Heat dissipation solution for advanced chip packages
A solution for dissipating heat generated from high power chip packages, e.g., a fcBGA package, wbBGA package, 2.5D/3D TSV package, PoP, etc. The heat dissipation system may include a high power chip package including a high power chip. A micro-jet may be attached to the high power chip. A micro-pump may be in fluidic communication with the micro-jet. A heat exchanger may be in fluidic communication with the micro-pump. The high power chip package is assembled on the same PCB with the micro-pump and the heat exchanger.
1. A heat dissipation system for a high power chip package, comprising:
a high power chip having a heat flux of over 350 W/cm 2 or having hot spots of more than 10 kW/cm 2 ;
a built-in micro-jet disposed in the high power chip package and attached to the high power chip, the built-in micro-jet having a micro-jet chamber defined by a top wall, a bottom wall, and at least one sidewall, and a separator disposed in a middle of the micro-jet chamber dividing the micro-jet chamber into an upper chamber and a lower chamber, the bottom wall of the built-in micro-jet is attached to a surface of the high power chip by one selected from a group of a direct attachment of the bottom wall of the built-in micro-jet to the surface of the high power chip and a die attach material disposed between the high power chip and the bottom wall of the built-in micro-jet;
a plurality of via holes disposed in the separator, wherein the plurality of via holes is arranged in an array;
a mold compound encapsulating the high power chip and contacting at least a portion of the built-in micro-jet;
a pump in fluidic communication with the built-in micro-jet;
a heat exchanger in fluidic communication with the pump; and
a coolant flowing through the built-in micro-jet, the pump, and the heat exchanger.
2. The heat dissipation system of claim 1 , wherein the high power chip package is selected from a group consisting of a fcBGA package, a wbBGA package, a 2.5D/3D TSV package, and a PoP.
3. The heat dissipation system of claim 1 , further comprising an inlet of the micro-jet chamber and an outlet of the micro jet chamber.
4. The heat dissipation system of claim 3 , wherein the coolant flows from the pump through the inlet of the micro-jet chamber into the upper chamber of the micro-jet chamber.
5. The heat dissipation system of claim 3 , wherein the coolant flows from the lower chamber of the micro-jet chamber through the outlet of the micro-jet chamber to the heat exchanger.
6. The heat dissipation system of claim 1 , wherein the high power chip package, the pump, and the heat exchanger are disposed on a single PCB.
7. The heat dissipation system of claim 1 , wherein the mold compound encapsulates the built-in micro-jet.
8. The heat dissipation system of claim 1 , wherein at least a portion of a surface of the built-in micro-jet is exposed by the mold compound.
9. The heat dissipation system of claim 1 , wherein the high power chip is disposed on an organic substrate of the high power chip package.
10. The heat dissipation system of claim 1 , wherein the coolant absorbs heat generated by the high power chip through one selected from the group of the direct attachment bottom wall of the micro-jet chamber to the surface of the high power chip and the die attach material disposed between the high power chip and the bottom wall of the built-in micro-jet.
11. The heat dissipation system of claim 1 , wherein the plurality of via holes disposed in the separator of the micro-jet chamber are configured to distribute the coolant evenly on the portion of the micro-jet chamber contacting the surface of the high power chip.
12. The heat dissipation system of claim 1 , wherein the array of via holes is selected from a group of an 8×8 array, a 10×10 array, and a 20×20 array.
13. The heat dissipation system of claim 1 , wherein the plurality of via holes are cylindrical, and wherein a diameter of each of the plurality of via holes is 50 micrometers.
14. The heat dissipation system of claim 1 , wherein the separator is copper.