Patent ID: 8330103

Claim:
A charged particle beam apparatus that emits charged particle beams onto a specimen and utilizes generated secondary charged particle beams, comprising: a charged particle beam generator that generates a plurality of charged particle beams; a primary optics system including at least one lens that makes the plurality of charged particle beams irradiate the specimen and a deflector that deflects the plurality of charged particle beams to scan the specimen; signal detectors that individually detect a plurality of secondary charged particle beams generated from a plurality of locations on the specimen by the irradiation of the plurality of charged particle beams; a secondary optics system that makes the plurality of secondary charged particle beams incident on the signal detectors; a stage onto which the specimen is loaded and which can carry the specimen; a display that displays images based upon outputs of the signal detectors; and a first adjuster that adjusts positions on a surface of the specimen which the plurality of charged particle beams irradiate, wherein a layout of a plurality of reference marks, each of which is corresponding to each of the plurality of charged particle beams, are provided on the stage; and the first adjuster adjusts a position on the specimen, which each of the plurality of charged particle beams irradiates, based upon an image of each of the plurality of reference marks on the stage displayed on the display at a standstill during calibration, and measures a layout of the plurality of charged particle beams on the specimen, and carries out calibration of the plurality of charged particle beams at the same time.