| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board provided with metal foils, a metal foil and a pattern conductor layer, or pattern conductor layers which are provided adjacent to each other through the intermediary of an insulating layer and electrically connected together with a bump (projection) that is formed by the plastic deformation of the metal foil or the pattern conductor layer itself. SOLUTION: The metal foil is placed on the surface of a first type plate-like elastic body equipped with a plate-like elastic material on its surface, and a second type body equipped with a thrust pin or a projection is reciprocated with strokes long enough to enable the tip of the pressing pin or the projection to bear against the surface of the elastic material at a right angle with it and to bite into the plate-like elastic material through the intermediary of the metal foil to plastically deform the metal foil. COPYRIGHT: (C)2005,JPO&NCIPI
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