Patent ID: 9721868
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A three dimensional integrated circuit (3DIC) comprising: a first substrate; a heat spreader embedded in the first substrate; a thermal interface material (TIM) over at least first surface of the heat spreader; a die electrically connected to the first substrate, wherein the die is thermally connected to the heat spreader via the TIM; a plurality of memory units on the die, wherein the die is between the plurality of memory units and the first substrate, and the plurality of memory units is thermally connected to the heat spreader by the die; and an external cooling unit on the plurality of memory units, wherein the plurality of memory units is between the die and the external cooling unit, the external cooling unit comprises a thermally conductive material, and the die is thermally connected to the external cooling unit by the plurality of memory units.