Magnetic recording medium and cartridge
US11854585B2 · kind B2 · utility
3Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2021 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | Mar 19, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is a magnetic recording medium having a tape shape and includes a substrate, an underlayer provided on the substrate, and a magnetic layer provided on the underlayer. The magnetic layer has a surface having an uneven shape, a height range ΔH obtained from statistical information of a height of the uneven shape is in a range of 4.00 nm≤ΔH≤10.00 nm, and a gradient range ΔA obtained from statistical information of a gradient of the uneven shape is in a range of 2.50 degrees ≤ΔA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.