Patent ID: 11915902
Assignee: NUFLARE TECHNOLOGY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A conduction inspection apparatus for a multipole aberration corrector comprising:
an emission source configured to emit an inspection charged particle beam;
a focusing mechanism configured to control a focus position of the inspection charged particle beam;
a deflector configured to deflect the inspection charged particle beam in order to control an irradiation position of the inspection charged particle beam;
a stage on which there are disposed
a multipole aberration corrector which includes an upper-stage substrate where a first opening is formed and a shield electrode is arranged around the first opening, a middle-stage substrate where a second opening is formed, a plurality of control electrodes are disposed to be opposite each other across the second opening, and a plurality of wirings are arranged to be individually connected to one of the plurality of control electrodes which are different from each other, and a lower-stage substrate where a third opening is formed and a shield electrode is arranged around the third opening, and which corrects aberration of a correction charged particle beam passing through the first opening, the second opening, and the third opening by individually variably applying a potential to each of the plurality of control electrodes, and
an object disposed at a downstream side of the lower-stage substrate and irradiated with the inspection charged particle beam having passed through the first opening, the second opening, and the third opening, and

at least one inflow electron dosimeter connected to the plurality of wirings, wherein
it is determined individually, for each control electrode, whether there is conduction between a control electrode concerned and a wiring connected to the control electrode concerned, based on a result of measuring by the at least one inflow electron dosimeter, via a wiring individually connected to the each control electrode in the plurality of wirings, an inflow electron dose of an electron, into the each control electrode of the plurality of control electrodes, which is secondarily emitted because the inspection charged particle beam has passed through the first opening, the second opening, and the third opening and has irradiated an object disposed at a downstream side of the lower-stage substrate.