Patent ID: 8232532
Filing Date: 2012-07-31
Classification: H01J

Abstract:
1. A tool for treating a substrate, comprising: a chamber having an end and a chamber wall; a mechanism for holding a sample within the chamber; an ion source located at the end of the chamber; a first series of magnets spaced about the chamber wall at a first location; a second series of magnets spaced about the chamber wall at a second location, the first location being closer to the ion source than the second location; and circuitry connected with the first and second magnets to control the activation of first and second series of magnets so that the first series of magnets deflects the ion beam outward toward the chamber wall, and the second series of magnets deflects the ion beam inward away from the chamber wall thereby curving the ion beam path that terminates at the sample, the circuitry also being configured to control activation of the magnets within each of the first and second series of magnets to cause the curved ion beam to rotate about an axis that is perpendicular to the sample, such that the ion beam impinges the sample with a rotating angle.