Patent ID: 8420430
Filing Date: 2013-04-16
Classification: B81B,H01L

Abstract:
1. A fabrication method of a package structure having at least a Micro Electro Mechanical System (MEMS) element, comprising the steps of: preparing a wafer having a plurality of electrical connection pads and the at least an MEMS element; disposing a plurality of lids on the wafer for covering the at least an MEMS element, respectively, wherein each of the lids has a metal layer formed thereon; electrically connecting the electrical connection pads and the metal layer with a plurality of bonding wires; forming an encapsulant on the wafer for covering the lids, the bonding wires, the electrical connection pads and the metal layer; removing a portion of the encapsulant so as to separate each of the bonding wires into a first sub-bonding wire and a second sub-bonding wire, wherein top ends of the first sub-bonding wire and the second sub-bonding wire are exposed from a top surface of the encapsulant, the first sub-bonding wires electrically connecting to the electrical connection pads, and the second sub-bonding wires electrically connecting to the metal layer; forming a plurality of metallic traces on the encapsulant for electrically connecting to the first sub-bonding wires, respectively; forming a plurality of bumps on the metallic traces, respectively; and performing a singulation process to obtain a plurality of package structures each having the at least an MEMS element.