Abstract:
A printed circuit board or the like, is provided with a hole (31) for the purpose of interconnecting conductive layers on opposite sides of the board. When removing material to form the hole (31), part of one conductive layer is preserved to form a tab (30). This tab (30) is pushed through the hole to form the desired electrical connection between opposite sides.
Abstract:
The invention aims at obtaining a very cheap electronic circuit used for example in a card or label while maintaining high reliability. In particular, the invention concerns connecting one or more electronic components on the strip conductors by means of conductor bridges which cross the substrate. The inventive electronic circuit comprises at least an electronic component (6), a substrate (5), on one first face of said substrate is applied an adhesive layer and a conductive layer consisting of a plurality of tracks (4). The electronic component (6) comprises at least two bond pads (7). One of said pads (7) is electrically connected to the conductive layer by a conductor bridge formed by a conductive segment (1) delimited solely in the conductive layer. Said segment (1), free of adhesive substance, crosses the substrate (5) through a passageway (2, 3) and connects the bond pad (7).
Abstract:
A process for providing a metal-seeded liquid crystal polymer comprising the steps of providing a liquid crystal polymer substrate to be treated by applying an aqueous solution comprising an alkali metal hydroxide and a solubilizer at a temperature from 50°C to 120°C to etch the liquid crystal polymer substrate. An adherent metal layer may be deposited on the etched liquid crystal polymer substrate using either electroless metal plating or vacuum deposition of metal. When using electroless metal plating, a tin(II) solution applied to the liquid crystal polymer, followed by application of a palladium(II) solution, provides the metal-seeded liquid crystal polymer. Etchant solutions may be used to form flexible circuits comprising a liquid crystal polymer film, having through-holes and related shaped voids, and for surface preparation of liquid crystal polymer substrates applied to flexures for hard disk drives.
Abstract:
Procédé de fixation d'une diode électroluminescente de puissance (1) ayant une embase (2) métallique, sur un élément radiateur de chaleur (3) métallique, selon lequel l'embase (2) de la diode électroluminescente est fixée sur l'élément radiateur (3) par soudure laser par points (11).
Abstract:
A power circuit section (1) including a plurality of bus bars (10) is disposed through an insulation layer (5) on a circuit arrangement surface of a heat radiation member (2). An end of each of the bus bars is folded up from the circuit arrangement surface to form an external connection terminal (14). An enclosure wall member (30) that surrounds the power circuit section including the external connection terminal is disposed on the heat radiation member. A connector housing (36) contains an external connection connector that comprises a bottom portion provided with terminal, a through-hole (37) into which the external connection terminal is inserted, and a hood (38) that surrounds the external connection terminal. The external connection connector can be coupled to another connector together with the external connection terminal. A waterproof layer (6) is formed within the enclosure wall member so that at least a part of the power circuit section is sealed and the terminal through-hole is sealed.
Abstract:
The invention aims at obtaining a very cheap electronic circuit used for example in a card or label while maintaining high reliability. In particular, the invention concerns connecting one or more electronic components on the strip conductors by means of conductor bridges which cross the substrate. The inventive electronic circuit comprises at least an electronic component (6), a substrate (5), on one first face of said substrate is applied an adhesive layer and a conductive layer consisting of a plurality of tracks (4). The electronic component (6) comprises at least two bond pads (7). One of said pads (7) is electrically connected to the conductive layer by a conductor bridge formed by a conductive segment (1) delimited solely in the conductive layer. Said segment (1), free of adhesive substance, crosses the substrate (5) through a passageway (2, 3) and connects the bond pad (7).
Abstract:
Die Erfindung betrifft einen Schaltungsträger (3) für eine elektrische Schaltung, insbesondere in der Art einer wenigstens teilweise flexiblen Leiterplatte. Der Schaltungsträger (3) weist elektrische, elektronische o. dgl. Bauteile (2), wie einen Elektromotor (2a), Schalter (2b), Widerstand, Kondensator, Spule, IC, Steckanschluß o. dgl. auf. Weiter besitzt der Schaltungsträger (3) Leiterbahnen zur elektrischen Verbindung der Bauteile (2) sowie Kontaktflächen (5) zur elektrischen Kontaktierung der Bauteile (2). Die Kontaktfläche (5) ist wenigstens teilweise in der Ebene des Schaltungsträgers (3) freigeschnitten, derart daß die Kontaktfläche (5) eine Flexibilität in eine außerhalb der Ebene (6) des Schaltungsträgers (3) verlaufende Richtung aufweist, insbesondere in der Art einer Kontaktzunge. Ein Kontaktelement (8) zur elektrischen Kontaktierung des Bauteils (2) liegt mit einem Anpreßdruck derart an der Kontaktfläche (5) an, daß die Kontaktfläche (5) aus der Ebene (6) des Schaltungsträgers (3) ausgelenkt ist.
Abstract:
The invention relates to a module support (1), for electrical/electronic components (7), comprising a conductor arrangement with several metallic conductors (2), formed from a stamped grid and an insulating material shell (3) in which the metallic conductors (2) are at least partly embedded. At least one contact section (10) of a metallic conductor (2), for contacting a connector element (8) on an electrical/electronic component (7), is arranged in a through recess (6) in the insulating material shell (3). According to the invention, damage to the insulating material shell (3), on soldering the contact section (10), may be avoided, whereby the at least one contact section (10) of the metallic conductor (2) is completely removed from the shell of insulating material and is only electrically connected to a section (12) of the conductor (2), arranged on the inner wall of the recess (6), by means of at least one connector bridge (11), arranged in said recess (6). The heat-conducting cross-sectional area of the at least one connector bridge (11) is small, in such a way that, on a strong heating of the contact section (10), the connector bridge (11) causes a reduction in the flow of heat to the section (12) of the conductor (2) arranged on the inner wall of the recess (6), which has a larger heat-conducting cross-sectional area.
Abstract:
A probe card assembly comprising: a probe card comprising a plurality of electrical contacts; a probe substrate having a plurality of elongate, resilient probe elements; a second substrate disposed between and spaced from said probe card and said probe; and a plurality of elongate interconnection elements providing compliant electrical connections through said second substrate between said probe card and said probe substrate and thereby electrically connecting ones of said electrical contacts with ones of said probe elements.