Magnetic head having a reader overcoat with DLC and a recessed writer overcoat without DLC
US9659587B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2015 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Nov 6, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head includes a slider defining an air bearing surface (ABS) and having a trailing face approximately orthogonal to the ABS. A transducer is disposed on the trailing face and includes a reader and a writer. The writer comprises a non-ferromagnetic writer encapsulate material, and includes a ferromagnetic write pole embedded in the non-ferromagnetic writer encapsulate material. The reader comprises a non-ferromagnetic reader encapsulate material, and includes a magnetoresistive sensor stack embedded in the non-ferromagnetic reader encapsulate material. The magnetic head further includes a novel dual overcoat having a writer overcoat material disposed on the writer, and a reader overcoat material disposed on the reader. The reader overcoat material comprises diamond-like carbon (DLC), and the writer overcoat material does not comprise DLC. An example method for fabricating the novel dual overcoat is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.