A magnetoresistive sensor includes a track width oxide layer which overlies a magnetoresistive element. Etch stop layers lie on opposite sides of the magnetoresistive element adjacent a magnetoresistive element. Contact/boundary control layers overlie the etch stop layer and lie adjacent the track width...http://www.google.es/patents/US5256249?utm_source=gb-gplus-sharePatente US5256249 - Method of manufacturing a planarized magnetoresistive sensor
Method of manufacturing a planarized magnetoresistive sensor