Patent ID: 7411148
Filing Date: 2008-08-12
Classification: H01J,H05H

Abstract:
1. A plasma generation apparatus, comprising: a chamber having a chamber lid and defining an airtight reaction region for generating a plasma; a susceptor in the chamber; a gas supply means supplying a process gas to the chamber; and a toroidal core vertically disposed with respect to the susceptor through the chamber lid, comprising: a toroidal ferromagnetic core combined with the chamber, the toroidal ferromagnetic core having a first portion outside the chamber and a second portion inside the chamber, the second portion having an opening portion; a radio frequency (RF) power supply connected to the chamber; a phase shifter connected to the RF power supply; an induction coil electrically connected to the RF power supply, the induction coil rolling the first portion; and a matching circuit matching an impedance between the RF power supply and the induction coil, wherein the plasma generation apparatus has at lease two toroidal ferromagnetic cores and the RF power supply independently corresponding to each of the at least two toroidal ferromagnetic cores.