Patent ID: 9611552
Date: 2017-04-04
CPC Classifications: B05B,C23C,C23F,H01J,H01L

Claim:
1. A workpiece processing system, comprising: a chamber comprising a gas inlet and an exhaust port; a heating element in communication with the chamber; a gas storage container containing at least one processing gas; a valve disposed between the gas storage container and the gas inlet; an exhaust pump in communication with the exhaust port; and a controller, in communication with the valve, the exhaust pump and the heating element, wherein the controller: actuates the valve to introduce the at least one processing gas into the chamber at a first temperature; actuates the valve to stop a flow of the at least one processing gas into the chamber; actuates the exhaust pump to exhaust the at least one processing gas from the chamber after a first dwell time while the temperature of the chamber is the first temperature; actuates the heating element to raise a temperature of the chamber to a second temperature after the at least one processing gas has been exhausted; and actuates the exhaust pump while the temperature of the chamber is the second temperature to eliminate a removable compound produced by a chemical reaction between the at least one processing gas and a metal disposed on a surface of a substrate disposed in the chamber, and wherein the first temperature is less than a temperature at which the removable computer sublimes, and the second temperature is greater than the temperature at which the removable compound sublimes.