Patent ID: 9673019
Date: 2017-06-06
CPC Classifications: H01J

Claim:
1. An electron detection system for detecting secondary electrons emitted from a sample irradiated by a Focused Ion Beam (FIB), the FIB emanating from a FIB column and traveling along a beam axis within a beam region, which extends from a pole piece of the FIB column to the sample, comprising: an electron detector configured for detecting the secondary electrons, the electron detector positioned at a lateral distance away from the FIB column; and a deflecting field configured to deflect a trajectory of the secondary electrons, which were propagating towards the FIB column, to propel away from the beam axis and towards the electron detector, the deflecting field being configured to divert the trajectory of secondary electrons while the secondary electrons are generally within the beam region, wherein the deflecting field is generated within the beam region.