| 摘要 |
An ion beam uniformity detector (300) of the present invention includes a number of horizontal rods (302) and a number of vertical rods (301) placed on parallel planes and separated by a selected distance. Crossover measurement points are defined by intersections of the horizontal and vertical rods. By selectively and sequentially applying a pulse to the vertical rods and concurrently biasing horizontal rods, measurements can be obtained for the crossover measurement points, which can then be employed to determine ion beam shape and ion beam intensity at the crossover measurement points. Based on these measurements, adjustments can be made to a continuing ion implantation process in order to increase uniformity with respect to intensity as well as to provide a desired beam shape. Additionally, pairs of vertical and horizontal rods can be employed to also obtain measurements that indicate angle of incidence in two dimensions at the various crossover points.
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