Patent ID: 7957827
Filing Date: 2011-06-07
Classification: G05B,H01L

Abstract:
1. A method of controlling warpage of a wafer subjected to a plurality of processes, the method being implemented by an IC manufacturing system, and the method comprising: measuring the warpage of the wafer by using a laser beam to scan a surface of the wafer before the processes are performed; and making a warp-related setting for at least one of the processes according to the warpage measured to perform the processes for the wafer, such that the warpage of the wafer is within a tolerable range after the processes, wherein making the warp-related setting for the at least one process comprises: selecting a machine from a plurality of machines by a controller to perform the process for the wafer, the machines being for conducting the same process but cause different warpages to an originally flat dummy wafer.