Patent ID: 8394653
Filing Date: 2013-03-12
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor lighting chip, comprising steps: providing a substrate with a first block layer formed thereon, the first block layer dividing an upper surface of the substrate into a plurality of epitaxial regions; forming a first semiconductor layer on the epitaxial regions, the first semiconductor layer overlapping a part of the first block layer; forming a second block layer partly covering an upper surface of the first semiconductor layer; forming a lighting structure on an uncovered portion of the upper surface of the first semiconductor layer, the lighting structure overlapping a part of the second block layer; removing the first block layer to form a first clearance and removing the second block layer to form a second clearance; and permeating etching solution into the first and second clearances to etch the first semiconductor layer and the lighting structure, thereby forming the first semiconductor layer with an inverted frustum-shaped structure having a width thereof gradually decreasing from the upper surface to a bottom surface of the first semiconductor layer, and forming the lighting structure with an inverted frustum-shaped structure having a width thereof gradually decreasing from an upper surface to a bottom surface of the lighting structure.