# US 2018/0320876 A1 · Systems and methods for coupling a metal core pcb to a heat sink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320876 A1 - Document ID: US20180320876A1 - Status: Published application - Kind: A1 - Application number: 15/678,880 - Filed: 2017-08-16 - Published: 2018-11-08 - Earliest claimed: 2017-05-03 - Assignees: Fluence Bioengineering, Inc. - Applicants: Fluence Bioengineering - Inventors: Dung Duong; Randall Johnson; Nicholas Klase - Web page: https://patentgrep.com/patent/US20180320876A1 ## CPC - F21V 29/502: characterised by the adaptation for cooling of specific components - A01G 9/20: Forcing-frames; Lights {, i.e. glass panels covering the forcing-frames} - A01G 9/249: {Lighting means (with special arrangements for promoting growth A01G7/045)} - F21V 23/009: {the casing being inside the housing of the lighting device} - F21V 29/745: {the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend} - F21V 29/75: with fins or blades having different shapes, thicknesses or spacing - F21V 29/76: with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section - F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis} - F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes - F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence) - H05K 1/021: {Components thermally connected to metal substrates or heat-sinks by insert mounting} - H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing} - H10W 40/22: characterised by their shape, e.g. having conical or cylindrical projections - F21V 19/0055: {by screwing} - F21V 29/67: characterised by the arrangement of fans - F21W 2131/40: Lighting for industrial, commercial, recreational or military use - F21Y 2103/10: comprising a linear array of point-like light-generating elements - F21Y 2115/10: Light-emitting diodes [LED] - F28D 2021/0029: {Heat sinks} - F28F 3/025: {the means being corrugated, plate-like elements} - F28F 3/048: {in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels} - F28F 2255/16: extruded - H05K 1/05: Insulated {conductive substrates, e.g. insulated} metal substrate - H05K 3/0061: {onto a metallic substrate, e.g. a heat sink (heat sinks for electric apparatus H05K7/20)} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - 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 - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) ## 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. ## Claims ### Claim 1 A heat sink for a light fixture comprising: a plurality of fins positioned from a first end of the heat sink to a second end of the heat sink, the plurality of fins having a fin width positioned perpendicular to a central axis of the heat sink; a base being coupled to lower surfaces of the plurality of fins, the base being comprised of metal core PCB, wherein the base does not cover an entirety of the lower surfaces of the plurality of fins; orifices extending through the base, the orifices having an orifice length extending in a direction from the first end of the heat sink towards the second end of the heat sink, the orifice length being greater than an orifice width, wherein the orifices expose the central axis of the heat sink. ### Claim 2 (depends on 1) The heat sink of claim 1, wherein a base width of the base is less than the fin width of the plurality of fins. ### Claim 3 A heat sink for a light fixture comprising: a plurality of fins positioned from a first end of the heat sink to a second end of the heat sink, the plurality of fins being positioned perpendicular to a central axis of the heat sink; a base being coupled to lower surfaces of the plurality of fins, the base being comprised of metal core PCB, wherein the base does not cover an entirety of the lower surfaces of the plurality of fins; angled protrusions positioned on the sides of the base, the angled protrusions extending in a downward direction away from the lower surfaces of the plurality of fins to create a space between upper surfaces of the angled protrusions and the lower surfaces of the plurality of fins. ### Claim 4 (depends on 3) The heat sink of claim 3, wherein outer edges of the angled protrusions are positioned between the sides of the base and sides of the fins. ### Claim 5 (canceled) ### Claim 6 (canceled) ### Claim 7 (depends on 1) The heat sink of claim 1, wherein the lower surface of the fins are extruded to form a contoured depression between overhangs, the overhangs being positioned on edges of the fins. ### Claim 8 (depends on 7) The heat sink of claim 7, wherein the base is configured to be positioned between the overhangs. ### Claim 9 (depends on 8) The heat sink of claim 8, wherein the base includes a plurality of rows of vents orifices, the plurality of rows of vent orifices being offset from the central axis of the heat sink. ### Claim 10 (canceled) ### Claim 11 A method for creating a heat sink for a light fixture, the method comprising: coupling a base to lower surfaces of a plurality of fins, the plurality of fins being positioned from a first end of the heat sink to a second end of the heat sink, the plurality of fins having a fin width positioned perpendicular to a central axis of the heat sink, the base being comprised of metal core PCB, wherein the base does not cover an entirety of the lower surfaces of the plurality of fins; creating orifices extending through the base, the orifices having an orifice length extending in a direction from the first end of the heat sink towards the second end of the heat sink, the orifice length being greater than an orifice width, wherein the orifices expose the central axis of the heat sink. ### Claim 12 (depends on 11) The method of claim 11, wherein a base width of the base is less than the fin width of the plurality of fins. ### Claim 13 (depends on 11) The method of claim 11, further comprising: forming angled by bending the sides of the base along a direction in parallel with a longitudinal axis of the heat sink, the angled protrusions extending in a downward direction away from the lower surfaces of the plurality of fins to create a space between upper surfaces of the angled protrusions and the lower surfaces of the plurality of fins. ### Claim 14 (depends on 13) The method of claim 13, wherein outer edges of the angled protrusions are positioned between the sides of the base and sides of the fins. ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (depends on 16) The method of claim 16, further comprising: extruding the lower surface of the fins to form a contoured depression between overhangs, the overhangs being positioned on edges of the fins. ### Claim 18 (depends on 17) The method of claim 17, further comprising: positioning the base between the overhangs. ### Claim 19 (depends on 18) The method of claim 18, wherein the base includes a plurality of rows of vents orifices, the plurality of rows of vent orifices being offset from the central axis of the heat sink. ### Claim 20 (depends on 19) The method of claim 19, further comprising: coupling the base to the fins via a plurality of coupling orifices that are aligned with the central axis of the heat sink.