Abstract:
A coaxial connector mounts directly to a planar substrate of a circuit module and is oriented perpendicularly to the substrate. A radially symmetric coaxial structure, maintained through a conductive bore in the substrate provides a good impedance match to a planar transmission line on the substrate. A flange of the coaxial connector provides the mating surface to the substrate. A nipple formed on the flange fits in the conductive bore, aligning the center conductor in the conductive bore and maintaining the coaxial structure. A bond connects the center conductor to a microstrip transmission line on the top of the substrate. In a first preferred embodiment of the present invention, a threaded flange receives a threaded coaxial bead to form the coaxial connector. In a second preferred embodiment a coaxial cable is soldered into a smooth flange to form a coaxial connector. In a third preferred embodiment a coaxial bead and a flange are integrated to form the coaxial connector. The outer conductor of the bead is continuous with the flange while the center conductor of the bead protrudes through a hole in the flange.
Abstract:
A wire harness includes a main circuit part 1 including an insulated conductor wiring circuit plate 3 in which conductors 8 are arranged on a base insulation film 9 to form a wiring circuit by turning, bowing, crossing, or branching the conductors and covered with a flexible insulation film 12. Further, a branched connection part 2 is provided including a printed circuit plate 4 connected to a connecting area 14A in the main circuit part 1 through a connecting area 14B formed thereon and adapted to receive leading electrical wires 5. The conductor wiring circuit plate 30 is a flexible circuit plate which has an insulation base film 33, conductors 31 juxtaposed on the base film, an upper coverlet film 32, and a connecting area 36 for the conductors 31 having an adhesive layer 37 on the back side of the film 32. The connecting area 36 is formed by removing a predetermined width 38 of the base film 33 along the lateral direction of the coverlet film 32.
Abstract:
An SCSI cable assembly (30) with a termination circuit included within one of the connector housings (44) is disclosed. The termination circuit is on a circuit board (52) that is retained within a cavity (68) between two solder nest halves (50). The solder nest halves (50) have a plurality of openings (70) that are in alignment with contact pads (54) on a surface of the circuit board (52). Solder segments (100) are arranged within the openings (70), and conductors (48) of a cable (32) are individually inserted into the openings in thermal engagement with the solder segments to form a solder nest assembly (40). An electrical connector (42) having a plurality of contact leads (58) spaced similarly to the spacing of the openings (70) is assembled to the solder nest assembly so that each lead (58) is in thermal engagement with a respective conductor (48) in a respective opening (70). Each lead (58) is attached to a common carrier strip (104) which is a self regulating temperature heater. The heater is activated by application of an RF current to reflow the solder segment (100) thereby electrically connecting the leads (58) to their respective conductors (48) and contact pads (54).
Abstract:
A device 10 usable in conjunction with a source of constant amplitude high frequency alternating current of known frequency for providing sufficient thermal energy to melt a fusible electrically conductive material 32 includes an integral member formed from strip 12 of a first metal having a carrier strip section 14 and a plurality of fingers 20 initially integrally coextending therefrom. The carrier strip section 14 further has a thin magnetic layer 18 thereon, transforming the carrier strip into a Curie point heater. The fingers 20 including end portions 22 having layers of solder affixed to opposite sides thereof are adapted to receive bare end portions of conductors 36 inserted into slots 28 thereof. The device 10 and the conductors 36 disposed therein are placed on the board 50 with the respective conductors 36 opposed from respective contact pads 52 and separated by the finger end portions 22. Upon subjecting the heater body 14 to the constant current of known frequency, the heater body 14 generates and transfers sufficient thermal energy to the finger end portions 22 to melt the fusible material 32 disposed therealong thereby electrically and mechanically interconnecting the array of conductors to the contact pads 52. The heater body 14 is then detached from the fingers 20 thereby electrically isolating the interconnections.
Abstract:
A connecting system for making electrical connections between a multiple conductor cable and a printed circuit board. A plurality of connector pins is mounted in a regularly spaced array on the printed circuit board and projecting above a first surface of the board. No other elements are mounted on the printed circuit board which are dedicated solely to the connecting system. Instead, a plurality of electrical components which are mounted on the circuit board for performing circuit functions, are mechanically positioned to surround the pins to provide an internal periphery of predetermined size, shape, and keyed configuration. The keyed periphery closely matches the outer periphery of a connector body attached to the cable. Thus, the electrical components on the circuit board key the connector body to the circuit board such that misplugging is avoided. The elimination of a board mounted connector body, and the close proximity of the electronic components required to perform their keying function, substantially increases circuit board density.
Abstract:
A high circuit density printed circuit board is manufactured on a metal substrate by building a layer of photoimageable dielectric on the metal substrate and then imaging the dielectric in a manner so as to create wells for active components which are mounted directly on the metal substrate for the purpose of heat dissipation. The build up of the dielectric layer can be improved to provide circuit traces such as, for example, buried coaxial cables prior to the imaging process to achieve even higher density with conventional circuit boards.
Abstract:
A heated tool for soldering objects to a plurality of pads which are spaced apart by a selected pitch, comprises a tool member having a heating surface with a plurality of spacer bars thereon, spaced by the pitch between the pads. The spacer bars act to separate one pad from the other to avoid the flow of solder between the pads.
Abstract:
A flat multiconductor jumper cable comprises a plurality of elongate substantially parallel and transversely spaced conductors surrounded by a casing of insulation. At one or both ends of the jumper cable, exposed portions of the conductors are formed in a curved clipped portion for solder connection to an integrated circuit substrate. The conductors are preferably formed of a soft non-resilient material such as copper and the clip portion is provided to have a substantially circular cross-section. The clip portion, formed in a generally U-shaped configuration defines a pocket for receipt therein of the edge of a substrate having conductive pads on opposing surfaces. Upon soldering the clip portion to the conductive pads, solder fillets are formed in such a manner as to provide an enhanced electrical and mechanical joint.
Abstract:
An electrical jumper cable comprising a plurality of spaced metallic conductors is formed from a rigid metallic sheet by selectively reducing the sheet in cross-section so as to define conductor patterns and integral terminal ends, and to render flexible areas of the conductors. The metallic conductors are laminated to flexible insulating films which support the conductors and maintain the conductors in spaced relation to one another.
Abstract:
An interconnector for providing coupling between an integrated circuit pin connector, a socket connector which may be part of a printed circuit board, and a cable. Some pins of the pin connector connect directly with sockets of the socket connector, other pins and sockets are coupled to the cable. When used in an in-circuit emulator for a microcomputer, the interconnector permits the CPU or microprocessor to be physically located on the microcomputer's circuit board during testing of the microcomputer. Some of the signals which normally flow between the CPU or microprocessor and the remainder of the microcomputer are diverted to the cable. This permits sensing of signals intended for the CPU or microprocessor and the substitution of other signals in place of the sensed signals.