Patent ID: 9625823
Date: 2017-04-18
CPC Classifications: G01L,G03F,H01L

Claim:
1. A method, comprising: specifying a plurality of discrete measurement points on a substrate, the substrate being configured to receive a film deposition; measuring a pre-deposition local thickness individually for each of said plurality of discrete measurement points utilizing at least one thickness measurement apparatus; measuring a pre-deposition local wafer shape parameter individually for each of said plurality of discrete measurement points utilizing at least one wafer shape measurement apparatus; measuring a post-deposition local film thickness individually for each of said plurality of discrete measurement points utilizing at least one thickness measurement apparatus when a film is deposited on the substrate by a wafer process equipment; measuring a post-deposition local wafer shape parameter individually for each of said plurality of discrete measurement points utilizing at least one wafer shape measurement apparatus when the film is deposited on the substrate by the wafer process equipment; calculating, utilizing a computer processor, a local film stress value individually for each of said plurality of discrete measurement points, wherein at least two of said plurality of discrete measurement points have different local film thickness values, and wherein each local film stress value is calculated based on the pre-deposition and post-deposition local film thickness measurements and the pre-deposition and post-deposition local wafer shape parameters obtained for each corresponding measurement point; and monitoring operations of the wafer process equipment based on the local film stress value calculated for the plurality of discrete measurement points.