Patent ID: 11885018
Assignee: LEHIGH UNIVERSITY
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 20:
21. A method for forming a film on a substrate, the method comprising:
translating the substrate in a circular path through a material deposition apparatus;
consecutively exposing the wafer to two or more process chambers of the apparatus each containing source gases with one or more volatile reactive species;
forming a boundary layer adjacent to the substrate beneath the process chambers; and
mixing the source gases from each process chamber in the boundary layer;
wherein a thickness of the boundary layer is controlled by a plurality of separating barriers which isolates each of the process chambers from every other process chamber;
wherein the separating barriers each comprise a bottom edge which is spaced apart from a top surface of a heated susceptor supporting the substrate by a vertical separation distance, the separation distance setting a thickness of the boundary layer;
wherein a film gradually grows in thickness on the substrate with each successive pass and exposure of the substrate to the one or more volatile reactive species from each of the process chambers.