臺灣博碩士論文加值系統

半導體工業為資本密集產業，隨著需求及應用的增加，各晶圓廠的產能皆大幅的提昇，隨著晶圓直徑的增加，如何降低製造成本成為各廠間首要面臨的問題。晶圓的良率直接地影響著製造的成本，而控片則是晶圓廠間用來控制及提升晶圓良率的方法，晶圓的製造過程中，藉由控片來監控正常晶圓的品質與量測製程中生產機台的參數，控片雖非正常產品，但卻為生產正常晶圓時不可缺乏的。
在控片的使用上，一旦缺乏控片則將使機台無法監測，造成生產線的停擺，使的正常晶圓無法順利生產，故為了避免控片的缺乏造成產能損失，一般晶圓廠在現場皆放置了大量的控片，大量的控片卻也造成了成本的浪費與資金的積壓。因此，本文考量控片的使用流程與降級特性，在控片不缺乏的前提下，發展一控片使用之規劃。
本論文針對控片的使用情形提出線性規劃模型，根據各作業對控片的需求，發展一考量時程參數之控片規劃模式，利用網路問題之特性以線性規劃軟體迅速求出在滿足生產需求下最低控片使用量之計畫。

Semiconductor industry is capital-intensive industry. Due to increasing demand, many semiconductor companies raise their capacity substantially. How to reduce manufacturing cost becomes an important issue. The yield of wafer influences manufacturing cost directly. The use of control wafer is to control the wafer quality. For wafer manufacturing process, control wafer are used to maintain the quality of production wafer and monitor the environment of production equipments. Control wafers are not regular wafers for sale, but they are indispensable for wafers fabrication.
Lack of control wafers will stop production line. In order to avoid this problem, most wafer factories keep a large number of control wafers inventory. A large number of control wafers imply a huge amount of inventory costs. Considering control wafer usage and downgrade rule, this study develop a control wafers production planning system to schedule the usage of control wafers under the assumption that control wafer can not be short.
This study develops a linear programming model, based on the demand of manufacturing operation. By using this formulation, hopefully we can quickly obtain a plan, which minimize the usage of new control wafer.

第1章 緒論 1
1.1研究背景 1
1.2控擋片簡介 2
1.2.1控片的四個使用流程 2
1.2.2控片降級法則 5
1.2.3控片的使用時機 7
1.3研究動機 8
1.4研究目的 8
1.5研究方法 8
1.6本文架構 9
第2章 文獻探討 10
2.1控擋片在製品存貨管理 10
2.1.1在製品存貨對生產活動之影響 10
2.1.2控擋片存貨管理機制 10
2.2控擋片降級法則 15
2.2.1推式及拉式生產系統 15
第3章 研究方法與程序 18
3.1問題假設與名詞定義 18
3.1.1問題假設 18
3.1.2時程參數 18
3.2應用動態生產函數描述半導體控片生產流程 19
3.3控片管理線性規劃模型 23
第4章 運算結果與分析 31
4.1範例說明 31
4.2評估準則 36
4.3運算結果與分析 36
第五章 結論與未來展望 40
參考文獻 41

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