Patent ID: 8431915

Claim:
A charged particle beam apparatus, comprising: a charged particle gun that emits a primary charged particle beam for irradiating a sample; a stage for placing the sample thereon; an objective lens having an opening for allowing the primary charged particle beam to pass therethrough, the objective lens including: a first magnetic pole member that is disposed around the opening and to which a positive voltage is applied, the first magnetic pole member having a terminal portion at a sample side thereof that functions as an upper magnetic pole member of the objective lens; a second magnetic pole member that supplies a magnetic flux to the first magnetic pole member and is formed with a hollowed interior; a coil that is disposed within the second magnetic pole member and that supplies a magnetic flux to the second magnetic pole member; and a third magnetic pole member in which the opening is formed, the third magnetic pole member being disposed between the stage and the second magnetic pole member, the third magnetic pole member functioning as a lower magnetic pole member of the objective lens; a detector that is disposed above the first magnetic pole member and detects a secondary charged particle released from the sample or a tertiary charged particle that is emitted as a result of the secondary charged particle; and an image output unit for outputting a top-view image based on a detection result of the detector.