Abstract:
A lead-frame (400) for electronic devices (500) is proposed; the lead-frame is produced from a metal plate and includes a bearing structure (105) arranged in a first plane, and for each electronic device a support element (420) spaced apart from the first plane having a first surface (512) facing the bearing structure for mounting at least one chip (205) and an opposed second surface (515) for being exposed from the electronic device, the second surface being arranged in a second plane, and a plurality of interconnection elements (115) connecting the support element to the bearing structure. For each electronic device the lead-frame further includes an intermediate area (425) between the support element and the interconnection elements, the intermediate area being arranged in a third plane between the first and the second planes.
Abstract:
A method for manufacturing semiconductor electronic devices (1) comprising the step of:
forming, from a plane metallic foil defining a lie plane, a supporting frame (2) comprising a mount pad (3) for said devices and corresponding leads (4) being short-circuited to said mount pad (3), characterised in that it comprises the steps of:
downsetting said mount pad (3) on a plane being parallel to said lie plane keeping at least a group of leads (4) on said lie plane and separating by shearing said mount plane (3) from said group of leads (4), mounting a die on a first surface of said mount pad (3), forming the electrical connections between said die and said group of leads (4), encapsulating said frame (2) in a protective package (6) so as to leave the second surface of said mount pad (3), being opposite to said first surface, exposed from said protective package (6).