Patent ID: 6403491
Filing Date: 2002-06-11
Classification: H01J,H01L

Abstract:
A method of plasma etching features on a dielectric layer on a substrate disposed in a magnetically enhanced thermally controlled plasma etch chamber, comprising:(a) disposing a substrate in a processing region of a thermally controlled plasma etch chamber; (b) controlling the temperature of a wall disposed adjacent to the processing region of the thermally controlled plasma etch chamber to create a low temperature that is conducive to adhesion of polymer by-product on said wall; (c) controlling the temperature of a substrate support; (d) maintaining a pressure in the processing region; (e) flowing a gas composition through a nozzle and into the processing region, said nozzle being at a temperature that is higher than said wall to prevent to adhesion of polymer by-product on said nozzle; (f) coupling RF energy into the processing region to form a plasma from the gas composition; and (g) providing a magnetic field in the processing region and transverse to the substrate.