Light emitting device and led display apparatus having the same

A display apparatus, comprising:

• a display substrate including bonding pads;
• and
• light emitting devices disposed on the display substrate, each of the light emitting devices including:
• a first light emitting stack;
• a second light emitting stack disposed under the first light emitting stack;
• a third light emitting stack disposed under the second light emitting stack;
• first, second, third, and fourth connection electrodes disposed over the first light emitting stack, and electrically connected to the first, second, and third light emitting stacks;
• and
• bonding metal layers disposed on upper surfaces of the first, second, third, and fourth connection electrodes,
• wherein:
• each of the first, second, third, and fourth connection electrodes includes a groove on an upper surface thereof;
• the bonding metal layers cover the grooves of the first, second, third, and fourth connection electrodes, respectively;
• the bonding metal layers are eutectic bonded to the bonding pads;
• the first light emitting stack is electrically connected to the first connection electrode and the fourth connection electrode;
• the second light emitting stack is electrically connected to the second connection electrode and the fourth connection electrode;
• and
• the third light emitting stack is electrically connected to the third connection electrode and the fourth connection electrode.