| 摘要 |
A charged particle beam device for inspecting a specimen includes a charged particle beam source adapted to generate a primary charged particle beam; an objective lens device adapted to direct the primary charged particle beam onto the specimen; a retarding field device adapted to accelerate secondary charged particles starting from the specimen, a first detector device having a central opening, includes at least two azimuthal detector segments for detecting secondary particles, wherein the objective lens device is adapted such that particles with different starting angles from the specimen exhibit crossovers at substantially the same distance from the specimen between the objective lens and the detector device, and an aperture located between the objective lens and the crossovers, having an opening which is equal to or smaller than the central opening in the detector device.
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