Electron Beam Apparatus
AssigneeHitachi High-Tech Corporation
InventorYu YAMAZAWA
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AssigneeHitachi High-Tech Corporation
InventorYu YAMAZAWA
Estimating the term…
In an electron beam apparatus performing angular scanning that changes an incident angle of an electron beam incident at a predetermined incident position on a sample, when a correction coil is provided in a gap portion of a yoke (magnetic path) of an objective lens, spherical aberration can be corrected by following a deflection signal even if a deflection frequency increases. Therefore, a main control unit that controls an electron optical system sets predetermined phase change amounts a, b with respect to control of a scanning coil in control of the correction coil, and the predetermined phase change amounts a, b are made different depending on a plurality of scanning modes having different scanning speeds.
An electron beam apparatus configured to perform angular scanning that changes an incident angle of an electron beam incident at a predetermined incident position on a sample, and having a plurality of scanning modes having different scanning speeds of the angular scanning, the electron beam apparatus comprising:
Dependencies are inferred from the claim text.