Patent ID: 8295966

Claim:
A method for predicting etch rate uniformity for qualifying health status of a processing chamber during substrate processing of a set of substrates, comprising: executing a recipe on a first substrate of said set of substrates; receiving processing data from a first set of sensors during said executing of said recipe; analyzing said processing data utilizing a subsystem health check predictive model to determine calculated data, said calculated data including at least one of etch rate data and uniformity data, wherein said subsystem health check predictive model is constructed by correlating a first set of data and a second set of data, said first set of data includes measurement data from a set of film substrates and said second set of data includes processing data collected during analogous processing of a set of non-film substrates; performing a comparison of said calculated data of said first substrate against a set of control limits as defined by said subsystem health check predictive model; and generating a warning if said calculated data is outside of said set of control limits.