US 12,107,204 B1
Small-pitch micro-LEDs
Jun-Youn Kim, Plymouth (GB); Mohsin Aziz, Plymouth (GB); Abdul Shakoor, Plymouth (GB); and Gary Charles Day, Plymouth (GB)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,990.
Int. Cl. H01L 33/62 (2010.01); H01L 27/15 (2006.01); H01L 33/00 (2010.01); H01L 33/10 (2010.01); H01L 33/32 (2010.01)
CPC H01L 33/62 (2013.01) [H01L 27/156 (2013.01); H01L 33/0075 (2013.01); H01L 33/10 (2013.01); H01L 33/32 (2013.01); H01L 2933/0066 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A micro-light emitting diode (micro-LED) device comprising:
a backplane including pixel drive circuits and a plurality of metal contacts in a first dielectric material layer;
an array of micro-LEDs on the backplane, wherein each micro-LED of the array of micro-LEDs comprises:
a metal electrode bonded to a metal contact of the plurality of metal contacts, wherein the metal contact has an area smaller than an area of the metal electrode and aligns with a region of the metal electrode;
a second dielectric layer on sidewalls of the metal electrode;
a back reflector on the metal electrode;
epitaxial layers on the back reflector and configured to emit visible light; and
a passivation layer on sidewalls of the back reflector and a portion of the epitaxial layers,
wherein an area of a first side of the epitaxial layers adjacent to the back reflector is equal to or less than the area of the metal electrode and is equal to or less than an area of a second side of the epitaxial layers opposing the first side; and
a common electrode between micro-LEDs of the array of micro-LEDs and coupled to sidewalls of the second side of the epitaxial layers in each micro-LED of the array of micro-LEDs.