Patent ID: 7199479

Claim:
A chip package structure, comprising: a carrier, having a first surface and a second surface opposite to the first surface; a chip, having an active surface on which a plurality of bumps are formed, wherein the chip is bonded to the first surface of the carrier with the active surface of the chip facing thereto and electrically connecting to the carrier via the bumps; and an underfill, filling between the chip and the carrier, wherein the portion of the underfill near the chip serves as a first underfill portion, the portion of the underfill near the carrier serves as a second underfill portion, and the Young's modulus of the first underfill portion is smaller than the Young's modulus of the second underfill portion, and a glass transition temperature (Tg) of the first underfill portion is smaller than 100° C. and a glass transition temperature (Tg) of the second underfill portion is larger than 140° C.