Patent ID: 8791422
Filing Date: 2014-07-29
Classification: B82Y,G21K,H01J

Abstract:
1. A charged particle beam writing apparatus comprising: a stage on which a sample can be mounted; an irradiation unit which emits a charged particle beam to be irradiated on the sample; an aperture plate which includes a first opening portion to shape the charged particle beam; and an objective lens provided between the stage and the aperture plate, wherein the aperture plate has a stacked structure of a first member and a second member, the second member being stacked on and adhered to the first member, position of an end portion of the first opening portion in the second member is recessed from the position of an end portion of the first opening portion in the first member by between 0.5 μm and 5 μm, and a portion of the first member protruding into the first opening portion and having no portion of the second member stacked thereon has a substantially uniform thickness.