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Magnetic recording medium having a dimensional variation

專利號(hào)
US10867630B2
公開日期
2020-12-15
申請(qǐng)人
Sony Corporation（JP Tokyo）
發(fā)明人
Noboru Sekiguchi; Minoru Yamaga
IPC分類
G11B5/62; G11B5/733; G11B5/706; C23C14/00; G11B5/735
技術(shù)領(lǐng)域
recording,magnetic,layer,medium,in,σmd,δw,nm,or,average
地域： Tokyo

摘要

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.

說(shuō)明書

A magnetic tape was obtained in a similar manner to Example 7 except that the application time of the magnetic field to the paint for forming a magnetic layer was adjusted and the squareness ratio S2 in the thickness direction (vertical direction) of the magnetic tape was set to 80%.

Example 24

A magnetic tape was obtained in a similar manner to Example 10 except that the curing conditions and re-curing conditions for the film with the base layer, recording layer, and back layer formed were adjusted such that the elastic limit value σMD in the longitudinal direction was 5.0 [N].

Example 25

A magnetic tape was obtained in a similar manner to Example 7 except that barium ferrite (BaFe12C19) nanoparticles were used instead of the ε-iron oxide nanoparticles.

Comparative Example 1

A magnetic tape was obtained in a similar manner to Example 1 except that the tensile of the PEN film was changed such that the dimensional change amount Δw was 650 [ppm/N].

(Determination of Amount of Change in Tape Width)

權(quán)利要求

1
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