A method for vaporizing particulate material and depositing it onto a
surface to form a layer, includes providing a supply of particulate
material in a replenishment container, the replenishment container having
a sealed interface fitting; mounting the replenishment container to a
supply hopper defining at least one feed opening, and breaking the seal
at the interface fitting; transferring particulate material from the
replenishment container to the supply hopper; and transferring such
particulate material through the feed opening along a feeding path to a
vaporization zone where at least a component portion of the particulate
material is vaporized and delivered to the surface to form the layer.