Magnetic recording medium with magnetic powder in lower magnetic layer having protective image diameters
US5705268A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprising a nonmagnetic support having formed thereon a plurality of magnetic layers including a top magnetic layer and an intermediate magnetic layer adjacent to the top magnetic layer, wherein the intermediate magnetic layer contains soft magnetic powder, the soft magnetic powder having, in its projective image, an average longer diameter <L> and a standard deviation of the longer diameter .DELTA.L satisfying the relationship represented by formula (1), and an average shorter diameter <W> and a standard deviation of the shorter diameter .DELTA.W satisfying the relationship represented by formula (2): EQU 0.05.ltoreq..DELTA.L/<L>.ltoreq.0.8 (1) EQU 0.05.ltoreq..DELTA.W/<W>.ltoreq.0.8 (2)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.