Patent ID: 7820005

Claim:
A method for manufacturing a multilayer chemical mechanical polishing pad comprising: providing a polishing layer; providing a subpad layer having a top surface and a bottom surface; providing an unset reactive hot melt adhesive; providing the subpad layer with at least two wrap around tabs; providing a backing plate having a top side and a bottom side; placing the subpad layer onto the backing plate with the bottom surface of the subpad layer facing the top side of the backing plate and folding the at least two wrap around tabs around to the bottom side of the backing plate and securing the at least two wrap around tabs to the bottom side of the backing plate before applying the unset reactive hot melt adhesive; applying the unset reactive hot melt adhesive to the top surface of the subpad layer, wherein the unset reactive hot melt adhesive is applied in a pattern of parallel lines; placing the polishing layer over the pattern of parallel lines of unset reactive hot melt adhesive forming a polishing pad stack; applying a force to the polishing pad stack pressing the polishing layer and subpad layer together; allowing the unset reactive hot melt adhesive to set forming a reactive hot melt adhesive bond between the polishing layer and the subpad layer; and, removing the at least two wrap around tabs from the subpad layer and separating the subpad layer from the backing plate after the formation of the reactive hot melt adhesive bond between the polishing layer and the subpad layer.