Magnetic recording medium having controlled dimensional variation
US11302354B2 · kind B2 · utility
3Cited by
16References
20Claims
0Family size
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Key dates
| Filing date | Sep 25, 2020 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/7358
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The average thickness tT of a magnetic recording medium meets the requirement that tT≤5.5 [μm], and the dimensional change amount Δw in the width direction of the magnetic recording medium with respect to the tension change in the longitudinal direction of the magnetic recording medium meets the requirement that 700 ppm/N≤Δw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.