Patent ID: 6953047

Claim:
An apparatus for storing and delivering a low vapor pressure process chemical to a process tool for semiconductor fabrication, comprising: a) a bulk container for storing said low vapor pressure process chemical; b) a process container for delivering said low vapor pressure process chemical to said process tool; c) a first manifold for resupplying said low vapor pressure process chemical from said bulk container to said process container through one or more diaphragm valves having the valve seat side of the valve directed to the portion of the manifold which can be disconnected from the bulk container; d) a solvent container containing a quantity of solvent for the low vapor pressure process chemical and connected in fluid flow with said first manifold; e) a second manifold for delivering said low vapor pressure process chemical from said process container to said process tool through one or more diaphragm valves having the valve seat side of the valve directed to the portion of the manifold which can be disconnected from the first manifold; f) a source of vacuum; g) a source of pressurized inert gas; h) a controller for controlling the flow of process chemical from said bulk container and from said process container and the flow of solvent from said solvent container and for cycling the first and second manifolds through a cleaning cycle of a series of applications of vacuum, pressurizing gas and solvent to clean said manifolds.