Patent ID: 6022460
Filing Date: 2000-02-08
Classification: C23C,H01J

Abstract:
An enhanced inductively coupled plasma reactor, comprising:a chamber for providing a space in which plasma generated is maintained and plasma reaction processes are carried out;a power supply for providing radio-frequencies necessary to generate plasma within the chamber;an antenna for producing electric fields and magnetic fields with a radio-frequency power from the power supply to generate plasma within the chamber, said antenna being in any form;Helmholtz coils for shaking the plasma with intermittent modulation of a weak magnetic field to increase the density of the plasma and enhance the uniformity of the plasma, said Helmholtz coils consisting of two coils which are symmetrically arranged with a common axis, winding around the chamber at an upper position and a lower position, respectively, said weak magnetic field being produced by providing a combination of a direct current and an alternating current to said Helmholtz coils;a wafer stage and support for supporting a target which is treated by the plasma reaction processes and maintaining the temperature of the wafer;a bias RF power supply for controlling ion energies, connected to the wafer stage; anda matching box for optimally controlling and transferring the power from the bias RF power supply.