Patent ID: 9281161
Filing Date: 2016-03-08
CPC Classification: H01J

Claim Text:
1. An electron beam writing apparatus comprising: an electron gun assembly that emits an electron beam so as to perform pattern writing on a sample; a first aperture plate that shapes the electron beam; a second aperture plate onto which the electron beam of an aperture plate image passing through the first aperture plate is projected; and a first shaping deflector and a second shaping deflector which are provided between the first aperture plate and the second aperture plate, respectively, deflect the electron beam, control an irradiation position of the aperture plate image on the second aperture plate, and determine a shape and a shot size of the electron beam that passes through the second aperture plate, wherein the first shaping deflector deflects an electron beam such that the aperture plate image is positioned at a determined position in accordance with a shape and a shot size of an electron beam with which the sample is irradiated, and wherein the second shaping deflector deflects an electron beam deflected by the first shaping deflector and controls formation of a desirable shot size.