Patent ID: 11859281
Assignee: APPLIED MATERIALS, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 8:
9. An ampoule for dispensing a vapor mixture of a carrier gas and a low vapor pressure precursor used in semiconductor manufacturing, the ampoule comprising:
a container having a bottom wall, sidewalls, and a lid, the container defining a cavity configured to hold the precursor, such that a height (H) of the cavity spans from a lower surface of the lid to a top surface of the bottom wall;
a single inlet port and a single outlet port, both in fluid communication with the cavity;
an inlet plenum located between the inlet port and the cavity;
an outlet plenum located between the outlet port and the cavity, wherein the outlet plenum is closer to a radial center of the container than the inlet plenum;
a plurality of elongate tubular walls containing the precursor arranged to define flow channels including an outermost channel and an innermost channel, each of the elongate walls comprising an ingress opening, the ingress openings being off-set such that not one ingress opening overlaps with another ingress opening; and
a tortuous flow path defined by the inlet port, the flow channels, the ingress openings, and the outlet port through which a carrier gas flows in contact with the precursor, the flow path configured to flow from the outermost channel to the innermost channel to the outlet port.