Patent ID: 7601968
Filing Date: 2009-10-13
Classification: B82Y,G03F,H01J

Abstract:
1. A pattern writing method using a charged particle beam, comprising: irradiating a shot of a charged particle beam; and deflecting the charged particle beam of the shot using a first deflector to set a beam-on state and a beam-off state for each shot and using a second deflector to form a variable-shaped beam for each shot, the first and second deflectors being arranged on an optical path of the charged particle beam, so as to write a pattern on a target object, wherein any one of the first and second deflectors controls deflection of a charged particle beam of a shot different from a shot which is controlled in deflection by another deflector in the same period, and a voltage of the second deflector reaches a target voltage for each shot before a charged particle beam for each shot reaches the second deflector.