Patent ID: 6874443

Claim:
A layer-by-layer etching apparatus using a neutral beam, the layer-by-layer etching apparatus comprising: a reaction chamber having a stage therein on which a substrate to be etched is mounted; a neutral beam generator, including: an ion source for extracting an ion beam having a predetermined polarity form a source gas and for accelerating the ion beam; and a plate-shape reflector which is positioned in a path of the accelerated ion beam and is tiltable to control an incident angle of the accelerated ion beam in a range of 75 to 85 degree from a vertical line with respect to a surface of the reflector, whereby the reflector reflects and neutralizes the accelerated ion beam to generate a neutral beam and to supply the neutral beam into the reaction chamber; a shutter disposed between the neutral beam generator and the reaction chamber, for controlling the supply of the neutral beam into the reaction chamber; an etching gas supply for supplying an etching gas into the reaction chamber; a purge gas supply for supplying a purge gas into the reaction chamber; and a controller for controlling the supply of the source gas, the etching gas, and the purge gas and opening and closing the shutter.