Patent ID: 8087975
Filing Date: 2012-01-03
Classification: B24B,B24D,B32B,Y10T

Abstract:
1. A polishing equipment, comprising: a lower base plate; a composite sheet fixed on the lower base plate; a polishing workpiece supported and mounted by the composite sheet when polishing; an upper base plate opposite to the lower base plate; a polishing pad mounted on the upper base plate and facing the lower base plate for polishing the workpiece; wherein the composite sheet, comprises: a buffer layer having a plurality of continuous pores that communicate with each other; and an adsorption layer located on the buffer layer for adsorbing the workpiece, wherein the compression ratio of the buffer layer is higher than that of the adsorption layer, the adsorption layer has a plurality of holes that communicate with each other, and the continuous pores of the buffer layer communicate with the holes of the adsorption layer.