Packaging substrate having interposer

摘要

A packaging substrate (100) including following elements is provided. The insulation supporting layer (120) is disposed on a first surface (112) of the multilayered interconnect board (110) and has an opening region (R10). A portion of the first surface (112) is exposed at the opening region (R10). The interposer (130) is disposed on the first surface (112) at the opening region (R10). A third surface (130A) of the interposer (130) faces the first surface (112) of the multilayered interconnect board (110). A stress releasing gap (136) is between an outer-sidewall of the interposer (130) and an inner-sidewall of the opening region (R10). The compliant layer (170) is disposed between the third surface (130A) and the first surface (112). The interposer (130) has through holes (132) and conductive posts (134) disposed in the through holes (132). The conductive posts (134) penetrate the compliant layer (170) and electrically connect with the multilayered interconnect board (110). The redistribution layer (140) is disposed on a fourth surface (130B) of the interposer (130) and is electrically connected with the conductive posts (134).