Patent ID: 8373144
Filing Date: 2013-02-12
Classification: B82Y,G21K,H01J

Abstract:
1. An electron-beam apparatus for writing a pattern on a target substrate, the apparatus comprising: a plurality of arrays of actively-controlled pixel elements at a surface of a reflective electron patterning device; an electron source for generating an incident electron beam; an objective lens for focusing the incident electron beam onto the surface of the reflective electron patterning device; circuitry to control the actively-controlled pixel elements of each said array to selectively reflect pixel portions of the incident beam to form a patterned beam; and a projector for projecting the patterned beam onto a surface of the target substrate, wherein the plurality of arrays of actively-controlled pixel elements are arranged so that there is an area without any actively-controlled pixel elements in a region surrounding an optical axis of the objective lens.