The invention provides a
chip structure, a display panel and a preparation method thereof. The
chip structure comprises an epitaxial lamination which comprises a first
semiconductor layer, a light-emitting layer and a second
semiconductor layer which are sequentially laminated along a direction from a first surface to a second surface, and is provided with a lead-out hole which at least extends to the first
semiconductor layer from the second surface; the first
electrode is electrically connected with the second semiconductor layer; the second
electrode comprises a first
electrode layer and a second electrode layer; at least part of the first electrode layer is filled in the lead-out hole and is in contact and
electrical connection with the first semiconductor layer; the second electrode layer comprises a first conductive part laminated on the first electrode layer corresponding to the lead-out hole, and along the lamination direction of the epitaxial lamination layer, the surface of one side, deviating from the first electrode layer, of the first conductive part is not lower than the second surface or lower than the second surface, and the
linear distance between the first conductive part and the second surface is smaller than the particle size of the conductive particles; the conductive particles are configured to electrically connect the second electrode with the driving substrate; therefore, the crimping area of the second electrode is increased, and the electric connection yield is improved.