Abstract:
An electrical power distribution unit for an electrical system has a printed circuit board with a punched grid arranged thereon. An electrical component is arranged on the printed circuit board on a side of the punched grid. An electrical contact of the electrical component projects through a passage opening in the printed circuit board. The punched grid is arranged between the electrical component and the printed circuit board, and an opening is formed in the punched grid in an area around the electrical contact. The punched grid has a current infeed which comprises a plurality of tongues. At least one of the tongues is bendable out of a plane of the punched grid in such a way that two of the tongues form a mutually adjacent common portion, which is electrically contactable by an electrical plug connector.
Abstract:
The present invention relates to printed circuit board (PCB) assemblies and particularly, but not exclusively, to a system for shielding components from radio frequency interference (RFI) and more particularly to a system for shielding surface mounted devices (SMD). The invention provides a printed circuit board assembly (2) comprising a printed circuit board (4) and a component (6) mounted thereon, wherein the printed circuit board (4) and component (6) are secured to one another by securing means comprising at least one barb (22). The securing means can also comprise one or more tabs (60,70) which strengthen the securing of the component to the PCB.
Abstract:
A circuit board or each circuit board of a multi-layer circuit board includes an electrically conductive sheet coated with an insulating top layer covering one surface of the conductive sheet, an insulating bottom layer covering another surface of the conductive sheet and an insulating edge layer covering an edge of the conductive sheet. An insulating interlayer can be sandwiched between a pair of adjacent circuit boards of a multi-layer circuit board assembly. A landless through-hole or via can extend through one or more of the circuit boards for connecting electrical conductors on opposing surfaces thereof.
Abstract:
The invention relates to circuit boards and to screening circuits and components on such boards from stray rf interference when they are mounted as arrays or stacks of such circuit boards. The- circuit boards (12, 14) are individually screened by conductive screening layers (16, 18) as known in the art and the individual screening layers are coupled together by layered interconnects (34) which connect corresponding screening layers (16, 18) of the individual circuit boards (12, 14) together, instead of by vias.
Abstract:
A liquid discharge recording head includes a recording element with a discharge port for discharging liquid and an electrically connecting portion arranged adjacent to the discharge port and receiving an electric signal for controlling the discharge of the discharge port. The liquid discharge recording head further includes a flexible wiring substrate for covering at least a portion of the recording element. The flexible wiring substrate includes each of a device hole for exposing the discharge port and a bonding hole arranged facing the electrically connecting portion independently. The liquid discharge recording head further includes a sealing agent for covering at least a portion of the electrically connecting portion and filled to at least a portion of the bonding hole. Thus, a liquid discharge recording head that enhances recording performance and that has superior productivity while maintaining reliability of the recording performance is provided.
Abstract:
A lightwire segment in the form of an elongated substrate frame composed of a flat flexible thin elongated sheet of plastic dielectric material having a copper film laminated on at least one side; a plurality of cavities longitudinally spaced along the elongated substrate, a LED diode having first and second contacts embedded in each of the cavities of the substrate; the copper film on one side of the substrate defining two interconnects separated by a dielectric space, one interconnect having a tab bonded to the first contact of each LED diode, and the other interconnect having a tab bonded to the second contact of each LED diode. A lightwire made from a plurality of segments that are bonded together in series or parallel. A micropackage made from a substrate frame composed of a flat flexible thin sheet of plastic dielectric material having a copper film laminated on one side defining rows and columns of component sites separated from one another by thin webs to be readily detached from the substrate frame. The micropackage has indexing elements to position the substrate frame relative to a machine that can pick the component sites out of the frame. Each component site defines a cavity formed in the substrate, and the copper film laminated on the substrate defines two separated interconnects, each having a tab extending into the cavity formed in the substrate. An electrical component having contacts is positioned in the cavity and its contacts are bonded to the tabs.
Abstract:
An etched dielectric film for use in a hard disk drive. The dielectric film has a thickness of about 25µm or greater when it is attached to a supporting metal substrate, and is subsequently etched to a thickness of about 20µm or less.
Abstract:
Um bedrahtete Bauteile großer Masse oder mit ungleicher Masseverteilung sicher auf einer Leiterplatte (60) zu befestigen, ohne daß die Bauteile, wie heute üblich , auf die Leiterplatte geklebt oder mit Snap-In-Halterungen auf der Leiterplatte gehalten werden, schlägt die Erfindung vor, in eine Anschlußbohrung (11) zur Aufnahme eines Anschlußdrahtes oder -pins (111) eines elektronischen Bauteils (110) eine Haltevorrichtung (65) zum Festhalten des Anschlußdrahtes oder -pins (111) zu integrieren. Die Haltevorrichtung (65) stellt eine Verengung in der Anschlußbohrung (11) auf einen Durchmesser dar, der kleiner ist als der des Anschlußdrahtes oder -pins (111). Beispielsweise kann die Haltevorrichtung (65) durch eine Anschlußbohrung (11) realisiert werden, die als einseitige aber nicht vollständig durch die Leiterplatte (60) hindurch gebohrte Bohrung (16) ausgeführt ist. In diesem Fall bleibt ein Rand als Verengung (65) stehen, der den Anschlußpins (111) des betrachteten Bauteils (110) festklemmt und das Bauteil auf der Leiterplatte festhält.
Abstract:
A first microelectronic element (44) such as a semiconductor chip is mounted to a circuit board (70) using an adaptor which has a region (26) extending beneath the first microelectronic element (44) and an additional region (28) which may be folded over the first microelectronic element (44) or which may project laterally from the first microelectronic element (44). The adaptor includes a functional element in the additional region (28), such as a further microelectronic element or an array of terminals (40) for mounting another element. The assembly provides the benefits of a stacked chip assembly or other mustachio module, but can be made without the need for a special prepackaged stacked chip assembly. The adaptor can be configured so that it does not materially increase the height of the first microelectronic element (44) above the circuit board (70).