US 12,334,483 B2
Light emitting device for display having LED stacks
Seom Geun Lee, Ansan-si (KR); Chan Seob Shin, Ansan-si (KR); Ho Joon Lee, Ansan-si (KR); and Seong Kyu Jang, Ansan-si (KR)
Assigned to SEOUL VIOSYS CO., LTD., Ansan-si (KR)
Filed by SEOUL VIOSYS CO., LTD., Ansan-si (KR)
Filed on May 26, 2022, as Appl. No. 17/826,106.
Application 17/826,106 is a continuation of application No. 16/782,594, filed on Feb. 5, 2020, granted, now 11,362,073.
Claims priority of provisional application 62/802,784, filed on Feb. 8, 2019.
Prior Publication US 2022/0285329 A1, Sep. 8, 2022
Int. Cl. H01L 25/13 (2006.01); H10H 20/813 (2025.01); H10H 20/833 (2025.01); H10H 20/857 (2025.01)
CPC H01L 25/13 (2013.01) [H10H 20/813 (2025.01); H10H 20/833 (2025.01); H10H 20/857 (2025.01)] 19 Claims
OG exemplary drawing
 
1. A light emitting device for a display, comprising:
a circuit board;
a plurality of light emitting units arranged on the circuit board, each light emitting unit comprising a first LED stack including:
a first conductivity type semiconductor layer;
a second conductivity type semiconductor layer;
a first electrode disposed on the first conductivity type semiconductor layer; and
a second electrode disposed on the second conductivity type semiconductor layer, the second electrode being transparent;
a plurality of bump pads disposed between the plurality of light emitting units and the circuit board; and
a bonding layer disposed between the second electrode and the circuit board,
wherein the second electrode has a side surface recessed inwardly with respect to a side surface of the light emitting unit to define a recessed portion, and the bonding layer is filled in the recessed portion.