Embodiments of an LED disclosed has an emitter layer shaped to a controlled depth or height relative to a substrate of the LED to maximize the light output of the LED and to achieve a desired intensity distribution. In some embodiments, the exit face of the LED may be selected to conserve radiance. In...http://www.google.fr/patents/US7829358?utm_source=gb-gplus-shareBrevet US7829358 - System and method for emitter layer shaping
