Patent ID: 9588441
Date: 2017-03-07
CPC Classifications: G03F,G05B,H01L,Y02P

Claim:
1. A method for process control in processing a substrate, comprising: a) generating a sampling plan, the sampling plan defining which areas of the substrate to sample and the sampling plan having a sampling density of an area on the substrate that is determined by changes in substrate geometry information for the substrate, the changes in the substrate geometry information being derived from one or more analyses of the substrate performed using measurements of a preprocess substrate geometry obtained with a first analysis tool before a fabrication process is performed on the substrate, wherein the changes in substrate geometry information for the substrate include a delta of two geometry measurements on the substrate, wherein the preprocess substrate geometry includes a determination of at least site flatness or warp of the substrate itself; and b) feeding forward the sampling plan to a second analysis tool that samples the areas of the substrate defined by the sampling plan after the fabrication process is performed on the substrate with a process tool.