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研究生: 許仕忠
Shih-Chung Hsu
論文名稱: 拋光墊之修整力量分析與銅膜晶圓化學機械拋光影響研究
Analysis on Pad Dressing Force for Cu-Chemical Mechanical Polishing Process
指導教授: 陳炤彰
Chao-Chang A. Chen
口試委員: 楊宏智
Chen-Wei Yang
陳順同
Shun-Tong Chen
鄭逸琳
Yih-Lin Cheng
張以全
I-Tsyuen Chang
學位類別: 碩士
Master
系所名稱: 工程學院 - 機械工程系
Department of Mechanical Engineering
論文出版年: 2020
畢業學年度: 108
語文別: 中文
論文頁數: 222
中文關鍵詞: 化學機械平坦化拋光墊修整鑽石修整器力量分析
外文關鍵詞: Chemical Mechanical Polishing(CMP), Pad Dressing, Diamond Dresser, Force Analysis
相關次數: 點閱:233下載:1
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在化學機械平坦化/拋光(Chemical Mechanical Planarization/ Polishing, CMP)製程中,需要鑽石修整器來維持拋光墊表面之穩定性,而拋光墊表面形貌會直接影響到晶圓表面,因此修整製程(Dressing process)後之拋光墊表面形貌對於CMP是非常重要的一環。本實驗使用三顆Pyradia鑽石修整碟所組成的108顆鑽石修整器,在其中一顆Pyradia鑽石修整碟上安裝無線力量感測器,搭配不同下壓力與轉速,對於具孔洞之拋光墊進行修整實驗。本研究為探討修整力量對於拋光墊之影響,將量測到的三軸力量換算為108顆鑽石修整器之切削力。Pyradia鑽石修整碟具有均勻的鑽石突出高度,假設每顆鑽石都能均勻的對拋光墊修整,因此將108顆鑽石修整器之切削力換算為單顆鑽石之切削力,搭配單顆鑽石修整實驗結果,以近似正交切削(Quasi-orthogonal machining)為基礎,建立鑽石修整力量模型來分析拋光墊之表面形貌。透過無溝槽拋光墊之修整實驗,建立修整力量與表面形貌之關係,再以商用x-y溝槽拋光墊,驗證鑽石修整力量模型所計算出之犁削比,最後對於銅膜晶圓進行化學機械拋光實驗,透過拋光墊表面對於銅模晶圓之影響,驗證修整力量對於拋光墊表面形貌之影響。


In the Chemical Mechanical Planarization/Polishing process, the diamond dresser is required to maintain the stability of the polishing pad surface, and the surface topography of the polishing pad will directly affect the wafer surface. Therefore, the surface topography of the polishing pad after the dressing process is more important for CMP. In order to explore the influence of dressing power on polishing pads, the measured three-axis power was converted into the cutting force of 108 diamond dressers. The Pyradia diamond disk has a uniform diamond protrusion height, assuming that each diamond can evenly dress the polishing pad. Therefore, the cutting force of 108 diamond dresser is converted into the cutting force of a single diamond, combined with the experimental results of single diamond dressing, and based on Quasi-orthogonal machining, a diamond dressing force model is established to analyze the topography of polishing pad. Through the dressing experiment of the non-groove polishing pad, the relationship between the dressing force and the surface topography was established, and then the commercial x-y groove polishing pad was used to verify the plowing ratio calculated by the single diamond dressing force model. CMP experiment was performed on copper blanket wafer, and the influence of the dressing force on the surface topography of the polishing pad was verified through the influence of the polishing pad surface on the copper blanket wafer.

摘要 I Abstract II 致謝 III 目錄 IV 圖目錄 VIII 表目錄 XVI 符號表 XVIII 第一章 緒論 1 1.1 研究背景 1 1.2 研究目的與方法 3 1.3 論文架構 4 第二章 文獻回顧 6 2.1 材料分類 6 2.2 拋光墊相關文獻探討 8 2.3 鑽石修整器相關文獻探討 14 2.4 文獻回顧總結 24 第三章 修整力量模型與修整模擬 25 3.1 拋光墊修整機制與力量分析 25 3.2 鑽石位置校正方法 42 3.3 鑽石修整模擬 57 第四章 實驗設備與規劃 66 4.1 實驗設備 66 4.1.1 拋光機台 66 4.1.2 無線力量感測系統 68 4.1.5 鑽石位置驗證實驗 99 4.2 實驗耗材 104 4.2.1 拋光墊 104 4.2.2 鑽石修整碟 106 4.2.3 鑽石砂紙 108 4.2.4 拋光液 109 4.3 實驗量測設備 110 4.4 實驗規劃 111 4.4.1 修整力量分析與靜態量測實驗(實驗A) 111 4.4.2 修整力量分析與動態量測實驗(實驗B) 112 4.4.3 銅膜晶圓化學機械拋光實驗(實驗C) 113 第五章 實驗結果與討論 114 5.1 修整力量分析與靜態量測實驗(實驗A) 114 5.1.2 乾/濕式修整實驗於無溝槽拋光墊 115 5.1.3 鑽石路徑與重疊點模擬結果 120 5.1.4 拋光墊靜態量測結果 128 5.1.5 修整力量量測結果 132 5.2 修整力量分析與動態量測實驗(實驗B) 137 5.2.1 濕式修整實驗於x-y槽拋光墊 137 5.2.2 拋光墊動態量測結果 140 5.2.3 修整力量量測結果分析 144 5.3 銅膜晶圓化學機械拋光實驗(實驗C) 152 5.3.1 晶圓移除率 152 5.3.2 晶圓表面粗糙度 154 5.4 綜合結果與討論 157 5.4.1 承載比與犁削比之關係 157 5.4.2 切削方向對於拋光墊之影響 160 第六章 結論與建議 162 參考文獻 165 附錄A 鑽石修整模擬程式碼 168 附錄B 重疊點模擬結果 174 附錄C 拋光墊表面形貌 182 附錄E 量測儀器與設備 196

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