Patent ID: 6823876
Filing Date: 2004-11-30
Classification: B08B,H01L,Y10S

Abstract:
A method of cleaning and maintenance used for a rotational etching tool, wherein the rotational etching tool comprises a wafer supporting means, at least a cleaning chamber and an etching chamber, the wafer supporting means is moveable between the cleaning chamber and the etching chamber, at least a nozzle is positioned above the wafer supporting means for ejecting a cleaning liquid, the method comprising steps of:floating a wafer on air cushion over the wafer supporting means, and spinning the wafer at a first rotating speed; moving the wafer supporting means to a first position in one of the chambers; applying the cleaning liquid to the wafer while continuing to rotate the wafer at the first rotating speed, thereby cleaning one of the chambers; moving the wafer supporting means to a second position in the other chamber; and applying the cleaning liquid to the wafer, changing a rotation speed of the wafer from the first rotating speed to a second rotating speed, and rotating the wafer supporting means at the second rotating speed, thereby cleaning the other chamber.