Patent ID: 6858092

Claim:
A process for treating a wafer-shaped article with a liquid in a defined area near a peripheral edge of the wafer-shaped article, the process comprising the steps of: placing the wafer-shaped article onto a holder, the wafer-shaped article having a first side facing the holder, a second side opposite the first side, and a peripheral edge between the first and second sides, the defined area being on the first side; providing a gap between the first side of the wafer-shaped article and the holder, the gap extending radially inward from the peripheral edge to a recess in the holder, the radially inward extent of the gap defining the defined area; applying the liquid in the gap to wet and treat the defined area with the liquid, the gap being filled so that the liquid simultaneously wets the defined area and part of the holder, wherein the recess is a channel that branches from the gap at the radially inward end of the gap, and further comprising the step of diverting the liquid that has been applied in the gap to the channel.