Patent ID: 8653459
Filing Date: 2014-02-18
Classification: H01J,H01L

Abstract:
1. A method of setting an application voltage for an electrostatic chuck provided on a sample stage of a scanning electron microscope, the method comprising: a testing sample mounting step of mounting on the electrostatic chuck a testing sample whose degree of warp and pattern of warp are known; a step of detecting an attraction state of the testing sample with respect to the electrostatic chuck while increasing the application voltage for the electrostatic chuck; an application voltage storage step of storing a critical application voltage at which the attraction state of the testing sample changed from “bad” to “good”; an inspection target sample measuring step of measuring a flatness of an inspection target sample before the inspection target sample is transported into a processing chamber of the scanning electron microscope; a step of detecting a degree of warp and pattern of warp of the inspection target sample from the flatness of the inspection target sample; an application voltage setting step of setting the application voltage for the electrostatic chuck based on the degree of warp and pattern of warp of the inspection target sample and the critical application voltage stored in the application voltage storage step; and an application voltage step in which the inspection target sample is transported into the processing chamber of the scanning electron microscope and mounted on the electrostatic chuck, and in which the application voltage that has been set in the application voltage setting step is applied.