Heat spreaders for use with semiconductor devices
Memory devices having heat spreaders are disclosed herein. In one embodiment, a memory device includes first memories coupled to a front side of a substrate, second memories coupled to a back side of the substrate, and a flexible heat spreader. The flexible heat spreader can include graphite and is coupled to back side surfaces of the first and second memories to dissipate heat generated by the first and second memories.
1. A heat spreader for use with a dual in-line memory module (DIMM), the heat spreader comprising:
a graphite member; and
a plastic covering enveloping the graphite member,
wherein the heat spreader is configured to be coupled to at least one of
a plurality of first memories electrically coupled to and arranged in one or more rows at a front side of a substrate of the DIMM, and
a plurality of second memories electrically coupled to and arranged in one or more rows at a back side of the substrate of the DIMM, and
wherein the graphite member includes
a first opening configured to be generally positioned over a first circuit component attached to the front side of the substrate of the DIMM, wherein the first opening is configured to inhibit a thermal path through the graphite member between the first circuit component and the first memories, and
a second opening configured to be generally positioned over a second circuit component attached to the front side of the substrate of the DIMM, wherein the second opening is configured to inhibit a thermal path through the graphite member between the second circuit component and the first memories.
2. The heat spreader of claim 1 , wherein the first circuit component is a power management integrated circuit (PMIC).
3. The heat spreader of claim 1 , wherein the second circuit component is a registering clock driver (RCD).
4. The heat spreader of claim 1 , wherein:
the first circuit component is a PMIC,
the second circuit component is a RCD,
the first opening has a first cross-sectional dimension, and
the second opening has a second cross-sectional dimension, less than the first cross-sectional dimension.
5. The heat spreader of claim 1 wherein the plastic covering includes a thermoplastic material.
6. The heat spreader of claim 5 wherein the thermoplastic material is polyethylene terephthalate.
7. The heat spreader of claim 1 , wherein the first circuit component is a voltage regulator.
8. The heat spreader of claim 1 wherein the first opening has a generally rectangular shape having a length of about 15 mm and a width of about 10 mm.
9. The heat spreader of claim 1 wherein the heat spreader is flexible, and wherein the heat spreader is configured to be attached to both the first and second memories such that it curves around an edge of the substrate.
10. The heat spreader of claim 9 wherein the heat spreader has a first length along a first edge of between about 120-130 mm, and a second length along a second edge of between about 45-55 mm, wherein the first edge is generally perpendicular to the second edge.
11. The heat spreader of claim 1 wherein
the graphite member is of a first heat spreader portion,
the first heat spreader portion is configured to be attached to substantially an entire back side of each of the first memories,
the heat spreader further comprises a graphite member of a second heat spreader portion, and
the second heat spreader portion is configured to be attached to substantially an entire back side of each of the second memories.
12. The heat spreader of claim 11 wherein the first and second heat spreader portions each have a rectangular shape with a length of between about 120-130 mm and a width of between about 20-30 mm.