Stabilized shields for magnetic recording heads
US8514524B2 · kind B2 · utility
13Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2008 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/398
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A basic design is disclosed for bottom shield (S1) and top shield (S2) of the reader shields in a magnetic read-write head. The critical part of new design includes an antiferromagnetic film which pins an antiferromagnetically coupled trilayer (AFCT). The simplest embodiment for top shield, for example, would be a film sequence of FM/Ru/FM/AFM. This replaces the normal top shield design which typically comprises a ferromagnetic seed layer and a thicker plated ferromagnetic film. Processes for manufacturing these shields are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.