Magnetic recording apparatus having a recessed additional pole segment
US9478242B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2016 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Mar 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic write apparatus has a media-facing surface (MFS), a pole, a trailing shield, coil(s) and a write gap between the pole and trailing shield. The pole includes leading and trailing surfaces, a main portion having a first bevel and an additional portion having a second bevel and adjoining the main portion. The first bevel adjoins the MFS and is at a nonzero, acute first bevel angle from a direction perpendicular to the MFS. The second bevel is recessed from the MFS by not more than eighty nanometers, oriented at a second bevel angle from the direction and offset from the first bevel by a taper having a taper angle that is greater than the first bevel angle. The additional portion is at least ten nanometers and not more than sixty nanometers thick as measured from the first bevel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.