US 11,718,118 B2
Recording medium, exterior member, and method of recording on recording medium
Mitsunari Hoshi, Kanagawa (JP)
Assigned to Sony Corporation, Tokyo (JP)
Appl. No. 16/956,228
Filed by Sony Corporation, Tokyo (JP)
PCT Filed Nov. 28, 2018, PCT No. PCT/JP2018/043691
§ 371(c)(1), (2) Date Jun. 19, 2020,
PCT Pub. No. WO2019/124003, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 2017-243544 (JP), filed on Dec. 20, 2017.
Prior Publication US 2021/0078349 A1, Mar. 18, 2021
Int. Cl. B41M 5/30 (2006.01); B41M 5/42 (2006.01); B41M 5/46 (2006.01); G11B 7/24038 (2013.01); G11B 7/244 (2006.01); G11B 7/2578 (2013.01); G11B 7/0045 (2006.01); B41M 5/327 (2006.01); B41M 5/333 (2006.01); G11B 7/254 (2013.01)
CPC B41M 5/42 (2013.01) [B41M 5/426 (2013.01); B41M 5/46 (2013.01); G11B 7/00455 (2013.01); G11B 7/244 (2013.01); G11B 7/24038 (2013.01); G11B 7/2578 (2013.01); B41M 5/305 (2013.01); B41M 5/3275 (2013.01); B41M 5/3335 (2013.01); B41M 5/465 (2013.01); B41M 2205/04 (2013.01); B41M 2205/38 (2013.01); G11B 2007/25408 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A recording medium comprising:
a recording layer that includes a heat-sensitive color-developing composition and a photothermal conversion material, the photothermal conversion material absorbing a wavelength in an infrared region and generating heat; and
an optical thin film that is provided on one surface of the recording layer, the optical thin film reflecting the wavelength in the infrared region and transmitting a wavelength in a visible region,
wherein the optical thin film includes two kinds of inorganic films that are alternately laminated, the two kinds of inorganic films having respective refractive indices different from each other in a wavelength range from the infrared region to the visible region.