Patent ID: 11868057
Assignee: TOKYO ELECTRON LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC G  B  H | IPC B  G

Claim 0:
1. A solution treatment apparatus for applying a coating solution onto a substrate, the solution treatment apparatus comprising:
a holder configured to hold and rotate the substrate;
a coating solution supplier configured to supply the coating solution to the substrate held on the holder; and
an inner cup configured to surround the holder from a lateral side and having a peripheral edge side upper surface inclining down outward in a radial direction from an apex part located below a peripheral edge side of the substrate held on the holder, wherein:
the inner cup has a plurality of discharge ports formed along a circumferential direction at the apex part; and
the discharge ports are formed to discharge a cleaning solution and make the cleaning solution flow down along the peripheral edge side upper surface of the inner cup to which the coating solution adheres, thereby cleaning the peripheral edge side upper surface, and to discharge the cleaning solution outward in the radial direction and obliquely upward, wherein
the inner cup comprises:
a storage chamber provided in a circular shape along the circumferential direction inside the inner cup, communicating with each of the discharge ports, and configured to store the cleaning solution; and
an introduction hole connected to the storage chamber and configured to introduce the cleaning solution to the storage chamber.