Patent ID: 8087960
Filing Date: 2012-01-03
Classification: H01L

Abstract:
1. A method of manufacturing an LED comprising: determining a size of an exit face of a shaped substrate portion of the LED so that the exit face has at least 70% of a minimum area necessary to conserve radiance for a desired half-angle of light projected from the LED; determining a distance between the exit face and an interface between the shaped substrate portion and a quantum well region of the LED; determining shapes and positions of a set of sidewalls of the shaped substrate portion of the LED so that each sidewall is positioned and shaped to cause at least a majority of rays having a straight transmission path from the interface to that sidewall to reflect through total internal reflection to the exit face with an angle of incidence at the exit face at less than or equal to a critical angle at the exit face; and forming the shaped substrate portion of the LED in accordance with the determined size of the exit face, shapes and positions of the set of sidewalls and distance between the exit face and the interface; wherein the method is performed by performing steps in the order of: