Heatsink mounting system to maintain a relatively uniform amount of pressure on components of a circuit board
View Patent ↗In some examples, a computing device may include a heatsink, a thermal spreader, a first thermal pad located between the heatsink and the thermal spreader, a circuit board comprising a plurality of components, and a second thermal pad located between the thermal spreader and the circuit board. A plurality of standoffs may be located between the heatsink and the circuit board. Each standoff of the plurality of standoffs may pass through a corresponding spring of a plurality of springs and pass through a corresponding mounting hole of a plurality of mounting holes in the thermal spreader. Each screw of a plurality of screws may engage with a corresponding standoff of the plurality of standoffs. The plurality of springs may cause the thermal spreader and the second thermal pad to a relatively uniform amount of pressure to each component of the plurality of components.
1. A computing device comprising: a heatsink; a thermal spreader that includes a plurality of mounting holes; a first thermal pad located between the heatsink and the thermal spreader; a circuit board comprising a plurality of components; a second thermal pad located between the thermal spreader and the circuit board; a plurality of standoffs located between the heatsink and the circuit board; a plurality of springs, wherein each standoff of the plurality of standoffs: passes through a corresponding spring of the plurality of springs; and passes through a corresponding mounting hole of the plurality of mounting holes in the thermal spreader; and a plurality of screws, wherein each screw of the plurality of screws engages with a corresponding standoff of the plurality of standoffs; wherein the plurality of springs cause the thermal spreader and the second thermal pad to apply a predetermined amount of pressure to each of the plurality of components.
2. The computing device of claim 1 , wherein the second thermal pad is in contact with an upper surface of individual components of the plurality of components.
3. The computing device of claim 1 , wherein the predetermined amount of pressure is less than a maximum amount of pressure that individual components of the plurality of components are designed to withstand.
4. The computing device of claim 1 , wherein the plurality of components comprise a central processing unit (CPU) and at least one of:
a graphics processing unit (GPU);
a CPU chip set;
a voltage regulator;
a wireless communication card;
a hard disk drive;
a solid disk drive (SSD); or
random access memory (RAM).
5. The computing device of claim 1 , wherein the second thermal pad comprises:
a silicone or polysynthetic oil base; and
at least one of ceramic particles, silver particles, zinc oxide particles, aluminum oxide particles, boron nitride particles, or aluminum particles.
6. The computing device of claim 1 , wherein:
a corresponding locking ring is used to secure each standoff of the plurality of standoffs to the thermal spreader.
7. The computing device of claim 1 , wherein:
the standoffs are integrated into the heatsink; or
the standoffs are fastened to the heatsink.
8. A computing device comprising: a circuit board; a plurality of heat-generating components mounted on the circuit board; a thermal spreader having a first thermal pad above the thermal spreader and a second thermal pad below the thermal spreader; a plurality of standoffs; a heatsink placed on top of the plurality of standoffs, wherein: the heatsink is attached to the circuit board using a plurality of screws that engage with the standoffs; and the first thermal pad is located below the heatsink; and a plurality of springs, wherein individual standoffs of the plurality of standoffs pass through individual springs of the plurality of springs, wherein the springs cause the second thermal pad to apply an amount of pressure that is within a predetermined range to each of the heat-generating components.
9. The computing device of claim 8 , wherein the plurality of heat-generating components comprise a central processing unit (CPU) and at least one of:
a graphics processing unit (GPU);
a CPU chip set;
a voltage regulator;
a wireless communication card;
a hard disk drive;
a solid disk drive (SSD); or
random access memory (RAM).
10. The computing device of claim 8 , wherein:
a top surface of the first thermal pad is in contact with a bottom surface of the heatsink; and
a bottom surface of the first thermal pad is in contact with a top surface of the thermal spreader.
11. The computing device of claim 8 , wherein:
a top surface of the second thermal pad is in contact with a bottom surface of the thermal spreader; and
a bottom surface of the second thermal pad is in contact with a top surface of the heat-generating components.
12. The computing device of claim 8 , wherein:
the thermal spreader comprises a copper alloy.
13. The computing device of claim 8 , wherein the second thermal pad comprises at least one of:
a thermal grease, a thermal gel, a thermal pad, or an epoxy.
14. A computing device comprising: a heatsink; a thermal spreader comprised of copper that includes a plurality of mounting holes; a first thermal pad located between the heatsink and the thermal spreader; a circuit board comprising a plurality of heat-generating components; a second thermal pad located between the thermal spreader and the circuit board; a plurality of standoffs located between the heatsink and the circuit board; a plurality of springs, wherein each standoff of the plurality of standoffs: passes through a corresponding spring of the plurality of springs; and passes through a corresponding mounting hole of the plurality of mounting holes in the thermal spreader; and a plurality of screws, wherein each screw of the plurality of screws engages with a corresponding standoff of the plurality of standoffs; wherein the plurality of springs cause the thermal spreader and the second thermal pad to apply an amount of pressure to each of the plurality of heat-generating components that is within a predetermined range.
15. The computing device of claim 14 , wherein:
the heatsink is part of an enclosure for the computing device.
16. The computing device of claim 14 , further comprising:
a backplate having a plurality of holes, wherein each screw of the plurality of screws passes through a corresponding hole of the plurality of holes.
17. The computing device of claim 14 , wherein:
the amount of pressure applied to the plurality of heat-generating components is sufficient to enable the second thermal pad to make contact with a predetermined percentage of an external surface of individual heat-generating components of the plurality of heat-generating components.
18. The computing device of claim 14 , wherein the plurality of heat-generating components comprise a central processing unit (CPU).
19. The computing device of claim 18 , wherein the plurality of heat-generating components further comprise at least one of:
a graphics processing unit (GPU);
a CPU chip set;
a voltage regulator;
a wireless communication card;
a hard disk drive;
a solid disk drive (SSD); or
random access memory (RAM).
20. The computing device of claim 14 , wherein the second thermal pad comprises:
a silicone or polysynthetic oil base; and
at least one of ceramic particles, silver particles, zinc oxide particles, aluminum oxide particles, boron nitride particles, or aluminum particles.