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

Claim 8:
9. 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 of the metal polycrystalline film to etch an upper portion of the metal polycrystalline film 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 as a lower portion of the metal polycrystalline film at the peripheral portion of the substrate in the thickness direction of the metal polycrystalline film 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.