Patent ID: 7005749

Claim:
A flip chip package structure, comprising: a chip having a front surface and a back surface; a plurality of solder bumps disposed on a front surface of the chip; a substrate, having an upper surface and a lower surface, the substrate further comprising: a first receiving area, formed at the upper surface and having a first inner wall and a first bottom, for receiving the chip; and a second receiving area, formed at the first bottom, and having a second inner wall and a second bottom, for receiving the plurality of solder bumps which electrically couple the chip with the substrate; wherein the front surface of the chip, the second inner wall, and the second bottom define a space between the chip and the substrate; a heat sink, disposed over the upper surface of the substrate and a back surface of the chip; and a thermal interface material (TIM), adhered the heat sink to the upper surface of the substrate and the back surface of the chip.