Abstract:
An apparatus (10) includes a printed circuit board. The printed circuit board includes a group of metal traces (12) located along a surface or interface of the printed circuit board and a dielectric layer (20). The metal traces of the group are parallel in a sequence common straight zones (16) and are bent in a common direction in a local common bend zone (18) located between two of the common straight zones. In and next to the local common bend zone, said same dielectric layer is in contact with a longer segment of one of the metal traces than of another of the metal traces of the group.
Abstract:
A pattern forming method ejects droplets of ink onto a base material by an inkjet method. A base material (Z) has a first region (42) and a second region (44) that differ in surface energy. At least two types of ink, a first ink (52a) that has volatile characteristics and a second ink (54a) that has curing characteristics, are used in the ink. The first ink (52a) and the first region (42) are lyophilic, and the second ink (54a) and the second region (44) are lyophilic. The pattern forming method has a droplet ejection step in which the first ink (52a) is ejected to the first region (42) and the second ink (54a) to the second region (44) simultaneously by a multipass system.
Abstract:
A through wiring substrate includes a substrate having a first face and a second face; and a through-wire formed by filling, or forming a film of, an electrically-conductive substance into a through-hole, which penetrates between the first face and the second face. The through-hole has a bend part comprising an inner peripheral part that is curved in a recessed shape and an outer peripheral part that is curved in a protruding shape, in a longitudinal cross-section of the through-hole, and at least the inner peripheral part is formed in a circular arc shape in the longitudinal cross-section.
Abstract:
Ensemble formé d'au moins deux dispositifs électroniques, par exemple des cellules d'affichage à cristal liquide superposées (36, 40), chacune de ces deux cellules (36, 40) étant délimitée par deux substrats (22, 24, 26, 28) réunis et maintenus à distance constante l'un de l'autre par un cadre de scellement, au moins une électrode et une contre-électrode correspondante étant structurées sur les faces en regard des substrats (22, 24, 26, 28), les électrodes venant à l'une de leurs extrémités affleurer le rebord du substrat (22, 24, 26, 28) sur lequel elles sont structurées, des premières et deuxièmes pistes conductrices (37, 39) reliant les électrodes aux ports d'un circuit électronique de commande (30) monté sur le dos (32) du dispositif d'affichage (20), les premières pistes conductrices (37) s'étendant d'abord parallèlement aux deuxièmes pistes conductrices (39) puis s'élargissant et passant sous ces deuxièmes pistes conductrices (39) à l'endroit où ces deuxièmes pistes conductrices (39) s'interrompent.
coating the upper side (5) of the conductive path or track (1) with a thick layer of electrically conductive coating material (4); and reflowing so that the upper edges (8, 9) of the track (1) are also covered with a relatively thick layer of coating material.
The track (1) is thus embedded in a mass of coating material having more or less a rounded-shaped cross-section and the sharp upper edges (8, 9) of this track, where a strong electrical field is generally produced, are smoothed. As a result, the strength of the electrical field around the track (1) is reduced. In a preferred embodiment, a second track (13) similar to the first track (1) is created symmetrically thereto on the opposite surface (14) of the printed circuit board (3). This second track (13) is brought to the same potential as the first track (1) and is coated in a same way. Therefore, the electrical fields still produced at the lower edges (10, 11) of the track (1), which are not totally embedded in the mass of coating material because the latter do not adhere on the surface (2) of the printed circuit board (3), are counterbalanced by the electrical fields produced at corresponding opposite edges (15, 16) of the second track (13). The strength of the global electrical field around the tracks (1, 13) is thereby drastically reduced.
Abstract:
The radiation noise suppression effect is enhanced by providing an insulation layer which is formed so that the circuit pattern is covered excepting at least a part of power source pattern or ground pattern on the substrate on which circuit pattern is formed, and a conductive layer which is formed so as to be connected to the uninsulated part of the power source pattern or the ground pattern on the insulation layer, by modifying pattern shape of the conductive layer and the insulation layer or by increasing or reducing the number of these layers.
Abstract:
Embodiments are disclosed for a printed circuit board 700. An example printed circuit board includes a ground plane 702 comprising a pattern of an electrically conductive material. The example printed circuit board further includes a circuit trace 704 disposed adjacent to the ground plane, where one or more characteristics of one of more of the pattern of the electrically conductive material in the ground plane and the circuit trace vary based upon a directional change of the circuit trace. A curved region 706 of the circuit trace is formed by a conductive material different from a conductive material included in uncurved regions of the circuit trace.