Patent ID: 7777206

Claim:
A control method of an ion implantation device that radiates an ion beam emitted from an ion source via an optical element onto a material to be treated, comprising the steps of: measuring a spatial distribution of the ion beam in the vicinity of the material to be treated; estimating an emittance, which is a spatial and angular distribution of the ion beam of the ion source, from the measured spatial distribution, by using an ion beam trajectory calculation method; calculating operating conditions of the optical element so that the ion beam in the vicinity of the material to be treated has a desired spatial distribution, by using the estimated emittance and the trajectory calculation method; and operating the ion implantation device by using the calculated operating conditions of the optical element wherein the trajectory calculation method is a calculation method using Kapchinskij and Vladimirskij equations in which the emittance is assumed to be an elliptical surface in a four-dimensional space.