A resin multilayer board includes an insulating substrate including a first main surface and mounting electrodes only on the first main surface. The insulating substrate includes first and second resin layers that are laminated. The Young's modulus of the second resin layers is higher than that of the first resin layers. The first and second resin layers are arranged in a distributed manner along a lamination direction of the first and second resin layers. The insulating substrate includes a first and second portions that are two equally divided portions of the insulating substrate in the lamination direction and are respectively positioned closer to the first main surface and farther from the first main surface, and a volume ratio of the second resin layers in the first portion is higher than a volume ratio of the second resin layers in the second portion.

A bonded substrate includes a substrate, a metal plate forming a stacked state with the substrate, and bonding member. The metal plate has a first surface on the substrate side and a second surface opposite; wherein an edge of the first surface is located outside an edge of the second. The bonding member is disposed between the substrate and plate to bond the plate and substrate, and protrudes from the edge over an entire periphery of the plate. In cut surfaces obtained by cutting the bonded substrate, a peripheral surface length (A) from a portion corresponding to a peripheral edge of the first surface to a corresponding portion of the second, protrusion length of the bonding member, and thickness (C) of the metal plate satisfy first and second expressions.

0.032≤B/(A+B)≤0.400  (First Expression)

0.5 (mm)≤C≤2.0 (mm)  (Second Expression)

A wiring board (10) includes a substrate (11) that is transparent and a wiring pattern region (20) that is disposed on the substrate (11) and that includes a plurality of wiring lines (21, 22). The wiring pattern region (20) has a sheet resistance of less than or equal to 5 Ω/sq, and each wiring line (21, 22) has a maximum width of less than or equal to 3 μm when viewed at a viewing angle of 120°.

A printed wiring board includes an insulation layer, conductive pads formed on the insulation layer and positioned to connect an electronic component, and a conductive wiring pattern including first and second conductive patterns and formed on the insulation layer such that the conductive wiring pattern is extending between the conductive pads. The first pattern includes first wiring lines, the second pattern includes second wiring lines, the first and second conductive patterns are formed such that the first wiring lines and the second wiring lines are alternately arrayed on the insulation layer, each of the first wiring lines includes a first metal layer formed on an interface with the insulation layer, each of the second wiring lines includes a second metal layer formed on an interface with the insulation layer, and the first metal layer includes a metal material which is different from a metal material forming the second metal layer.

A printed circuit board (PCB) having a reliable electrical connection with connection terminals and a semiconductor package including the PCB, the printed circuit board including: a substrate base; a plurality of pads disposed on upper and lower surfaces of the substrate base; and a solder resist layer configured to cover at least a portion of the upper and lower surfaces of the substrate base, wherein at least some of the plurality of pads are groove pads comprising at least one annular groove in a side opposite to the substrate base.

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.

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 carrier substrate (1) that includes an insulation layer (11) and a metal layer (12), wherein a flank profile (2), in particular an etching flank profile, at least zonally borders the metal layer (12) in a primary direction (P) extending parallel to the main extension plane (HSE), wherein, viewed in the primary direction (P), the flank profile (2) extends from a first edge (15) on an upper side (31) of the metal layer (12), which faces away from the insulation layer (11), to a second edge (16) on a lower side (32) of the metal layer (12), which faces the insulation layer (11), characterized in that the flank profile (2), viewed in the primary direction (P), has at least one local maximum (21) and at least one local minimum (22).

A printed circuit board includes a first insulating layer; a pad disposed on the insulating layer and having a protrusion; and a protective layer disposed on the insulating layer and having an opening exposing at least a portion of the pad. The protrusion protrudes from one surface of the pad and is buried in at least one of the insulating layer and the protective layer.

A ceramic wiring board that includes a ceramic insulator and a via-conductor. The ceramic insulator includes a crystalline constituent and an amorphous constituent. The via-conductor includes a metal and an oxide. The crystalline constituent and the oxide include at least one metal element in common. A tubular region having a thickness of 5 μm adjoins and surrounds the via-conductor and has a higher concentration of the metal element than the ceramic insulator.