Patent ID: 6929980

Claim:
A manufacturing method of a flip chip package, comprising: providing a chip having a plurality of bumps disposed on the active surface of the chip; mounting a substrate to the chip through the bumps to form a gap between the active surface of the chip and an upper surface of the substrate and have the chip disposed above the substrate; filling an underfill in the gap; partially hardening the underfill to form a partially hardened underfill; flipping a first combination of the substrate, the partially hardened underfill and the chip to have the active surface of the chip faced upward and the upper surface of the substrate faced downward; fully hardening the partially hardened underfill to have the partially hardened underfill transformed into a fully hardened underfill; and flipping a second combination of the chip, the substrate and the fully hardened underfill to have the substrate disposed below the chip.