Abstract:
A zero insertion force (ZIF) connector for connecting a flat flexible cable (FFC) to contacts of a printed circuit board (PCB) comprising first and second housings which are relatively moveable between an unlocked state in which an FFC may be freely inserted into the housings for engagement with the contacts and a locked state in which the conductors of the FFC are captively engaged in electrical contact with the contacts; a latch system interconnecting the housing to latch the housings in their unlocked and locked state; and contact and FFC conductor guidance ribs sized and spaced to align the FFC conductors and the contacts for electrical connection of each conductor with an associated contact.
Abstract:
A low cost, high energy direct circuit to circuit stored energy connector is disclosed. The connector precisely aligns and interconnects conductors of "flexible circuits" directly to mating contacts on printed circuit boards. The connector uses the flexible circuit conductors themselves to aid in alignment and eliminates the need for precise control of the outside dimensions of a flexible circuit's dielectric backplane or a precisely located alignment hole. The connector is a zero insertion force (ZIF) type, and is a high density surface mount. The connector comprises two major components: a connector housing and a circuit interconnection spring assembly. The housing is configured with a device for forming a direct flexible circuit conductor to printed circuit board mating contact interconnection. The circuit is retained in position by a multi-function spring assembly rotatably positionable with respect to the housing. Rotation of the spring assembly from an open to a shut position allows the spring assembly to: a) work in conjunction with the housing to positively align the circuit in position, b) pull the circuit into position within the housing, c) ensure adequate force is applied to the circuit's dielectric backplane behind each of the circuit's conductors to guarantee proper electrical connection between the circuit and the printed circuit board, and d) provide a ground return from the circuit to the printed circuit board.
Abstract:
A fusible printed circuit includes one or more conductors extending along a dielectric substrate. The circuit can be flexible or rigid. Each conductor is comprised of a layer of electrically conductive material and has one or more gaps formed in the conductive layer at locations opposite a segment of the fusible material so that electrical current flowing through each conductor is required to pass, in its entirety, through the segment of fusible material at the location of each gap in the layer of conductive material. The integral fuses are designed to specific electrical parameters and may be located randomly along circuit runs. The fusible material is cold welded to the conductors at the gaps. Pressure concentrators support the fuses and minimize motion stress on the fuses. The fuses can be sealed within a protective overlay which captures debris when the fuses are blown and controlled venting of the debris can also be provided. The use of such a circuit to incorporate a variety of fuses having different fuse ratings into the conductive paths of a printed circuit is also disclosed, as are methods of making fusible flexible circuits.
Abstract:
A circuit to printed circuit board stored energy connector. The connector precisely aligns and interconnects conductors of “flexible circuits” (including conductive ink circuits (CIC), flexible printed circuits (FPC), and/or flat flexible cables (FFC)) directly to mating contacts on printed circuit boards. The connector is a zero insertion force (ZIF) type, and is a high density surface mount. The connector comprises mainly an actuator with an activation ridge, a deflectable flat spring contact in a spring support module, and circuit alignment features that use the flexible circuit's existing features—the outline and conductors—to accurately align the conductors of the flexible circuit to their corresponding mating spring contacts. The connector also includes circuit locators, a circuit compression flap and conductor alignment notches which work cooperatively to align and interconnect a flexible circuit to its spring contact. The connector provides a micro-wiping action that will not damage the flexible circuit, and also provides secure connection with a two point, redundant contact.
Abstract:
Methods of facilitating commercial production of supported conductive networks without the use of hazardous chemicals including using heat flowable adhesive in the formation of the networks, providing contact pads exposed through a dielectric substrate which supports a conductive network, using the thickness of a conductor supporting dielectric layer to space the conductors and providing conductor and waste material cross-sections trapezoidal in shape in a non-planar pattern during manufacture of the networks.
Abstract:
A conductive network, which can be flexible or rigid, can have self-aligning conductors which connect with corresponding conductors of other networks. The conductive network can be fabricated into densely packed contact clusters for use as electrical interconnectors or circuits. The contact clusters, which can be configured to substantially any shape, are the essential components of high density connector assemblies. The methods and apparatus for making the conductive network and cluster contacts are also described.
Abstract:
A connector assembly for connecting a flexible printed circuit or flat conductor tape cable with exposed terminal pads to the thru-hole terminals of a PC board or second flexible printed circuit includes a socket and conductive posts. Corresponding first ends of the posts project into the socket and corresponding second ends of the posts project from the bottom of the header for insertion into the PC board or second flexible printed circuit terminals. A connector is mounted to the end of the flexible circuit or flat conductor tape cable and it has post-receiving passages for receiving the post first ends so that those ends are electrically connected to the terminals pads of the flexible circuit or flat conductor tape cable when the connector is inserted into the header socket. Provision is also made for locking the connector in the header socket.
Abstract:
In a flexible circuit connector assembly, a first circuit has exposed contacts which are positioned in register with the termination pads of another circuit by means of a connector which mechanically clamps the two circuits together. The connector includes a frame having an undersurface to which the first circuit is affixed. Locating posts project from that surface and are received in locating apertures in the second circuit to properly position the connector and the attached circuit relative to the second circuit. A generally C-shaped spring member engages around the frame with its arms extending beyond the locating posts and with its bridging segment extending more or less perallel to the frame reference surface. An actuator mounted to the frame is movable between a releasing position wherein it deflects the spring bridging segment toward the frame reference surface to spread apart the arm hooks so that they are aligned with the locating posts, thereby permitting those posts to be inserted into the circuit apertures.
Abstract:
Methods of facilitating commercial production of supported conductive networks without the use of hazardous chemicals including using heat flowable adhesive in the formation of the networks, providing contact pads exposed through a dielectric substrate which supports a conductive network, using the thickness of a conductor supporting dielectric layer to space the conductors and providing conductor and waste material cross-sections trapezoidal in shape in a non-planar pattern during manufacture of the networks.
Abstract:
A process and apparatus for producing supported conductive networks which can be flexible or rigid, having densely packed circuits. The process and apparatus for making the conductive network involves forming a conductive material supported on a "dynamic pressure cushion" into a non-planar pattern defining the desired conductive circuits in relation to a fixed reference plane. The "dynamic pressure cushion" is a material having suitable viscosity and flow characteristics to flow out from under the conductive material as it is being formed and fill up any voids. To ensure that the "dynamic pressure cushion" properly flows without deforming the desired circuits, the die used to form the conductive material is provided with a material flow control grid and material expansion troughs. After forming the unwanted material is then mechanically removed in dimensional relation to the reference plane leaving the desired conductive circuits.