Patent ID: 7789738
Filing Date: 2010-09-07
Classification: B24B

Abstract:
1. A sheet for mounting a workpiece to be polished, comprising: a substrate, having a surface; a surface layer, located on the surface of the substrate, having no hole structure in the interior thereof, and having a surface; and a rough layer, located on the surface of the surface layer, and for carrying and mounting the workpiece to be polished, and having no hole structure in the interior thereof, the rough layer including a plurality of periodic protrusions to define a rough surface of the rough layer, wherein the periodic protrusions are regularly repeated, wherein each protrusion has a height and the heights of the protrusions are equal, and wherein the periodic protrusions define periodic and regularly spaced vent spaces therebetween, wherein air is vented out via the vent spaces when the workpiece to be polished contacts the rough surface of the rough layer.