Magnetic head for perpendicular magnetic recording having a main pole and a shield
US8274759B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 28, 2011 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Nov 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A main pole has a top surface including a first portion and a second portion. The main pole has a bottom end including a third portion and a fourth portion. Each of the first and third portions has a first end located in a medium facing surface. The first portion is inclined relative to the medium facing surface and a first virtual plane that passes through the first end and is perpendicular to the medium facing surface and to the direction of travel of a recording medium. The third portion is inclined relative to the medium facing surface and a second virtual plane that passes through the first end and is perpendicular to the medium facing surface and to the direction of travel of the recording medium. The first portion is smaller than the third portion in length in a direction perpendicular to the medium facing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.