Magnetic recording medium
US11688425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2020 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Jun 17, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/653
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
It is an object to provide a magnetic recording medium that enables good reproduction even after long-term preservation and that has a small overall thickness.The present technology provides a tape-shaped magnetic recording medium including a magnetic layer, a ground layer, a base layer, and a back layer, in which an average thickness tT of the magnetic recording medium is equal to or less than 5.3 μm, and, when the magnetic recording medium is subjected to dynamic viscoelasticity measurement at a frequency of 10 Hz and a temperature rise rate of 2° C./min, a difference between a maximum and a minimum of a viscosity term E″ in a temperature range of 0° C. to 80° C. is equal to or less than 0.18 GPa. In addition, the present technology also provides a tape cartridge including the tape-shaped magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.