Patent ID: 8933422
Filing Date: 2015-01-13
Classification: H01J

Abstract:
1. A charged particle beam device comprising: a charged particle source; a specimen stage that maintains a specimen on which a charged particle beam emitted from the charged particle source is irradiated; a specimen chamber that sets an atmosphere in which the specimen exists as a vacuum state; and an exchange chamber that evacuates a specimen atmosphere to be introduced to the specimen chamber, the charged particle beam device further comprising a partition that is located between a charged particle source-side vacuum space and a specimen stage-side vacuum space, the partition further including an opening for the charged particle beam to pass through, a drive mechanism that moves a shutter member capable of separating the charged particle source-side vacuum space and the specimen stage-side vacuum space by pressing the partition between a first location within an optical axis of the charged particle beam and a second location outside the optical axis of the charged particle beam, and a control device that controls the drive mechanism, wherein the first location is a location wherein the shutter member is distant from the partition, and the control device carries out control for opening a valve between the specimen chamber and the exchange chamber while keeping the shutter member in a state of being located in the first location.