Patent ID: 8955529
Filing Date: 2015-02-17
Classification: H01L,Y10S

Abstract:
1. Device for wet treating a substrate, comprising: a spin chuck for holding and rotating the substrate about a rotation axis; at least one dispenser for dispensing a liquid onto at least one surface of said substrate; a liquid collector circumferentially surrounding said spin chuck for collecting liquid, which is spun off the substrate during rotation, with at least two collector levels for separately collecting liquids in different collectors; lifting means for moving said spin chuck relative to said liquid collector substantially along said rotation axis; at least two exhaust levels for separately collecting gas from the interior of the liquid collector; at least one exhaust influencing means, which is associated with said at least two exhaust levels, for selectively varying gas flow conditions in said at least two exhaust levels; and a computer that automatically sets an exhaust flow for each of said at least two exhaust levels based on a vertical position of said spin chuck relative to said liquid collector.