forming a light emitting stack structure by sequentially stacking a first semiconductor layer, an active layer, a second semiconductor layer, and an additional electrode on a substrate;

forming at least one light emitting stack pattern by etching the light emitting stack structure in a vertical direction, and exposing one region of the first semiconductor layer to the outside;

coating an insulating material layer made of a zinc acetate solution on the light emitting stack pattern by using a wet chemical process and drying the coated insulating material layer;

forming an insulating film surrounding an outer surface of the light emitting stack pattern by etching the dried insulating material layer in the vertical direction; and

forming the light emitting element by separating the light emitting stack pattern surrounded by the insulating film from the substrate.