Patent ID: 6470231
Filing Date: 2002-10-22
Classification: G05B,G06Q

Abstract:
A method for dispatching wafers, said method comprising:determining a rank list of a plurality of wafers, wherein said rank list is sorted by a plurality of priorities of said wafers and each said wafer having an individual priority, wherein said priorities are automatically calculated with a plurality of system variables that are modified by a dispatcher; receiving a limitation database which limits a plurality of relations between said wafers and a plurality of tools, wherein said limitation database comprises information about an exception rule and other information that is used to identify each said wafer is belonged to a super hot run, a hot run, a rush run or a normal run, each of said tools being used to perform a specified process on said wafers and a process time being required to perform said specified process, wherein said limitation database is provided by said dispatcher; and automatically dispatching said wafers into a portion of said tools that are available in accordance with said rank list and said limitation database.