MAGNETIC RECORDING MEDIUM - SONY GROUP CORP

Title:

MAGNETIC RECORDING MEDIUM

Document Type and Number:

WIPO Patent Application WO/2024/070554

Kind Code:

A1

Abstract:

The purpose of the invention is to provide: a tape-form magnetic recording medium with which it is possible to correct any change in the width of the magnetic recording medium by adjusting the transport tension of the magnetic recording medium, even when the magnetic recording medium is stored or transported in a high-temperature environment; and a cartridge provided with said medium.　This tape-form magnetic recording medium has a magnetic layer that has a plurality of servo bands in which a plurality of servo patterns adjacent to each other in the width direction are recorded. Before and after the magnetic recording medium is left standing for 40 hours in an environment of a temperature of 50°C and a relative humidity of 40% RH while under longitudinal-directional tension of 0.55 N per 1/2 inch width of the magnetic recording medium, the absolute value of the average width change amount is 170 ppm or less, the average tension response to longitudinal-directional tension is 700 ppm/N or more in an environment of a temperature of 50°C and a relative humidity of 40% RH, and the average value of the difference in pitch between two adjacent servo bands in the plurality of servo bands over the entire length of the magnetic recording medium is 100 nm or less.

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Inventors:

YAMAGA MINORU (JP)
TAKAYAMA TAKAHIRO (JP)

Application Number:

PCT/JP2023/032607

Publication Date:

April 04, 2024

Filing Date:

September 07, 2023

Export Citation:

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Assignee:

SONY GROUP CORP (JP)

International Classes:

G11B5/70; G11B5/29; G11B5/584; G11B5/706; G11B5/73; G11B5/78; G11B5/84; G11B15/093; G11B15/43; G11B21/10; G11B23/107; G11B23/30

Domestic Patent References:

WO2023037585A1

2023-03-16

Foreign References:

JP6816851B1	2021-01-20
JP2021064431A	2021-04-22
JP2005327392A	2005-11-24
JP2006099919A	2006-04-13

Attorney, Agent or Firm:

WATANABE Kaoru (JP)

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