Abstract: The present invention relates to electronic components assembly for electrically connecting electronic components to each other, wherein a wiring formed on a surface of a first electronic component and a wiring formed on a surface of a second electronic component face each other, and are bonded to each other with an electric conductor interposed therebetween, so as to electrically connect the first electronic component and the second electronic component. The electric conductor is a resin composition containing solder or conductive filler.

Abstract: A wiring method is provided in which an insulating layer is formed on a surface of a semiconductor device 1 of which a plurality of connecting terminals are exposed, a resin film is formed on a surface of the insulating layer, a groove of a depth equal to or exceeding a thickness of the resin film is formed from a surface side of the resin film so that the groove passes in a vicinity of connecting terminals that are to be connected, and furthermore communicating holes which reach the connecting terminals to be connected from this portion that groove passes in the vicinity thereof are formed.

Abstract: A circuit board H10 according to the present invention is a circuit board H10 in which an electric circuit H6 including a wiring section H6a and a pad section H6b is provided in the surface of an insulating base substrate H1. The electric circuit H6 is configured such that a conductor H5 is embedded in a circuit recess H3 formed in the surface of the insulating base substrate H1, and the surface roughness of the conductor H5 is different in the wiring section H6a and the pad section H6b of the electric circuit H6. In this case, it is preferable that the surface roughness of the conductor H5 in the pad section H6b is greater than the surface roughness of the conductor H5 in the wiring section H6a.