Patent ID: 6726775
Filing Date: 2004-04-27
Classification: B05D,H01L,Y10S

Abstract:
An aging unit, comprises:a treatment chamber accommodating a substrate; a plurality of ammonia baths reserving ammonia water; a bubbling gas feeding system for feeding a carrier gas for bubbling to the each ammonia bath; a bubbling gas valve for switching the each bubbling gas feeding system; an exhaust system for exhausting a gas generated from the each ammonia bath; an exhaust system valve for switching the each exhaust system; an ammonia gas feeding system for feeding the gas generated at the each ammonia bath to the treatment chamber; an ammonia gas valve for switching the each ammonia gas feeding system; and a means of, together with opening sequentially the each bubbling gas valve, synchronizing with switching of each bubbling gas valve, closing in turn the each exhaust system valve, and opening in turn the each ammonia gas valve.