Magnetic recording sensor with sputtered antiferromagnetic coupling trilayer between plated ferromagnetic shields
US8760819B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Apr 30, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3912
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording sensor for use in a data storage device is described. The sensor has a magnetoresistive sensing element and magnetic shields shielding the magnetoresistive sensing element. The magnetic shields include a first plated soft ferromagnetic layer, a second plated soft ferromagnetic layer, and an antiferromagnetic coupling (AFC) trilayer between the first plated soft ferromagnetic layer and the second plated soft ferromagnetic layer. The AFC trilayer includes a first AFC layer of sputtered ferromagnetic material; a second AFC layer of a nonmagnetic antiferromagnetic exchange material, and a third AFC layer of sputtered ferromagnetic material. Shields with AFC trilayers in bottom, side, and/or top shields, and well as between shields are provided. A method of fabricating is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.