Title:
MAGNETIC RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/189347
Kind Code:
A1
Abstract:
The primary purpose of the present invention is to provide a magnetic recording medium having excellent electromagnetic conversion characteristics. The present technology provides a magnetic recording medium having a layered structure including a magnetic layer and a base layer, wherein: the magnetic layer includes aluminum oxide particles; the surface roughness Rab (measured range: 236 μm × 177 μm) is no more than 1.70 nm; the arithmetic mean roughness Ra (measured range: 40 μm × 40 μm) is no more than 1.79 nm; the power spectrum density (PSD) value at a spatial wavelength of 5 μm or less is no more than 3.77 nm2; and the average height of projections formed by the aluminum oxide particles is no more than 0.0067 μm.
Inventors:
KAWAGUCHI TAIKI (JP)
TERAKAWA MASARU (JP)
YAMAGA MINORU (JP)
TERAKAWA MASARU (JP)
YAMAGA MINORU (JP)
Application Number:
PCT/JP2023/009032
Publication Date:
October 05, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
SONY GROUP CORP (JP)
International Classes:
G11B5/708; G11B5/738; G11B5/84; G11B23/037
Domestic Patent References:
| WO2021065019A1 | 2021-04-08 | |||
| WO2007114395A1 | 2007-10-11 |
Foreign References:
| JP2017041296A | 2017-02-23 | |||
| JP2011028826A | 2011-02-10 |
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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