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Magnetic recording medium having a dimensional variation

專(zhuān)利號(hào)
US10867630B2
公開(kāi)日期
2020-12-15
申請(qǐng)人
Sony Corporation（JP Tokyo）
發(fā)明人
Noboru Sekiguchi; Minoru Yamaga
IPC分類(lèi)
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(shū)

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(In the formula, Rf represents an unsubstituted or substituted, and saturated or unsaturated fluorine-containing hydrocarbon group or hydrocarbon group, Es represents an ester bond, and R, which may be omitted, represents an unsubstituted or substituted, and saturated or unsaturated hydrocarbon group.)

The carboxylic acid compound mentioned above is preferably represented by the following general formula (2) or (3).

General Formula (2):

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(In the formula, Rf represents an unsubstituted or substituted, and saturated or unsaturated fluorine-containing hydrocarbon group or hydrocarbon group.)
General Formula (3):

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(In the formula, Rf represents an unsubstituted or substituted, and saturated or unsaturated fluorine-containing hydrocarbon group or hydrocarbon group.)

The lubricant preferably includes one or both of the carboxylic acid compounds represented by the general formulas (2) and (3).

權(quán)利要求

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