析,探討最佳化的製程參數。再者,設定矽、銅移除率選擇比為2:1,利用田口方法的望目特性分析,探討影響選擇比之關鍵因子,試圖找出以提供研磨液及薄化製程研究開發參考。透過本實驗分析,可以了解矽、銅各別材料的移除率與矽銅移除率選擇比之可調控情形,主要是可以透過控制參數調整加來達成所要之移除率或選擇比。矽之移除率之主要控制參數為機械力,而銅之移除率與選擇比之主要控制參數為化學力。
Abstract
3D stack is stacking multiple chips with different functional components together. Through Silicon Via (TSV) technology is used to make the vertical channels in 3D ICs, which provides the solution of internal electric and heat conduction channels. The TSV technology includes four major processes, via formation, via filling, wafer thinning and wafer bonding. In this thesis, the chemical mechanical polishing for wafer thinning is the primary study object. The Taguchi method is employed to analyze the effects the control parameters on TVS wafer polishing. Firstly, the removal rates of chemical mechanical polishing for silicon and copper are investigated based on the larger-the-better characteristic. Secondly, the selectivity ratio of silicon and copper removal rates is set to be 2:1 and the nominal-the-best characteristic is used to find the key factors, whose result could be utilized as a reference for the development of polishing slurry and the thinning process. From the analysis results of the study, the controlled ability of reaching the desired removal rate and the selectivity ratio by adjusting the controlled parameters could be realized. The primary control parameters of silicon removal rate are mechanical, but the parameters of copper one and the selectivity ratio are chemical.
Keywords: Through Silicon Via, Chemical Mechanical Polishing, Taguchi Method
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