晶圓製造廠機台刪減規劃模式之構建

Abstract

由於市場需求量的改變、產品組合的改變，或是支援新的海外晶圓製造廠的產能擴充計畫，半導體業者經常需要解決機台刪減問題，以維持晶圓製造廠的良好生產績效與提昇成本競爭力。機台刪減問題確實為半導體業者當前急需解決之重要課題之一，然而卻甚少研究文獻對於機台刪減問題提出有效解決方案。 考量產品組合與產出數量、保護性產能、生產績效，以及相關的成本因子，本文透過所發展的整數規劃模式，建立一套完善晶圓製造廠之短中長期機台刪減規劃機制，以協助業者解決支援海外產能擴充之舊廠機台刪減問題，或是在不景氣情況下的機台關機規劃。 透過本機制的運作與計算，可有效並明確建議半導體經營管理者應刪減舊廠哪一種機台與多少數量。實例驗證結果顯示：本機制為ㄧ良好的分析工具，在機台刪減規劃時，提供決策所需之重要資訊，有效地指出生產績效、生產計劃，以及機台投資成本節省之間的權衡關係。

Facing the changes in demand, product mixes, or the expansion plan for overseas fab capacity, managers of wafer fabs are forced to plan equipment elimination in order to maintain the good production performance and cost competitiveness in the market. Unfortunately, few studies have proposed effective solutions for interim and mid/long-term equipment elimination planning. Taking into considerations the product mix and corresponding output target, excessive capacity, production performance impact and the related cost items, this paper presents a new mechanism for interim and mid/long-term equipment elimination planning using a developed integer programming model. The proposed mechanism effectively provides valuable recommendations for the managements of wafer fabs regarding the type and quantity of equipment to eliminate. The experimental results show that the proposed mechanism is an excellent tool for analyzing the trade-off relationship among cycle time increases, cost savings, and output.