Patent ID: 8174039
Filing Date: 2012-05-08
Classification: H01L

Abstract:
1. A light-emitting diode device with high luminescent efficiency comprising: a substrate; a semiconductor stack structure formed on the substrate, wherein the semiconductor stack structure includes an area of the main position and an area of surrounding part which surrounds said area of the main position; a main stack structure formed on the area of the main position; a plurality of secondary pillars formed on the area of surrounding part, wherein the main stack structure and each of the secondary pillars respectively have a first conducting-type semiconductor layer, a luminescing layer, and a second conducting-type semiconductor layer formed on the substrate in sequence, and each of the secondary pillars has a size less than that of the main stack structure; a transparent insulating layer filling the gaps between the plurality of secondary pillars; a transparent conducting layer coated on the main stack structure, the plurality of secondary pillars and the transparent insulating layer; a first electrode formed on the transparent conducting layer and located in the area of main position; and a second electrode formed on the area of surrounding part, wherein the second electrode is surrounded by the plurality of secondary pillars; wherein both the area of main position and the area of surrounding part are luminescing areas.