Patent ID: 8912513
Filing Date: 2014-12-16
Classification: B82Y,H01J

Abstract:
1. A charged particle beam writing apparatus comprising: a laser displacement meter configured to measure a position of a substrate cover by irradiating the substrate cover with laser light and receiving reflected light of the laser light reflected by an end face of the substrate cover, while the substrate cover that covers an entire outer circumferential portion of a substrate to be written from above is not mounted on the substrate; a writing unit configured to write a pattern onto the substrate by using a charged particle beam while the substrate cover is mounted on the substrate; a correction unit configured to correct a relative position between the substrate and the substrate cover while the substrate cover is not mounted on the substrate by shifting of the substrate a misregistration amount calculated from a reference position of the substrate cover relative to a reference position of the substrate, and the position of the substrate cover measured by the laser displacement meter while the substrate cover is not mounted on the substrate; and a substrate cover mounting/removal mechanism unit configured to mount the substrate cover on the substrate after the relative position between the substrate and the substrate cover has been corrected by shifting substrate and to remove the substrate cover from the substrate.