Magnetic recording medium
US10937457B2 · kind B2 · utility
8Cited by
1References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 12, 2019 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jul 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/851
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a magnetic recording medium of which an average thickness tT is tT≤5.6 μm, a dimensional change amount Δw in a width direction with respect to a change in tension in a longitudinal direction is 660 ppm/N≤Δw, a squareness ratio in a vertical direction is 65% or more, and a width deformation coefficient b during long-term storage in a case where a long-term storage width change amount Y is defined as Y=blog(t) is −0.06 μm≤b≤0.06 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.