Patent ID: 9040329
Filing Date: 2015-05-26
Classification: H01L

Abstract:
1. A manufacturing method for a light emitting diode (LED), comprising following steps: providing an LED wafer, wherein an electrically conductive layer is disposed on the LED wafer, and the LED wafer comprises a substrate and an epitaxial layer on the substrate, the electrically conductive layer being located on the epitaxial layer; providing a photoresist layer on the electrically conductive layer; roughening a lateral surface of the electrically conductive layer by wet etching; forming a depression in the LED wafer by dry etching and roughening a sidewall of the LED wafer defining the depression, the depression being recessed in the epitaxial layer without reaching the substrate; and disposing two pads respectively in the depression and on the electrically conducting layer to electrically connect with different layers of the epitaxial layer; wherein the roughened sidewall of the LED wafer by the dry etching process is flush with the roughened lateral surface of the electrically conductive layer by the wet etching process.