Modular heat sink assembly comprising a larger main heat sink member thermally connected to smaller additional floating heat sink members
A modular heat sink assembly is disclosed. The heat sink assembly includes a main (larger) heat sink member having one or more voids through the member. The heat sink assembly also includes one or more additional (smaller) heat sink members that fit within the voids of the main heat sink member and are able to move (float) within the voids while thermally connected to main heat sink member. The thermal connection to the main heat sink member may be accomplished by incorporating heat pipes as a bridge between the heat sink members, so that heat spreading, and regulation thereof, occurs over the additional heat sink members and the main heat sink member.
1. A heat sink assembly, comprising:
a main heat sink member adapted to thermally couple with at least one component on a circuit board, the main heat sink member comprising at least one void; and
at least one additional heat sink member adapted to fit within the at least one void, adapted to move within the void, and adapted to thermally couple with another component on the circuit board;
wherein the at least one additional heat sink member is thermally connected to the main heat sink member.
2. The heat sink assembly of claim 1 further comprising:
at least one heat pipe connected between the main heat sink member and the at least one additional heat sink member, wherein the heat pipe is aligned to facilitate heat transfer between the main heat sink member and the additional heat sink member.
3. The heat sink assembly of claim 1 wherein the at least one additional heat sink member is coupled to the main heat sink member through at least one connecting member that applies a spring force on the at least one additional heat sink member.
4. The heat sink assembly of claim 3 wherein the amount of spring force applied by the at least one connecting member is adjustable.
5. The heat sink assembly of claim 1 wherein the main heat sink member includes a base with:
a plurality of fins on a first side; and
at least one pad formed from a Thermal Interface Material (TIM) on a second side that is adapted to interface with the at least one component on a circuit board.
6. The heat sink assembly of claim 5 wherein the at least one additional heat sink member includes a base with:
a plurality of fins on a first side; and
a surface on a second side that thermally contacts the another component on the circuit board.
7. The heat sink assembly of claim 6 wherein the surface of the at least one additional heat sink member interfaces with the at least one other component on the circuit board through a thermally conductive grease.
8. A heat sink assembly adapted to connect to a circuit board having a plurality of components mounted on the circuit board, the heat sink assembly comprising:
a main heat sink member adapted to thermally couple with at least one component on the circuit board, the main heat sink member comprising at least one void;
at least one additional heat sink member assembled within the at least one void, movably coupled to the main heat sink member through at least one connecting member that applies a force on the at least one additional heat sink member toward the circuit board, and adapted to thermally couple with another component on the circuit board; and
at least one heat pipe connected between the main heat sink member and the at least one additional heat sink member.
9. The heat sink assembly of claim 8 wherein the amount of force applied by the at least one connecting member is adjustable.
10. The heat sink assembly of claim 9 wherein the at least one connecting member comprises:
a screw adapted to pass through a hole in the at least one additional heat sink member and connect with the main heat sink member; and
a spring connected between the head of the screw and the at least one additional heat sink member.
11. The heat sink assembly of claim 8 wherein the main heat sink member includes a base with:
a plurality of fins on a first side; and
at least one pad formed from a Thermal Interface Material (TIM) on a second side that is adapted to interface with the at least one component on the circuit board.
12. The heat sink assembly of claim 11 wherein the at least one additional heat sink member includes a base with:
a plurality of fins on a first side; and
a surface on a second side that thermally contacts the another component on the circuit board.
13. The heat sink assembly of claim 12 wherein the surface of the at least one additional heat sink member thermally contacts the other component on the circuit board through a thermally conductive grease.
14. The heat sink assembly of claim 12 wherein:
the main heat sink assembly thermally contacts an at least one component on the circuit board having a lower thermal energy through the TIM; and
the at least one additional heat sink assembly thermally contacts the other component on the circuit board having a higher thermal energy through the thermally conductive grease.
15. The heat sink assembly of claim 12 wherein:
the main heat sink assembly thermally contacts an at least one component on the circuit board having a first height through the TIM; and
the at least one additional heat sink assembly thermally contacts the other component on the circuit board having a second height through the thermally conductive grease.
16. A heat sink assembly adapted to connect to a circuit board having a plurality of components mounted on the circuit board, the heat sink assembly comprising:
a main heat sink member having a plurality of fins on a first side, and at least one pad formed from a Thermal Interface Material (TIM) on a second side that is adapted to interface with at least one of the components on the circuit board, wherein the main heat sink assembly includes at least one void within the outer boundary of the main heat sink member;
at least one additional heat sink member having a plurality of fins on a first side, and a surface on a second side that is adapted to interface with another component on the circuit board, the at least one additional heat sink member is movably coupled to the main heat sink member so that the at least one additional heat sink member floats within the at least one void; and
at least one heat pipe connected between the main heat sink member and the at least one additional heat sink member.
17. The heat sink assembly of claim 16 wherein the at least one additional heat sink member is movably coupled to the main heat sink member through at least one connecting member that applies a force on the at least one additional heat sink member toward the circuit board.
18. The heat sink assembly of claim 17 wherein the amount of force applied by the at least one connecting member is adjustable.
19. The heat sink assembly of claim 18 wherein the at least one connecting member comprises:
a screw adapted to pass through a hole in the at least one additional heat sink member and connect with the main heat sink member; and
a spring connected between the head of the screw and the at least one additional heat sink member.
20. The heat sink assembly of claim 16 wherein the surface of the at least one additional heat sink member thermally contacts the other component on the circuit board through a thermally conductive grease.