Patent ID: 7112473
Filing Date: 2006-09-26
Classification: H01L

Abstract:
1. A method for double side stack packaging a plurality of chips, comprising forming a hole through a substrate; attaching a first chip to a bottom surface of the substrate to cover a bottom of the hole by using a thermo compression; electrically interconnecting the first chip to terminals formed on a vertical inner sidewall of the hole using a first wire bonding; coating a first epoxy on the bottom surface of the substrate and the first chip and installing thereon a first heat spreader and then curing the first epoxy; attaching a second chip to a top surface of the substrate to cover a top of the hole by using a second epoxy; electrically interconnecting the second chip to terminals formed on the top surface of the substrate using a second wire bonding; and coating an encapsulation resin on the top surface of the substrate and the second chip and installing thereon a second heat spreader and then curing the encapsulation resin.