Patent ID: 8274144
Filing Date: 2012-09-25
Classification: H01L

Abstract:
1. A package on package (POP) comprising: a first package which comprises a first substrate having a first insulating substructure and first conductive elements integral with the first insulating substructure, and a first semiconductor chip attached to the first substrate and electrically connected to respective ones of the first conductive elements; and a second package stacked on and fixed to the first package, and which comprises a second substrate including second insulating substructure and second conductive elements integral with the second insulating substructure, and a second semiconductor chip attached to the second substrate and electrically connected to respective ones of the second conductive elements, wherein the first package further comprises an encapsulant which covers the first semiconductor chip, and conductive elastic members which are embedded in the encapsulant, each of the elastic members having a part thereof exposed by the encapsulant and electrically connected to respective ones the first and second conductive elements, wherein the elastic members are helical springs.