Title:
RECORDING MEDIUM, INFORMATION RECORDING METHOD, AND INFORMATION READING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/238487
Kind Code:
A1
Abstract:
A recording medium 100 according to one aspect of the present disclosure comprises a first dielectric layer 20A, a second dielectric layer 20B, and a recording layer 10. The recording layer 10 has a recording region for recording information through irradiation with light. The light reflectance of the recording region in which information has been recorded is higher than the light reflectance of the recording region before recording information. The thickness D (nm) of the recording layer 10, the refractive index n1 of the recording layer 10, the refractive index n2 of the first dielectric layer 20A, and the refractive index n3 of the second dielectric layer 20B satisfy relational expressions (1) to (3). (1): (1.33 - 0.15n1) {405(m + 1/2)/(2n1)} < D ≤ (1.33 - 0.15n1) {405(m + 1)/(2n1)} (2): n1 > n2 (3): n1 > n3 In formula (1), m is an integer of 0 to 4.
Inventors:
ANDO KOTA
YOKOYAMA MASAKO
TAGASHIRA KENJI
ARASE HIDEKAZU
YOKOYAMA MASAKO
TAGASHIRA KENJI
ARASE HIDEKAZU
Application Number:
PCT/JP2023/013662
Publication Date:
December 14, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G11B7/24035; G11B7/004; G11B7/2403; G11B7/24038; G11B7/24044; G11B7/244; G11B7/246
Domestic Patent References:
| WO2003085657A1 | 2003-10-16 | |||
| WO2007123065A1 | 2007-11-01 | |||
| WO2006118164A1 | 2006-11-09 | |||
| WO2012008293A1 | 2012-01-19 |
Foreign References:
| JP2010086568A | 2010-04-15 | |||
| JP2002334480A | 2002-11-22 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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