Patent ID: 6363882
Filing Date: 2002-04-02
Classification: H01J

Abstract:
A plasma processing system for processing a surface of a substrate, comprising;a process chamber within which a plasma is both ignited and sustained for said processing, said process chamber having an upper end and a lower end; an electrode disposed at said lower end of said process chamber, said electrode being configured for generating an electric field inside said process chamber; a chuck disposed above said electrode, said chuck being configured for holding said substrate during said processing; an edge ring disposed above said electrode, said edge ring being configured for shielding said electrode and said chuck from said plasma, said edge ring having a first portion configured to be disposed between said electrode and said substrate when said substrate is held by said chuck; and an impedance matching layer disposed between said electrode and said edge ring, said impedance matching layer being bonded to said electrode or said edge ring, said impedance matching layer having characteristics or features configured for controlling an impedance between said electrode and said plasma, said impedance being arranged to affect said electric field to improve processing uniformity across the surface of said substrate.