Patent ID: 7176471
Filing Date: 2007-02-13
Classification: B82Y,G11B,G21K,H01J

Abstract:
1. An electron beam exposure method in which an article subjected to exposure and an electron beam irradiation spot are moved relative to each other at a continuous speed; wherein the article is exposed at a plurality of irradiation intensities of an electron beam by changing a transmittance of an electron optical system for forming the electron beam irradiation spot on the article, the transmittance of the electron optical system is changed by changing a state of hitting of a blanking mask by the electron beam, the state of hitting of the blanking mask by the electron beam is changed by controlling a state of deflection of the electron beam by a blanking deflector, the state of deflection of the electron beam by the blanking deflector includes a first deflection state in which the electron beam is deflected in a first direction by the blanking deflector such that a whole of the electron beam hits the blanking mask, a second deflection state in which the electron beam is deflected in a second direction by the blanking deflector such that the electron beam does not hit the blanking mask at all and a third deflection state in which the electron beam is not deflected by the blanking deflector such that a portion of the electron beam hits the blanking mask.