Abstract:
A contact bridge arrangement in a housing of an electronic assembly provides a simplified electrical interconnection of circuit boards while avoiding the need of electrical plugs, sockets and connector cables for connecting the circuit boards. The contact bridge includes an insulating block provided on the floor of the housing, and a plurality of conducting connectors embedded in the insulating block. First electrical contacts, such as contact pads with holes therein, are provided on the circuit boards, and engage the second electrical contacts in the form of contact pins provided by the free ends of the conducting connectors protruding from the insulating block. Assembling the arrangement simply requires pressing the circuit boards onto the contact pins of the contact bridge. The insulating block of the contact bridge may have a step configuration providing two offset flat support surfaces on which two circuit boards may be supported one above the other with a spacing therebetween.
Abstract:
An electronic control board assembly has a large-current control unit and a small-current control unit connected to the large-current control unit. The large-current control unit has an insert-molded board with lead frames embedded therein. The insert-molded board has a first component mounting surface and a first component soldering surface facing away therefrom. A first group of components are mounted on the first component mounting surface and have leads extending through the insert-molded board and soldered to the lead frames. The small-current control unit has a printed wiring board which has a second component mounting surface and a second component soldering surface facing away therefrom. A second group of components are mounted on the second component mounting surface and have leads extending through the printed wiring board and soldered to interconnections patterned on the second component soldering surface. The lead frames have ends extending through the printed wiring board and soldered to the interconnections. The first component soldering surface and the second component soldering surface face outwardly.
Abstract:
An electrically connectable module is manufactured from a substrate of an electrically insulating polymer matrix doped with an electrically insulating fibrous filler capable of heat conversion to an electrically conductive fibrous filler to form a fiber-doped substrate. One end of an electrical connector is embedded in the fiber-doped substrate to locate the one end adjacent the surface of the substrate while exposing an opposite end of the electrical connector. The surface of the fiber-doped substrate is locally heated preferably with a laser to form a conductive trace by the in-situ heat conversion of the electrically insulating fibrous filler, the localized heating including the one end of the electrical connector to electrically connect the electrical connector to the conductive trace. In another embodiment, a conductive material is electrodeposited on the conductive trace by applying a voltage to the opposite end of the electrical connector. The substrate is molded into a desired shape to form the module, and a plurality of electrical connectors can be embedded into the substrate in any one of several different standardized arrangements.
Abstract:
There is disclosed a high density electronic connector system in which a plastic insulating body supports on one or more levels a plurality of conductive circuit traces. Output contacts to these traces are provided by small metal balls. The metal balls are driven into tight contact with respective ones of the conductive traces and captivated by the plastic body. The balls are covered with gold and provide miniature, wear resistant closely spaced output contacts in the connector system. A ball may contact conductive traces on two levels of the insulating body and thereby provide an electrical connection between conductive traces. A method of manufacture of the connector system includes the steps of heating the plastic body to an elevated temperature, and driving the small metal balls through or against a respective conductive trace and into the plastic body which thereby captivates it. The conductive traces may be solder plated. After a ball is seated in contact with a conductive trace, the solder plating may be reflowed.
Abstract:
A fan control board and circuit having a central low voltage wiring center as well as a safety interlock for electric heater in which the interlock uses diodes to ensure proper fan operation in the event of miswiring of the heater sequencers. Another feature of the invention is a quick connect for a time delay of the circuit which permits easy insertion and removal thereof for replacement and/or cleaning.
Abstract:
A method of producing a metallized pattern on a substrate includes the steps of providing a substrate having a high aspect ratio groove defining a desired metallization pattern and applying metallization to the substrate. The high aspect ratio groove is utilized to prevent metallization across the groove boundary thereby producing electrically isolated areas. The substrate can be a circuit board, hybrid module or other component carrying structure. Also the substrate can be a resonator or a stripline device in which the groove is used to electrially isolate a lead or wire extending from the substrate in the ground plane portion of the structure.
Abstract:
According to the present invention, a circuit board for mounting electronic components wherein a metal layer united with a substrate layer has a predetermined portion exposed is manufactured by:(1) arranging a mask between the substrate layer and a part of the metal layer to become the exposed part, and thereafter unitizing the substrate layer with the metal layer;(2) projecting a laser beam onto that part of the substrate layer on the metal layer which surrounds the mask, in a direction from a side of the substrate layer to a side of the metal layer, thereby to cut away the part of the substrate layer surrounding the mask; and(3) stripping off that part of the substrate layer which remains on the mask, together with the mask.
Abstract:
According to the present invention, a circuit board for mounting electronic components including a metal layer united with a substrate layer with a predetermined portion of the metal layer exposed is manufactured by disposing a mask between a substrate layer and a metal layer where the metal layer is to be exposed and uniting the substrate layer and the metal layer with the mask therebetween, projecting a laser beam onto the substrate layer at the periphery of the mask to cut away the substrate layer adjacent to the mask, and stripping off that part of the substrate layer which remains on the mask and the mask.
Abstract:
In a circuit board wherein a plurality of leads 21 electrically independent of one another protrude from a base member 10, and the respective leads 21 are electrically connected with connection portions 31 of an electronic component 30 mounted on the base member 10; an electronic component mounting circuit board 100 characterized in that internal connection portions 22 are unitarily formed on inner sides of metal members 20 constructing said respective leads 21, that the base members 10 are integrally disposed on both surfaces of said internal connection portions 22, that the electronic components 30 are mounted on said base members 10, and that said electronic components 30 and said internal connection portions 22 are electrically connected. Thus, according to the present invention, it is possible to provide a simply constructed electronic component mounting circuit board which facilitates the design of circuits, which dispenses with the resin molding of the connected portions between the electronic components and the respective leads and affords excellent connection reliability, which can readily form a heat radiating structure, and in which the thermal matching with the electronic components is excellent.
Abstract:
An adapter substrate (40) for carrying one or more electrical components (80,90), includes plated circuitry to which the components are connectable, to comprise a member securable between a chip carrier socket (20) and a printed circuit panel (14) and provide electrical interconnection therebetween. The electrical components are connected to selected ones of the interconnections between the socket and the panel in order to modify, effect or sense the selected interconnections. While the other interconnections are passed through the substrate such as by plated through-holes (44), the selected interconnections are interrupted by the dielectric material of the substrate (40) and are plated blind holes (46) connected by path segments (120) to be electrically connected to the one or more electrical components; completing the connection to the socket's contacts are plated through-holes (116) and path segments (128) to contact pads (52). Into the plated through-holes and plated blind holes alike can be inserted post members (42) matable with plated through-holes (16) of the panel; contact sections connectable with the socket's contacts (28 ) can be pads (52) for surface mounting. One such adapter can be used to fabricate an assured backup power supply (10) for an IC chip carried in the socket (20), when a battery (80) and a logic chip control circuit (90) therefor are the electrical components.