TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Module: The solar-cell module consists of photovoltaic cells having a surface electrode. The photovoltaic cells are electrically connected to the surface electrode through the metal foil adhered by an adhesion component containing electroconductive particles.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Metals: The metal foil contains copper, silver, gold, iron, nickel, lead, zinc, cobalt, titanium, magnesium, tin and/or aluminum.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Properties: The distance from a top portion of protrusion to the surface of adhesive layer is 20 mu m or less. The component is electrically conductive between the metallic foil and the conductive material when heat-pressing for connection. The protrusion has a shape in which the top cross-sectional area is smaller than the cross-sectional area of the base. The protrusions are arranged regularly so that the central point interval of an adjacent protrusion top portion is 0.1-5 mm. The height of protrusion is less than the central point interval. The adhesive layer is formed by flow-spreading a solution containing an adhesive agent on the surface of the metal foil having protrusions, and removing the solvent. Another adhesive layer is formed on the adhesive layer. A connection structure is formed by arranging the conductor-connecting component and a conductive material so that the surface of metal foil having protrusions opposes the conductive material through the adhesive layer. The surface of conductive material connected with the metal foil has surface roughness. The conductive material and metal foil are electrically connected through the electroconductive particles.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The adhesive layer consists of a thermosetting adhesive-agent composition containing a latent hardener and electroconductive particles having an average particle diameter less than the height of protrusions.