Light-emitting element, light-emitting module and display backlight unit

A light-emitting element, comprising:

• a semiconductor stack, comprising a main surface, a bottom surface and a side surface between the main surface and the bottom surface, the side surface being inclined to the main surface;
• an insulating material stack comprising:
• a first stack, covering the semiconductor stack and comprising a plurality of first insulating pairs, each of the plurality of first insulating pairs comprising a first sub-layer and a second sub-layer different from the first sub-layer;
• and
• a second stack, covering the semiconductor stack and comprising a plurality of second insulating pairs, each of the plurality of second insulating pairs comprising a third sub-layer and a fourth sub-layer different from the third sub-layer;
• an opening, formed in the insulating material stack;
• and
• an electrode, located on the insulating material stack, filled in the opening and electrically connecting the semiconductor stack;
• wherein the first stack covers the main surface without covering the side surface, and the second stack covers the side surface;
• and
• wherein one of the plurality of first insulating pairs has a first average thickness on the main surface, and one of the plurality of second insulating pairs has a second average thickness on the side surface, and the second average thickness is different from the first average thickness.