Patent ID: 7145223

Claim:
A semiconductor device comprising: a first die pad having a first surface and a second surface opposite to said first surface; a second die pad; a first semiconductor chip mounted on the first surface of the first die pad; a chip-shaped electronic component mounted on the second die pad; a plurality of leads arranged around the first die pad; a plurality of metal wires for electrically connecting the first semiconductor chip and the chip-shaped electronic component to the leads; and an encapsulation resin part for integrally mold-encapsulating the first die pad, the second die pad, part of each of the leads, the first semiconductor chip, the chip-shaped electronic component and the metal wires, said encapsulation resin part being configured such that the second surface is one of exposed to outside the encapsulation resin part and facing a portion of the encapsulation resin part which extends to a bottom surface of the encapsulation resin part, wherein each of the leads has an inner lead portion mold-encapsulated within the encapsulation resin part and an outer lead portion protruding outside from the encapsulation resin part, the first die pad is provided in a position below boundary portions between the inner lead portions and the outer lead portions of the leads, the chip-shaped electronic component has a smaller thickness than the first semiconductor chip, and the second die pad is formed by increasing a width of at least one of the inner lead portions and has a face thereof used for mounting the chip-shaped electronic component on the same side as a face of the first die pad used for mounting the first semiconductor chip, wherein a width of one part of the inner lead portion is larger than a width of another part of the inner lead portion, the plurality of leads are provided at both sides of the first die pad sandwiched therebetween, each of the plurality of leads facing the first die pad, the first die pad is connected to two supporting leads and at least one of the plurality of leads connected to a ground, and the two supporting leads extend at both sides of the first die pad sandwiched therebetween, each of the two supporting leads being connected to the first die pad at an outer edge between two sides of the first die pad which faces the plurality of leads, wherein a width of one part of at least one of the two supporting leads is larger than a width of another part of said at least one of the two supporting leads.