Patent ID: 8859962
Filing Date: 2014-10-14
Classification: H01J

Abstract:
1. A charged particle microscope, comprising: a stage holding a sample to be measured; a charged particle optical tube that detects a secondary signal generated by two-dimensional scanning a charged particle beam onto the sample and having an objective lens that focuses the charged particle beam onto the sample and a height measuring device that measures a height of the sample; and a controller configured to control the objective lens, wherein the objective lens is configured by a plurality of lenses including an electromagnetic lens and an electrostatic lens, wherein the controller is configured to calculate a set value of the electromagnetic lens based on an average height of the sample before the stage starts moving the sample to a target observation position for the first time, and wherein the controller is configured to calculate a set value of the electrostatic lens based on a height of the sample at a stop position of the stage after the stage starts moving the sample to the target observation position.