Systems and methods for coupling a metal core PCB to a heat sink

Patent metadata

Field	Value
Publication number	US-11333341-B2
Application number	US-202017096165-A
Country	US
Kind code	B2
Filing date	Nov 12, 2020
Priority date	May 3, 2017
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

Embodiments may utilize a series of exposed fins, which increase the surface area of the heat sink creating additional air flow. As hotter air rises within the system, cooler is drawn into the heatsink. The fins may be exposed on both sides of the longitudinal axis, allowing cooler air to be drawn towards the longitudinal axis above the heatsink and flow upward. This process may cool the fins. Additionally, the spacing between the fins may have to be wide enough to allow for air to freely enter the heatsink.

First claim

We claim:

1. A heat sink, comprising:
a rib extending along a central longitudinal axis of the heat sink, the rib having a first height;
a plurality of fins extending from each side of the rib, wherein:
each of the plurality of fins comprises a first section proximate to the rib and an overhang section distal from the rib;
the first section has the first height; and
the overhang section has a second height longer than the first height; and

a base coupled to the rib, wherein the base is positioned between the overhang section of the plurality of fins on a first side of the rib and the overhang section of the plurality of fins on a second side of the rib.

2. The heat sink of claim 1 , wherein the base comprises a plurality of orifices configured to let heat flow through the base into the plurality of fins.

3. The heat sink of claim 2 , wherein the plurality of orifices are located on either side of the central longitudinal axis of the heat sink.

4. The heat sink of claim 2 , wherein the plurality of orifices are distributed symmetrically around the central longitudinal axis of the heat sink.

5. The heat sink of claim 2 , wherein the plurality of orifices are distributed asymmetrically around the central longitudinal axis of the heat sink.

6. The heat sink of claim 1 , wherein the base is planar.

7. The heat sink of claim 1 , wherein the base comprises a metal core printed circuit board.

8. The heat sink of claim 1 , wherein a lower surface of the plurality of fins is adjacent to an upper surface of the base.

9. The heat sink of claim 1 , wherein the rib and the plurality of fins are formed from a unitary block of metal.

10. A light fixture, comprising:
the heat sink of claim 1 ; and
a plurality of light sources on the base of the heat sink.

11. A method for a heat sink, comprising:
forming a rib extending along a central longitudinal axis of the heat sink, the rib having a first height;
forming a plurality of fins extending from each side of the rib, wherein:
each of the plurality of fins comprises a first section proximate to the rib and an overhang section distal from the rib;
the first section has the first height; and
the overhang section has a second height longer than the first height; and

coupling a base to a lower surface of the plurality of fins, wherein the base is positioned between the overhang section of the plurality of fins on a first side of the rib and the overhang section of the plurality of fins on a second side of the rib.

12. The method of claim 11 , further comprising:
forming a plurality of orifices extending through the base, the plurality of orifices configured to let heat flow through the base into the plurality of fins.

13. The method of claim 12 , wherein the plurality of orifices are located on either side of the central longitudinal axis of the heat sink.

14. The method of claim 12 , wherein the plurality of orifices are distributed symmetrically around the central longitudinal axis of the heat sink.

15. The method of claim 12 , wherein the plurality of orifices are distributed asymmetrically around the central longitudinal axis of the heat sink.

16. The method of claim 11 , wherein the base is planar.

17. The method of claim 11 , wherein the base comprises a metal core printed circuit board.

18. The method of claim 11 , wherein the rib and the plurality of fins are formed from a unitary block of metal.

19. The method of claim 11 , further comprising:
embedding a plurality of light sources on the base.

Assignees

• Fluence Bioengineering Inc

Inventors

• Duong Dung
• Johnson Randall
• Klase Nicholas

Classifications

• H10W40/22

  characterised by their shape, e.g. having conical or cylindrical projections · CPC title

• F21V29/83

  the elements having apertures, ducts or channels, e.g. heat radiation holes · CPC title

• F21V29/76

  with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section · CPC title

• F28D2021/0029

  Heat sinks · CPC title

• F28F3/025

  the means being corrugated, plate-like elements · CPC title