Patent ID: 9263232
Filing Date: 2016-02-16
CPC Classification: H01J

Claim Text:
1. A charged particle beam device comprising: a charged particle optical lens barrel accommodating a charged particle source and electron lenses including an objective lens; a support housing equipped with the charged particle optical lens barrel on an upper side thereof and having an opening part at a lateral side thereof; an insertion housing having a lateral opening part at a lateral side thereof and an upper opening part at an upper side thereof, and being inserted in the support housing so that the opening part of the insertion housing is positioned in a same direction as the opening part of the support housing to face each other, to thereby close the opening part of the support housing, and wherein the upper opening part is arranged at an irradiation area to which a primary charged particle beam is irradiated in a state that the insertion housing is inserted in the support housing; a first aperture member having a small aperture at a central part thereof and disposed in a vicinity of a center of a magnetic field of the objective lens in the charged particle optical lens barrel so as to substantially isolate a space accommodating the charged particle source; a second aperture member having a small aperture at a central part thereof and disposed so as to substantially close the upper opening part of the insertion housing; and a detector that detects secondary charged particles emitted from a sample when the primary charged particle beam emitted from the charged particle source passes through the small aperture of the first aperture member and the small aperture of the second aperture member and is irradiated to the sample arranged in contact with or arranged in close vicinity to a lower side of the second aperture member.