US 12,435,931 B2
Radiative heatsink
Jacob A. Balma, Lino Lakes, MN (US)
Assigned to Maxwell Labs Inc., Saint Paul, MN (US)
Filed by Maxwell Labs Inc., Saint Paul, MN (US)
Filed on Jan. 12, 2023, as Appl. No. 18/153,782.
Claims priority of provisional application 63/299,187, filed on Jan. 13, 2022.
Prior Publication US 2023/0221083 A1, Jul. 13, 2023
Int. Cl. F28F 3/04 (2006.01); F28F 13/18 (2006.01); F28F 21/04 (2006.01); H05K 7/20 (2006.01)
CPC F28F 3/04 (2013.01) [F28F 13/18 (2013.01); F28F 21/04 (2013.01); H05K 7/20409 (2013.01); H05K 7/20481 (2013.01); H05K 7/20709 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A radiative heatsink coupled to a heat source comprising:
a cold plate including a bulk material having a thermal reservoir;
a radiator mounted to the cold plate, wherein the radiator comprises:
a concave parabolic fin; and
a concentrator spaced apart or fitted directly to the concave top surface of the concave parabolic fin and includes a lower convex-shaped side and an opposing upper planar side, wherein the lower convex-shaped side of the concentrator provides a focal point for thermal radiation leaving the concave parabolic fin to be concentrated, or routed to the opposing upper planar side which provides a surface to collimate, focus and tune the concentrated thermal radiation away from the heat source and into an optical coupling; and
a thermal interface material located between and coupling the heat source to the cold plate, wherein the thermal interface material is configured to convert a portion of a first phononic thermal energy from the heat source into a first photonic near-field thermal radiation and a first photonic far-field thermal radiation and to transfer the first photonic near-field thermal radiation, the first photonic far-field thermal radiation and the remaining of the first phononic thermal energy from the heat source to the bulk material of the cold plate; and
wherein the bulk material of the cold plate is configured to combine the first photonic near-field thermal radiation, the first photonic far-field thermal radiation and the remaining first phononic thermal energy into a second phononic thermal energy and provide the second phononic thermal energy to the radiator; and
wherein the radiator is configured to convert the second phononic thermal energy into a second photonic near-field thermal radiation and a second photonic far-field thermal radiation and emit the second photonic near-field thermal radiation or the second photonic far-field thermal radiation such that the thermal reservoir of the bulk material is continuously regenerated.