US 12,148,979 B2
Transparent antenna and RF tag
Fujito Yamaguchi, Tokyo (JP); and Akira Ikeda, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/799,373
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Feb. 8, 2021, PCT No. PCT/JP2021/004675
§ 371(c)(1), (2) Date Aug. 12, 2022,
PCT Pub. No. WO2021/161972, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-022882 (JP), filed on Feb. 13, 2020.
Prior Publication US 2023/0056766 A1, Feb. 23, 2023
Int. Cl. H01Q 1/22 (2006.01); G06K 19/077 (2006.01); H01Q 1/38 (2006.01); H01Q 7/00 (2006.01)
CPC H01Q 1/2225 (2013.01) [G06K 19/0775 (2013.01); G06K 19/07773 (2013.01); H01Q 1/38 (2013.01); H01Q 7/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A transparent antenna comprising
a transparent base material,
an antenna part, and a joint part electrically bonded to the antenna part, the antenna part and the joint part being arranged on the transparent base material, wherein
the joint part has a first conductive pattern and a first opening part without the first conductive pattern formed thereon,
the antenna part has a second conductive pattern and a second opening part without the second conductive pattern formed thereon,
a surface free energy E1 of the first conductive pattern is 60 mJ/m2 or less, and
a surface free energy E0 of the transparent base material at the first opening part is larger than the surface free energy E1.