Security element, electronic card, electronic payment terminal and corresponding assembly process . The technique proposes a security element (1), called a security dome, intended to be stuck on an electronic card (20), the security element comprising at least: a metal part (11) intended to be in contact with at least one electrical circuit of said electronic card; a protective part (12) covering said metal part (11) and having a first face (121) comprising an adhesive portion intended to ensure the bonding of said security element (1) on said electronic card by an automatic assembly process comprising at least one reflow step, said metallic part (11) and protective part (12) being resistant to the temperatures used during said reflow step. FIGURE 1a
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