US Patent 8940584 Semiconductor packages and methods of forming the same

A semiconductor package including a package substrate having a chip mounting region and a peripheral region and including a ground layer formed in the peripheral region, first solder balls on the package substrate in the chip mounting region, second solder balls on the ground layer, at least one semiconductor chip stacked on the package substrate in the chip mounting region, and a package cap covering the semiconductor chip and contacting the package substrate in the peripheral region may be provided. The package cap is electrically connected to the second solder balls. Methods of fabricating the semiconductor package are also provided.