Sony patents thin magnetic tape with specific conductive particle layout
Sony has been granted a patent for a magnetic recording tape that is very thin, measuring 5.3 micrometers or less in thickness. The tape's magnetic layer contains tiny conductive particles arranged with specific density and size limits to maintain performance.
In the filing’s own words
A magnetic recording medium is a tape-shaped magnetic recording medium and includes: a base; and a magnetic layer. The magnetic layer contains a conductive particle. An average thickness of the magnetic recording medium is 5.3 μm or less. An average number of conductive particles per 400 μm 2 of a surface of the magnetic layer is 50 or more, an average conductive particle area of the surface of the magnetic layer is 35000 nm 2 or less, and an average conductive particle area ratio on the surface of the magnetic layer is less than 2.00%.
What exactly they claim (claim 1)
1. A tape-shaped magnetic recording medium, comprising: a base; and a magnetic layer, the magnetic layer including conductive particles, an average thickness of the magnetic recording medium being 5.3 μm or less, an average number of conductive particles per 400 μm 2 of a surface of the magnetic layer being 50 or more, an average conductive particle area of the surface of the magnetic layer being 35000 nm 2 or less, an average conductive particle area ratio of the surface of the magnetic layer being less than 2.00%, wherein an average number of conductive particles having a particle size of 200 nm or more in a width direction of the magnetic recording medium per 400 μm 2 of the surface of the magnetic layer is 10 or more and 30 or less.
Facts
- Company
- Sony (Sony Group Corporation)
- Official title
- Magnetic recording tape medium with conductive particle configuration and cartridge
- Patent number
- US12731609B2
- Application number
- 18844710
- Filed
- Mar 28, 2023
- Granted
- Sep 8, 2026
- Inventors
- 2
- Claims
- 15
Classified under
G11B 5/78 Physics & computingG11B 5/00813 Physics & computingG11B 5/09 Physics & computingG11B 5/70 Physics & computingG11B 5/706 Physics & computingG11B 5/70678 Physics & computingMore from Sony in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.