Planarization process

摘要

In a process for planarising semiconductor substrates, a coating is removed from the surface of the substrate so that the coating remains in a trench or contact hole of the substrate with the aid of an etchant, which is applied continuously to the rotating substrate. An Independent claim is also included for an etching solution and comprising an oxidant, and a component which is capable of forming a sparingly soluble salt and/or sparingly soluble complex with oxidation products.