US Patent 10158043 Light-emitting diode and method for manufacturing the same

A method for manufacturing a light-emitting diode (LED) includes plural steps as follows. A first type semiconductor layer is formed. A second type semiconductor layer is formed on the first type semiconductor layer. An impurity is implanted into a first portion of the second type semiconductor layer. The concentration of the impurity present in the first portion of the second type semiconductor layer is greater than the concentration of the impurity present in a second portion of the second type semiconductor layer after the implanting, such that the resistivity of the first portion of the second type semiconductor layer is greater than the resistivity of the second portion of the second type semiconductor layer.