本发明的导电连接片1系由具备树脂组成物层11、13与金属层12之积层体而构成者,树脂组成物层11、13系满足下述要件A者。使用该构成之导电连接片1,应用于形成端子彼此间电连接之连接部时,令经加热熔融之金属材料选择性地凝集于端子彼此之间以形成连接部,可在其周围形成由树脂成分而构成的密封层。其结果由于可以树脂成分被覆连接部的周围,故可使连接部固定。又,由于可借由密封层而确保邻接的端子间之绝缘性,所以在邻接的端子彼此之间可确实地防止泄漏电流产生。要件A:在将以低熔点的金属材料而构成之金属球的至少一部份配置在树脂组成物层11、13中的状态下,依照JIS Z 3197规定的附焊锡用树脂系助焊剂试验方法,加热至前述金属球的熔融温度以上,然后测定前述金属球的湿润扩散率时,该湿润扩散率为37%以上。

The present invention relates to a conductive connecting sheet 1 which is constructed from a laminate body comprising resin composition layers 11, 13 and a metallic layer, in which each of the resin composition layers 11, 13 satisfies the following requirement A. In the case where the conductive connecting sheet 11 having the above construction is used for forming a connecting portion that electrically connects terminals together, it is possible to form the connecting portion by selectively aggregating a heated and fused metallic material between the terminals and to form a sealing layer composed of the resin component around the connecting portion. As a result, since the connecting portion can be covered by the resin component, it is possible to fix the connecting portion. Further, since insulation properties between the adjacent terminals can be secured by the sealing layer, it is possible to reliably prevent a leak current from flowing between the adjacent terminals. [Requirement A]In a state that at least a part of metallic balls consisted of a metallic material having a low fusing point is disposed between the resin composition layers 11, 13, when the metallic balls are heated above the fusing temperature of the metallic material and then wettability and spreadability of the metallic balls are measured according to Testing Methods for Soldering Resin-based Fluxes determined by JIS Z 3197, the wettability and spreadability becomes 37% or higher.