Patent ID: 8450680
Filing Date: 2013-05-28
Classification: H01J

Abstract:
1. A substrate processing method comprising: loading a substrate on a substrate support within a process chamber; forming an ion source in a region within the process chamber, the region being separated from the substrate support; extracting and accelerating ions from the ion source using an ion extraction device between the ion source and the substrate; converting the extracted and accelerated ions into neutralized beams using an ion neutralizing device between the substrate and the ion extraction device, wherein a remaining portion of the ions extracted and accelerated from the ion extraction device is not converted into the neutralized beams; and applying a voltage to the substrate support with a substrate power supply such that the remaining portion of the ions that is not converted into the neutralized beams is directed away from the substrate support by the applied voltage of the substrate, wherein the ion extraction device includes a first grid unit adjacent to the ion source and a second grid unit positioned opposite to the ion source with the first grid unit interposed therebetween, and the first and second grid units have through-holes which communicate with each other; wherein the ions have a polarity associated therewith, and wherein extracting and accelerating the ions includes: applying a first voltage having a polarity that is the same as the polarity of the ions to the first grid unit; and applying a second voltage having a polarity that is different from the polarity of the ions to the second grid unit.