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研究生:黃玉宣
研究生(外文):Huang, Yu-Syuan
論文名稱:以新的型態學為基礎方法解決半導體產業晶圓圖相似度搜尋問題
論文名稱(外文):A New Morphology-based Approach for Similarity Searching on Wafer Bin Maps in Semiconductor Manufacturing
指導教授:廖崇碩
指導教授(外文):Liao, Chung-Shou
學位類別:碩士
校院名稱:國立清華大學
系所名稱:工業工程與工程管理學系
學門:工程學門
學類:工業工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:47
中文關鍵詞:資料探勘形態學相似度搜尋半導體製造支持向量機晶圓圖
外文關鍵詞:Data miningmorphologysimilarity searchsemiconductor manufacturingsupport vector machineswafer bin maps
相關次數:
  • 被引用被引用:1
  • 點閱點閱:289
  • 評分評分:
  • 下載下載:17
  • 收藏至我的研究室書目清單書目收藏:0
由於現今半導體製造過程越來越複雜,其相對成本亦越來越高,因此提升產品良率更為重要。工程師可憑藉故障晶圓圖樣追溯發生異常原因的線索,例如異常的製程步驟或是機台發生問題等,進而提升產品的良率並降低成本。以往半導體廠對於故障晶圓圖的判斷,大多以人工目視的方式來進行,但由於人為主觀因素以及對空間圖形辨識能力的差距,經常造成圖形辨識結果並不一致,甚至因此影響問題解決的效率。因此,故障晶圓圖的檢測已成為現代半導體製造的關鍵問題。另一方面,隨著晶圓尺寸及晶片數目的擴大,晶圓圖的維度因此提高,使得故障晶圓圖樣較以往有更多特徵上的變化,例如:圖樣大小、密度、位置與旋轉等。導致傳統的圖形辨識或分類方法較難以準確捕捉到每個維度的變化 。此外,由於晶圓圖樣變化較以往更多,故對於新發現的特殊圖樣,與其相似的晶圓圖數量較為稀少。因此,本研究提出了一種新的概念,以形態學為基礎結合支持向量機(Morphology-based Support Vector Machine, MSVM)的方法解決相似晶圓圖樣自動搜尋的問題,以提升搜尋出同時包含許多特徵變化之相似故障圖樣的效率。利用傳統形態學的概念,例如侵蝕(erosion)、膨脹(dilation)、閉合(closing)與斷開(opening)等,產生許多相似的故障圖樣做為訓練樣本,並依據合作半導體廠的工程師建議,進而提出使晶圓圖樣有密度(density)、位置(shift)與旋轉(rotation)等特徵變化的方法,解決晶圓圖樣本稀少的問題。並利用支持向量機(SVM)方法來做相似度搜尋。本研究利用合作半導體廠的實際資料來驗證方法可行性以及執行效率,並與半導體廠的現行方法進行比較,MSVM確實能夠提升搜尋的準確率,且執行的運算時間也相對較低。本研究成果不僅解決傳統圖形辨識或分類方法無法同時考慮圖樣有多種特徵變化的困難,並提升晶圓圖辨別的一致性以及事故診斷的效率。

Due to the ever greater complexity of processes involved in semiconductor manufacturing, increasingly high inspection costs associated with defective wafers have become a critical concern of modern manufacturers. More importantly, because current high-dimensional wafer bin maps (WBMs) cause many variations in features, it is difficult to capture the variations of each dimension via traditional pattern recognition or classification methods. Therefore, this work proposes a novel similarity searching tool, a morphology-based support vector machine (MSVM) designed for defective wafer detection. Seven kinds of morphology-based training sample generations are presented; the morphological method includes original morphology definitions in addition to our proposed features. The MSVM can categorize practical industrial datasets according to variant degrees of similarities. The experimental results demonstrate the usefulness of our approach in the context of yield improvements in precision, low errors and acceptable computation cost.
摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 viii
第一章 緒論 1
1.1研究背景與動機 1
1.2研究目的 2
1.3論文架構 3
第二章 文獻回顧 4
2.1半導體產業簡介 4
2.1.1 積體電路 4
2.1.2 IC製造 5
2.1.3 IC製造主要階段 5
2.1.4 晶圓圖 6
2.1.5 晶圓圖種類 7
2.2傳統解決圖形辨識(pattern recognition)問題的方法 8
2.3支持向量機(Support Vector Machine , SVM) 10
2.3.1 SVM基本概念 10
2.3.2 Support Hyperplane – 線性可分割 11
2.3.3 Support Hyperplane – 非線性可分割 13
2.3.4 核心函數(Kernel function) 14
2.3.5 One-Class SVM 14
第三章 方法論 16
3.1以形態學(Morphology)為基礎創造相似訓練樣本 17
3.1.1傳統形態學運用在晶圓圖 17
3.1.2新型形態學運用在晶圓圖 21
3.2 資料預先處理 24
3.3 以One-Class SVM挑選不相似訓練樣本-以Center為例 26
3.4 以Two-Class SVM進行相似度搜尋 - 以Center為例 28
第四章 實驗結果分析討論 32
4.1實例驗證晶圓圖搜尋方法與結果分析 32
4.1.1資料處理 33
4.1.2根據形態學創造相似訓練資料 34
4.2結果分析 37
4.3 MSVM與半導體業現行方法比較 39
4.3.1半導體業現行方法 - MMA 39
4.3.2 MSVM與MMA之ROC curve比較 40
4.3.3 MSVM與MMA之運算時間比較 44
第五章 結論與未來展望 45
5.1結論 45
5.2未來展望 45
參考文獻 46


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