臺灣博碩士論文加值系統

本論文目的為應用滾筒式拋光系統(cylindrical polishing system)於薄板工件(例如晶圓)的拋光，使其得到無破壞層、高光滑度與高平整度的工件表面。文中建立了滾筒式拋光法於軸對稱形狀誤差補償之數學模式，以直接解聯立方程式法與最小平方誤差法探討刀具停留時間分佈與加工深度分佈，並利用模擬分析與實驗方法探討滾筒刀具對平板工件加工所產生的加工率分佈之效應對加工精度與刀具停留時間的影響，其效應包括加工長度效應、邊界效應與傾斜效應；也在不失加工精度的前提下，提出將刀具停留時間分佈均勻化的方法，以利於分層加工策略的應用。在了解這些幾何效應之影響後，即可根據表面形狀誤差規劃出一套合適的刀具停留時間，對工件進行平坦化之加工。另外也探討了非等向性拋光(an-isotropic polishing)之加工機率與表面粗度的關係。
內容可分為三個部份，一是滾筒式拋光系統對軸對稱形狀誤差補償之數學模式的建立，且根據數學模式定義了非等向性拋光之拋光角度與拋光機率；第二部份是利用電腦模擬的方式進行形狀誤差補償之時間規劃與分析；第三部份則是以實驗來探討滾筒式拋光之加工策略的適用性與加工時所產生之效應，與模擬之效應相互比較；並實際對一任意軸對稱形狀誤差之工件進行平坦化。

This thesis is aimed to apply cylindrical polishing system to a large flat workpiece (ex:wafer) to obtain high degree of planarization, low surface roughness and no crack layer. First, a mathematical model is presented which describes the axially symmetric form error compensation by cylindrical polishing process. The dwelling time-distribution of tool and the machining depth distribution are solved using the methods of simultaneous equations and least square error with non-negativity constraints. Then, using the simulation analysis and experimental method to examine the machining rate distribution effects on machining precision and the dwelling time-distribution of the tool when the workpiece is machining by cylindrical tool. The examined effects will include machining length effect, boundary effect and inclined effect. Under the range of the machining precision required, the approach to smooth the dwelling time-distribution of tool that will benefit layer-by-layer removing strategy. After these analyses, an adequacy dwelling time-distribution of the tool can be designed according to the workpiece form error. In addition, the relative between the machining probability due to the an-isotropic polishing property and surface roughness will be discussed.

The contents of this thesis include three parts. First, a mathematical model is presented which describes the axially symmetric form error compensation by cylindrical polishing process. And, the polishing angles and polishing probability of the an-isotropic polishing property will be identified according to the mathematical model. Second, the design of dwelling time-distribution of tool and the analysis of the geometric effects will be discussed by computer simulation. Third, the experimental results will show the suitable of the machining strategy and compare the machining effects with the simulated results. And, the planarization of the workpiece that has axially symmetric form error will be done.

目錄
謝誌………………………………………………………………………I
Abstract.………………………………………………………………II
論文摘要……………………………………………………………….IV
目錄……………………………………………………………………..V
圖索引…………………………………………………………………VII
表索引………………………………………………………………….XI
第一章 緒論 …………………………………………………………..1
1.1 前言 …………………………………………………………..1
1.2 現有平坦化之方法簡介 ……………………………………..2
1.3 研究動機與目的 ……………………………………………..4
1.4 滾筒式拋光法 ………………………………………………..5
1.5 內容介紹 ……………………………………………………..7
第二章 滾筒式拋光系統之軸對稱形狀誤差補償原理 ……………..9
2.1 滾筒式拋光法加工原理 ……………………………………..9
2.2 軸對稱形狀誤差補償之數學模式 …………………………10
2.3 非等向性拋光之特質 ………………………………………13
2.4 結論 …………………………………………………………15
第三章 滾筒式拋光法加工策略之模擬分析 ………………………17
3.1 刀具停留時間直接解法 ……………………………………17
3.2 非負值最小平方誤差法 ……………………………………20
3.3 幾何特性之效應分析 ………………………………………22
3.3.1 形狀誤差幾何特性 ……………………………………22
3.3.2 加工率幾何特性 ………………………………………24
3.4 最小刀具停留時間之分析 …………………………………29
3.5 非等向性拋光之加工機率分析 ……………………………32
3.6 結論 …………………………………………………………33
第四章 加工特性之實驗分析 ………………………………………35
4.1 實驗規劃 ……………………………………………………35
4.2 實驗設備 ……………………………………………………42
4.2.1 實驗系統簡介 ……………………………………….42
4.2.2 實驗設備及量測儀器 …………………………….…44
4.3 實驗結果 ……………………………………………………45
4.4 結論 …………………………………………………………51
第五章 整合討論 ……………………………………………………53
5.1 超精密加工適用性之探討 …………………………………53
5.2 加工長度效應之探討 ………………………………………54
5.3 邊界效應之探 ………………………………………………55
5.4 傾斜效應之探討 ……………………………………………55
5.5 非等向性拋光之探討 ………………………………………56
第六章 結論 …………………………………………………………58
參考文獻 ………………………………………………………………60

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