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

Claim 11:
12. A substrate processing apparatus, comprising:
a rotating/holding device configured to hold and rotate a substrate having a metal polycrystalline film formed on a front surface thereof;
a chemical liquid supply configured to supply an etching liquid to the front surface of the substrate;
a rinse liquid supply configured to supply a rinse liquid to the front surface of the substrate; and
a controller,
wherein the controller is configured to perform a first processing of partially etching the metal polycrystalline film at a peripheral portion of the substrate in a thickness direction by controlling the chemical liquid supply to supply the etching liquid to the peripheral portion while controlling the rotating/holding device to hold and rotate the substrate,
the controller is also configured to perform a second processing of washing away an etching residue generated in the first processing with a rinse liquid by controlling the rinse liquid supply to supply 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 first processing while controlling the rotating/holding device to hold and rotate the substrate,
the controller is also configured to perform a third processing of etching a remaining portion of the metal polycrystalline film at the peripheral portion of the substrate by controlling the chemical liquid supply to supply the etching liquid to the peripheral portion while controlling the rotating/holding device to hold and rotate the substrate,
the controller is also configured to perform a fourth processing of washing away an etching residue generated in the third processing by controlling the rinse liquid supply to supply 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 third processing while controlling the rotating/holding device to hold and rotate the substrate, and
the controller is also configured to perform a fifth processing of drying the substrate by controlling the rotating/holding device to hold and rotate the substrate,
wherein the second processing includes starting the supply of the rinse liquid during the supply of the etching liquid in the first processing,
wherein the fourth processing includes starting the supply of the rinse liquid during the supply of the etching liquid in the third processing,
wherein the second processing or the fourth processing includes, while discharging the rinse liquid from a nozzle of the rinse liquid supply, 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.