Patent ID: 9305767
Filing Date: 2016-04-05
CPC Classification: H01L

Claim Text:
1. A liquid processing apparatus that performs a liquid process by supplying a processing solution to a surface of a target substrate, the liquid processing apparatus comprising: a housing in which the liquid process is performed; a rotation unit configured to hold the target substrate within the housing and rotate the target substrate around a vertical axis; a processing solution supply nozzle configured to supply the processing solution to the surface of the target substrate being held and rotated by the rotation unit; a cup provided around the rotation unit; a first gas supply unit, provided to face the target substrate held by the rotation unit, configured to form a downward flow of a first gas that flows over the entire surface of the target substrate and is introduced into the cup in order to form a processing atmosphere on the surface of the target substrate; a second gas supply unit configured to form a downward flow of a second gas different from the first gas in a region outside the downward flow of the first gas; and a controller configured to control rotation speed of the target substrate and a flow rate of the first gas supplied from the first gas supply unit to form a trumpet-shaped flow of the first gas, such that the entire surface of the target substrate is covered with the first gas and the second gas is supplied so that the second gas is suppressed from being introduced into the trumpet-shaped flow of the first gas, wherein the first gas supply unit and the second gas supply unit are provided at a ceiling portion of the housing.