Patent ID: 8378299
Filing Date: 2013-02-19
Classification: H01J

Abstract:
1. A column for a charged particle beam device, said column comprising: a charged particle emitter for emitting a primary charged particle beam as one source of the primary charged particle beam; a biprism adapted for acting on the primary charged particle beam so that two virtual sources are generated; a charged particle beam optics adapted to focus the charged particle beam simultaneously on two positions of a specimen corresponding to images of the two virtual sources; a beam separator for separating the primary charged particle beam and particles selected from the group consisting of secondary particles coming from the specimen, backscattered particles coming from the specimen, and secondary particles and backscattered particles coming from the specimen; and at least one detector for measuring the particles selected from the group consisting of secondary particles coming from the specimen, backscattered particles coming from the specimen, and secondary particles and backscattered particles coming from the specimen.