Electrical assemblage and method for removing heat locally generated therefrom
View Patent ↗A densely packed electronic assemblage has a substrate media for supporting at least one heat generating component and means for reducing the temperature of the at least one heat generating component. A heat sink cooperates with the heat removing element for reducing heat of the at least one heat generating component by absorbing heat from the at least one heat generating component.
1. A densely packed electrical assemblage, comprising:
a substrate media comprising a topmost surface, said substrate media supporting at least one heat generating component generating heat thereon, said at least one heat generating component having a junction temperature T j ;
a first thermally conductive adhesive in contact with the heat generating component, the thermally conductive adhesive conveying the heat from the heat generating component;
a heat removing element in contact with said first thermally conductive adhesive and deployed within said substrate, said heat removing element comprising at least one via extending from the topmost surface of the substrate media, the heat removing element thermally juxtaposed to said at least one heat generating component and removing the heat loads therefrom through said at least one via;
a second thermally conductive adhesive in contact with the heat removing element and conveying the heat removed through said at least one via; and,
a heat sink in contact with the second thermally conductive adhesive, the heat sink absorbing the heat conveyed through the second thermally conductive adhesive from said at least one heat generating component and thereby reducing said junction temperature T j of said at least one heat generating component to a temperature T 1 , wherein T 1 is less than T j .
2. The densely packed electrical assemblage recited in claim 1 , wherein said at least one via comprises a plurality of spaced thermal vias.
3. The densely packed electrical assemblage recited in claim 2 , wherein said plurality of spaced thermal vias are regularly spaced in said substrate media.
4. The densely packed electrical assemblage recited in claim 2 wherein said plurality of spaced thermal vias are generally round and have a diameter of about 0.022 inches.
5. The densely packed electrical assemblage recited in claim 2 , wherein each one of said plurality of spaced thermal vias are spaced about 0.040 inches apart.
6. The densely packed electrical assemblage recited in claim 2 , wherein said plurality of spaced thermal vias is filled with a thermally conductive material.
7. The densely packed electrical assemblage recited in claim 6 wherein said thermally conductive material comprises a material selected from the group consisting of: tin-lead solder; silver solder;
thermally conductive liquid silicone adhesive; thermally conductive liquid epoxy adhesive; and a mixture thereof.
8. The densely packed electrical assemblage recited in claim 1 wherein said first thermally conductive adhesive envelops an open space between said at least one heat generating component and said heat removing element on said substrate media thermally connecting said at least one heat generating component and said heat removing element.
9. The densely packed electrical assemblage recited in claim 8 wherein said first thermally conductive adhesive comprises a thermally conductive liquid silicone adhesive.
10. The densely packed electrical assemblage recited in claim 8 wherein said first thermally conductive adhesive comprises a thermally conductive liquid epoxy.
11. The densely packed electrical assemblage recited in claim 8 wherein said first thermally conductive adhesive comprises a thermally conductive silicone film.
12. The densely packed electrical assemblage recited in claim 8 wherein said first thermally conductive adhesive comprises a thermally conductive epoxy film.
13. The densely packed electrical assemblage recited in claim 1 wherein said substrate media comprises polyimide material layers.
14. The densely packed electrical assemblage recited in claim 1 wherein said substrate media comprises ceramic material layers.
15. The densely packed electrical assemblage recited in claim 1 wherein said substrate media comprises resin-based material layers.
16. The densely packed electrical assemblage recited in claim 13 wherein a nickel gold plating is coated on said polyimide material layers for forming said heat removing element.
17. The densely packed electrical assemblage recited in claim 13 wherein an immersion tin is coated on said polyimide material layers for forming said heat removing element.
18. The densely packed electrical assemblage recited in claim 13 wherein an immersion silver is coated on said polyimide material layers for forming said heat removing element.
19. The densely packed electrical assemblage recited in claim 13 wherein palladium is coated on said polyimide material layers for forming said heat removing element.
20. The densely packed electrical assemblage recited in claim 13 wherein a hot air solder level is coated on said polyimide material layers for forming said heat removing element.