Patent ID: 6909930

Claim:
A system for monitoring a semiconductor device manufacturing process, comprising: image acquiring means for acquiring an electron beam image of a pattern produced on the surface of a substrate by irradiating the substrate, on whose surface the pattern was produced by being subjected to a predetermined treatment process, with the electron beam by scanning; calculation means for calculating feature quantities of said pattern from the electron beam image of said pattern obtained by said image acquiring means; storage means for storing a reference database that describes a relationship between processing condition parameters in said predetermined treatment process and the feature quantifies of the pattern produced on the substrate by the substrate being subjected to said predetermined treatment process; and monitoring means for monitoring a state of said predetermined treatment process by referring to both the feature quantities of the electron beam image of said pattern calculated by said calculation means for calculating the feature quantities and the relationship between the processing condition parameters and the feature quantities of the pattern described in the reference database stored in said storage means.