Magnetic head for perpendicular magnetic recording with a trailing shield including a plurality of portions different in saturation flux density
US9502053B1 · kind B1 · utility
10Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Dec 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head includes a main pole, a write shield, and a gap section. The write shield includes a trailing shield. The trailing shield includes a first portion, a second portion, a third portion and a fourth portion. The second portion and the third portion are located on opposite sides of the first portion in the track width direction. Top surfaces of the first to third portions are coplanar with each other. The fourth portion lies on the top surfaces of the first to third portions. The first portion is higher in saturation flux density than the second to fourth portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.