# US 2021/0345519 A1 · Technologies for reconfigurable heat sinks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345519 A1 - Document ID: US20210345519A1 - Status: Published application - Kind: A1 - Application number: 17/359,405 - Filed: 2021-06-25 - Published: 2021-11-04 - Earliest claimed: 2020-06-29 - Assignees: Intel Corporation - Applicants: Intel Corporation - Inventors: Wenbin Tian; Yingqiong Bu; Yanbing Sun; Yang Yao; Yuehong Fan; Ming Zhang; Casey Robert Winkel; Jin Yang; David Shia; Mohanraj Prabhugoud - Web page: https://patentgrep.com/patent/US20210345519A1 ## CPC - H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)} - H05K 7/20809: {within server blades for removing heat from heat source} - H05K 7/20127: {Natural convection} - H05K 7/20336: {Heat pipes, e.g. wicks or capillary pumps} - H05K 7/20727: {within server blades for removing heat from heat source} - H10W 40/10: Arrangements for heating - H10W 40/226: {characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461)} - H10W 40/60: Securing means for detachable heating or cooling arrangements, e.g. clamps - H10W 40/611: {Bolts or screws} - H10W 40/73: for cooling by change of state - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract Techniques for reconfigurable heat sinks are disclosed. In one embodiment, a compute system includes a heat sink includes a core fin assembly with two removable lateral fin assemblies. The lateral fin assemblies may be above one or more components of the compute system, such as one or more memory modules. With the lateral fin assemblies in place, the cooling capacity of the heat sink is increased, but the more memory modules may be difficult or impossible to service. With the lateral fin assemblies removed, the memory modules can be serviced (e.g., replaced). In another embodiment, a lateral fin assembly of a heat sink is attached to a heat pipe. The lateral fin assembly can rotate relative to the heat pipe, allowing the lateral fin assembly to fit within a 2U form factor in one configuration and allow access to components under the lateral fin assembly in another configuration. ## Claims ### Claim 1 A heat sink comprising: a base to thermally couple to an integrated circuit component; a core fin assembly comprising a first plurality of fins, wherein individual fins of the first plurality of fins are thermally coupled to the base and fixed in position relative to the base; and a lateral fin assembly comprising a second plurality of fins, wherein individual fins of the second plurality of fins are thermally coupled to the base, wherein the lateral fin assembly is movable relative to the base. ### Claim 2 (depends on 1) The heat sink of claim 1, wherein the second plurality of fins are mechanically mated to a heat pipe thermally coupled to the base, wherein the second plurality of fins are rotatable relative to the heat pipe. ### Claim 3 (depends on 2) The heat sink of claim 2, further comprising one or more O-rings, wherein the one or more O-rings retain the second plurality of fins on the heat pipe. ### Claim 4 (depends on 2) The heat sink of claim 2, wherein the second plurality of fins are able to rotate at least 90° relative to the heat pipe. ### Claim 5 (depends on 2) The heat sink of claim 2, wherein the second plurality of fins are able to rotate at least 180° relative to the heat pipe. ### Claim 6 (depends on 2) The heat sink of claim 2, further comprising a thermal interface material between the second plurality of fins and the heat pipe. ### Claim 7 (depends on 1) The heat sink of claim 1, further comprising a first thermally conductive block thermally coupled to the base, wherein the lateral fin assembly comprises a second thermally conductive block, wherein the second plurality of fins are mechanically mated to the second thermally conductive block, wherein the second thermally conductive block is removably fastened to the first thermally conductive block. ### Claim 8 (depends on 7) The heat sink of claim 7, wherein the second thermally conductive block has a flat surface that mates with a flat surface of the first thermally conductive block, wherein the second thermally conductive block has an edge, wherein the edge has a wedged shape, wherein the wedged-shaped edge of the second thermally conductive block mates with a protrusion extending from the flat surface of the first thermally conductive block, further comprising a spring to apply a force to the second thermally conductive block in a direction in a plane defined by the flat surface of the second thermally conductive block, wherein the spring applies a force through the second thermally conductive block to the wedge-shaped edge toward the protrusion extending from the flat surface of the first thermally conductive block, wherein the protrusion extending from the flat surface of the first thermally conductive block applies a force normal to a surface of the wedge-shaped edge, wherein the force normal to the surface of the wedge-shaped edge is at least partially a force perpendicular to the flat surface of the first thermally conductive block. ### Claim 9 (depends on 7) The heat sink of claim 7, further comprising: a second lateral fin assembly comprising a third plurality of fins, wherein individual fins of the third plurality of fins are thermally coupled to the base, wherein the third plurality of fins is movable relative to the base; and a third thermally conductive block thermally coupled to the base; wherein the second lateral fin assembly comprises a fourth thermally conductive block, wherein the third plurality of fins are mechanically mated to the fourth thermally conductive block, wherein the fourth thermally conductive block is removably fastened to the third thermally conductive block, further comprising a spring mechanically coupled to the lateral fin assembly and the second lateral fin assembly, wherein the spring applies a force to the lateral fin assembly towards the second lateral fin assembly and applies a force to the second lateral fin assembly towards the first lateral fin assembly. ### Claim 10 (depends on 7) The heat sink of claim 7, further comprising a thermal interface material between the first thermally conductive block and the second thermally conductive block. ### Claim 11 (depends on 1) A system comprising the heat sink of claim 1, the system further comprising: the integrated circuit component thermally coupled to the heat sink; a mainboard, the