Magnetic head for perpendicular magnetic recording including a main pole with a lower protrusion
US9336798B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Dec 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3169
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A main pole includes a main body and a lower protrusion. The lower protrusion is located at a distance from a medium facing surface. The main body includes a front portion and a rear portion. The front portion has a first side surface and a second side surface. The lower protrusion has a third side surface and a fourth side surface. A first side shield has a first sidewall opposed to the first side surface. A second side shield has a second sidewall opposed to the second side surface. A bottom shield includes a receiving section. The receiving section has a third sidewall opposed to the third side surface, and a fourth sidewall opposed to the fourth side surface. The receiving section and the lower protrusion are formed in a self-aligned manner by using the first and second side shields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.