Patent ID: 9530616
Filing Date: 2016-12-27
CPC Classification: H01J

Claim Text:
1. A blanking aperture array for a charged particle beam writing apparatus, the blanking aperture array comprising: a substrate including an upper surface on which an insulating film is provided; a plurality of blanking aperture portions provided in the substrate, each of the plurality of blanking aperture portions including one of penetration holes, through which a predetermined beam passes, and one of blanking electrodes and one of ground electrodes which are provided on the insulating film, and the blanking electrodes and the ground electrodes configured to perform blanking deflection of the predetermined beam; and a high-resistivity film provided so as to cover the insulating film and at least part of the ground electrodes, the high-resistivity film having an electric resistance that is higher than an electric resistance of the ground electrodes and lower than an electric resistance of the insulating film.