High density shielded electrical cable and other shielded cables, systems, and methods

Patent metadata

Field	Value
Publication number	US-11664137-B2
Application number	US-202217715364-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Aug 31, 2010
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A shielded electrical ribbon cable includes adjacent first and second longitudinal conductor sets where each conductor set includes two or more insulated conductors. The first conductor set also includes a ground conductor that generally lies in the plane of the insulated conductors of the first conductor set. At least 90% of the periphery of each conductor set is encompassed by a shielding film. First and second non-conductive polymeric films are disposed on opposite sides of the cable and form cover portions substantially surrounding each conductor set, and pinched portions on each side of each conductor set. When the cable is laid flat, the distance between the center of the ground conductor of the first conductor set and the center of the nearest insulated conductor of the second conductor set is σ1, the center-to-center spacing of the insulated conductors of the second conductor set is σ2, and σ1/σ2 is greater than 0.7.

First claim

The invention claimed is:

1. A shielded electrical ribbon cable comprising:
adjacent first and second conductor sets extending lengthwise along the cable, each of the first and second conductor sets including two or more insulated conductors, the first conductor set comprising a ground conductor generally lying in a plane of the two or more insulated conductors of the first conductor set, at least 90% of a periphery of each of the first and second conductor sets encompassed by a shielding film; and
a non-conductive polymeric layer covering opposite sides of the first and second conductor sets and including cover portions arranged such that, in a transverse cross section, the cover portions of the polymeric layer substantially surrounds each of the first and second conductor sets;
wherein, when the cable is laid flat, a distance between a center of the ground conductor of the first conductor set and a center of the nearest insulated conductor of the second conductor set is σ 1 , a center-to-center spacing of the insulated conductors of the second conductor set is σ 2 , σ 1 /ρ 2 being greater than 0.7.

2. The shielded electrical ribbon cable of claim 1 , wherein an adhesive layer bonds each of the first and second conductor sets to the shielding film encompassing the at least 90% of the periphery of the conductor set.

3. The shielded electrical ribbon cable of claim 1 having a skew of less than 10 psec/meter.

Assignees

• 3M Innovative Properties Company

Inventors

• Gundel Douglas B
• Edwards Rocky D
• Lettang Mark M
• Staley Charles F

Classifications

• H01B11/203

  forming a flat arrangement · CPC title

• H01B11/1891

  comprising auxiliary conductors · CPC title

• H01B7/0861

  comprising one or more screens · CPC title

• H01B11/002

  Pair constructions · CPC title

• H01B7/0838 Primary

  Parallel wires, sandwiched between two insulating layers · CPC title