Patent ID: 6325081
Filing Date: 2001-12-04
Classification: B08B,H01L

Abstract:
A washing apparatus which is provided with: an undiluted cleaning liquid injection means for injecting an undiluted solution of a cleaning liquid into an ultrapure water channel via a capillary and producing a cleaning liquid of a desired concentration, a cleaning liquid supply means for supplying a cleaning liquid prepared at a desired concentration simultaneously to front and rear surfaces of a substrate, which is connected to said ultrapure water channel, a means for superposing high frequency sound waves of 0.5 MHz or more on said substrate via said cleaning liquid, and a means for moving either of said substrate and said cleaning liquid supply means in one direction; which is capable of continuously conducting washing of a substrate by means of a cleaning liquid and washing by means of ultrapure water, by means of controlling injection of said undiluted solution into said ultrapure water channel.