Patent ID: 7789992
Filing Date: 2010-09-07
Classification: H01J

Abstract:
1. A neutral beam etching device comprising: a first chamber having a first opening formed at one side thereof; a second chamber having a second opening formed at one side thereof and being disposed inside the first chamber to form a plasma generation area; a first channel formed between an inside surface of the first chamber and an outer surface of the second chamber and fluidly communicating the first opening with the plasma generation area; a second channel formed in the second chamber and fluidly communicating the second opening with the plasma generation area and partitioned from the first channel by a wall of the second chamber; a coil which is disposed on an outer surface of the first chamber and which generates a magnetic field to generate a plasma in the plasma generation area; and an acceleration part comprising a first grid charged with a first polarity and a second grid charged with a second polarity which is different from the first polarity, wherein the first grid is disposed in the first channel and accelerates and discharges one of positive ions and electrons of the plasma through the first channel, and the second grid is disposed in the second channel and accelerates and discharges the other one of the positive ions and the electrons through the second channel, wherein the first and the second grids are separated by the wall of the second chamber; and wherein the positive ions and the electrons are discharged towards a wafer to etch a predetermined area on the wafer.