Patent ID: 9431214
Filing Date: 2016-08-30
CPC Classification: H01J

Claim Text:
1. An ion implantation apparatus including a scanning unit, the scanning unit comprising: a scanning electrode device that allows a deflecting electric field to act on an ion beam incident along a reference trajectory and scans the ion beam in a horizontal direction perpendicular to the reference trajectory; and an upstream electrode device configured by a plurality of electrode bodies provided upstream of the scanning electrode device, wherein the scanning electrode device includes a pair of scanning electrodes provided to face each other in the horizontal direction with the reference trajectory interposed therebetween, and a pair of beam transport correction electrodes provided to face each other in a vertical direction perpendicular to the horizontal direction with the reference trajectory interposed therebetween, and wherein each of the pair of beam transport correction electrodes includes a beam transport correction inlet electrode body protruding toward the reference trajectory in the vertical direction in the vicinity of an inlet of the scanning electrode device.