Patent ID: 8533895

Claim:
A brush for cleaning of substrates following chemical mechanical polishing (post-CMP) of the substrates comprising: a generally cylindrical body having a circumferential outer surface; a plurality of nodules unitarily molded with and projecting outwardly from and circumferentially around the outer surface of the cylindrical body, the nodules being spaced apart from each other and separated by gaps, each nodule having a height extending from the outer surface of the cylindrical body to a substrate engagement surface of the nodule, and wherein the substrate engagement surface of one or more of the nodules has a rounded configuration; a hollow rotatable base having one or more through channels that permit fluid flow between an inner surface and an outer surface of said hollow rotatable base; and a porous sponge material including the outer surface of the generally cylindrical body and the plurality of nodules that covers at least a portion of the outer surface of the hollow rotatable base and fills one or more of the through channels of the hollow rotatable base to form the generally cylindrical body, thereby interlocking the porous sponge material and hollow rotatable base such that the height and alignment of the nodules with respect to the hollow rotatable base is maintained when the brush is in use.