Patent ID: 8801865
Filing Date: 2014-08-12
Classification: H01L

Abstract:
1. Process for treating a peripheral area of a wafer-shaped article comprising: holding the wafer-shaped article at its edge and rotating the wafer-shaped article about an axis A with holding means, wherein the holding means comprise rollers for driving the wafer-shaped article at its edge, supplying a first liquid towards a first section of the peripheral area with a first liquid treatment unit, wherein the supplying of the first liquid comprises: wetting the first section of the peripheral area with the first liquid, so that the section of the peripheral area moves along the peripheral area of the wafer-shaped article as the wafer-shaped article rotates, removing most of the first liquid; supplying a second liquid towards a second section of the peripheral area with a second liquid treatment unit, wherein the supplying of the second liquid comprises: wetting the second section of the peripheral area with the second liquid, so that the section of the peripheral area moves along the peripheral area of the wafer-shaped article as the wafer-shaped article rotates, supplying gas from a gas treatment section positioned circumferentially adjacent to the second liquid treatment unit with respect to a circle centered on and perpendicular to axis A, towards the wetted second section of the peripheral area, for removing residues of the second liquid from the peripheral area, and discharging supplied gas and removed liquid; wherein the first and second liquids are different from one another and are dispensed simultaneously onto the wafer-shaped article without substantial mixing of the first and second liquids.