Patent ID: 7385183

Claim:
An etching apparatus comprising: a plasma generating unit; a grid unit that extracts ions from the plasma generating unit and that emits the ions as an ion beam; reflectors at which the ion beam emitted by the grid unit is incident at an incident angle and undergoes a first collision at a collision angle at which the ions are neutralized as a neutralized beam, and at which the neutralized beam undergoes a second collision at the collision angle that restores the neutralized beam to the incident angle; and a substrate stage that mounts a substrate at which the neutralized beam generated from the reflectors is incident to perform substrate processing, wherein the reflectors include a plurality of reflecting plates disposed in parallel between the grid unit and the substrate, wherein the reflecting plates include a first reflecting plate, at which the first collision occurs, and a second reflecting plate, at which the second collision occurs, and wherein the second reflecting plate is disposed to face the first reflecting plate, and the grid unit and the substrate are disposed to be in parallel with each other.