A method of fabricating a micro light emitting diode (micro LED) array substrate having a plurality of micro LEDs is provided. The method includes forming a plurality of signal lines on a base substrate (10); depositing a semiconductor material on the base substrate (10) to form a semiconductor material layer; and patterning the semiconductor material layer to form a semiconductor layer (500) of the plurality of micro LEDs. A surface of the plurality of signal lines away from the base substrate (10) is uncovered during depositing the semiconductor material. The plurality of signal lines form a grid for facilitating epitaxial growth of the semiconductor material.
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