Patent ID: 6774378
Filing Date: 2004-08-10
Classification: H05H

Abstract:
A method of tuning a plurality of electrostatic quadrupole of an ion beam implanter, the steps of the method comprising:a) grouping each of the plurality of electrostatic quadrupole into one of a predetermined number of groups based on a primary function of the quadrupole, the predetermined number of groups being at least one less than a number of electrostatic quadrupoles; and b) for each of the groups of quadrupoles, energizing the quadrupoles in the group by iteratively substituting values for a voltage to be applied to each of the quadrupoles in the group using a multi-parameter heuristic algorithm and measuring final beam current measured downstream of the ion accelerator to determine a set of applied voltage values that maximize the final beam current among those applied voltage values tested and utilizing the set of applied voltage values to energize the quadrupoles in the group.