Patent ID: 8164108
Filing Date: 2012-04-24
Classification: H01L

Abstract:
1. A light emitting diode chip comprising: a thermal conductive substrate; an epi-layer comprising a p-type semiconductor layer arranged on the substrate, an n-type semiconductor layer on the p-type semiconductor layer facing away from the substrate, and an active layer sandwiched between the p-type semiconductor layer and the n-type semiconductor layer, and the n-type semiconductor layer comprising a stepped surface at a side thereof facing away from the substrate, and the stepped surface comprising a central portion and a peripheral portion surrounding the central portion, the n-type semiconductor layer having a thickness decreasing along directions from a center thereof to opposite lateral peripheries thereof; a thin-type ohmic contacting film arranged on the stepped surface; a transparent conducting layer arranged on the ohmic contacting film facing away from the substrate; and an electrode pad arranged on the transparent conducting layer facing away from the substrate and being located corresponding to the central portion of the stepped surface.