System and apparatus for patterned media with reduced magnetic trench material
US8130468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jan 3, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49069
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bit patterned magnetic media design for reducing the amount of magnetic material located in the trenches between topographic features is disclosed. An intermediate non-magnetic layer is deposited on the topography prior to depositing the functional magnetic layer on the topographic substrate features. The non-magnetic layer increases the width of the land regions that will ultimately support the functional magnetic layer. The non-magnetic layer also reduces the amount of trench deposition that can occur in the subsequent deposition of the magnetic recording layer. By eliminating most of the magnetic trench material, the amount of magnetic flux and readback interference produced by the trench material is reduced to an acceptable level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.