Patent Document ID: 20160283625
Application ID: 15172667
Patent Status: 0

Claim One:
1. A computer implemented method for providing in-plane distortion (IPD) prediction, the method comprising: (a) generating a series of Zernike basis wafer shapes; (b) performing finite element (FE) model based IPD prediction for the series of Zernike basis wafer shapes; (c) performing higher order shape (HOS) based IPD prediction for the series of Zernike basis wafer shapes; (d) comparing the FE model based IPD prediction and the HOS based IPD prediction of a particular Zernike basis wafer shape of the series of Zernike basis wafer shapes to determine whether said particular Zernike basis wafer shape produces large prediction differences between the FE model based IPD prediction and the HOS based IPD prediction; (e) storing the Zernike basis wafer shapes that produce large prediction differences between the FE model based IPD prediction and the HOS based IPD prediction; and (f) providing a HOS based IPD prediction for a given wafer utilizing the stored Zernike basis wafer shapes.