US 12,250,802 B2
Differential signal transmission cable
Kengo Goto, Osaka (JP); Akihisa Hosoe, Osaka (JP); Yuto Kobayashi, Kanuma (JP); and Yuji Ochi, Kanuma (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/792,492
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jan. 30, 2020, PCT No. PCT/JP2020/003326
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/152757, PCT Pub. Date Aug. 5, 2021.
Prior Publication US 2023/0056385 A1, Feb. 23, 2023
Int. Cl. H01B 7/00 (2006.01); H01B 3/44 (2006.01); H01B 11/00 (2006.01); H01B 13/22 (2006.01); H05K 9/00 (2006.01)
CPC H05K 9/0098 (2013.01) [H01B 3/441 (2013.01); H01B 11/002 (2013.01); H01B 13/222 (2013.01); H05K 9/0088 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A differential signal transmission cable comprising:
an insulation layer extending in a longitudinal direction of the differential signal transmission cable;
a pair of signal lines extending in the longitudinal direction and buried inside the insulation layer;
an intermediate layer covering an outer circumferential surface of the insulation layer;
a shield covering an outer circumferential surface of the intermediate layer; and
catalyst particles,
wherein
the shield includes an electroless plating layer covering the outer circumferential surface of the intermediate layer, and
the catalyst particles are dispersed between the intermediate layer and the electroless plating layer such that the catalyst particles are not in the form of a layer, and an area of the outer circumferential surface of the intermediate layer in which catalyst particles are not placed is not less than 90% of the area of the entire outer circumferential surface of the intermediate layer.