Patent ID: 7422940

Claim:
A process for producing a layer arrangement, comprising: forming a plurality of electrically conductive structures on a substrate, comprising: forming trenches in the substrate; introducing electrically conductive material of the electrically conductive structures into the trenches; and removing material of the substrate between the electrically conductive structures; depositing a first electrically insulating layer on the plurality of electrically conductive structures, in such a manner that trenches are formed between mutually adjacent regions of the first electrically insulating layer; forming electrically insulating structures in the trenches between the adjacent regions of the first electrically insulating layer; removing material of the first electrically insulating layer, so that airgaps are formed between the electrically insulating structures and the electrically conductive structures; and forming a second electrically insulating layer on the electrically conductive structures and on the electrically insulating structures, in such a manner that the second electrically insulating layer spans adjacent electrically conductive structures and electrically insulating structures.