Patent ID: 6209553
Filing Date: 2001-04-03
Classification: G03F,Y10S

Abstract:
An apparatus for washing a photomask comprising:an acid tank for removing organic matter and metal impurities present on the surface of a photomask with a first washing solution;a foreign matter removing tank for removing foreign matter adhering to said surface of said photomask with a second washing solution containing H.sub.2 gas dissolved water;a drying tank for drying said photomask;first washing solution supply means supplying said first washing solution to said acid tank;first control means provided on said first washing solution supply means for controlling the concentration and the temperature of said first washing solution;second washing solution supply means supplying said second washing solution to said foreign matter removing tank; andsecond control means provided on said second washing solution supply means for controlling the concentration and the temperature of said second washing solution.