Magnetic recording medium having controlled dimensional variation
US11315594B2 · kind B2 · utility
3Cited by
18References
20Claims
0Family size
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Key dates
| Filing date | Sep 25, 2020 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/7379
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is provided and includes a layer structure including a magnetic layer, a non-magnetic layer, and a base layer in this order, in which an average thickness tT of the magnetic recording medium is 3.5 μm≤tT≤5.3 μm, a dimensional variation Δw in a width direction of the magnetic recording medium to tension change in a longitudinal direction of the magnetic recording medium is 700 ppm/N≤Δw≤2000 ppm/N, and an average thickness tn of the non-magnetic layer is tn≤1.0 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.