Patent ID: 9070854
Filing Date: 2015-06-30
Classification: G11C,H01L

Abstract:
1. A method of patterning a substrate comprising: providing a layer stack comprising a plurality of layers on a base portion of the substrate, the layer stack comprising a plurality of initially electrically conductive layers and a magnetic layer; forming a first mask feature on an outer surface of the layer stack above a first protected region and a second mask feature on the outer surface of the layer stack above a second protected region, wherein the first protected region and second protected region define an exposed region therebetween that is not covered by a mask feature; directing ions towards the layer stack, wherein the ions are effective to magnetically isolate the first protected region from the second protected region, wherein the directing the ions comprises forming implanted regions of the layer stack within the plurality of electrically conductive layers and the magnetic layer in the exposed region; and etching at least a portion of the implanted regions of the layer stack within the plurality of electrically conductive layers and the magnetic layer after formation of the implanted regions, wherein a tapered side region is formed from a remaining portion of the implanted regions, the tapered region being magnetically deadened, wherein the first protected region is magnetically isolated and electrically isolated from the second protected region, and wherein the first protected region is physically isolated from the second protected region.