Patent ID: 7926439
Filing Date: 2011-04-19
Classification: B05D,H01L

Abstract:
1. A substrate processing apparatus for processing a substrate, comprising: a housing accommodating a substrate holding device that rotates the substrate about an axis of rotation while holding the substrate; a processing liquid supplier that supplies a processing liquid onto the substrate held by said substrate holding device; a splash guard disposed surrounding said substrate holding device and having an upper opening and a lower opening for preventing the processing liquid supplied onto the substrate from being splashed outward; a gas supply system that supplies gas to said housing; and an air current formation chamber having three or more spray ports formed in a sidewall thereof and arranged above said upper opening of said splash guard and disposed radially outwardly from said upper opening and said axis of rotation, and arranged for spraying said gas in a tangential direction of the substrate rotated by said substrate holding device or a direction parallel to the tangential direction and thereby generating a spiral air current above said upper opening of said splash guard.