Magnetic storage medium containing at least two different populations of magnetic particles each population having a separate mean coercive field strength
US5134041A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Sep 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to be able to improve the level or the dynamic ratio and the signal-to-noise ratio of a magnetic storage medium for analog signal recording, with the distortion factor remaining the same, certain rules are formulated for the quality of the magnetic particles in the storage medium. According to these rules the particles shall be of at least two kinds, all particles of one kind having the same structure. Furthermore, the distribution curve (9) which specifies how many particles possess a certain coercive field strength shall be broadened in the range (20) of the most frequent coercive field strength (H.sub.c9), as compared to a Gaussian distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.