Patent ID: 11908680
Assignee: TOKYO ELECTRON LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A substrate processing method, comprising:
partially etching a metal polycrystalline film at a peripheral portion of a substrate in a thickness direction by supplying an etching liquid to the peripheral portion while rotating the substrate having the metal polycrystalline film formed on a front surface thereof;
washing away an etching residue generated in the partially etching of the metal polycrystalline film with a rinse liquid by supplying the rinse liquid to a portion of the substrate closer to a center side of the substrate than a supply position of the etching liquid in the partially etching of the metal polycrystalline film while rotating the substrate;
etching a remaining portion of the metal polycrystalline film at the peripheral portion of the substrate by supplying the etching liquid to the peripheral portion while rotating the substrate;
washing away an etching residue generated in the etching of the remaining portion of the metal polycrystalline film with the rinse liquid by supplying the rinse liquid to a portion of the substrate closer to the center side of the substrate than a supply position of the etching liquid in the etching of the remaining portion of the metal polycrystalline film while rotating the substrate; and
drying the substrate after the washing away of the etching residue generated in the etching of the remaining portion of the metal polycrystalline film,
wherein the washing away of the etching residue generated in the partially etching of the metal polycrystalline film includes starting the supplying of the rinse liquid during the supplying of the etching liquid in the partially etching of the metal polycrystalline film,
wherein the washing away of the etching residue generated in the etching of the remaining portion of the metal polycrystalline film includes starting the supplying of the rinse liquid during the supplying of the etching liquid in the etching of the remaining portion of the metal polycrystalline film,
wherein the washing away of the etching residue generated in the partially etching of the metal polycrystalline film or the washing away of the etching residue generated in the etching of the remaining portion of the metal polycrystalline film includes, while discharging the rinse liquid from a nozzle, moving the nozzle from an outside of the substrate toward the center side of the substrate beyond an edge of the substrate and increasing a flow rate of the rinse liquid discharged from the nozzle after the nozzle crosses the edge of the substrate.