Patent ID: 6063232
Filing Date: 2000-05-16
Classification: H01L

Abstract:
An apparatus for etching a peripheral edge face of a wafer, comprising: rotatable chuck means for releasably holding a wafer having a pair of opposed major faces separated by a peripheral edge face; a rotatable etching roller having a peripheral face; means mounting the etching roller for displacement into and out of an operating position wherein the etching roller face contacts the wafer edge face; means for supplying etching liquid onto the etching roller face for transfer to the wafer edge face; an enclosure containing therein the etching roller and the means for supplying etching liquid onto the etching roller face, the enclosure having an opening throuah which a peripheral edge portion of the wafer extends into the enclosure for contact with the etching roller face; and means for rotating the wafer and etching roller while in contact with one another to effect transfer of the etching liquid, within the enclosure, from the etching roller face to the wafer edge face accompanied by etching of the wafer edge face.