Patent ID: 7209055
Filing Date: 2007-04-24
Classification: B82Y,H01J

Abstract:
1. An electrostatic deflector for a particle beam apparatus, the electrostatic deflector comprising: (a) first and second deflector plates that face one another across a particle beam gap, the deflector plates being electrostatically chargeable; (b) a first voltage driver comprising a first DAC to convert a first digital code to a first analog voltage signal, and a first amplifier to amplify the first analog voltage signal to generate a first voltage to be applied to the first deflector plate; (c) a second voltage driver comprising a second DAC to convert a second digital code to a second analog voltage signal, and a second amplifier to amplify the second analog voltage signal to generate a second voltage to be applied to the second deflector plate, the second voltage being substantially complementary to the first voltage to maintain a selected differential voltage between the first and second deflector plates; and (d) digital electronics to receive an input digital code that expresses the first and second voltages to be applied to the first and second deflector plates, and substitute the input digital code with an output digital code such that: