Abstract:
A planar metallic foil is formed defining a lie plane which includes a supporting frame for a mount pad and corresponding leads being short-circuited to the mount pad. The mount pad is then down-set on a plane being parallel to the lie plane so as to keep at least a group of leads on the lie plane and separate by shearing the mount plane from the group of leads. A die is then mounted on a first surface of the mount pad. Electrical connections are then formed between the die and the group of leads. The frame is then encapsulated in a protective package so as to leave a second surface of the mount pad, being opposite to the first surface, exposed from the protective package.
Abstract:
A semiconductor electronic device is disclosed, which includes a die of a semiconductor material and a holder connected electrically together by wire leads of copper, the semiconductor material die being formed with a plurality of contact pads; the device being characterized by having a welding stud bump of a metal material selected from a group comprising gold, palladium, and alloys thereof, formed on each contact pad in said plurality, each copper wire lead being welded with one end on a stud bump and with the other end to said holder. This electronic device is highly reliable and can be fabricated simply at a low cost.
Abstract:
A semiconductor electronic device includes a die of semiconductor material and a support. The die of semiconductor material includes an integrated electronic circuit and a plurality of contact pads associated with the electronic circuit and connected electrically to the support by wire leads. Each contact pad may include a lower layer of aluminum, copper, or alloys thereof, and an upper layer including at least one film of a metal and/or metallic alloy including nickel, palladium, or alloys thereof, and being deposited by an electroless chemical process.