Recording noise reduction
US6753078B2 · kind B2 · utility
1Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium includes a highly permeable magnetic layer proximal to a recording layer. During recording, the permeable magnetic layer modifies the recording field from a recording head to produce consistently shaped recording transitions with a significant perpendicular component. The transitions are consistently shaped even though the distance between the recording head and the surface of the medium may change. Transitions so formed result in a reduction of noise from the medium surface roughness. The permeable magnetic layer further reduces noise caused by stray dipole fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.