Abstract:
According to one embodiment of the invention, a method for sealing one or more vias comprises providing a first substrate having vias, forming an adhesion layer on an inner surface of the vias, sandwiching a solder layer between the first substrate and a second substrate, and elevating of the first substrate, second substrate, and solder layer to a temperature above a eutectic point and below a melting point of the solder layer. The act of elevating the solder layer to a temperature above the eutectic point and below the melting point causes the solder layer to flow into the vias in a generally consistent manner.
Abstract:
In one embodiment, a tester interface module (10) for connecting a plurality of signal paths from at least one electronic assembly to at least one other electronic assembly is provided. The interface module includes a capture board (150) having center conductor vias (172) with center conductor holes (170) extending through the capture board. Axial cables (110) secured to the capture board have center conductors (160) extending at least part way through a corresponding center conductor hole of the center conductor via. An interface component (200) is adjacent to the capture board, the conductor paths being conductively bonded to the conductor vias of the capture board so as to electrically connect center conductors to corresponding conductor paths. The conductor paths of the interface component are arranged to allow connection with an electronic assembly.
Abstract:
A method of fabricating a multilayer printed circuit board, comprises alternately stacking on a template (1) having at least two vertical alignment pins (2), predefined printed circuit sub-boards (3) and pre-impregnated sheets (12) precursors of dielectric layers of reinforced resin between said sub-boards, all provided with alignment holes (14, 5), binding together the components of the assembled stack, lifting the stack off the alignment pins (2), transferring it between the platens of a press and hot pressing it causing polymerization of the resin of said pre-impregnated sheets. The method consists in defining at least a pair of soldering pads (7) with hole therethrough at certain positions relative to said alignment holes (14, 5) on both faces of each of said sub-boards (3) except the lowermost sub-board on which blind pads (6) are defined on at least its upper face; indenting or perforating each pre-impregnated sheet (12) such not to overlap said pads (6, 7) and soldering each newly stacked sub-board (3) to the previously stacked underlying sub-board (3) through the respective pads (7) with a hole therethrough. The machine employs a template (1) having at least two vertical alignment pins (2); a least two electric soldering irons (16), soldering each sub-board (3) just stacked to the previously stacked underlying one through welding pads (7) having a hole therethrough and has means (18) for moving each one of said soldering irons along three orthogonal axis onto a respective one of said pads (7) with a hole therethrough to make the soldering, and off and away from the stack when the soldering have been done.
Abstract:
The invention concerns a method for making smart cards, said smart card comprising a card body (10) enclosing an antenna (20) at the ends of which are provided connection terminals (120) to be connected to an electronic module (20) housed in a cavity of said card body, the electronic module comprising on one surface at least an integrated circuit chip and on the other surface connection pads, the chip being connected to said pads. The method comprises steps which consist in: producing micro-perforations (213) passing through at least two contact pads (200) and if necessary the support of said pads; connecting the antenna (120) to said pads (200) by spraying electrically conductive material into the micro-perforations.
Abstract:
A three-dimensional multi-layer moulded electronic device and method for manufacturing same, wherein the device comprises at least two moulded, three-dimensional substrates (12, 14) having mating surfaces (20, 22), each substrate including a layer (16, 18) of patterned conductive material on at least one surface and electrically conductive vias (24, 26) at selected locations of the substrate for interconnection of the conductive layers (16, 18), wherein the substrates (20, 22) are electrically joined at their mating surfaces and the circuit layers (16, 18) are aligned and interconnected to form a multi-layer, three-dimensional circuit which may include moulded-in structural features.
Abstract:
The invention concerns a smart card, a connection arrangement and a method of producing a smart card, a semiconductor chip located on a module being inserted into a recess (24) in a card carrier so as to be connected electrically and mechanically. According to a first feature of the invention, during the milling-out of the recess, a contact bump section is exposed (22, 23) such that a reliable connection is provided between the module and induction or antenna coil (11). According to a second and third feature, the required electrical contacts are produced by soldering and the required mechanical contacts are produced by heat-sealing or fusion adhesives. Furthermore, the adhesive is provided with conductive particles and is compressed when the connection is made, such that the necessary electrical contact is brought about. According to a fourth feature, a special reinforcement frame comprising insulating sections is provided. The reinforcement frame is used to increase mechanical stability and absorb torsion forces and stresses which can occur when the card is used. At the same time, the reinforcement frame permits easy contact with strip conductors inside the card, e.g. for inductive elements which form an antenna for contactless data-transmission.
Abstract:
A ball grid array integrated circuit package (10) which has a plurality of vias (30) located within the solder pads (20) of a package substrate. The substrate supports an integrated circuit (24) which is connected to the solder pads (20) by the vias (30). Solder balls (36) used to solder the package (10) to an external printed circuit board (12) are attached to the solder pads (20) of the substrate. A solder mask plug (38) is formed within the vias (30) to prevent the solder balls (36) from wicking into the vias (30). Locating the vias (30) within the solder pads (20) optimizes the routing space of the substrate and increases the routing density of the package (10).
Abstract:
According to a process for producing a thermal layout, not only massive heat sinks are provided for absorbing heat, but also an optimized number of thermoconductive strips which distribute the heat over the printed circuit board. In the collecting zones are arranged higher capacity sinks into which the heat is transmitted. The thermoconductive strips may be thermoconductors (TL) provided for that purpose and more massive than the conductive strips for the electric connections, or conductive strips for electric connections, the electroconductors (EL), may also be used for heat transfer. An optimum design interconnects the TL'S and EL's into a functional whole, a thermal management network. With a certain technique, which could be called pocket groove technique, "cooling channels" of a type may be created. Such thermoconductors may be included in the electric layout, so that a thermal layout is superimposed on the connection layout (TL/EL network). Heat distribution and transfer may thus be calculated and optimized by a computer in the same way as the electric distribution by the conductive strips, i.e. the known electric layout, which is produced by a computer-assisted process.
Abstract:
The disclosure involves the efficient termination of a winding PCB of a planar inductive component to a main PCB, using relatively little space and providing a low-resistance connection. The disclosed methods are especially suitable for planar structures where several winding PCBs, and/or winding PCBs and a main PCB, are all enclosed by the magnetic path components. The methods allow for a winding PCB to simply rest on the main PCB, or other winding PCBs, without any clearance. The disclosure employs mating sets of conductive annular rings with an optional interlocking terminal pin that allows two PCBs to be fixedly coupled together, while preserving a minimum distance between the solder-mask layers of the two PCBs in order to prevent the formation of unwanted electrical connections between the two PCBs. Solder is used to ensure effective coupling in each assembly of mating annular rings and optional terminal pin.
Abstract:
The disclosure involves the efficient termination of a winding PCB of a planar inductive component to a main PCB, using relatively little space and providing a low-resistance connection. The disclosed methods are especially suitable for planar structures where several winding PCBs, and/or winding PCBs and a main PCB, are all enclosed by the magnetic path components. The methods allow for a winding PCB to simply rest on the main PCB, or other winding PCBs, without any clearance. The disclosure employs mating sets of conductive annular rings with an optional interlocking terminal pin that allows two PCBs to be fixedly coupled together, while preserving a minimum distance between the solder-mask layers of the two PCBs in order to prevent the formation of unwanted electrical connections between the two PCBs. Solder is used to ensure effective coupling in each assembly of mating annular rings and optional terminal pin.