A high conductance, multi-tray film precursor evaporation system coupled with a high conductance vapor delivery system is described for increasing the deposition rate by increasing exposed surface area of film precursor. The multi-tray film precursor evaporation system includes one or more trays. Each tray is configured to support and retain film precursor in, for example, solid powder form or solid tablet form. Additionally, each tray is configured to provide for a high conductance flow of carrier gas over the film precursor while the film precursor is heated. For example, the carrier gas flows inward over the film precursor, and vertically upward through a flow channel within the stackable trays and through an outlet in the solid precursor evaporation system.