Magnetic recording medium and cartridge
US10665259B1 · kind B1 · utility
28Cited by
0References
27Claims
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Key dates
| Filing date | Jun 27, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Jun 27, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tape-type magnetic recording medium, includes a substrate; and a magnetic layer provided on the substrate. In a case where wmax and wmin are respectively maximum and minimum of average values of width of the magnetic recording medium measured under four environments whose temperature and relative humidity are (10° C., 10%), (10° C., 80%), (29° C., 80%), and (45° C., 10%), respectively, wmax and wmin satisfy a relation of (wmax−wmin)/wmin≤400 [ppm]. The substrate contains polyester, and the magnetic layer has a squareness ratio of 65% or more in the vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.