Main advantages are: Small size of the LED chip (close to point source) High heat loading from the active layer Homogeneous current flow Cost effective (due to small size)
As a result we have very good quantum efficiency in a wide current range.
The other available LED chip design is Mid IR Flip-chip (LEDXXFC models). Main advantage of this design is free top surface. Larger area gives higher total optical power.
Cost of LEDs with flip-chips design is higher due to larger size.
