Patent ID: 8653472

Claim:
An electromagnetic field application system to a specimen for observation or fabrication to be used in the charged particle beam instrument, with a specimen placed on the optical axis of the charged particle beam, the magnetic field being applied in a specific direction in a specific region containing a plane perpendicular to the optical axis and the plane holding the specimen thereon, and the electric field being applied in a specific direction in a specific region containing a plane perpendicular to the optical axis and the plane holding the specimen, and being applied to at least one part in the region in which the magnetic field is applied, wherein the electric field is generated by at least two set of parallel-plate electrode-pair having the same axis of electric field and composed of at least two plate-electrodes which are arranged at both sides of the specimen in the plane at which the specimen is positioned and opposite to the optical axis, wherein the parallel plate-electrodes are surrounded by magnetic shields in the plane holding the specimen, and are placed at least two positions a certain distance away from the optical axis.