Patent ID: 7681519

Claim:
An apparatus comprising: a rotatable wafer support configured to support a wafer; a beam nozzle configured to perform Wafer Edge Exposure (WEE) with respect to a photoresist layer at an edge of the wafer; and a spray nozzle configured to spray an alkali solution onto the edge of the wafer exposed using the beam nozzle, wherein the spray nozzle comprises a first spray nozzle configured to spray the alkali solution onto the edge of a top surface of the wafer, a second spray nozzle positioned substantially opposite of a location of the beam nozzle and configured to spray the alkali solution onto the edge of a bottom surface of the wafer at a first location, and a third spray nozzle positioned substantially adjacent to the beam nozzle and configured to spray the alkali solution onto the edge of the bottom surface of the wafer at a second location approximately 180° rotated from the first location.