Abstract:
A coupling and grounding structure of a plasma display device for grounding a circuit board effectively, and fixing the circuit board stably. The plasma display device includes a plasma display panel having a display area, on which images are displayed; a chassis base coupled to a back surface of the plasma display panel; at least one circuit board, on which at least one electronic element for driving the plasma display panel is mounted, the circuit board having a conductive portion and at least one coupling hole to be coupled to the chassis base by a bolt member penetrating the coupling hole; and at least a conductive member which contacts the conductive portion and the bolt member in the coupling hole.
Abstract:
A semiconductor module includes a circuit board provided with a plurality of attachment holes and semiconductor elements or semiconductor devices mounted on the circuit board and a pair of metallic plates. The circuit board is disposed, between the pair of metallic plates, in such a manner that spaces are defined between the circuit board and the pair of metallic plates for accommodating the semiconductor elements or semiconductor devices when the pair of metallic plates are attached to the circuit board. One of the metallic plates is provided at positions corresponding to the attachment holes with through holes and the other metallic plate is provided at positions corresponding to the attachment holes with tubular projections having a length larger than a sum of a thickness of the circuit board and a thickness of the one metallic plate. The tubular projections are inserted into the attachment holes and the through holes and tip ends of the tubular projections are enlarged to firmly attach the pair of metallic plates to the circuit board.
Abstract:
A method for providing pre-placed, pre-brazed feed throughs in the substrate of a hermetic package corresponding to the terminal leads of the encased circuit COTS components. The substrate may include directly bonded copper (DBC) regions forming circular shapes where the holes for the special connectors of the present invention will be located. These holes will correspond to the leads of the COTS component that will be mounted to it. Holes are laser or mechanically drilled into the substrate inside the circular shapes formed in the DBC. To form the feed through, a bushing, such as a blind copper rivet, is brazed in the hole, with the open end thereof oriented toward the component-side of the substrate. These open ends can accept the leads of the COTS component, like the holes of a conventional PC circuit board.
Abstract:
An electrical contact facilitates making a soldered connection between an insulated wire conductor and a circuit board. The contact includes a tubular contact body having a hollow interior. One end of the contact body has an insulation piercing edge which promotes penetration of the contact body through the insulation of the wire conductor and into the conductive core when the wire conductor is pressed against the edge of the contact body. The other end of the contact body is solderable to a circuit board. The hollow interior permits solder to be drawn by capillary action through the contact body and into the wire conductive core.
Abstract:
A flexible circuit board includes a plurality of discrete circuits for use with different types of rechargeable battery packs. Conductive traces formed on the circuit board include gaps which cause certain portions of the circuitry to be disconnected from the circuit rendering that portion of the circuit inactive. The process of bridging the gaps by attaching one or more components over the gaps causes the corresponding inactive portion of the circuit to be activated. By selectively activating certain portions of the circuit, a desired result is obtained.
Abstract:
A through-hole pin connection for laminated circuit elements and method of connection are presented. The laminated circuit element consists of a plurality of individual circuit elements, each element having a land area about the periphery of the through-hole. The through-hole pin has at least one ridged region located along the direction of insertion into the through-hole. Upon insertion, the pin guides a solder into the land areas and the ridged region effects electrical and mechanical contact between the through-hole pin and each of the land areas of the laminated circuit element.
Abstract:
This invention generally relates to prefabricated electric wire assemblies comprising an interconnected network of separately formed, integral, shaped conductors, and to materials and techniques used in the manufacture of such assemblies.
Abstract:
Termination means for each lead of a cordwood module which permits easy removal of the module from a circuit board on which it is mounted. The termination means includes a conductive cylinder which is placed over the lead and which is fixed to the circuit board, by soldering, on the side of the circuit board remote from the module. The lead is then soldered to the termination means at its end remote from the module, thereby providing a mechanical and electrical connection between the lead and the circuit board. The termination means is so constructed that, when a cut is made between the two solder joints, the lead is released from the board.