Patent ID: 9666520
Date: 2017-05-30
CPC Classifications: H01L

Claim:
1. A package, comprising: a first die having a first redistribution layer (RDL) disposed on a first side of a first substrate; a second die having a second RDL disposed on a first side of a second substrate, the first RDL bonded to the second RDL; a third die having a third RDL disposed on a first side of a third substrate, the third die mounted over the second die, the second die disposed between the first die and the third die; a first molding compound disposed over the first die and extending along sidewalls of the second die; first vias extending through, and electrically isolated from, the second substrate, the first vias each contacting a conductive element in the first RDL or the second RDL, wherein at least one of the first vias extends from a top surface of the first molding compound through a bottom surface of the first molding compound into the first RDL; second vias extending through, and electrically isolated from, the third substrate, the second vias each contacting a conductive element in the third RDL or one of the first vias; first spacers interposed between the second substrate and one or more of the first vias and at least one of the first spacers extending through the second substrate, wherein the at least one of the first spacers extends into the molding compound between the molding compound and the at least one of the first vias; and second spacers interposed between the third substrate and one or more of the second vias and at least one of the second spacers extending through the third substrate.