Stacked integrated circuit package-in-package system

Claim 1

A stacked integrated circuit package-in-package system comprising: a first device having a first integrated circuit package comprises: a first substrate with a first integrated circuit thereon, the first substrate being a two layer substrate and the first integrated circuit having a first non-active side of the first integrated circuit not attached to the first substrate, first electrical interconnects between the first integrated circuit and a top side of the first substrate, the first electrical interconnects are connected to a first active side of the first integrated circuit, a first top molding compound to cover the first electrical interconnects and a portion of the top side of the first substrate over a portion of the first active of the first integrated circuit, and a first bottom molding compound to cover the first integrated circuit and a bottom side of the first substrate over a first non-active side of the first integrated circuit; and a second device, having a second integrated circuit package, below the first device with the first bottom molding compound is attached with a first adhesive layer and with a second top molding compound of the second device provided between the first device and the second device; and further comprising: a first opening in the first substrate, wherein the first integrated circuit on the first substrate is over the first opening, and the first opening provides space for the first electrical interconnects, a package substrate with the second device, wherein the second device includes the second top molding compound and a second bottom molding compound attached in similar manner to the first device, further electrical interconnects to a second top side of a second substrate of the second device, and a package molding compound to cover the first device, the second device, the further electrical interconnects and the package substrate.