Patent ID: 8507375
Filing Date: 2013-08-13
Classification: H01L

Abstract:
1. A method for forming an alignment tolerant electrical contact to a contact region of an underlying substrate, comprising: providing a substrate having thereon a first electrically conductive region with an upper surface, wherein the conductive region is laterally bounded by a first dielectric region; applying a mask over the first dielectric region and the upper surface, the mask having an opening extending partly over the contact region and over a part of the upper surface; removing a portion of the first dielectric region underlying the mask opening to form a passage through the first dielectric region extending to the contact region and the part of the upper surface, thereby exposing the contact region and the part of the upper surface; converting the part of the upper surface to a second dielectric region; and filling the passage with a conductor making electrical contact with the contact region and making contact with the second dielectric region and electrically insulated thereby from the electrically conductive region.