Patent ID: 7244681

Claim:
A selective method for cleaning material from a wafer comprising: providing an etchant-dispensing apparatus having an inlet thereto for an etchant agent and a tubular member having at least one thin annular edge thereon to clean material from the wafer; placing an area of the wafer within an annular member of the etchant-dispensing apparatus, at least one thin annular edge of the annular member of the etchant-dispensing apparatus located adjacent a portion of the wafer to clean material from the wafer; aligning the wafer and the etchant-dispensing apparatus to clean material from the wafer; dispensing an etchant through another tubular member having a portion thereof surrounded by the tubular member having at least one thin annular edge thereon onto the area of the wafer using the etchant-dispensing apparatus to clean material from the wafer; and removing the etchant.