Abstract:
An electronic device comprising a semiconductor chip which is fixed to the mounting face of a wiring board through an adhesive and in which external terminals are electrically connected with electrode pads of the wiring board through bump electrodes. Recesses are formed in the electrode pads, and in the recesses the electrode pads and the bump electrodes are connected. The electrode pads are formed over the surface of a soft layer, and the recesses are formed by elastic deformation of the electrode pads and the soft layer.
Abstract:
The present invention comprises a printed circuit having a three-dimensional surface capable of conforming to a contoured surface of a vehicle trim panel. Printed circuit comprises a plurality of electrical conductors and connectors secured to a polymeric substrate. A convoluted region of the printed circuit permits formation of the three-dimensional surface in the printed circuit. The present invention further comprises a method a producing three-dimensional surface and the printed circuit by either thermoforming the printed circuit or mechanically stretching the printed circuit to produce the three-dimensional surface.
Abstract:
A flexible printed circuit board assembly comprising a first flexible printed circuit board and a second flexible printed circuit board, wherein each of the first and second flexible printed circuit boards is provided with a position fixing coupling to determine the position of the second flexible printed circuit board relative to the first flexible printed circuit board.
Abstract:
Method of surface mounting an electronic component to a bonding pad on one side of a supporting insulating board carrying a planar printed circuit thereon, the pad being connected to one or more conductors on the board by use of solder material subject to one or more gas trapping through-hole vias, comprising: (a) creating at least one vent channel below the top plane of the printed circuit and extending from a location at or closely adjacent to one of said vias to a location essentially near a periphery of solder material to be placed thereover; (b) planting a deposit of solder material between the component and pad; (c) bringing the component, solder material and pad together to form an assembly; and (d) heating the assembly to momentarily reflow the solder material in place without shifting, skewing, or tilting of the component, any trapped air in said one vias being allowed to expand and migrate away through the channel to at least the periphery of the pad.
Abstract:
A microelectronic connection component includes a dielectric sheet having an area array of elongated, strip-like leads. Each lead has a terminal end fastened to the sheet and a tip end detachable from the sheet. Each lead extends horizontally parallel to the sheet, from its terminal end to its tip end. The tip ends are attached to a second element, such as another dielectric sheet or a semiconductor wafer. The first and second elements are then moved relative to one another to advance the tip end of each lead vertically away from the dielectric sheet and deform the leads into a bent, vertically extensive configuration. The preferred structures provide semiconductor chip assemblies with a planar area array of contacts on the chip, an array of terminals on the sheet positioned so that each terminal is substantially over the corresponding contact, and an array of metal S-shaped ribbons connected between the terminals and contacts. A compliant dielectric material may be provided between the sheet and chip, substantially surrounding the S-shaped ribbons.
Abstract:
An automotive instrument cluster case is molded of a resin material. A rigid rear wall of the case has a planar outer surface including a connector region having two adjacent flaps, each flap molded with a thin flexible section and a rigid terminal section. Printed circuit paths are applied to the plane outer surface including the flaps. Then the flaps are deformed into the case, with the flexible section being curved and the terminal sections being spaced apart with the circuit paths forming terminal strips facing one another to form a connector socket. Interlocking stop elements molded on the inner surface hold the flaps apart to receive a male connector.
Abstract:
For packaging a semiconductor device, a metal plate is formed to include a central plate portion and a peripheral plate portion extending outwardly from the central plate portion. The central plate portion has a first surface for mounting the semiconductor device and has a second surface opposite to the first surface in a predetermined direction. The peripheral plate portion is bent to face the second surface of the central plate portion and extends substantially along a reference plane which is perpendicular to the predetermined direction. The peripheral plate portion has a particular portion projecting from the reference plane opposite the central plate portion. An insulator layer is deposited on the metal plate. In addition, a conductive pattern is formed on the insulator layer. The insulator layer extends along the metal plate from the first surface of the central plate portion to the peripheral plate portion to cover the particular portion. The conductive pattern extends along the insulator layer from the central plate portion to the particular portion.
Abstract:
A printed circuit board device comprising at least two printed circuit boards in superposition to connect their interconnection patterns, and a positioning member for putting the two boards into registry when being superimposed, the positioning member including a hole provided in one of the boards, an extension provided on the other board and arranged to be inserted into the hole, and a pair of marks for position registry provided on the respective boards.
Abstract:
A method for attaining a tolerance-insensitive connection of a conductor track foil with contact pins of an electrical component. The conductor track foil includes two insulating layers with an intervening conducting layer with lands in the upper layer for soldering the conductive layer to the contact pins of the electrical component. The conductor track foil is lowered, positionally correctly, onto the electrical component by use of a mounting device. The bottom insulating layer and the conducting layer of the soldering lands, which are free of an insulating layer on the top, are pierced by the contact pins extending at right angles to the conductor track foil. The conductor track foil is released by the mounting apparatus. A soldered connection is made between the lands and the contact pins. As a result, an electrically reliably gap free conducting connection is attainable even if the contact pins are eccentrically associated with the soldering lands.
Abstract:
A method and apparatus is provided for forming a power distribution system during a punching operation. A planar member of conductive material is located proximate to the substrate upon which the power distribution system is to be formed. A punch used to form the conductors from the planar member and deposit the conductors on the substrate. The action of the punch causes mechanical interference between the conductor and the substrate thereby securing the conductor to the substrate.