Patent ID: 6913938

Claim:
A method of film deposition in a chemical vapor deposition (CVD) process, comprising: a) providing a model for CVD deposition of a film that defines a plurality of regions on a wafer and identifies one or more film properties for at least two regions of the wafer and at least one deposition model variable that correlates with the one or more film properties; b) depositing a film onto a wafer using a first deposition recipe comprising at least one deposition recipe parameter that corresponds to the at least one deposition variable; c) measuring a film property of at least one of said one or more film properties for the deposited film of step (b) for each of the at least two regions of the wafers wherein each of the two regions is a distinct substantially annular region; (d) calculating an updated deposition model based upon the measured film property of step (c) and the model of step (a); and (e) calculating an updated deposition recipe based upon the updated model of step (d) to maintain a target film property.