Patent ID: 8551870

Claim:
A method for producing an epitaxially coated semiconductor wafer by providing a semiconductor wafer having no epitaxial layer deposited thereon, and providing an epitaxial layer by a method, comprising the following steps in the order specified: (a) depositing an epitaxial layer on one side of a semiconductor wafer; (b) first polishing of the epitaxially coated side of the semiconductor wafer by using a polishing pad with fixed abrasive while supplying a polishing solution which is free of solids;(c) CMP polishing of the epitaxially coated side of the semiconductor wafer with a soft polishing pad containing no fixed abrasive, while supplying a polishing agent suspension; (d) depositing another epitaxial layer on the previously epitaxially coated and polished side of the semiconductor wafer, wherein in step (b) not all of the epitaxial layer of step (a) is removed by the first polishing.