Patent ID: 8207603

Claim:
A chip-stacked package structure with a leadframe having inner leads, each inner lead having a plurality of transfer pads, comprising: said leadframe, composed of a plurality of inner leads arranged in rows facing each other, a plurality of outer leads, and a die pad, said die pad being provided between said plurality of inner leads arranged in rows facing each other, positions of a top surface of each of said inner leads in said leadframe being partially coated with an insulation layer and a plurality of metal pads are selectively formed on said insulation layer to define said respective pads; a plurality of offset chip-stacked structures, being set on said die pad and electrically connected to said plurality of inner leads arranged in rows facing each other, wherein each said offset chip-stacked structure comprises: a chip with a bonding area, said bonding area being adjacent to one side edge or two side edges of said chip, wherein said chip is provided with a plurality of first pads in said bonding area and a plurality of second pads outside said bonding area; a first passivation layer provided on said chip, wherein said first passivation layer is provided with a plurality of first openings for exposing said plurality of first pads and said plurality of second pads; a redistribution layer provided on said first passivation layer, wherein said redistribution layer extends from said plurality of second pads to said bonding area and is provided with a plurality of third pads in said bonding area; and a second passivation layer covering said redistribution layer, wherein said second passivation layer is provided with a plurality of second openings for exposing said plurality of first pads and said plurality of third pads; an encapsulant, covering said plurality of offset chip-stacked structures and said leadframe, said plurality of outer leads extending out of said encapsulant; and at least a bus bar being provided between said plurality of inner leads arranged in rows facing each other and said die pad.