Patent ID: 8405923

Claim:
A controller of an electron beam recording apparatus for irradiating an electron beam and drawing a concentrically circular pattern on a substrate while the substrate is rotated and translated, the controller comprising: a deflection signal generator for generating a deflection signal for causing said electron beam to deflect and perform overwriting so that a beam spot of said electron beam follows the translation of said substrate over a period during which said substrate is rotated over a predetermined number of overwriting cycles; and a data output unit for outputting drawing data, wherein said deflection signal generator generates a deflection adjustment signal for causing said electron beam to deflect over a predetermined deflection adjustment period to a starting position for drawing of a new pattern to be subsequently overwritten after overwriting of one pattern based on said drawing data has completed, the starting position being further forward in the drawing direction relative to a point on a drawing track of a concentrically circular pattern where the overwriting of said one pattern has completed, and a connection area of a concentric circle of said concentrically circular pattern is set so as to be within a non-drawing zone of said substrate or within an area of said substrate where low precision is permitted.