Patent ID: 8796832

Claim:
A composite wiring device for a semiconductor device that electrically connects an electrode provided on a semiconductor chip with a wiring substrate, the composite wiring device comprising: a wiring device; and a lead frame electrically connected with the wiring device and mounting the wiring device thereon; wherein the wiring device includes an insulating layer, a metal substrate, a copper wiring layer, and a semiconductor chip support portion, the metal substrate being provided on one side of the insulating layer, the copper wiring layer being provided on another side of the insulating layer, the semiconductor chip support portion is provided on the copper wiring layer, the copper wiring layer includes a first terminal, a second terminal and a wiring portion, the first terminal being connected with the electrode provided on the semiconductor chip, the second terminal being connected with the lead frame, the wiring portion connecting the first terminal with the second terminal, the second terminal of the copper wiring layer is electrically connected with the lead frame by means of a second connection part, the lead frame has a die pad and a lead, the die pad mounting the wiring device thereon, the lead being located on an outer side of the die pad the insulating layer, the metal substrate and the copper wiring layer of the wiring device are mounted on the die pad of the lead frame, and the thickness of a central area of the die pad is smaller than that of the lead, the central area mounting the semiconductor chip thereon.