Patent ID: 9496120
Filing Date: 2016-11-15
CPC Classification: C23C,H01J,H01L

Claim Text:
1. An ion implantation system, comprising: an ion source, wherein the ion source outputs an ion beam having a plurality of ions that propagate along a beam line; a mass analyzer, wherein the mass analyzer generates a magnetic field, wherein the mass analyzer is positioned with respect to the ion beam outputted by the ion source such that the magnetic field bends a trajectory of each of the ions within the ion beam outputted from the ion source such that ions having a lower mass to charge ratio are bent more than ions having a higher mass to charge ratio, wherein the trajectory of each of the ions lies in a corresponding plane; and a mass resolving aperture, wherein the mass resolving aperture has an opening; wherein the mass resolving aperture is positioned such that a first portion of ions of the plurality of ions in the ion beam outputted from the mass analyzer as the ion beam approaches the mass resolving aperture passes through the opening and are in the ion beam after the ion beam exits the mass resolving aperture and the mass resolving aperture alters a motion of a second portion of ions of the plurality of ions in the ion beam as the ion beam approaches the mass resolving aperture such that the second portion of the ions of the plurality of ions are not in the ion beam after the ion beam exits the mass resolving aperture, wherein the mass resolving aperture has an edge adjacent the opening, wherein the edge has a face surface and a side surface, wherein a normal to the face surface is parallel with the beam line of the ion beam outputted from the mass analyzer as the ion beam approaches the mass resolving aperture and in a direction opposite to the direction the ion beam propagates and a normal to the side surface is perpendicular to the beam line of the ion beam outputted from the mass analyzer as the ion beam approaches the mass resolving aperture, wherein at least a portion of the mass resolving aperture adjacent the face surface is segmented such that a first segment of the at least a portion of the mass resolving aperture adjacent the face surface has a different electric charge and/or a different magnetic polarity than a second segment of the at least a portion of the mass resolving aperture.