Patent ID: 8785849
Filing Date: 2014-07-22
Classification: H01J

Abstract:
1. Focused ion beam system at least adapted for one of CD-measurements or DR-measurements of a specimen, comprising: a gas field ion source, the gas field ion source having an emitter tip; the emitter tip having a base tip comprising a first material and a supertip comprising a material different from the first material, wherein the supertip is a single atom tip for emitting an ion beam; wherein the base tip is a single crystal base tip; a detector for detection of at least one of the group consisting of backscattered and secondary particles released from the specimen; an analyzer for performing at least one of the group consisting of analyzing, evaluating, and classifying structures on the specimen and being connected to the detector; and a probe current control device comprising a current measurement device and having a control loop adapted to trigger a probe current control action.