Patent ID: 6217659
Filing Date: 2001-04-17
Classification: B01F,F17C,Y02E

Abstract:
A dynamic blending gas delivery system for supplying a blended gaseous mixture to a distribution header from which the blended gaseous mixture is delivered to at least one process tool, comprising:means for supplying a first fluid;means for heating the first fluid to a temperature where at least some portion of the first fluid is a vapor;means for superheating the vapor portion of the first fluid to a temperature sufficient to avoid condensation of the blended gaseous mixture delivered to the at least one tool;means for supplying a second fluid;means for heating the second fluid to a temperature sufficient to avoid condensation of the superheated vapor portion of the first fluid when the superheated vapor portion comes in contact with the second fluid;means for combining the heated second fluid and the superheated vapor portion of the first fluid to form a blended gaseous mixture having desired physical and chemical properties for the process tool;a storage buffer upstream of the distribution header;means for delivering the blended gaseous mixture to the storage buffer prior to delivering the blended gaseous mixture to the header; andmeans for delivering the blended gaseous mixture to the distribution header from which the blended gaseous mixture is delivered to the at least one process tool.