Patent ID: 8929028
Filing Date: 2015-01-06
Classification: G11B,Y10T

Abstract:
1. A perpendicular magnetic write head, comprising: a magnetic write pole structure having a pole tip extending to an air bearing surface and having a first surface area at the air bearing surface, the magnetic write pole structure being configured to produce a magnetic write field oriented substantially perpendicular to the air bearing surface; and a magnetic return pole structure extending to the air bearing surface, the magnetic return pole having a second surface area at the air bearing surface that is larger than the first surface area, the magnetic return pole comprising first and second magnetic layers and a non-magnetic layer sandwiched between the first and second magnetic layers, the non-magnetic layer terminating at a location that is recessed from the air bearing surface so that the first and second magnetic layers contact one another at the air bearing surface; wherein the magnetic return pole structure is magnetically connected with the magnetic write pole structure at a location that is removed from the air bearing surface; and the magnetic write pole structure further comprises first and second magnetic shaping layers each terminating at a location that is recessed from the air bearing surface and a magnetic write pole located between the first and second magnetic layers and extending to the air bearing surface, the magnetic write pole being separated from each of the first and second magnetic shaping layers by a non-magnetic layer.