Abstract:
In a leadless chip carrier (LCC) type semiconductor device, a larger number of soldering pads (3, 8) for connection to an external circuit can be formed for a given package size by using different depths of adjacent grooves (611a, 611b, 621a, 621b) formed along the edge face (612, 622) of the package to receive metallization lines (613a, 613b, 623a, 623b). Adjacent soldering pads are therefore located at different depths from the periphery of the package, so that the risk of short circuits caused by solder bridges between adjacent soldering pads is not increased by the increased density.
Abstract:
Un procede de fabrication d'ensembles de circuits utilise des macro-composants (10) montes sur des substrats de support (20). De maniere a garder un degagement suffisant entre le composant et le substrat et obtenir des liaisons de haute fiabilite, des spheres massives de soudure (16) sont appliquees sur des cales de contact (14) soit sur le composant soit sur le substrat. Apres avoir ammene en contact les cales de contact du porteur et du substrat avec les spheres, la liaison est formee en fondant la soudure tout en maintenant un degagement entre le composant et le substrat d'au moins 0,25mm grace a la tension en surface des spheres de soudure.
Abstract:
A planar charge plate having individual charge electrodes (22) uniformly spaced along one face (14) thereof is provided by cutting grooves (16) into the edge of a blank nonconductive charge plate support structure (10). The surfaces of the structure, including grooves (16) and lands (18), are metallized and printed circuit leads (20) are formed leading from the grooves. The grooves arefilled with an electrically conductive material, such as solder, and thentheface (14) of the structure is lapped to remove excess solder and metal plating from the lands to form the completed planar-faced structure.
Abstract:
A printed circuit board assembly includes a printed circuit board (PCB) having an end. The end includes surfaces defining a plurality of electrically conductive notches therein. A plurality of electrically conductive pins is provided with each pin being received in an associated notch in a press-fitted manner so as to make electrical connection with the PCB.
Abstract:
Die Erfindung betrifft einen Radarsensor (1) mit einer Leiterplatte mit einer elektronischen Schaltung und mit einer Bestückung elektronischer Komponenten und mit einem die Leiterplatte und die darauf angeordnete Bestückung abdeckenden Abschirmdeckel (10, 50), wobei der Abschirmdeckel aus einem Leiterplattenmaterial (11, 51) ausgebildet ist und eine Einbuchtung (12, 52) aufweist, welche Raum für die Aufnahme der Bestückung schafft.
Abstract:
A connector includes an insulated housing having a slot and a transmission assembly located inside the insulated housing. The transmission assembly includes a main circuit board, an expanded circuit board, a plurality of first terminals and at least one second terminal. The expanded circuit board is stacked on the main circuit board and a first lateral side and a second lateral side of the expanded circuit board which are opposite to each other has a plurality of first electrical contacts and at least one second electrical contact, respectively. The first terminals and the at least one second terminal are plugged in the main circuit board. One ends of the first terminals are in electrical contact with the first electrical contacts respectively. The other ends of the first terminals bend and extend towards the second lateral side of the expanded circuit board.
Abstract:
An anti-lightning-combined-stripline-circuit system is provided. The anti-lightning-combined-stripline-circuit system includes a stripline board including circuitry, and a metal ground bar attached to the stripline board. The metal ground bar has a geometry configured to function as a ground for the circuitry and simultaneously function as a lightning ground for a linear array of elements driven by the circuitry.
Abstract:
Provided are a wiring substrate having few burrs in the vicinity of a notch located on a side surface of a substrate main body, in which breakage of a conductor layer provided on the inner wall of the notch is suppressed; a multi-piece wiring substrate array for providing a plurality of the wiring substrates; and a method for reliably producing the multi-piece wiring substrate array. The wiring substrate 1a includes a substrate main body kp which is formed of a plurality of stacked ceramic layers S, which has a rectangular shape in plan view, which has a pair of opposite first and second main surfaces 3 and 2, and which has side surfaces 4 each being located between the paired main surfaces 3 and 2, and having a groove surface 6 located on a side toward the first main surface (back surface) 3 and a fracture surface 5 located between the groove surface 6 and the second main surface 2; and a notch 11 which has a concave shape in plan view, and which is provided on a side surface 4 only on a side toward the first main surface 3 so as to extend in a thickness direction of the side surface 4, wherein, in the side surface 4 having the notch 11, the boundary 7 between the groove surface 6 and the fracture surface 5 has first curved portions R1 on opposite sides of the notch 11, the first curved portions R1 being convex toward the first main surface 3 of the substrate main body kp in side view; and also has a second curved portion R2 on a second-main-surface side of the notch 11, the second curved portion R2 being convex toward the second main surface (front surface) 2 of the substrate main body kp in side view.