Invention Grant
US09430593B2 System and method to emulate finite element model based prediction of in-plane distortions due to semiconductor wafer chucking 有权
系统和方法来模拟基于半导体晶片夹持的面内失真预测的有限元模型

System and method to emulate finite element model based prediction of in-plane distortions due to semiconductor wafer chucking
Abstract:
Systems and methods for prediction of in-plane distortions (IPD) due to wafer shape in semiconductor wafer chucking process is disclosed. A process to emulate the non-linear finite element (FE) contact mechanics model based IPD prediction is utilized in accordance with one embodiment of the present disclosure. The emulated FE model based prediction process is substantially more efficient and provides accuracy comparable to the FE model based IPD prediction that utilizes full-scale 3-D wafer and chuck geometry information and requires computation intensive simulations. Furthermore, an enhanced HOS IPD/OPD prediction process based on a series of Zernike basis wafer shape images is also disclosed.
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