Patent ID: 6286526
Filing Date: 2001-09-11
Classification: B24B,H01L

Abstract:
An apparatus for surface treatment of semiconductor substrate with chemical solution, having:a cleaning bath in which a semiconductor substrate is placed and treated with a chemical solution, andan overflow bath provided so as to surround the cleaning bath,wherein the overflow bath has a circulating bath and a mixing bath; the circulating bath communicates with a first circulating pump; the mixing bath is fitted with pipes for feeding a predetermined components of chemical solution effective for surface treatment and also fitted with a pipe for feeding ultrapure water; the mixing bath communicates with a second circulating pump; a filter for removal of fine particles is provided downstream of a site at which an outlet side of the first circulating pump and an outlet side of the second circulating pump merge; and the first circulating pump and the second circulating pump feed the predetermined components of chemical solution into the cleaning bath.