Manufacturing method for an LED

A manufacturing method for an LED (light emitting diode), comprising:

• providing a substrate having a buffer layer and a first N-type epitaxial layer sequentially disposed on a top face of the substrate;
• forming a blocking layer on the first N-type epitaxial layer;
• etching the blocking layer to form patterned grooves, wherein the patterned grooves penetrate the blocking layer to the first N-type epitaxial layer;
• forming a second N-type epitaxial layer on the blocking layer, the second N-type epitaxial layer contacting the first N-type epitaxial layer via a portion of the second N-type epitaxial layer in the patterned grooves;
• forming a light emitting layer, a P-type epitaxial layer and a conductive layer sequentially disposed on the second N-type epitaxial layer;
• and
• forming an N-type electrode to electrically connect with the first N-type epitaxial layer, and a P-type electrode on the conductive layer, the N-type electrode disposed on the blocking layer opposite to the P-type electrode, wherein the N-type electrode is separated from the second N-type epitaxial layer and has a portion extending into the patterned grooves to contact the first N-type epitaxial layer.