Abstract: A module including a circuit board including an insulating layer and one or more layers of copper foil embedded in the insulating layer; an electronic component mounted on the circuit board; a sealing part sealing the electronic component on the circuit board; and a metal film covering side surfaces of the circuit board and surfaces of the sealing part. A part of the copper foil is exposed to the side surfaces of the circuit board, an exposed part of the copper foil has a width of less than 200 ?m, and the copper foil and the metal film are electrically coupled to each other through the exposed part. Thus, occurrence of blushing, crack, or the like, can be prevented.

Abstract: A wiring board includes an insulating resin layer, wirings, and a via-hole conductor. The wirings are disposed through the insulating resin layer therebetween and formed of copper foils. The via-hole conductor penetrates through the insulating resin layer and electrically connects the wirings together. The via-hole conductor includes a resin portion and a metal portion containing copper, tin, and bismuth. The metal portion includes a first metal region including a link of copper particles, a second metal region including, as a main component, at least one of tin, a tin-copper alloy, and a tin-copper intermetallic compound, and a third metal region including bismuth as a main component. The copper particles partially include a plane-to-plane contact with a roughened surface of the copper foil, and the second metal region is partially formed on a surface of the link and on the roughened surface of the copper foil.

Abstract: A module including a circuit board including an insulating layer and one or more layers of copper foil embedded in the insulating layer; an electronic component mounted on the circuit board; a sealing part sealing the electronic component on the circuit board; and a metal film covering side surfaces of the circuit board and surfaces of the sealing part. A part of the copper foil is exposed to the side surfaces of the circuit board, an exposed part of the copper foil has a width of less than 200 ?m, and the copper foil and the metal film are electrically coupled to each other through the exposed part. Thus, occurrence of blushing, crack, or the like, can be prevented.

Abstract: A lighting unit has a light guiding plate having a plurality of corner portions each of which is formed by intersecting adjacent two side surfaces. The side surface between a pair of the corner portions of the light guiding plate forms a light incident face Non-light-emitting portions of a light source correspond to the pair of the corner portions of the light guiding plate, and at least one of the corner portions has an inclined face in contact with the light incident face, the side surface adjacent to the light incident face, and at least one of the top surface and bottom surface, and inclined by an angle ? (90°<?<180°) with respect to the top surface or the bottom surface.

Abstract: A lighting unit has a light guiding plate having a plurality of corner portions each of which is formed by intersecting adjacent two side surfaces. The side surface between a pair of the corner portions of the light guiding plate forms a light incident face. Non-light-emitting portions of a light source correspond to the pair of the corner portions of the light guiding plate, and at least one of the corner portions has an inclined face in contact with the light incident face, the side surface adjacent to the light incident face, and at least one of the top surface and bottom surface, and inclined by an angle &thgr; (90°<&thgr;<180°) with respect to the top surface or the bottom surface.