การปรับปรุงประสิทธิภาพของกระบวนการติดไดในการผลิตวงจรรวม / ธนรัตน์ สมบูรณ์ = Efficiency improvement of die bond process in intergrated circurits manufacturing / Thanarat Somboon
The objective of this research is to improve die bond process efficiency. After analyzed by using fish bone diagram techniques, it found the two root causes of delay transferring lot to next operation. (1) Improper production scheduling due to operator brings lot to available machine without checking the pervious product processing. The machine will be needed to setup for current processing and un-continuously machine running. (2) Long time for machine setup due to several step machine setups. The improvement consists of two parts. They are : part 1 production scheduling improvement using EDD and SPT technique are applied to develop the computer program to help the management and part 2 reduce the machine setup time using SMED technique, this techniques can separate external and internal activities. The external activities are (1) tooling preparation (2) lead frame stack adjustment. The internal activities are such as define epoxy dispensing and bonding position, needle installation, etc. Furthermore, the web intranet is developed to reduce time of the external activity, tool selection. The library program is developed to reduce time of internal activities The result reveals that production can reduce machine setup time from 65.3 min to 37.8 min (reduce 57.89%), reduce the delay lot from 49.48% to 20.8% (reduce 58.54%), reduce the processing time from 1394.5 min to 1034.81 min (reduce 25.79%) and also improve the machine utilization from 70.57% to 81.14% (increase 13.01%).
