Abstract:
A three-dimensional PWB is provided that may include two or more layers stacked together forming a top surface, a bottom surface, and one or more side surfaces, and one or more solder pad situated on at least one of the one or more side surfaces. The one or more solder pads may include exposed voids in the one or more side surfaces. In some cases, the top surface and/or the bottom surface may have one or more solder pad. The one or more solder pads on at least one of the one or more side surfaces may be electrically connected to the one or more solder pads on the top surface and /or the bottom surface. In the illustrative PWB, the top surface and/or the bottom surface may be adapted to be mounted with an inertial sensor. The one or more side surfaces may be adapted to be mounted to a printed wiring board.
Abstract:
A miniature PWB (101) with features that incorporate the required circuitry changes and component footprints (105), which has been enhanced with micro-castellations (111) such as those found on ceramic surface mount packages. The miniature PWB (101) is mounted on the circuit board (125) using techniques well known in the art. This combination of technologies provides an adaptable, durable interconnect methodology, which allows for circuit (109) and part changes (113, 115, 117) without changing the layout of the base printed wiring board (125).
Abstract:
A highly stable piezoelectric oscillator includes a heat-generating component mounted on a base printed circuit board; an erected printed circuit board placed upright on the base printed circuit board by fitting a fitting end part in a fitting slit that is formed to penetrate the base printed circuit board; a piezoelectric resonator which is disposed horizontally and directly on the heat-generating component on the base printed circuit board and whose lead electrode part is connected and fixed on the erected printed circuit board; and an oscillation circuit component to obtain an oscillation output using the piezoelectric resonator as a frequency source. Further, connection pads are arranged opposite from each other on surfaces of the base printed circuit board along both opposing end edges of the fitting slit; arc-shaped side through holes are provided on the inner walls of the fitting slit that correspond to each of the connection pads; and lead pads are arranged so as to have positional relations to their respective connection pads on both surfaces of the fitting end part of the erected printed circuit board; and each connection pad having the side through hole is soldered to each lead pad of the fitting end part.
Abstract:
A method of constructing an image reader module and the image reader are described. The image reader module includes two or more circuit boards in a stacked configuration. Corresponding notches for receiving supports are formed along adjacent edges of the boards, which also have electrical contact points at the edges of each board connected to circuits on the boards. The supports are mounted in the notches between the two or more circuit boards to structurally interconnect the boards. Each of the supports, which may be flex cables or conductive bus bars, have one or more electrical conductors that are electrically connected to the contact points on the boards to electrically interconnect the boards, whereby the connections between the electrical conductors and the contact points form test points for the module. The notches may be substantially rectangular to receive the flex cable or may be slots to receive a bus bar. One end of the structural support flex cable or bus bar may be flush with one of the circuit boards and the other end of the structural support may extend past another one of the circuit boards. The supports may be soldered to the edges of the boards within the notches, which may be initially plated. In the image reader module an image sensor may be located on one of the circuit boards and an illumination assembly may be located on another of the circuit boards.
Abstract:
An electronic device is manufactured using printed circuit board manufacturing processes. In particular, a laminar device comprises a first metal layer (12), a second metal layer (14), at least one layer of device material sandwiched between the first and second metal layers. A first layer of insulating material (40) substantially covers the first metal layer (12). A third metal layer (48) is provided on the first layer of insulating material (40). This third metal layer (48) is divided to provide a first terminal (90) and a second terminal (92). The first terminal (90) is electrically connected to the first metal layer (12) by a conductive interconnect (84) formed through said first layer of insulating material (40), and the second terminal (92) is electrically connected to said second metal layer (14) by a conductive path (68) comprising an insulated conductive channel which passes through and is insulated from said first metal layer (12) and said at least one layer of device material (16). The use of an insulated channel provides a cost effective method of manufacture and maximizes the effective area of device material used. A PTC component is built through this method.
Abstract:
Ein Verfahren zur Kontaktierung der Leiterbahnen einer Schaltungsplatine (1) mit den Leiterbahnen eines Bauteiles (10) in MID-Technologie umfasst folgende Schritte: Auf dem Nutzen, aus dem die Schaltungsplatine gewonnen wird, werden die Leiterbahnen mindestens bis zum Rand der Schaltungsplatine geführt. Längs dieses Randes wird der Nutzen im Bereich der Leiterbahnen mit Durchgangsbohrungen (6d) versehen. Die Durchgangsbohrungen werden galvanisch durchkontaktiert. Die aus dem Nutzen herausgetrennte Schaltungsplatine wird relativ zu dem MID-Bauteil so positioniert, dass die aneinander grenzenden Leiterbahnen von Schaltungsplatine und MID-Bauteil miteinander verlötbar sind. Zweckmäßig erhält die Schaltungsplatine deckungsgleich zu den an ihrem Rand endenden Leiterbahnen rückseitig elektrische Kontaktierungsflächen (6b), welche über metallisierte und durchkontaktierte Bohrungen mit den vorderseitigen Leiterbahnen (5) elektrisch verbunden sind.