PRECURSOR VAPOR GENERATION AND DELIVERY SYSTEM WITH FILTERS AND FILTER MONITORING SYSTEM

摘要

A vapor delivery system for supplying vapor to a chamber in a plasma-enhanced chemical vapor deposition (PECVD) system includes a vapor supply that supplies vapor by vaporizing at least one liquid precursor in a carrier gas. A first path includes a first filter that filters the vapor flowing from the vapor supply to the chamber. At least one second path is parallel to the first path and includes a second filter that filters vapor flowing from the vapor supply to the chamber. A plurality of valves are configured to switch delivery of the vapor to the chamber between the first path and the second path.