Patent ID: 7262118
Filing Date: 2007-08-28
Classification: H01L

Abstract:
1. A method for generating a structure on a substrate, comprising the following steps: (a) applying a layer sequence of a first oxide layer, a first nitride layer and a second oxide layer onto the substrate, the first nitride layer being applied to a surface of the first oxide layer, and the second oxide layer being applied to the first nitride layer; (b) removing a portion of the second oxide layer and a portion of the first nitride layer in order to expose a portion of the surface of the first oxide layer; (c) removing a part of the first nitride layer above the first oxide layer and below the second oxide layer to form an area for the structure to be generated; (d) conformably forming on the second oxide layer and the surface of the first oxide layer exposed by step (b) and (c) an electrically conductive layer; and (e) etching the electrically conductive layer to the second oxide layer and to the exposed surface of the first oxide layer in an anisotropic and selective way such that after etching the electrically conductive layer only remains on the area formed in step (c); and further comprising, after step (c), performing an implantation with regard to the substrate in order to form a doped area in the portion of the substrate only covered by the portion of the first oxide layer exposed by step (b).