Abstract:
ABREGEL'invention concerne un procédé d'établissement d'une liaison dans un substrat métallique intégré comportant une première couche métallique (300) et une deuxième couche métallique (100) séparées par une couche isolante (200), comportant l'étape de découper une portion (22) de la première couche métallique (300) et une portion correspondante de la couche isolante (23) et ô enfoncer ces portions dans la seconde couche métallique (100).Figure 3.
Abstract:
A printed circuit board through- hole connection that includes an assembled layout of a printed circuit board (10) and formed through holes (20a) by material removed from the first side of the printed circuit board up to the backing (11) and then slightly into the top portion (11a) of the backing. It further includes plated through-holes that connect the backing (11), a ground layer (19) and a signal layer (16), removed plating from the signal layer without the connection removed from the ground layer to the backing and filled through holes from the first side with a non conductive filler (17).
Abstract:
A method of manufacturing a multilayered printed-circuit board and a low-cost clad board. Copper foil layers (19, 24, 33) for forming conductor layers (10, 17, 18) and nickel plating layers (20, 21) for forming etch stop layers (11, 12) are alternately stacked and compressed to form a clad board (34) for a printed-circuit board. The clad board (34) for the printed-circuit board is selectively etched to manufacture a base. External conductor layers (15, 16) are formed on the surface of the base and patterned. The conductor layers (10, 15, 16) are interconnected electrically through conductors blocks (17, 18) formed by etching the copper foil layers (19, 24, 33) and the nickel plating layers (20, 21) to complete the manufacture of multilayered printed-circuit board.
Abstract:
The invention concerns an assembly comprising an electronic card (2) with a printed circuit mounted on a metal substrate (1), and means ensuring said card electrical connection on said substrate (1). The invention is characterised in that said means comprise a cap (4) set in a cavity (3) borne by the metal substrate (1) and extending through a hole (6) in the electronic card (2), said hole (6) edges being metal coated, said cap (4) being soldered to the metal coating (7) on said edges.
Abstract:
An interposer for interconnection between microelectronic circuit panels (260) has contacts (250) at its surfaces. Each contact has a central axis normal to the surface and a peripheral portion adapted to expand radially outwardly from the central axis responsive to a force applied by a pad (262) on the engaged circuit panel. Thus, when the circuit panels (260) are compressed with the interposers, the contacts expand radially and wipe across the pads (262). The wiping action facilitates bonding of the contacts to the pads, as by conductive bonding material (246) carried on the contacts themselves.
Abstract:
An end of a first line and an end of a second line of a first write wiring pattern are arranged on both sides of a third line of a second write wiring pattern. Circular connection portions are provided at the ends of the first line and the second line. In addition, through holes are formed in respective portions of a base insulating layer below the connection portions. Each connection portion comes in contact with a connecting region of a suspension body within the through hole.
Abstract:
Disclosed is a circuit comprising a first printed circuit board (2a) and a second printed circuit board (2b). The first circuit board is provided with a metal supporting board (14) and an insulating layer (8) which electrically insulates the metal supporting board on a surface, the supporting board being without any insulating layer in at least one connection region (10a-10d). The supporting board is metal-coated (12) in the connection region, and a contact (30a) of a semiconductor (30) is electrically contacted on the metal coating of the connection region. The second circuit board is provided with a metal supporting board (2b), an insulator (16) that electrically insulates the metal supporting board (24) on a surface, and a conducting layer (18) that is applied to the insulator. The insulator and the conducting layer have a breakdown region (21) in at least one contact zone, and at least one metal contact pad (20) is arranged in the contact zone in such a way that the contact pad is peripherally disposed at a distance from the insulator and from the conducting layer. The circuit boards in the circuit are separated from one another by an air gap (28) and are mechanically interconnected by at least one power semiconductor device (30).
Abstract:
A method is provided comprising: - applying a layer of a first conductive material to a substrate having a dielectric coating on a conductive core and conductive vias extending through openings in the dielectric coating; - plating and patterning the first conductive material, forming a circuitry layer; - applying a layer of plating resist on the just patterned circuitry layer; - forming openings in the plating resist to expose areas of the patterned circuitry layer to be plated; - plating a second conductive material onto the exposed areas of the first conductive material; and - removing the plating resist.
Abstract:
A method is provided comprising: - applying a layer of a first conductive material to a substrate having a dielectric coating on a conductive core and conductive vias extending through openings in the dielectric coating; - plating and patterning the first conductive material, forming a circuitry layer; - applying a layer of plating resist on the just patterned circuitry layer; - forming openings in the plating resist to expose areas of the patterned circuitry layer to be plated; - plating a second conductive material onto the exposed areas of the first conductive material; and - removing the plating resist.