Patent ID: 9378940
Filing Date: 2016-06-28
CPC Classification: G03F,H01L

Claim Text:
1. A substrate processing apparatus comprising: a substrate processing chamber configured to process a substrate on which a target layer to be removed is formed on the surface of an underlying layer; a substrate holding unit provided in the substrate processing chamber and configured to hold the substrate; a mixed liquid supplying unit configured to supply a mixed liquid of sulfuric acid and hydrogen peroxide to the substrate held by the substrate holding unit in a mixing ratio and at a temperature that does not damage the underlying layer while removing the target layer; an OH-group supplying unit configured to supply a fluid containing OH-group to the substrate in an amount that does not damage the underlying layer when the mixed liquid and the OH-group are mixed on the substrate, while supplying the mixed liquid of sulfuric acid and hydrogen peroxide to the substrate; and a controller configured to control operation of the substrate processing apparatus, wherein the controller is configured to control flow rates of sulfuric acid and hydrogen peroxide, wherein the controller is configured to control the OH-group supplying unit such that the controller controls a flow rate of fluid containing OH-group supplied to the substrate, and wherein the controller is programmed such that the amount of the fluid containing OH-group supplied to the substrate is decreased while continuing the supply of the mixed liquid of sulfuric acid and hydrogen peroxide to the substrate, and as the processing progresses and less of the target substrate is removed, the reduction of the supply of the fluid containing OH-group results in less heat being generated and allows removal of the remnants of the target substrate while reducing the risk of damage to the underlying layer.