Abstract:
A decoupling capacitor (40) is mounted on a thin auxiliary board (20) and connected by metallization traces (37, 33) on the board to a single pair of plug-in contacts (50, 51) press-fitted into a pair of apertures (36) in a pair of integral tabs (31, 32) extending from the board (30). The auxiliary board (20) and capacitor (40) height is not more than about 0.070 inches. The plug-in contacts (50, 51) are pluggable into a pair of sockets in a printed circuit board. The auxiliary insulative board (20) with its attached capacitor (40) is sandwiched between a surface of a printed circuit board (12) having a plurality of sockets, and the underside of a dual-in-line (DIP) integrated circuit package (11). At least two leads (15a, 14x) of the DIP package (11) are inserted into the pair of insertable contacts (50, 51) in the auxiliary insulative board (20) while the remainder of the DIP package leads are inserted directly into other sockets in the printed circuit board (16a, 16x, 17a, 17x). In one embodiment, other DIP leads pass through clearance holes (69, 68) in a second pair of integral tabs (63, 65). Another embodiment provides for redundant capacitors each connected to separate pairs of contacts (82, 83; 84, 85) on the auxiliary board (81) for interconnection of two ground leads and two power leads of the DIP to respective PC board sockets.
Abstract:
Un dispositif électronique (10) pour véhicule automobile comprend un boîtier tubulaire (12) métallique s'étendant longitudinalement et débouchant à ses deux extrémités (24, 26); le boitier tubulaire (12) comprenant une paroi (31) ayant un profil incurvé comportant des ailettes de refroidissement (34) sur sa surface extérieure (32). Le dispositif électronique (10) comprend également un ensemble de cartes à circuit imprimé (18) comportant une première pluralité (74) de cartes à circuit imprimé (74, 76) comprenant des composants électroniques (19) générant de la chaleur, les cartes à circuit imprimés (74, 76) de l'ensemble étant reliées entre elles par des éléments conducteurs flexible (92, 94). Le dispositif comprend également un premier dissipateur de chaleur (14) agencé à l'intérieur du boîtier tubulaire (12) comprenant une paroi (108) incurvée s'étendant globalement parallèlement à la paroi (31) incurvée du boîtier tubulaire (12). La première pluralité (74) de cartes à circuit imprimé (74, 76) est intercalée entre la surface intérieure (48) incurvée de la paroi (31) du boîtier (12) et la paroi (108) incurvée du premier dissipateur de chaleur (14) de sorte à pouvoir dissiper la chaleur au travers du premier dissipateur de chaleur (14) et de la paroi (31) incurvée équipée d'ailettes de refroidissement (34) du boîtier tubulaire (12).
Abstract:
A flexible applique or patch (30) is used to modify a circuit board (10) by attaching the flexible applique to the back side of a circuit board needing rework. The flexible applique has circuit paths (28') on both its front and back side. The flexible applique also has circuit paths which pass from the front side to the back side of the applique or patch. If additional electrical components are required by the rework, the back side of the applique or patch is provided with pads to which surface mount electrical components are easily attached. Implementing the rework using the applique or patch is simple and easy. The front side of the patch is positioned on the back side of the circuit board, and then attached to the back of the circuit board either by soldering down points along the edge of the patch or by providing an adhesive on the front side of the patch. Using this method, both simple and complex reworks can be quickly accomplished.
Abstract:
The conductors (2) exiting from the housing of a component (1) may be grouped conveniently for one customer but inconveniently for others. Manufacturing components with different groupings for each customer would lose the advantages of quantity. So the exiting conductors (2) are connected to plated through-holes in an inner PCB (5). Fastons are connected to plated holes in an outer PCB (8) in a fashion approved by an individual customer. Bridging connectors which are rigid extend between bondings in opposite holes in the two PCB's. The printed patterns on the boards enable the change of grouping of the terminals. Some bridging connectors may be extensions (7) of the exiting conductors (4). They provide rigidity of the boards and also interconnections. The inner board (5) rests on walls (3) from the housing (1), or on ledges or flanges (13) of the connectors.
Abstract:
The invention provides an electronic product having a double-PCB sandwich structure, comprising a PCB assembly and a casing having an open side, wherein a protuberance is respectively formed on the inner sides of two side walls of the casing in the longitudinal direction, the PCB assembly consists of an electronic component, a base PCB and a main PCB, the length of the base PCB and the length of the main PCB in the longitudinal direction of the casing are substantially equal to each other and slightly smaller than the length of the casing so that the PCB assembly can be installed into the casing by mating with the protuberances.
Abstract:
A multi-layer printed circuit board is disclosed which comprises at least two layers (1) of substrate sandwiching a conductive track. A terminal receiving through hole (2) extends through the layers to receive a conductive terminal, such as the leg of a resistor or lead frame. A conductive link (3) is provided adjacent the terminal receiving hole (2) and extends from at least one surface of the board to the track (1). A conductive path (4) provided on the surface provides an electrical connection between the terminal (2) and the link (3), eliminating the need for electrical connection between the terminal (2) and the track (1) at an internal layer.