Abstract:
L'invention concerne un procédé de connexion électrique entre un premier composant (10) comportant, sur une face, un ensemble de premiers plots (8) et un ensemble de pointes conductrices dures (13) et un second composant (11) comportant, sur une face, un ensemble de second plots (9) et un ensemble de protubérances conductrices ductiles (14) , dans lequel on met en vis-à-vis les deux faces et on les rapproche de telle façon que les pointes (13) puissent pénétrer dans ces protubérances (14) , dans lequel l'espace entre deux pointes (13) est inférieur à la largeur d'une protubérance (14) et à la largeur d'un premier plot (8) . L'invention concerne également un tel composant muni d'un ensemble de pointes conductrices dures.
Abstract:
A surface-mounted device comprising a semiconductor chip (5) encapsulated in a package (1) and leads (2) projecting from the package so as to bring the semiconductor chip into contact with a substrate (3), which leads are provided at their surface, at the location of one of the pads provided for surface mounting, with a three-dimensional contact pattern.
Abstract:
An impedance-matching electrical connection system, for use with high-frequency communication signals, includes a circuit board and a plurality of contact pads mounted on the circuit board. The contact pads are for coupling with a plurality of complementary connectors of an external electrical device. Each coupling is associated with an excess shunt capacitance. The electrical connection system further includes a plurality of inductive traces mounted on the circuit board, each of which is connected to a respective contact pad, and is associated with a compensating series inductance. Additionally, the electrical connection system includes a plurality of signal lines mounted on the circuit board, each of which is connected to a respective inductive trace. Each inductive trace is configured so that its associated compensating series inductance substantially offsets the excess shunt capacitance associated with the coupling between the contact pad connected to the inductive trace and a complementary connector.
Abstract:
A thin flexible electric conductor for use in implantable devices such as cochlear implants, consists of a conductive metal layer coated on a flexible three dimensionally textured surface so that the current capacity of the conductor is increased relative to the current capacity of a conductor of the same size that is not on a three dimensional surface. The flexible substrate is treated to form a three dimensional surface such as with corrugations and a conductive layer is deposited onto the surface.
Abstract:
A bonded structure comprising a board provided with a through hole, a land disposed on the periphery of the through hole, and a lead led out from an electronic part and placed in the through hole. The land comprises an wall face land part on the wall face of the through hole, and front and rear surface land parts on the front and rear surfaces of the board. A fillet for connecting the land with the lead comprises upper and lower fillets parts touching the front and rear surface land parts, respectively, wherein the contour of the upper fillet is smaller than the contour of the lower fillet but larger than the size of the through hole. When a lead-free solder material is employed, occurrence of liftoff can be reduced effectively as compared with a conventional one.
Abstract:
The control device (1) is equipped with an electrical component (2) in which heat is generated. Said heat is dissipated over an elongated metal part (10) whose one face (12) is soldered to the component (2). The face (12) oriented toward the component (2) has a shape that increases the size of its surface. The shape is outwardly arched and can be provided with a ribbing.
Abstract:
The invention relates to a method for fixing an especially modularly mounted, miniaturised component (2) onto a base plate (1) by means of a soldered joint. One side (4) of the component (2) is coated with a layer (5) of soldering material and the base plate (1) is coated at least partially with a layer of metal (6, 6', 6''). The component (2) is positioned above the base plate (1) with the metal layer and the layer of soldering material (5) facing each other without touching, at a vertical distance from each other. Heat energy is then supplied from the side of the base plate (1) in order to melt the soldering material of the soldering material layer (5) on the side (4) of the component (2) until a drop is formed. The component (2) and the base plate (1) are mutually fixed to each other when the drop of soldering material (5') fills the gap between them.
Abstract:
A process for roughening a metal surface is provided comprising applying a coating to the metal surface wherein the coating is a temporary barrier to an etchant attacking the metal surface and the coating is susceptible to the etchant gradually removing the coating, and then etching the coated metal surface with an aqueous bath containing the etchant effective to produce a roughened metal surface.