Patent ID: 6716302
Filing Date: 2004-04-06
Classification: H01J,H01L

Abstract:
A capacitively coupled reactor for plasma etch processing of substrates at subatmospheric pressures, comprising:(a) a chamber body defining a processing volume; (b) a lid provided upon said chamber body, said lid comprising a first electrode; (c) a substrate support provided in said processing volume and comprising a second electrode; (d) a radio frequency source coupled at least to one of said first and second electrodes for capacitively coupling RF plasma source power into said chamber; (e) a process gas inlet configured to deliver process gas comprising hexafluoro-1, 3-Butadiene gas into said processing volume; (f) a process gas outlet; and, (g) an evacuation pump system including a pump having pumping capacity of at least 1600 liters/second, and a controller connected to said pump, said evacuation pump system being configured to continuously exhaust said processing volume at a rate of at least 48 processing volumes per second whereby to limit a residency in said processing volume of said process gas to less than 70 milliseconds so as to enhance etch selectivity.