Three-dimensional integrated circuit structures providing thermoelectric cooling and methods for cooling such integrated circuit structures
View Patent ↗Three-dimensional integrated circuit structures providing thermoelectric cooling and methods for cooling such integrated circuit structures are disclosed. In one exemplary embodiment, a three-dimensional integrated circuit structure includes a plurality of integrated circuit chips stacked one on top of another to form a three-dimensional chip stack, a thermoelectric cooling daisy chain comprising a plurality of vias electrically connected in series with one another formed surrounding the three-dimensional chip stack, a thermoelectric cooling plate electrically connected in series with the thermoelectric cooling daisy chain, and a heat sink physically connected with the thermoelectric cooling plate.
1. A three-dimensional integrated circuit structure comprising:
a plurality of integrated circuit chips stacked one on top of another to form a three-dimensional chip stack, wherein each integrated circuit chip comprises an active area;
a thermoelectric cooling daisy chain comprising a plurality of vias electrically connected in series with one another formed surrounding, but not passing through, the active area of each integrated circuit chip of the three-dimensional chip stack, wherein each individual chain of the daisy chain penetrates through each integrated circuit chip of the three-dimensional chip stack;
a thermoelectric cooling plate electrically connected in series with the thermoelectric cooling daisy chain; and
a heat sink physically connected with the thermoelectric cooling plate.
2. The three-dimensional integrated circuit structure of claim 1 , wherein the three-dimensional chip stack comprises at least three integrated circuit chips.
3. The three-dimensional integrated circuit structure of claim 2 , wherein each chip of the plurality of integrated circuit chips comprises a plurality of transistors and/or resistors formed thereon.
4. The three-dimensional integrated circuit structure of claim 1 , wherein the thermoelectric cooling plate comprises a plurality of n-type semiconductive pellets and a plurality of p-type semiconductive pellets, and wherein each of the plurality of pellets is electrically connected in series with the thermoelectric cooling daisy chain.
5. The three-dimensional integrated circuit structure of claim 4 , wherein at least one n-type semiconductive pellet is electrically connected in series with at least one p-type semiconductive pellet via an electrically conductive bridging connection.
6. The three-dimensional integrated circuit structure of claim 4 , wherein the semiconductive pellets comprise bismuth telluride.
7. The three-dimensional integrated circuit structure of claim 4 , wherein the thermoelectric cooling daisy chain comprises at least two vias formed directly over, and electrically connected in series with, each semiconductive pellet of the plurality of n-type and p-type semiconductive pellet.
8. The three-dimensional integrated circuit structure of claim 7 , wherein, with respect to each semiconductive pellet, a first via of the at least two vias is formed within a first chip of the plurality of integrated circuit chips, and a second via of the at least two vias is formed within a second chip of the plurality of integrated circuit chips.
9. The three-dimensional integrated circuit structure of claim 8 , wherein the second via over an n-type pellet and the second via of a p-type pellet are electrically connected to one another in series via an electrically conductive bridging connection.
10. The three-dimensional integrated circuit structure of claim 1 , wherein the plurality of vias of the daisy chain are formed surrounding, but not within, an active area of the three-dimensional integrated circuit chip stack.
11. The three-dimensional integrated circuit structure of claim 1 , wherein the plurality of vias of the daisy chain do not form any logical connections of the three-dimensional integrated circuit structure such that the plurality of vias are provided solely for heat dissipation purposes.
12. The three-dimensional integrated circuit structure of claim 1 , wherein the thermoelectric cooling plate comprises a connection plate that physically connects the thermoelectric cooling plate to the heat sink.
13. The three-dimensional integrated circuit structure of claim 12 , wherein the connection plate comprises an electrically insulative but thermally conductive material.
14. The three-dimensional integrated circuit structure of claim 13 , wherein the heat sink comprises a plurality of fins for convectional dissipation of heat.
15. The three-dimensional integrated circuit structure of claim 14 , wherein the heat sink comprises a thermally conductive material.
16. The three-dimensional integrated circuit structure of claim 1 , wherein the thermoelectric cooling daisy chain is provide in a rectangular configuration that surrounds a rectangular three-dimensional integrated circuit chip stack.