Methods of protecting write pole from corrosion in HAMR head
US10482907B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Sep 27, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write pole in a heat assisted magnetic recording (HAMR) head for writing to a HAMR medium is provided that includes a recessed part proximal to a near field transducer (NFT) in the HAMR head to protect the write pole from corrosion. The recessed part extends from a portion of a bottom surface of the write pole along a portion of a side of the write pole proximal to the NFT. Within the recessed part, a pole pedestal may be formed of a material that is resistant to corrosion. The pole pedestal may have a rectangular, chamfered, or L-shape. The recessed part may further be induced on the portion of bottom surface of the write pole that extends along the portion of the side of the write pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.