Package on package structure and method for manufacturing same

A package on package structure, comprising:

• a connection substrate, the connection substrate comprising a main body and a plurality of electrically conductive posts attached to the main body, the main body having a first surface and an opposite second surface, each electrically conductive post passing through the first surface and the second surface, and opposite ends of each electrically conductive post protruding out of the main body;
• a first package device attached on the first surface of the connection substrate, the first package device comprising a circuit substrate and a semiconductor chip packaged on the circuit substrate, the circuit substrate comprising a plurality of first solder pads aligned with the electrically conductive posts, and each first solder pad being in contact with and electrically connected to a corresponding one of the electrically conductive posts;
• a package adhesive attached on the second surface of the connection substrate, the package adhesive covering the second surface of the connection substrate and the semiconductor chip, and an end surface of each electrically conductive post furthest away from the first package device being exposed at the package adhesive;
• and
• a second package attached on the end surfaces of the electrically conductive posts furthest away from the first package device, the second package device comprising a plurality of solder balls, the solder balls aligned with the electrically conductive posts, and each solder ball being soldered to the end surface of the corresponding electrically conductive post which is exposed at the package adhesive.