US 12,112,780 B2
Recording medium, information recording method, information reading method, and composition for producing recording layer
Kota Ando, Osaka (JP); Masako Yokoyama, Osaka (JP); Naoya Sakata, Hyogo (JP); Kenji Tagashira, Osaka (JP); and Hidekazu Arase, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Nov. 10, 2023, as Appl. No. 18/506,171.
Application 18/506,171 is a continuation of application No. PCT/JP2022/020309, filed on May 16, 2022.
Claims priority of application No. 2021-094058 (JP), filed on Jun. 4, 2021.
Prior Publication US 2024/0119965 A1, Apr. 11, 2024
Int. Cl. G11B 7/245 (2006.01); C09B 69/10 (2006.01); G11B 7/2533 (2013.01)
CPC G11B 7/245 (2013.01) [C09B 69/109 (2013.01); G11B 7/2533 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A recording medium comprising:
at least one recording layer, wherein
the at least one recording layer comprises:
an aliphatic polymer; and
a multiphoton absorption compound containing at least one bond selected from the group consisting of a carbon-carbon double bond, a carbon-nitrogen double bond, and a carbon-carbon triple bond, and having a multiphoton absorption characteristic; and
when a thickness of the at least one recording layer is 100 μm, a transmittance of the at least one recording layer in a thickness direction with respect to light having a wavelength of 405 nm is greater than or equal to 80%.