Abstract:
Es wird ein Halbzeug (2) sowie eine damit gebildete Träger¬ komponente (1) für darauf platzierte elektrische Schaltungs¬ bilder vorgeschlagen, die kostengünstig und zeitsparend eine Prototypen- oder Kleinserien-Fertigung ermöglichen. Erreicht wird dies dadurch, dass das Halbzeug (2) ein flächig ausge¬ bildetes, zum Beispiel flexibles, Basisträgermaterial umfasst, über dessen gesamten Flächenbereich in einem gleichmä¬ ßigen konstanten Raster mit Nano-Vias gebildete Durchkontaktierungen (7) angeordnet sind. Eine solche Komponente ist mit einer einzigen Schablone für die Belichtung zur Bildung der Nano-Vias realisierbar. Mit einer solchen Komponente sind aber auch Schaltungsbilder beliebigen Aussehens auf deren Oberflächen herstellbar.
Abstract:
A circuit board (200, 300, 400) design is disclosed that is useful in high speed differential signal applications uses either a via arrangement or a circuit trace exit structure. In the via arrangement, sets of differential signal pair vias (301, 303, 401, 402) and an associated ground (302) are arranged adjacent to each other in a repeating pattern. The differential signal vias (301, 303, 591) of each pair are spaced closer to their associated ground via (302a, 593a) than the spacing between the adjacent differential signal pair associated ground (302b, 593b) so that differential signal vias exhibit a preference for electrically coupling to their associated ground vias. The circuit trace exit structure involves the exit portions of the circuit traces (420, 550) of the differential signal vias (401, 402, 591) to follow a path where the traces then meet with and join to the transmission line portions (552) of the conductive traces.
Abstract:
A circuit board design is disclosed that is useful in high speed differential signal applications uses either a via arrangement or a circuit trace exit structure. In the via arrangement, sets of differential signal pair vias and an associated ground are arranged adjacent to each other in a repeating pattern. The differential signal vias of each pair are spaced closer to their associated ground via than the spacing between the adjacent differential signal pair associated ground so that differential signal vias exhibit a preference for electrically coupling to their associated ground vias. The circuit trace exit structure involves the exit portions of the circuit traces of the differential signal vias to follow a path where the traces then meet with and join to the transmission line portions of the conductive traces.
Abstract:
The present invention comprises a processed thin film substrate (10) and a method therefore, in order to produce a flexible printed circuit card, having a plurality of microvias going or passing through the thin film substrate and electrically connected along faced-away surfaces, in order to form an electric circuit. A first a number of real nano-tracks are filled with a first material (M1), having good electric properties, for the formation of a first number of, here denominated, first vias (V10, V30, V50), that a second number of real nano-tracks are filled with a second material (M2), having good electric properties, for the formation of a second number of, here denominated, second vias (V20, V40, V60). The first material (M1) and the second material (M2) of said first and second vias (V10-V60) are chosen having mutually different thermoelectric properties. A material surface-applied to the thin film substrate, coated on both sides (10a, 10b) of the thin film substrate (10), is distributed and/or adapted in order to allow the electrical interconnection of first vias, allocated the first material (M1), with second vias, allocated the second material (M2), and that a first via (V10) included in a series connection and a last via (V60) included in the series connection are serially co-ordinated in order to form an electric thermocouple (100) or other circuit arrangement.
Abstract:
Processes for fabricating a multi-layer circuit assembly and a multi-layer circuit assembly fabricated by such processes are provided. The process includes (a) providing a substrate at least one area of which comprises a plurality of vias, these area(s) having a via density of 500 to 10,000 holes/square inch (75 to 1550 holes/square centimeter); (b) applying a dielectric coating onto all exposed surfaces of the substrate to form a conformal coating thereon; and (c) applying a layer of metal to all surfaces of the substrate. Additional processing steps such as circuitization may be included.
Abstract:
The initial intention in the semi-finished product of the invention is to provide a functional separation between the requirement for mechanical strength and the previously concomitant requirement, for completing a circuit, in order to bring the pure circuit connection, especially for signals, "closer" to the electrical and technical properties of chips. To do this, the layout miniaturisation is optimised without regard for the mechanical strength of the substrate. Instead of a printed circuit board (MCM), a semi-finished product which can be developed into a printed circuit board is made. The semi-finished product of the invention consists of an extremely thin film (8) with a plurality of extremely small holes (14) made simultaneously by an etching process. The hole diameters can be reduced by almost an order of magnitude (down to 20 mu m), facilitating, for instance, definite sub-100 mu m technology. Such a semi-finished product (19) does not act as a mechanical support but is designed only for signal conduction. The semi-finished product (19) which carries the densely packed wiring pattern, is bonded to a not densely packed power supply plane (22) acting as the service plane and the printed circuit board thus made is finally secured to a mechanical support (20).
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring board which eliminates an electrical short circuit between solder bumps caused by warpage and which can cause a mounting semiconductor element to normally operate.SOLUTION: A wiring board comprises: a core substrate 1 having a number of through holes 5; build-up insulation layers 2 and build-up wiring layers 3 which are alternately laminated one on top of the other on each of the top face and an undersurface of the core substrate 1; semiconductor element connection pad formation regions on a top face central part, in which a number of semiconductor element connection pads 7 are arranged in a reticular pattern; first through holes arranged in a first region X in the core substrate 1 opposite to the semiconductor element connection pad formation region A with a first arrangement density; second through holes arranged in each second region Y on an outer periphery of the core substrate 1 and at a distance from the first region X with a second arrangement density lower than the first arrangement density; and third through holes arranged in each third region Z between the first region X and the second region Y with a third arrangement density higher than the second arrangement density.