Patent ID: 7012325

Claim:
An ultra-thin semiconductor package device comprising: a lead frame having a die pad, a plurality of leads disposed around the die pad, and a tie bar connected to the die pad, said die pad including a chip attaching part having a first thickness and a peripheral part surrounding and protruding away from the chip attaching part; first and second semiconductor chips each including a plurality of electrode pads, wherein the first semiconductor chip is bonded to a top surface of the chip attaching part and the second semiconductor chip is bonded to a bottom surface of the chip attaching part; a package body encapsulating the semiconductor chips; and bonding wires configured to electrically connect the plurality of electrode pads and the leads, said leads having inner leads encapsulated with the package body to which the bonding wires are bonded and outer leads exposed from the package body, wherein the inner leads having a second thickness, wherein the first thickness is smaller than the second thickness, wherein the peripheral part has a height equal to the second thickness of the inner leads, and wherein the peripheral part protrudes only in a direction toward the second semiconductor chip.