Abstract:
An electrical connector for electrically and mechanically attaching a leadless chip carrier to a printed circuit board. More particularly the connector includes a dielectric frame member having recess along the outwardly facing sides and contacts, received in the recesses, having contact sections extending above and below the frame member and outwardly therefrom for soldered engagement with respective chip carrier and circuit board. Projections extending outwardly from the recesses are received in holes in the contacts to retain the contacts in the recesses.
Abstract:
To manufacture a vibration-resistant, shock-resistant electrical connection on a ceramic substrate (11) having an electrically conductive layer (12) applied to a surface (13, 19) thereof, a groove or channel-like depression (16, 20) is formed in the surface, preferably also including a through-bore (18), into which a conductor (17) is placed. The space between the conductor and the groove, the through-bore, if provided, and an extending groove at the other surface (19) of the substrate is filled with a sinterable mass (21), preferably a cermet, containing a metal which is compatible with the metal of the conductor wire (17), both for example containing platinum. As a starting material, the plate with the grooves therein is extrusion-pressed, pre-sintered at a low temperature to give it form stability, then the electrode (12) is applied, then the electrical conductor (17) and the cermet is applied and then the entire sub-assembly is fired to sintering temperature, e.g. about 1500.degree. C.; if desired, a further protective coating (22) of magnesium spinel may be plasma-sprayed on. Due to shrinkage of the ceramic components, the wire (17) will be securely held in position in the groove, and the cermet additionally forming an electrical connection between the wire and the substrate (11). For additional strain relief, the groove can be undulating (FIG. 3).
Abstract:
A row of connectors 14 is assembled on a printed circuit board 11 by inserting a leg section 41 of each terminal 14 into a mounting aperture 32 and bending a flat contact portion 42 of each terminal 14 to fit into a pocket 47 formed in the surface of the board. Printed circuit conductors 13 are next screened onto the board 11 with a portion of the conductors positioned over some of the contact portions 42 of terminals 14 to provide edge connections for the printed circuits 12. Metal strips conductors 13 are then fastened to the board 11 and end portions thereof are welded to the contact portions 42 of other terminals 14 to provide edge connections for the metal strips conductors 13.
Abstract:
A circuit assembly as for an attenuation circuit is constructed upon a glass or ceramic substrate. T-element attenuators are formed on one face of the substrate by a film-circuit technique. Connections to electrodes of the T-element resistances are made by contact elements having clamping portions which engage an edge of the substrate to overlie the respective electrodes. One side of each contact element is extended from the clamping portion to form a contact arm having a forked end spaced adjacent the face of the substrate. The electrodes and contact elements are spaced apart longitudinally of the substrate and the contact arms alternate longitudinally between front and back faces thereof. Wire bridge connections are then readily made between successive arms on one or the other side of the substrate to turn on or off the individual T-element attenuator. Further, a connecting rod extends from each contact element normally to the edge of the substrate and parallel to the face of the substrate to engage a bore in a carrier plate upon assembly. Such rods connect to cross-pieces to facilitate assembly onto the substrate, one cross-piece for each set of contact elements having connecting arms on one side of the substrate.
Abstract:
A method of forming an electrical network package in which a B-stage thermosetting adhesive material is sandwiched between and adheres together a substrate bearing a network of electric circuit elements, and a protective superstrate. The component package is first heated sufficiently to initiate the formation of the adhesive into a gel. The package may then be cooled, and is momentarily compressed in order to flow the adhesive material into sealing relation with the electric network and to inhibit relative slippage between the substrate and superstrate followed by further heating to fully cure the adhesive.Except for the momentary compression, the entire curing sequence is performed without the application of external pressures, thereby considerably simplifying the requisite machinery. The method is adaptable to mass production techniques by employing a single continuous adhesive tape and lead frame in connection with a multiplicity of substrates.
Abstract:
A power semiconductor device includes: a circuit body having a pair of conductor parts and a power semiconductor element sandwiched between the pair of conductor parts; a substrate in which a through hole is formed; and a sealing material that seals at least a part of each of the circuit body and the substrate, in which the circuit body is inserted into the through hole and has first and second exposed surfaces exposed from the sealing material, and the substrate has, in the through hole, a first protrusion and a second protrusion that protrude toward a center of the through hole and are connected to the circuit body, the first protrusion and the second protrusion being formed at positions opposed to each other in the through hole, and at least one of the first protrusion and the second protrusion being a terminal that transmits power to the power semiconductor element.
Abstract:
In an exemplary embodiment, an electronic component with metal terminals includes a multilayer ceramic capacitor 10 having a pair of external electrodes 12, and a pair of metal terminals 20 each having, integrally, a plate-like supporting part 21 and a plate-like connecting part 22, and is constituted so that the supporting part 21 of each of the metal terminals 20 is joined to each of the external electrodes 12 in a manner allowing the connecting parts 22 to face each other, wherein two projecting parts 23 are provided on the connecting face of the connecting part 22 of each of the metal terminals 20.
Abstract:
An electronic device includes a chip component and an external terminal. The external terminal includes a terminal electrode connection part, a mounting connection part, and a support part. The terminal electrode connection part is arranged to face an end surface electrode part of a terminal electrode of the chip component. The mounting connection part is connectable to a mounting surface. The support part faces one side surface of an element body of the chip component closest to the mounting surface so as to support the one side surface spaced from the mounting surface. A bonding region and a non-bonding region are formed between the terminal electrode connection part of the external terminal and the end surface electrode part of the terminal electrode. The non-bonding region is formed from the terminal electrode connection part to the support part.