Patent ID: 8736030
Filing Date: 2014-05-27
Classification: H01L

Abstract:
1. A quad flat non-leaded (QFN) package structure with an electromagnetic interference (EMI) shielding function, comprising: a lead frame having a die pad, a plurality of supporting portions connecting to the die pad, and a plurality of leads disposed at a periphery of the die pad and separated from the die pad by a predetermined distance, wherein each supporting portion has a step portion on a top surface of the supporting portion; a chip mounted on the die pad; a plurality of bonding wires electrically connecting to the chip and the leads; an encapsulant for encapsulating the chip, the bonding wires and the lead frame but exposing side and bottom surfaces of the leads and a bottom surface of the die pad, wherein the step portion is embedded in the encapsulant, and a bottom surface of each lead is exposed from the encapsulant; and a shielding film disposed on top and side surfaces of the encapsulant and electrically connected to the supporting portions, wherein the shielding film contacts a portion of a side surface of the supporting portion, and a rest portion of the side surface of the supporting portion is exposed.