# US 2014/0197746 A1 · Serially-connected light emitting diodes, methods of forming same, and luminaires containing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197746 A1 - Document ID: US20140197746A1 - Status: Published application - Kind: A1 - Application number: 13/739,286 - Filed: 2013-01-11 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Lighting Science Group Corporation - Applicants: Lighting Science Group Corporation - Inventors: Fredric S. Maxik; David E. Bartine; Robert R. Soler; Theodore Scone; Mark Andrew Oostdyk - Web page: https://patentgrep.com/patent/US20140197746A1 ## CPC - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - H05B 45/10: Controlling the intensity of the light - H10H 29/14: comprising multiple light-emitting semiconductor components - F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb - H10H 20/018: {Bonding of wafers} - H10H 20/813: having a plurality of light-emitting regions, e.g. multi-junction LEDs or light-emitting devices having photoluminescent regions within the bodies - H10H 20/833: Transparent materials - H10H 20/851: Wavelength conversion means - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A method of making a substantially monolithic lighting device comprising serially connected LEDs and lighting systems including the same. The serially connected LEDs may be comprised in a monolithic device comprising a first LED, a layer of conductive material, and a second LED positioned thereupon. The serially connected LEDs may also be electrically coupled to a plurality of resistors obviating the necessity of an AC/DC power converter when a luminaire containing the serially connected LEDs is connected to an AC power source. ## Claims ### Claim 1 A method of fabricating a lighting device comprising the steps of: providing a substrate having a surface; forming a substantially planar first LED on the surface of the substrate, the first LED having a surface; attaching a substantially planar first layer of conductive material on the surface of the first LED, the conductive material having a surface; forming a substantially planar second LED on the surface of the conductive material; etching a plurality of troughs through each of the second LED, the first layer of conductive material, and the first LED; and removing the substrate. ### Claim 2 (depends on 1) A method according to claim 1 wherein at least one of first LED, the second LED, and the layer of conductive material comprises a transparent material. ### Claim 3 (depends on 1) A method according to claim 1 wherein each of the first LED and second LED comprises a side surface, the method further comprising the step of attaching a color conversion layer to the side surface of at least one of the first LED and the second LED. ### Claim 4 (canceled) ### Claim 5 (depends on 41) A method according to claim 41 wherein the plurality of troughs are configured in a grid pattern. ### Claim 6 (depends on 1) A method according to claim 1 wherein the second LED comprises a surface, further comprising the steps of: attaching a second layer of conductive material to the surface of the second LED, the second layer of conductive material having a surface; and forming a third LED on the surface of the second layer of conductive material. ### Claim 7 (depends on 1) A method according to claim 1 wherein at least one of the first LED and the second LED are formed by metalorganic chemical vapor deposition (MOCVD). ### Claim 8 (depends on 1) A method according to claim 1 wherein the first layer of conductive material is attached to the surface of the first LED by ink jet material deposition. ### Claim 9 (depends on 1) A method according to claim 1 wherein the first LED is configured to emit a first color and wherein the second LED is configured to emit a second color. ### Claim 10 (depends on 1) A method according to claim 1 wherein the step of removing the substrate results in the formation of a monolithic lighting device, the method further comprising the step of encapsulating the monolithic lighting device with a clear material. ### Claim 11 (depends on 10) A method according to claim 10 wherein the clear material is heat-conducting. ### Claim at position 12 ### Claim at position 13 ### Claim at position 14 ### Claim at position 15 ### Claim at position 16 ### Claim at position 17 ### Claim at position 18 ### Claim at position 19 ### Claim at position 20 ### Claim at position 21 ### Claim at position 22 ### Claim at position 23 ### Claim at position 24 ### Claim at position 25 ### Claim at position 26 ### Claim at position 27