| CPC H01L 23/49582 (2013.01) [H01L 21/4821 (2013.01); H01L 23/49503 (2013.01); H01L 23/49541 (2013.01); H01L 24/48 (2013.01); H01L 2224/48249 (2013.01)] | 19 Claims |
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1. A leadframe, comprising:
a die pad; and
a sheet structure defining a void surrounding the die pad and including a plurality of leads, each lead of the plurality of leads including a first portion, a second portion, and a third portion, the second portion being further from the die pad than the first portion and the second portion being offset relative to the first portion, the third portion being transverse to the first portion, transverse to the second portion, and extending from the first portion to second portion, the first portion having a first surface material, and the second portion having a second surface material that is different from the first surface material,
wherein the first portion, the second portion, and the third portion include a base material different from the first surface material and different from the second surface material, the first surface material is on the base material of the first portion, and the base material of the second portion is under and surrounded by the second surface material,
wherein a cross-section of a lead at a cut-off line from the sheet structure includes the base material exposed from the second surface material, and
wherein the third portion includes a plurality of side surfaces of the base material that are exposed from the first and second surface materials.
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