Method for replicating magnetic patterns on hard disk media
US6898031B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Nov 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/86
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for replicating magnetic patterns on hard disk media includes a mask located over or above a magnetic recording layer. The recording layer may include a single, dual, or multi-layer recording layer. A pattern is or has been formed in the mask, where the pattern defines the recordable regions and the non-recordable regions to be created in one or more layers within the recording layer. Portions of the recording layer are then exposed. An etch may then be performed to create grooves within one or more layers in the exposed regions of the recording layer. The magnetic properties of at least one layer in the exposed portions of the recording layer are then altered in order to create recordable or non-recordable regions. The mask is then removed from the recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.