Patent ID: 7674324
Filing Date: 2010-03-09
Classification: B01D,B01J,B82Y,Y10S

Abstract:
1. An exposure system for exposing a photoresist layer on a top surface of a wafer to light, comprising: an environment chamber containing a light source, one or more focusing lenses, a mask holder, a slit and a wafer stage, said light source, said one or more focusing lenses, said mask holder and said slit aligned to an optical axis said wafer stage moveable in two different orthogonal directions, each said orthogonal direction orthogonal to said optical axis, said mask holder and said slit moveable in one of said two orthogonal directions; a filter in a sidewall of said environment chamber, said filter comprising: means for forcing air or inert gas first through said filter then into said environment chamber and then out then out of said environment chamber.