Patent ID: 8043467
Filing Date: 2011-10-25
Classification: H01L

Abstract:
1. A liquid processing apparatus arranged to planarize a film on a substrate by supplying onto the film a process liquid for dissolving the film while rotating the substrate, the apparatus comprising: a substrate holding member configured to rotatably hold the substrate in a horizontal state; a rotation mechanism configured to rotate the substrate holding member; and a liquid supply mechanism configured to supply the process liquid onto a surface of the substrate, wherein the liquid supply mechanism includes a first liquid delivery nozzle and a second liquid delivery nozzle, which are configured to deliver said process liquid, such that the first delivery nozzle has a first nozzle diameter and is inclined to deliver the process liquid in a rotational direction of the substrate, and moveable between a center of the substrate and a peripheral edge thereof, and the second liquid delivery nozzle has a second nozzle diameter larger than the first nozzle diameter, and wherein the liquid supply mechanism provides correction etching to level a film thickness by supplying the process liquid at a first flow rate from the first liquid delivery nozzle onto the film, moving the first liquid delivery nozzle between the center of the substrate being rotated and the peripheral edge thereof at traveling velocities determined for respective zones in accordance with a film thickness profile of the film obtained in advance, and allover etching to decrease the film thickness as a whole by supplying the process liquid at a second flow rate larger than the first flow rate from the second liquid delivery nozzle onto the film on the substrate being rotated.