A flexible flat cable (FFC) includes a first insulation layer, at least one pair of conductors, a plurality of low-k dielectric layers, two second insulation layers, and at least one shielding layer. The pair of conductors is located within the first insulation layer. Each pair of conductors includes a plurality of first conductors, and the first conductors are axially extending and arranged in parallel. The low-k dielectric layers are embedded in the first insulation layer. Each of the pair of conductors or each of the first conductors is covered and surrounded with one low-k dielectric layer. The two second insulation layers are located on two surfaces of the first insulation layer. The shielding layer is located on the two second insulation layers opposite to the first insulation layer.

The application discloses a flat cable assembly, which includes a plurality of cables arranged in a row and an insulating film. The cables have a center line and include connecting portions, a signal wire and a grounding wire respectively. The connection portions are located on one side of the center line. The insulating film is disposed on the connecting portion of any one of the cables and located on one side of the central line. The cables are exposed from the insulating film. The insulating film is disposed on a single side of the cables, whereby the cables are exposed from the insulating film. The flat cable assembly is easily manufactured and the amount of the cables therein can be varied according to real practice condition. The grounding wire is integrated to each cable, whereby the flat cable assembly has an excellent anti-EMI effect and performance in signal transmission.

Provided are flexible hybrid interconnect circuits and methods of forming thereof. A flexible hybrid interconnect circuit comprises multiple conductive layers, stacked and spaced apart along the thickness of the circuit. Each conductive layer comprises one or more conductive elements, one of which is operable as a high frequency (HF) signal line. Other conductive elements, in the same and other conductive layers, form an electromagnetic shield around the HF signal line. Some conductive elements in the same circuit are used for electrical power transmission. All conductive elements are supported by one or more inner dielectric layers and enclosed by outer dielectric layers. The overall stack is thin and flexible and may be conformally attached to a non-planar surface. Each conductive layer may be formed by patterning the same metallic sheet. Multiple pattern sheets are laminated together with inner and outer dielectric layers to form a flexible hybrid interconnect circuit.

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.

An electrical ribbon cable (110) includes an insulated conductor (114) extending along a longitudinal axis of the cable. The cable also includes a shielding film (116) that carries the insulated conductor (114). The shielding film (116) has a variable thickness defining a thickened rib portion (117) and a thinned connecting portion (118), these portions being electrically conductive and extending along the longitudinal axis. The insulated conductor (114) is disposed proximate the rib portion (117). The insulated conductor (114) may be one of multiple insulated conductors that are organized into multiple conductor sets (112) including at least a first and second conductor set, each conductor set (112) including one or more of the insulated conductors (114), and the rib portion (117) may be disposed between the first and second conductor sets.

A cable structure including at least one conductor, a cladding layer, a low dielectric constant (Dk) resin layer, and a shielding layer is provided. The cladding layer includes a low Dk adhesive layer and two insulation layers. The low Dk adhesive layer is coated around the at least one conductor. The two insulation layers respectively are adhered to two opposite surfaces of the low Dk adhesive layer. Each of the low Dk adhesive layers and the two insulation layers has a dielectric constant between 1.3 and 3. The low Dk resin layer is adhered to the cladding layer through a first adhesive layer. The shielding layer is adhered to the low Dk resin layer through a second adhesive layer. The at least one conductor is disposed in the low Dk adhesive layer and positioned between the two insulation layers.

Flexible cables may include multiple power, ground, and signal traces, and include EM interference suppression devices within the cable itself. Signal traces may be shielded by ground traces. The body of a cable may be divided into lateral portions through which different types of traces extend. One lateral side of a cable body may include a stack of power traces, while another lateral side of the cable body may include ground and signal traces. EBG patterns may be incorporated into ground traces. Capacitors may be positioned within the cable along its length, mounted between power and ground traces, for decoupling.

A flat cable (100) includes an insulative carrier (20) extending along a front-to-back direction, a set of signal conductors (10) held by the insulative carrier, and a metal grid layer (30) attached to the insulative carrier. The insulative carrier has a top face facing upwardly and a bottom face facing downwardly. The insulative carrier defines a set of receiving passageways (210) disposed along a transverse direction perpendicular to the front-to-back direction. The set of signal conductors extend along the front-to-back direction and have different pitches along the transverse direction. The metal grid layer is attached to the top face or the bottom face. The metal grid layer has different densities along the front-to-back direction in order to make the impedance of the flat cable consistent along the front-to-back direction.

A cable (100) includes a power wire (1), a ground wire (3), data transmission wires (2) between the power wire and the ground wire, and an insulating outer layer (4) enclosing the outer side of the power wire, the ground wire, and the data transmission wires. The power wire includes a conductor (11), an insulating layer (12) outside the conductor, and a metal shielding layer (13) outside the insulating layer. The power wire and the data transmission wires are spaced from each other by plastic materials.

In accordance with an embodiment, an electrical cable can be configured to electrically connect to contact pads that are carried by a substrate. The electrical cable can include at least one, such as a pair, of electrical signal conductors and at least one, for instance a pair, of electrically conductive drain wires. A drain wire in the electrical cable can define a first surface that is configured to face the signal conductors and a second surface that is opposite the first surface. The drain wire can define a width that is greater than 0.12 mm as measured from the first surface to the second surface along a straight line. At least one auxiliary wire can be attached to at least one drain wire. The auxiliary wire can be configured to attach to the substrate.