Patent ID: 8760819
Filing Date: 2014-06-24
Classification: G11B

Abstract:
1. A magnetic recording sensor for use in a data storage device, comprising: a read sensor stack comprising: a magnetic shield comprising a first soft ferromagnetic layer, a second soft ferromagnetic layer, a third soft ferromagnetic layer, and a first antiferromagnetic coupling (AFC) trilayer between the first soft ferromagnetic layer and the second soft ferromagnetic layer, wherein the first AFC trilayer comprises: a second AFC trilayer; and a bottom shield disposed on the side of the fourth end of the read sensor stack, wherein the second AFC trilayer location is at least one of: wherein the second soft ferromagnetic layer surrounds a portion of the first and second ends of the read sensor stack, wherein the first AFC trilayer surrounds a portion of the first and second ends of the read sensor stack; and wherein the read sensor stack is separated from the first and second soft ferromagnetic layers by a nonmagnetic gap.