Patent ID: 6326631
Filing Date: 2001-12-04
Classification: H01J

Abstract:
An ion implantation device which includes:an ion source for producing a beam (2) of ions to be implanted in a substrate (24),an acceleration electrode for accelerating the ion beam emanating from the ion source,ion-optical elements which are arranged downstream from the acceleration electrode in order to influence the direction of the ion beam, anda deceleration device which is arranged downstream from said ion-optical elements in order to decelerateand deflect the ion beam,characterized in thatthe deceleration device includes at least two successive deceleration stages (4, 6), the first one of the two deceleration stages (4), viewed in the downstream direction, being arranged todecelerate the ion beam,deflect the ion beam, andform an intermediate crossover,and the second deceleration stage (6) being arranged to decelerate the ion beam further and to subject this beam to a converging effect.