考慮線上重工之瓶頸機台派工法則構建

Abstract

一般晶圓代工廠大多定義黃光區為整廠之派工中心，若在黃光區制定一套有效的派工法則，考量不良品之重工作業將有助於協調及均衡整條生產線之作業負荷，並可提昇晶圓製造之生產力和效率，降低線上在製品庫存及縮短生產週期，進而滿足顧客交期及品質要求。本研究以線上重工為基礎，將重工批量因素納入派工法則作為衡量，發展一考量重工策略之派工法則。並且針對黃光區裡完工比例較高的批量賦予以一權重，使其能儘早完工，以降低加工機台上等候線之負荷，進而提高產出。

In general, wafer fabrication factories mostly define the photolithography area as the dispatching center of the whole factory. To establish a set of operative dispatching rule in the photolithography area and considering the rework of defective products would be contributive to coordinate and balance the workload in the whole production line. Furthermore, it would help to enhance the productivity and efficiency of wafer fabrication, reduce the stock of on-line WIP and shorten the production cycle time, and satisfy the requirements of customers about the production due time and the product quality. This research uses on-line rework as the basis to bring the rework of batch process factor into the dispatching rule for measurement, then develops the dispatching rule which includes the rework strategy. Besides, this research focuses on the high finished proportion of batch in the photolithography area in order to finish the manufacturing procedure faster, lighten the machine workload of the waiting line, and finally increase the quantity of output.