Patent ID: 8181597
Filing Date: 2012-05-22
Classification: H01J

Abstract:
1. A plasma generating apparatus comprising: a vacuum chamber having a hollow interior and sealed at its top by a vacuum plate that has a through-hole at its center; an Electrostatic Chuck (ESC) disposed at an internal center of the vacuum chamber, receiving an external bias Radio Frequency (RF), and placing a substrate thereon; an antenna unit disposed within the vacuum chamber under the vacuum plate; an antenna cover covering and coupled to a top of the antenna unit, exposed to the exterior through the through-hole of the vacuum plate, having a gas inlet at its outer periphery, and receiving and forwarding an external source RF to the antenna unit; a cover holder caught by an upper surface of the vacuum plate with being coupled with the antenna cover, and suspending and holding the antenna unit, wherein the antenna unit has a coupling structure of a plate shape antenna and a coil shape antenna, wherein the plate shape antenna generates plasma by capacitive coupling that forms an electric field with the ESC, and wherein the coil shape antenna generates plasma by inductive coupling that applies a magnetic field and forms an inductive electric field within the vacuum chamber; and an impedance controller provided in a predetermined part of the coil shape antenna, wherein the impedance controller comprises: an isolation part for isolating cut surfaces of the coil shape antenna, which are obtained by cutting away a predetermined part of the coil shape antenna by a predetermined length, from each other at regular intervals; a resonance circuit connecting with each of the cut surfaces of the coil shape antenna that are isolated from each other by the isolation part; and a protection box for protecting the resonance circuit.