integrated circuit component mated with the mainboard; and one or more memory modules mechanically coupled to the mainboard and communicatively coupled to the integrated circuit component, wherein the lateral fin assembly is positioned above one of the one or more memory modules. ### Claim 12 A method comprising: moving a first plurality of fins of a heat sink from a first position to a second position relative to a base of the heat sink, wherein the base is thermally coupled to an integrated circuit component, wherein the integrated circuit component is mated with a mainboard, wherein the heat sink comprises a second plurality of fins, wherein individual fins of the first plurality of fins are thermally coupled to the base, wherein individual fins of the second plurality of fins are thermally coupled to the base, wherein the second plurality of fins are fixed in position relative to the base, removing one or more memory modules from the one or more memory module slots of the mainboard while the plurality of fins are in the second position; adding one or more new memory modules to the one or more memory module slots while the first plurality of fins are in the second position; and moving the first plurality of fins of the heat sink from the second position to the first position after adding the one or more new memory modules, wherein the first plurality of fins prevents removal of the one or more memory modules from the one or more memory module slots in the first position, wherein the first plurality of fins does not prevent removal of the one or more memory modules from the one or more memory module slots in the second position. ### Claim 13 (depends on 12) The method of claim 12, wherein the first plurality of fins are mechanically mated to a heat pipe thermally coupled to the base, wherein moving the first plurality of fins from the first position to the second position comprises rotating the first plurality of fins relative to the heat pipe. ### Claim 14 (depends on 13) The method of claim 13, wherein one or more O-rings retain the first plurality of fins on the heat pipe. ### Claim 15 (depends on 13) The method of claim 13, wherein the first plurality of fins are able to rotate at least 90° relative to the heat pipe. ### Claim 16 (depends on 13) The method of claim 13, wherein the first plurality of fins are able to rotate at least 180° relative to the heat pipe. ### Claim 17 (depends on 13) The method of claim 13, wherein a thermal interface material is between the first plurality of fins and the heat pipe. ### Claim 18 (depends on 12) The method of claim 12, wherein a first thermally conductive block is thermally coupled to the base, wherein the first plurality of fins are mechanically mated to a second thermally conductive block, wherein the second thermally conductive block is removably fastened to the first thermally conductive block, wherein moving the first plurality of fins from the first position to the second position comprises removing the second thermally conductive block from the first thermally conductive block. ### Claim 19 (depends on 18) The method of claim 18, wherein the second thermally conductive block has a flat surface that mates with a flat surface of the first thermally conductive block, wherein the second thermally conductive block has an edge, wherein the edge has a wedged shape, wherein the wedged-shaped edge of the second thermally conductive block mates with a protrusion extending from the flat surface of the first thermally conductive block, wherein moving the first plurality of fins of the heat sink from the second position to the first position comprises fastening a spring to the second thermally conductive block to apply a force to the second thermally conductive block in a direction in a plane defined by the flat surface of the second thermally conductive block, wherein the spring applies a force through the second thermally conductive block to the wedge-shaped edge toward the protrusion extending from the flat surface of the first thermally conductive block, wherein the protrusion extending from the flat surface of the first thermally conductive block applies a force normal to a surface of the wedge-shaped edge, wherein the force normal to the surface of the wedge-shaped edge is at least partially a force perpendicular to the flat surface of the first thermally conductive block. ### Claim 20 (depends on 18) The method of claim 18, wherein the heat sink comprises a third plurality of fins, wherein individual fins of the third plurality of fins are thermally coupled to the base, wherein the third plurality of fins is movable relative to the base, wherein the heat sink comprises a third thermally conductive block thermally coupled to the base; wherein the heat sink comprises a fourth thermally conductive block, wherein the third plurality of fins are mechanically mated to the fourth thermally conductive block, wherein the fourth thermally conductive block is removably fastened to the third thermally conductive block, wherein the heat sink comprises a spring mechanically coupled to the second thermally conductive block and the fourth thermally conductive block, wherein the spring applies a force to the second thermally conductive block towards the fourth thermally conductive block and applies a force to the fourth thermally conductive block towards the second thermally conductive block, wherein moving the first plurality of fins of the heat sink from the first position to the second position comprises pulling the second thermally conductive block away from the fourth thermally conductive block. ### Claim 21 (depends on 18) The method of claim 18, wherein the heat sink comprises a thermal interface material between the first thermally conductive block and the second thermally conductive block. ### Claim 22 A heat sink comprising: a first means for cooling an integrated circuit component, the first means thermally coupled to the integrated circuit component mated with the integrated circuit component; and a second means for cooling the integrated circuit component, the second means thermally and mechanically coupled to the first means, wherein the second means is movable relative to the first means. ### Claim 23 (depends on 22) The heat sink of claim 22, wherein the second means is rotatable relative to the first means. ### Claim 24 (depends on 22) The heat sink of claim 22, wherein the second means is removable from the first means.