Abstract:
Es wird ein Einpresskontaktstift (2) zur Anordnung in einer ersten Durchkontaktierung einer Leiterplatte vorgeschlagen. Ein distaler Einpressabschnitt (4) weist zur Einpressung in die erste Durchkontaktierung eine erste Querausdehnung (D1) auf. Ein proximaler Einpressabschnitt (8) weist zur Einpressung in eine zweite Durchkontaktierung eine zweite Querausdehnung (D2) auf, welche größer ist als die erste Querausdehnung (D1).
Abstract:
The invention concerns a solder spacer comprising an elongate body (102) having one end provided with a tapped hole (104) and an opposite end provided with a transverse support surface (106) from which a smooth centring pin (103) extends protruding, the pin (103) comprising a longitudinal outer passage (108) extending over a least a portion of the length of same to the transverse support surface (106), allowing a molten soldering paste to rise by capillarity to the transverse support surface (106). The invention also concerns a module (112) comprising such a spacer.
Abstract:
A process of producing a semiconductor device including a semiconductor chip (10), electrode terminals (12) formed on an electrode terminal carrying surface of the semiconductor chip (10), conductor wires (14) bonded to, and standing on, the electrode terminals (12), and solder bumps (38) formed on respective tips of the conductor wires (14), comprises the steps of: forming spots of a solder paste (32) corresponding in arrangement to the tips of the wires (14), on a substrate (30) less wettable by the solder than the wires (14); positioning the spots of the solder paste (32) with the tips of the wires (14); and, heating the spots of the solder paste (32) to form solder bumps (38) on the tips of the wires (14).
Abstract:
A compliant lead (32) for electromechanically surface mounting an integrated circuit chip package to a substrate. The compliant lead (32) extends from the package and includes at least two regions of different lead thickness. In a first region (42), a standard lead thickness is employed to ensure the applicability of existing package fabrication techniques. A second region (44), having a reduced thickness, then extends from the first region (42) and is predefined to encompass an area of the lead expected to undergo greatest stress during thermal cycling. Compliancy is further guaranteed by providing a solder dam within the region of reduced thickness to limit wicking of solder when the package is solder mounted to the substrate. Lead frame fabrication is also discussed.
Abstract:
L'invention concerne un procédé de fabrication d'un module électronique (2) comportant une carte (3) à circuit imprimé (4), au moins un composant d'un premier type (5) et un composant d'un deuxième type (6), le procédé comprenant les étapes de : - disposer de la brasure sur la carte, - positionner le composant du premier type, - fondre la brasure pour souder le composant du premier type, - positionner le composant du deuxième type de telle manière que celui-ci s'étende au-dessus du composant du premier type et ait des pattes (7) en appui sur la carte par de la brasure, - fondre la brasure pour souder le composant du deuxième type.
Abstract:
A chip resistor (30) having first and second opposite ends includes a rigid insulated substrate having a top surface and an opposite bottom surface, a first electrically conductive termination pad (32) and a second electrically conductive termination pad (32), both termination pads (32) on the top surface of the rigid insulated substrate, a layer of resistive material between the first and second electrically conductive termination pads, and a first and a second flexible lead (4), each made of an electrically conductive metal with a solder enhancing coating. The first flexible lead (4) attached and electrically connected to the first electrically conductive termination pad and the second flexible lead (4) attached and electrically connected to the second electrically conductive termination pad. Each of the flexible leads (4) has a plurality of lead sections (12, 14, 16) facilitating bending around the end of the chip resistor (30).