Patent ID: 9455119
Filing Date: 2016-09-27
CPC Classification: H01J

Claim Text:
1. A charged particle beam apparatus comprising: a stage configured to hold a sample and to be movable; a charged particle beam irradiation unit configured to irradiate the sample with a charged particle beam; an image acquiring unit configured to detect secondary electrons generated from the sample due to the irradiation with the charged particle beam and to acquire images of the sample; and a controller configured to control the charged particle beam apparatus and perform operations comprising: an irradiating operation to irradiate a first position of the sample with the charged particle beam while changing a scan range of the charged particle beam such that the scan range of the charged particle beam moves from the first position; a first image acquiring operation to control the image acquiring unit to acquire an image of each portion where the charged particle beam moves; an indicator forming operation to form an indicator at a second position by the charged particle beam when the scan range of the charged particle beam reaches the second position; a second image acquiring operation to control the image acquiring unit to acquire an image of the second position in a state where the indicator is formed; and an adjusting operation to adjust a relative position between the stage and the scan range of the charged particle beam.