The present invention relates to a high speed transmission cable that includes a first conductor set, a dielectric film at least partially concentrically disposed around the first conductor set and a pinched portion forming an insulating envelope around the first conductor set. The dielectric film includes a base layer having a plurality of first protrusions formed on a first major surface of the base layer, wherein the dielectric film is disposed such that the base layer is partially concentric with the conductor set and wherein a portion of the first protrusions is disposed between the first conductor set and the base layer in a region where the base layer is concentric with the first conductor set.

A cable is composed of a linear shape conductor, a first electrical insulating member coating a periphery of the conductor, a shield made of a plating layer coating a surface of the first electrical insulating member, a second electrical insulating member coating a surface of the shield, and an exposed shield portion provided in at least one end portion of the cable with the second electrical insulating member being removed therefrom and the shield being exposed therein during termination. An adhesion strength between the shield and the second electrical insulating member in the exposed shield portion is lower than an adhesion strength between the shield and the second electrical insulating member in an other part of the surface of the shield.

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 1, the center-to-center spacing of the insulated conductors of the second conductor set is 2, and 1/2 is greater than 0.7.

A high-speed flat cable having a better bending/folding memory and a manufacturing method thereof are provided. The high-speed flat cable includes a plurality of shielded signal units, one or more bendable composite layers, and an adhesive layer. The shielded signal units are substantially coplanar, spaced apart from each other or adjoining each other. The one or more bendable composite layers includes an inner insulating film layer, a bendable aluminum foil layer, and an outer insulating film layer. The one or more bendable composite layers composed of the inner insulating film layer, the bendable aluminum foil layer, and the outer insulating film layer increase its mechanical bending/folding property to improve the bending/folding memory. The one or more bendable composite layers allow the flat cable to be bent with ease without rebounding, thereby enhancing production efficiency.

Ribbon cables including a plurality of spaced apart substantially parallel conductors extending along a length of the cable and arranged along a width of the cable, and first and second insulative layers disposed on opposite sides of and substantially coextensive with the plurality of conductors along the length and width of the cable are described. Each insulative layer may be adhered to the conductors and may include alternating substantially parallel thicker and thinner portions extending along the length of the cable. The thicker portions of the first and second insulative layers are substantially aligned in one to one correspondence. Each corresponding thicker portion of the first and second insulative layers have at least one conductor in the plurality of conductors disposed therebetween. The thicker portions may have an effective dielectric constant less than 2.

A ribbon cable with a plurality of spaced apart substantially parallel insulated conductors. The parallel insulated conductors extend along a length of the cable and arranged along a width of the cable. Each insulated conductor has a central conductor surrounded by a structured insulative material formed directly onto the central conductor along substantially the entire length of the cable. The structured insulative material has a plurality of ridges extending from the central conductor along different azimuthal directions. Each pair of adjacent ridges define an angle there between greater than about 10 degrees.

A shielded electrical cable includes conductor sets extending along a length of the cable and spaced apart from each other along a width of the cable. First and second shielding films are disposed on opposite sides of the cable and include cover portions and pinched portions arranged such that, in transverse cross section, the cover portions of the films in combination substantially surround each conductor set. An adhesive layer bonds the shielding films together in the pinched portions of the cable. A transverse bending of the cable at a cable location of no more than 180 degrees over an inner radius of at most 2 mm causes a cable impedance of the selected insulated conductor proximate the cable location to vary by no more than 2 percent from an initial cable impedance measured at the cable location in an unbent configuration.

A cable includes one or more conductor sets, one or more dielectric unitary blocks or reservoirs, first and second conductive shielding films disposed on opposite first and second sides of the conductor sets and the dielectric blocks or reservoirs, and an adhesive layer. The shielding films include cover portions and pinched portions arranged such that, in cross-section, the cover portions of the shielding films in combination substantially surround each conductor set and each unitary block or reservoir, and the pinched portions of the shielding films in combination form pinched portions of the cable on each side of the conductor set and on at least one side of the unitary block or the reservoir. The adhesive layer bonds the first shielding film to the second shielding film in the pinched portions of the cable.

A cable includes a first metal conductor, a first insulator, a second metal conductor and a second insulator. The first insulator is at least partially wrapped on the first metal conductor. The second insulator is at least partially wrapped on the second metal conductor. The first metal conductor is adapted to transmit a first signal. The second metal conductor is adapted to transmit a second signal. The cable also includes an intermediate layer material at least partially wound on the first insulator and the second insulator. A dielectric constant of the intermediate layer material is lower than that of the first insulator, and the dielectric constant of the intermediate layer material is lower than that of the second insulator. With this arrangement, the cable of the present disclosure is capable of realizing low mode conversion and improving the high frequency characteristics.

A dual-axial cable may include adjacent and substantially parallel first and second wires, each wire formed from an electrical conductor surrounded by a respective first and second electrical insulator having a lengthwise flat face outward side and having respective first and second inward sides of an interlocking structure, the first and second inward sides of the interlocking structure of the first and second electrical insulators mutually engaging to prevent a relative transverse displacement of the first and second wires and maintaining planar alignment of the flat face and electrical conductor of the first and second wires and to maintain the flat faces parallel to one another. The dual-axial cable may also include first and second drain conductors formed respectively on the flat faces of the first and second electrical insulators and running adjacent and substantially parallel to the first and second electrical conductors.