Patent ID: 8715472
Filing Date: 2014-05-06
Classification: C23F,H01J

Abstract:
1. A substrate processing method, comprising: forming a first plasma; extracting preliminary ions from the first plasma and accelerating the preliminary ions to have uniform or substantially uniform directivity using a grid system; irradiating the preliminary ions at a reflector, wherein the reflector comprises a plurality of reflecting plates each having a metal plate and an insulating layer stacked on the metal plate, wherein the reflecting plates are parallel or substantially parallel such that the insulating layers are exposed to the preliminary ions; colliding the preliminary ions with the reflecting plates so that a charge build-up occurs on the insulating layers, wherein the polarity of the charge build-up is the same as a polarity of the preliminary ions; forming a second plasma; extracting and accelerating process ions from the second plasma using the grid system; emitting the process ions at the reflector; reflecting the process ions incident on the reflecting plates away from the insulating layers of the reflecting plates without substantial collision; colliding the process ions reflected away from the insulating layers with the metal plates to convert the process ions into neutral beams; reflecting the neutral beams to have substantially a same directivity; and irradiating the neutral beams onto a substrate to process the substrate.