Patent ID: 8089042
Filing Date: 2012-01-03
Classification: H01J

Abstract:
1. A substrate processing apparatus comprising: an ion source generating device configured to form an ion source; an ion extraction device configured to extract and accelerate ions from the ion source; an ion neutralizing device configured to convert the ions extracted and accelerated from the ion extraction device into neutralized beams, wherein a remaining portion of the ions extracted and accelerated from the ion extraction device is not converted into the neutralized beams; a substrate support configured to support a substrate such that the neutralized beams are directed towards the substrate support; and a substrate power supply configured to apply a voltage to the substrate support 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 formed by the ion source generating device and a second grid unit positioned opposite to the ion source with the first grid unit interposed therebetween, and wherein the ion extraction device further includes a third grid unit that is grounded and positioned opposite to the first grid unit with the second grid unit interposed therebetween, and the first, second and third grid units have through-holes in communication with each other.