Patent ID: 8597531

Claim:
A method for manufacturing a device on a substrate, the method comprising: forming a layer structure on the substrate; forming an auxiliary layer on the layer structure; forming a planarization layer on the auxiliary layer and on the substrate, wherein the planarization layer and the substrate comprise a same material; forming studs in a first region over the substrate by etching the planarization layer, the studs being formed over and around the auxiliary layer; subjecting the auxiliary layer and the planarization layer to a chemical mechanical polishing process to expose a top surface of the planarization layer and a top surface of the auxiliary layer, wherein the chemical mechanical polishing process comprises a first removal rate with respect to the planarization layer and a second removal rate with respect to the auxiliary layer, wherein the first removal rate is greater than the second removal rate, and wherein the top surface of the planarization layer around the auxiliary layer in the first region is coplanar with a top surface of the layer structure after the chemical mechanical polishing process; and selectively removing the auxiliary layer to form a substantially planar surface of the layer structure and the planarization layer.