Modern Manufacturing Engineering ›› 2017, Vol. 436 ›› Issue (1): 29-34.doi: 10.16731/j.cnki.1671-3133.2017.01.006

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Modeling and scheduling of single-armed cluster tools with mixed wafer flows

Pan Chunrong, Wang Jipeng, Li Liang   

  1. School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China
  • Received:2015-06-18 Online:2017-01-20 Published:2018-01-10

Abstract: For improving the efficiency of cluster tools availably,the issues for processing different types of wafers concurrently in single-armed cluster tools are studied.A Petri net model describing the process of the single-armed cluster tools precisely,which is independent of diverse wafer flow pattern,is developed.Some equations,which define that the single-armed cluster tools is capable of performing a steady and cyclic operation under mixed wafer flows,are derived based on backward and cyclic scheduling strategy.Furthermore,the linear programming model is established and a periodic steady-state schedule is obtained as well.The presented scheduling is executed by the means of virtual wafer and the Gantt chart of scheduling is provided.Finally,the validity and efficiency of the proposed model and scheduling is verified.

Key words: cluster tools, Petri net, modeling, scheduling, wafer fabrication

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