Magnetic tape, magnetic tape cartridge, and magnetic tape device

The magnetic tape design with controlled friction distribution and structural enhancements addresses head tilt deviations in low-temperature, high-humidity environments, ensuring stable data recording and playback.

WO2025173625A1 Publication Date: 2025-08-21FUJIFILM CORP
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Patent Information

Application Number
PCT/JP2025/003860
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-06
Filing Date
2025-02-06
Publication Date
2025-08-21

AI Technical Summary

Technical Problem

Magnetic tapes experience issues with data overwriting and playback failures due to head tilt deviations caused by width deformation in low-temperature, high-humidity environments, necessitating improved running stability and head tracking accuracy.

Method used

A magnetic tape design with a non-magnetic support and a magnetic layer containing ferromagnetic powder, featuring a reduction rate of friction distribution standard deviation of 20% or more, kinetic friction force of 15 gf or less, and specific structural components to maintain stability during tilted head operation.

Benefits of technology

The magnetic tape exhibits excellent running stability and reduces data overwriting and playback failures in low-temperature, high-humidity conditions by stabilizing head tilt operations, enhancing data recording and retrieval reliability.

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Abstract

Provided is a magnetic tape that has a non-magnetic support and a ferromagnetic powder-containing magnetic layer. The reduction rate of standard deviation of a friction distribution, which is measured by a horizontal force microscope in a measurement region of 3 μm × 3 μm on a surface of the magnetic layer before and after 500-time reciprocating sliding with respect to an LTO8 head at a head inclination angle of 15° in an environment where the temperature is 15°C and the relative humidity is 80%, is 20% or more.
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