Abstract:
Eine Leiterplatte 10 zur Bestückung mit oberflächenmontierbaren (SMD) und mit drahtgebundenen Bauteilen 80, 70 ist mit einer ersten Substratschicht, die auf ihrer Bestückungsseite O eine Leiterbahnen 21 aufweisende Leitschicht 22 trägt und mit Durchgangsbohrungen 24 versehen ist, mit einer zweiten Substratschicht 30, die eine Bestückungsseite U aufweist und die mit Durchgangsbohrungen 34 versehen ist, wobei die Durchgangsbohrungen 24, 34 eine Metallisierung 50 aufweisen, und mit einer Zwischenschicht 40, die zwischen den Substratschichten 20, 30 angeordnet ist, ausgebildet, wobei die Durchgangsbohrungen 24, 34 in den Bestückungsseiten O, U der Substratschichten ausgebildet sind und kongruent übereinander liegen, wobei die metallisierten Durchgangsbohrungen 24, 34 elektrisch leitend mit den Leiterbahnen 21 der Leitschicht 22 der ersten Substratschicht verbunden sind, und wobei die Zwischenschicht 40 zumindest abschnittsweise in die Durchgangsbohrungen 24, 34 hineinragt. Die Zwischenschicht 40 ist im Bereich der Durchgangsbohrungen 24, 34 der Substratschichten 20, 30 mit Durchbrüchen 44 versehen, wobei die Lichte Weite d der Durchgangsbohrungen 44 in der Zwischenschicht 40 kleiner ist als der Durchmesser D der Durchgangsbohrungen 24, 34 in den Substratschichten 20, 30. Günstigerweise sind dabei die drahtgebundenen Bauteile 70 in der Zwischenschicht 40 kraft- oder reibschlüssig gehalten.
Abstract:
The invention relates to a circuit board unit and a method for production thereof. The circuit board unit comprises a circuit board topmost laminate (8; 19) with conductive tracks (10) on the upper side for mounting surface-mountable devices SMDs (12; 14; 18; 21). The circuit board topmost laminate (8; 19) features a thickness dimensioned such that the anticipated heat dissipated by the SMDs (12; 18) is transported from the upper side to the underside of the circuit board laminate (8; 19) to good effect. The circuit board unit further comprises an electrically insulating laminate (9) arranged under the circuit board topmost laminate (8; 19), inserts (15) made of a material with good heat conductivity and electrical insulation embedded in the electrically insulating laminate (9) at sites below SMDs (12; 18) with high heat dissipation, and a cooling plate (16) arranged below the electrically insulating laminate (9) and the inserts (15).
Abstract:
The invention relates to a power electronics component that comprises a planar ceramics substrate (2) on whose one face conductor tracks (6), applied in thick-film technique, are disposed for electrically connecting electrical power components (7) of a circuit that are also disposed on the ceramics substrate (2). The ceramics substrate (2), with its other face, is brazed onto a metal support element (1) that serves as a heat spreader. The support element (1) is linked with a thermoconducting housing part (9) of a housing that accommodates the support element (1) in a thermoconductive manner. On the face of the support element (1) facing away from the ceramics substrate (2), approximately opposite the ceramics substrate (2), a second ceramics substrate (4) is brazed onto the ceramics substrate (2) that carries the circuit and has approximately the same dimensions.
Abstract:
The present invention provides an electronic assembly 400 and a method for its manufacture 800, 900, 1000 1200, 1400, 1500, 1600, 1700. The assembly 400 uses no solder. Components 406, or component packages 402, 802, 804, 806 with I/O leads 412 are placed 800 onto a planar substrate 808. The assembly is encapsulated 900 with electrically insulating material 908 with vias 420, 1002 formed or drilled 1000 through the substrate 808 to the components' leads 412. Then the assembly is plated 1200 and the encapsulation and drilling process 1500 repeated to build up desired layers 422, 1502, 1702. Assemblies may be mated 1800. Within the mated assemblies, items may be inserted including pins 2202a, 2202b, and 2202c, mezzanine interconnection devices 2204, heat spreaders 2402, and combination heat spreaders and heat sinks 2602. Edge card connectors 2802 may be attached to the mated assemblies.
Abstract:
Disclosed are a multi-layer flexible printed circuit board and a method for manufacturing the same. The multi-layer flexible printed circuit board includes an adhesion sheet from which a pressing and heating area is cut, an upper base layer, from which the pressing and heating area is cut, on the adhesion sheet, and a lower base layer under to the adhesion sheet.
Abstract:
La présente invention se rapporte au domaine des circuits imprimés. La présente invention se rapporte à un procédé pour la liaison d'un circuit rigide avec un circuit imprimé souple, caractérisé en ce qu'il comporte, dans l'ordre, une étape de collage de l'extrémité du circuit imprimé souple sur l'extrémité du circuit rigide, de manière à assurer la superposition dos-à-dos de pastilles de contact électrique des deux circuits, une étape de perçage de cet assemblage au niveau desdites pastilles de contact électrique, et une étape de liaison électrique desdits perçages réalisée par dépôt par sérigraphie d'une pâte conductrice.
Abstract:
A semiconductor package includes: a first substrate; a second substrate disposed on the first substrate to be spaced apart from the first substrate, and including an active region on which semiconductor devices are configured to be mounted; and a flexible interconnection member electrically connecting the first substrate to the second substrate, the flexible interconnection member including a flexible film and a metal wiring member formed on the flexible film.
Abstract:
A method for making a leadframe includes removing a group of parallel, strip-shaped electrical conductors from a metal sheet, embedding end portions of the conductors in molding compound defining a leadframe body, and separating the conductors from each other, such that portions of the conductors remain encapsulated in the molding compound while other portions remain exterior to the molding compound and define leads of the resulting leadframe.