A circuit board with conductive wiring which is precisely shaped and sized includes a two-part conductive element, namely a first conductive wiring layer and a second conductive wiring layer, a first cover film and a second cover film. The first conductive wiring layer and the second conductive wiring layer are in direct contact to each other. A projection of the first conductive wiring layer and a projection of the second conductive wiring layer along a direction perpendicular to the circuit board overlap with each other. The first and the second cover films wrap the first and the second conductive wiring layers, respectively.

A glass wiring board that can be kept from cracking by better preventing concentration of stresses in a glass plate on which a conductor layer including an electrolytic copper plating layer is provided, the wiring board includes: a glass plate; a first metal layer covering at least a part of the glass plate; and a second metal layer covering at least a part of the first metal layer, and the area of the first metal layer in contact with the second metal layer is smaller than the area of the second metal layer facing the first metal layer.

A magnetic wiring circuit board includes an insulating layer; a wire disposed on a one-side surface in a thickness direction of the insulating layer and having a one-side surface in the thickness direction disposed to face the one-side surface in the thickness direction of the insulting layer at spaced intervals thereto, an other-side surface in the thickness direction in contact with the one-side surface in the thickness direction of the insulating layer, and side surfaces each connecting an end edge of the one-side surface in the thickness direction to an end edge of the other-side surface in the thickness direction; and a magnetic layer containing a magnetic particle having a shape of an aspect ratio of 2 or more and embedding the wire.

A circuit board includes a protective film of such a type that a mating contact slides on the protective film and rides over a pad, and is prevented from deteriorating due to attachment and detachment. A circuit board 10 includes a plate-shaped base body 40, a pad 20 formed on a surface of the base body 40 and responsible for electrical contact with a mating contact, and a protective film 30 that spreads on the surface of the base body 40 in contact with an edge of the pad 20. The edge of the pad 20 and a portion, which contacts the edge of the pad 20, of the protective film 30 respectively have heights consecutive to each other. The pad 20 contacts, by causing the mating contact that has slid in a sliding direction in contact with the protective film 30 to ride over the pad 20, the mating contact that has ridden over the pad 20.

An electric circuit board includes an insulating substrate, a metal plate, and a brazing material with which the insulating substrate and the metal plate are joined together. The metal plate has a side surface over which recessed portions are scattered. The side surface of the metal plate has lines in regions around the recessed portions. The metal plate is made of copper or a copper alloy. The brazing material has a side surface that is continuous with the side surface of the metal plate. The brazing material is a silver-copper brazing alloy. A ratio of copper on the side surface of the brazing material is higher than a copper component ratio of the silver-copper brazing alloy.

A printed circuit board is provided. The printed circuit board includes: an extending region extending along one direction, and a bending region configured to bend with respect to the extending region. The extending region and the bending region includes a non-conductive layer, a first conductive layer disposed on one surface of the non-conductive layer, a second conductive layer disposed on the other surface of the non-conductive layer, and at least one via hole penetrating the non-conductive layer, the first conductive layer, and the second conductive layer. In the bending region, a cross-sectional area of the via hole in contact with the first conductive layer is less than a cross-sectional area of the via hole in contact with the second conductive layer.

A metal foil layer includes a metal foil layer upper main surface, a metal foil layer lower main surface with a surface roughness greater than that of the metal foil layer upper main surface, and a metal foil layer side surface that is a surface of the metal foil layer excluding the metal foil layer upper main surface and the metal foil layer lower main surface. The metal foil layer upper main surface is in contact with an upper resin layer. The metal foil layer lower main surface is in contact with a lower resin layer. A portion of a lower main surface of the upper resin layer and a portion of an upper main surface of the lower resin layer are in contact with each other to define a layer interface. In a cross section of the metal foil layer, the metal foil layer side surface includes an outer point and an inner point where the upper resin layer is in contact with the side surface, and the inner point is below the outer point and inward of the outer point.

A printed wiring board includes a first resin insulating layer, a conductor layer on the first resin insulating layer, and a second resin insulating layer formed on the first resin insulating layer such that the second resin insulating layer is covering the conductor layer. The conductor layer includes a first circuit having a width of 15 μm or less and a rectangular cross-sectional shape, a second circuit having a trapezoidal cross-sectional shape, a third circuit, a fourth circuit, a fifth circuit, and a sixth circuit, a space between the first and third circuits has a width of 14 μm or less, a space between the first and fourth circuits has a width of 14 μm or less, a space between the second and fifth circuits has a width of 20 μm or more, and a space between the second and sixth circuits has a width of 20 μm or more.

A printed wiring board includes a first insulating layer, a conductor layer on the first insulating layer, and a second insulating layer formed on the first insulating layer and covering the conductor layer. The conductor layer includes first, second and third circuits, the first circuit has first width of 15 μm or less, the first and second circuits have second space between the first and second circuits such that the second space has second width of 14 μm or less, the first and third circuits have third space between the first and third circuits such that the third space has third width of 20 μm or more, and the first circuit has first lower and upper surfaces, and second and third side walls such that second angle between the second wall and the first lower surface is larger than third angle between the third wall and the first lower surface.

The present invention relates to a method for manufacturing an electronic or electrical system, the method comprising the layer-free production of at least one physical structure (101, 102) which is designed to guide electromagnetic waves, using at least one additively operating apparatus, wherein the layer-free production of the spatial, layer-free structure comprises the simultaneous or sequential application and/or removal of one or more materials in the spatial arrangement, as a result of which the electronic or electrical system is partially or completely formed. The invention further relates to a system which is manufactured in accordance with the method.