Heatspreader for single-device and multi-device modules
View Patent ↗A heatsink includes a heatsink base, an elastomeric base, multiple slider pins and an alignment frame coupled to the heatsink base. The elastomeric base includes multiple holes, the elastomeric base coupled to the perimeter of the heatsink base. Each of the slider pins secured in one of the holes in the elastomeric base. The alignment frame supporting and aligning the slider pins as the slider pins move in a direction substantially perpendicular to the heatsink base. A method of assembling a heat spreader is also described.
1. A heatsink comprising:
a heatsink base;
an elastomeric base including a plurality of holes, the elastomeric base coupled to the perimeter of the heatsink base;
a plurality of slider pins, each of the slider pins secured in one of the plurality of holes in the elastomeric base;
an alignment frame coupled to the heatsink base, the alignment frame supporting and aligning the plurality of slider pins as the slider pins move in a direction substantially perpendicular to the heatsink base and;
at least one cushion spring between the elastomeric base and the alignment frame, the at least one cushion spring located proximate to a perimeter of the plurality of slider pins.
2. The heatsink of claim 1 , further comprising a captivated heat transfer material contained in a cavity between the elastomeric base and the heatsink base.
3. The heatsink of claim 2 , wherein the captivated heat transfer material is a fluid.
4. The heatsink of claim 2 , wherein the captivated heat transfer material is a gas.
5. The heatsink of claim 2 , wherein the captivated heat transfer material is a liquid metal.
6. The heatsink of claim 2 , further comprising:
an inlet coupled to the cavity between the elastomeric base and the heatsink base; and
an outlet coupled to the cavity between the elastomeric base and the heatsink base, wherein the captivated heat transfer material is flowed into, through and out of the cavity between the elastomeric base and the heatsink base.
7. The heatsink of claim 1 , wherein the plurality of slider pins are arranged in an array, the array being a shape similar to a heat source.
8. The heatsink of claim 1 , wherein the heatsink is coupled to a substrate and wherein the substrate includes:
a heat source mounted on the substrate; and
a quantity of thermal interface material between the heat source and the plurality of slider pins, the plurality of slider pins compressing the thermal interface material to a desired bondline thickness.
9. The heatsink of claim 8 , wherein the heat source includes a semiconductor device.
10. The heatsink of claim 9 , wherein the heat source includes a lid on the semiconductor device.
11. The heatsink of claim 1 , wherein the alignment frame includes a plurality of alignment frames and wherein the plurality of slider pins are divided into a plurality of arrays of slider pins, each one of the plurality of alignment frames supporting and aligning a corresponding one of the plurality of arrays of slider pins.
12. A heatsink comprising:
a heatsink base;
an elastomeric base including a plurality of holes, the elastomeric base coupled to the perimeter of the heatsink base;
a plurality of slider pins, each of the slider pins secured in one of the plurality of holes in the elastomeric base;
an alignment frame coupled to the heatsink base, the alignment frame supporting and aligning the plurality of slider pins as the slider pins move in a direction substantially perpendicular to the heatsink base;
at least one cushion spring between the elastomeric base and the alignment frame, the at least one cushion spring located proximate to a perimeter of the plurality of slider pins; and
a captivated heat transfer material contained in a cavity between the elastomeric base and the heatsink base;
wherein the heatsink is coupled to a substrate and wherein the substrate includes:
a heat source mounted on the substrate; and
a quantity of thermal interface material between the heat source and the plurality of slider pins, the plurality of slider pins compressing the thermal interface material to a desired bondline thickness.
13. A method of assembling a heat spreader comprising:
dispensing a desired quantity of thermal interface material to a heat source mounted on a substrate;
positioning the heat spreader in a desired position, wherein the heat spreader includes:
a heatsink base;
an elastomeric base including a plurality of holes, the elastomeric base coupled to the perimeter of the heatsink base;
a plurality of slider pins, each of the slider pins secured in one of the plurality of holes in the elastomeric base;
an alignment frame coupled to the heatsink base, the alignment frame supporting and aligning the plurality of slider pins as the slider pins move in a direction substantially perpendicular to the heatsink base wherein the desired position aligns the plurality of slider pins with a heat source; and
at least one cushion spring between the elastomeric base and the alignment frame, the at least one cushion spring located proximate to a perimeter of the plurality of slider pins; and
applying a compression load to the heat spreader to compress the heat spreader to the substrate until the thermal interface material has a desired bondline thickness.
14. The method of claim 13 , further comprising securing the heat spreader to the substrate.
15. The method of claim 13 , wherein the heat spreader further includes a captivated heat transfer material contained in a cavity between the elastomeric base and the heatsink base.
16. The method of claim 15 , wherein the heat spreader further includes:
an inlet coupled to the cavity between the elastomeric base and the heatsink base; and
an outlet coupled to the cavity between the elastomeric base and the heatsink base.
17. The method of claim 16 , further comprising flowing the captivated heat transfer material into, through and out of the cavity between the elastomeric base and the heatsink base.