| 摘要 |
A light emitting diode includes: an epitaxial substrate having a roughened side and formed with alternately disposed ridges and valleys at the roughened side, each of the ridges having a roughened surface that is formed with a dense concentration of alternately disposed pits and protrusions; and an epitaxial layered structure formed on and covering the ridges and the valleys of the epitaxial substrate. A method for making the light emitting diode involves forming the epitaxial substrate with the ridges and valleys prior to the formation of the epitaxial layered structure.
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