Abstract:
A ground connector and standoff apparatus (10) or spring member for mounting between two circuit boards (12, 14) is of conductive material and has opposing substantially flat, parallel first and second legs (16, 18) and a spring link (20) connecting the legs. In an uncompressed condition of the spring member, the legs are spaced apart a predetermined distance greater than the spacing between the two circuit boards when connected together. The first leg is connected to one of the circuit boards and the second leg bears against an opposing portion of the other circuit board to provide a ground connection when the boards are connected together, compressing the spring member. A limiter or spacer (22, 23) on the spring member limits compression beyond a predetermined point at which the height of the spring member is equal to a predetermined standoff between the boards.
Abstract:
High density packaging of semiconductor devices on an interconnection substrate is achieved by stacking bare semiconductor devices (402, 404, 406, 408) atop one another so that an edge portion of a semiconductor device extends beyond the semiconductor device that it is stacked atop. Elongate interconnection elements (422, 424, 426, 428) extend from the bottommost one of the semiconductor devices, and from the exposed edge portions of the semiconductor devices stacked atop the bottommost semiconductor device. Free-ends of the elongate interconnection elements make electrical contact with terminals of an interconnection substrate (430), such as a PCB. The elongate interconnection elements extending from each of the semiconductor devices are sized so as to reach the terminals of the PCB, which may be plated through holes (432, 434, 436, 438). The elongate interconnection elements are suitably resilient contact structures, and may be composite interconnection elements comprising a relatively soft core (e.g., a gold wire) and a relatively hard overcoat (e.g., a nickel plating).
Abstract:
A light emitting device (1) and a photodetector (2) face each other with a space therebetween in such a way that the light emitting device (1) emits light and the photodetector (2) receives the light. They are fixed with a package made of an opaque material. The leads of the light emitting device and the photodetector are led out of the bottom surface (A) of the package (3), inserted into the through-holes of a substrate and soldered. Axial movement preventive bent parts (11g and 21g) which have at least 1st bending points at the positions on the leads apart from the bottom surface of the package by a distance smaller than the thickness of the substrate are formed. As a result, when the leads of the photointerruptor are inserted into, e.g., a printed board and soldered, no inclination nor misalignment occurs.
Abstract:
The efficacy of electrical discharges for severing bond wires (102, 202) and/or for forming balls (234, 236) at the ends of bond wires (including bond wires (202) already severed by alternative mechanisms) is improved by performing the electrical discharges in the presence of ultraviolet light (130). A "spark gap" is formed between an EFO electrode (118, 232) and the wire (102, 202), one of which serves as the cathode of the spark gap. Preferably, the ultraviolet light (130) is directed at the element serving as the cathode of the spark gap. Providing photoemission at the cathode element of the spark gap stabilizes arc/plasma formation and produces more reliable and predictable results. This technique may be used in conjunction with negative EFO systems or with positive EFO systems, and may benefit from either direct or field-assisted photoemission.
Abstract:
Resilient contact structures (430) are mounted directly to bond pads (410) on semiconductor dies (402a, 402b), prior to the dies (402a, 402b) being singulated (separated) from a semiconductor wafer. This enables the semiconductor dies (402a, 402b) to be exercised (e.g., tested and/or burned-in) by connecting to the semiconductor dies (702, 704) with a circuit board (710) or the like having a plurality of terminals (712) disposed on a surface thereof. Subsequently, the semiconductor dies (402a, 402b) may be singulated from the semiconductor wafer, whereupon the same resilient contact structures (430) can be used to effect interconnections between the semiconductor dies and other electronic components (such as wiring substrates, semiconductor packages, etc.). Using the all-metallic composite interconnection elements (430) of the present invention as the resilient contact structures, burn-in (792) can be performed at temperatures of at least 150 DEG C, and can be completed in less than 60 minutes.
Abstract:
The present embodiments relate to providing electrical connectivity to electric-powered components (24a,24b) mounted in parallel on a wiring board.(2) An electrical apparatus (1) is provided in which electricity is conducted from an electrically conductive member (31) onto first and second electrically conductive pathways (23a,23b), of a wiring board (2) through the use of first and second resiliently- deformable electrically conductive connectors(41a,41b). First and second electric- powered components (24a,24b) are mounted to the respective first and second electrically conductive pathways (23a,23b). The first and second resiliently- deformable electrically conductive connectors are compressed between the electrically conductive member and the wiring board such that the first connector provides an electrical connection between the conductive member and the first electrically conductive pathway, and the second connector provides an electrical connection between the conductive member and the second electrically conductive pathway.
Abstract:
Es wird ein elektrisches Bauelement (1) angeben, das mehrere Teilkörper (2), einen Sockel (3), auf dem die Teilkörper (2) angeordnet sind, und wenigstens einen Anschlusskontakt (4, 5) zum elektrischen Anschluss der Teilkörper (2) an einem Träger (13) aufweist. Weiterhin wird ein Verfahren zur Herstellung eines elektrischen Bauelements (1) aufweisend ein oder mehrere Teilkörper (2) angegeben.
Abstract:
A high frequency coax via structure is configured with a stripped semi-rigid cable (no shield), and an inductive compensation loop to mitigate transition discontinuity between that via structure's center conductor and the pad to which the center conductor is connected. The performance of top-to-bottom microwave transitions at high frequencies (e.g., 1 to 12 GHz) for such boards is enhanced. A non-metallized via hole embodiment that is configured with surrounding ground vias provides a greater degree of compensation for connection pads associated with greater capacitance (such as those coupled to a component).