Method of fabricating a perpendicular magnetic recording medium
US9053732B2 · kind B2 · utility
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Key dates
| Filing date | Jan 6, 2012 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | May 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F10/3272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of forming a perpendicular magnetic recording medium. The perpendicular magnetic recording medium comprises a substrate, an underlayer on the substrate, an intermediate layer on the underlayer and a recording layer on the intermediate layer. The underlayer comprises a first soft underlayer, an antiferromagnetically coupled Ru layer on the first soft underlayer, a second soft underlayer on the antiferromagnetically coupled Ru layer, and an orientation control layer on the second soft underlayer, the method comprises applying a negative bias voltage to the substrate during formation of the underlayer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.