Patent ID: 9330881
Filing Date: 2016-05-03
CPC Classification: H01J

Claim Text:
1. A blanking device for multi charged particle beams comprising: a substrate in which there are formed a plurality of openings through each of which a corresponding beam of multi-beams passes; a dielectric film formed on the substrate; a plurality of first electrodes, located at an upper side of the dielectric film and arranged at positions each exposed in a corresponding opening of the plurality of openings, each configured to be applied with a first deflection potential for blanking deflection of the corresponding beam of the multi-beams; a plurality of second electrodes, located at the upper side of the dielectric film and arranged at positions each opposite to a corresponding first electrode of the plurality of first electrodes with respect to the corresponding opening of the plurality of openings, each configured to be applied with a second deflection potential, including a ground potential, for deflecting the corresponding beam of the multi-beams by a potential difference between the first deflection potential and the second deflection potential; and a conductive film arranged in, other than a plurality of first regions on the dielectric film each along a corresponding first electrode of the plurality of first electrodes and being shaded by the each of the plurality of first electrodes in a case of being viewed from a position where the corresponding beam passes through the corresponding opening of the plurality of openings, a second region on the dielectric film, wherein insulation is provided between the each of the plurality of first electrodes and the plurality of second electrodes by combination of the dielectric film and the corresponding opening.