Forming oriented film for magnetic recording material
US9034157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Oct 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/852
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and associated method for reorienting the magnetic anisotropy of magnetic recording discs. A pallet that is moveable along a path of travel is also sized to selectively hold either a first magnetic recording disc of a first size or a second magnetic recording disc of a second size different than the first size. A first processing chamber in the path of travel is adapted for forming a soft underlayer (SUL) of magnetic material with non-radially oriented magnetic anisotropy on a substrate corresponding to one of the first and second magnetic recording discs. A second processing chamber in the path of travel downstream of the first processing chamber is adapted for selectively re-orienting the SUL's magnetic anisotropy via a magnetic source emanating a first magnetic field if the substrate corresponds to the first magnetic recording disc and emanating a different second magnetic field if the substrate corresponds to the second magnetic recording disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.