Patent ID: 9627171
Date: 2017-04-18
CPC Classifications: H01J

Claim:
1. A charged particle beam device, comprising: a first deflector which deflects a primary charged particle beam emitted from a charged particle source, so as to change a position of scanning area of the primary charged particle beam; a detector which detects charged particles emitted from a sample in response to the primary charged particle beam; a first orthogonal electromagnetic field generator which deflects the charged particles of emitted from the sample to an optical axis of the primary charged particle beam according to a deflection signal from the first deflector, when the first primary charged particle beam is deflected by the first deflector to a different position from the optical axis on the sample; an aperture forming member which is disposed between the first orthogonal electromagnetic field generator and the charged particle source and has a pass-through aperture for the optical axis of the primary charged particle beam; a second orthogonal electromagnetic field generator which deflects the charged particles emitted from the sample deflected by the first orthogonal electromagnetic field generator according to the deflection signal, so that the charged particles emitted from the sample deflected by the first orthogonal electromagnetic field generator travel along the optical axis of the first charged particle beam; and a third orthogonal electromagnetic field generator which deflects the charged particles emitted from the sample passing through the aperture forming member from the optical axis to the detector or a conversion member converting the charged particles into secondary electrons.