Method for manufacturing color micro light-emitting diode array substrate

A method for manufacturing a color micro light-emitting diode (LED) array substrate, wherein the color micro LED array substrate comprises a receiving substrate and a color micro LED array arranged on the receiving substrate;

• the receiving substrate comprises a plurality of monochromic pixel zones respectively corresponding to different colors, the color micro LED array comprising a plurality of monochromic micro LED arrays of different colors, the monochromic micro LED array of each of the colors being arranged in one of the monochromic pixel zones corresponding to the color;
• wherein a process for making the monochromic micro LED array of each color of the color micro LED array substrate comprises the following steps:
• Step S1:
• providing a supply substrate corresponding to a selected color and a receiving substrate, wherein the supply substrate is provided with a plurality of micro LEDs of the selected color;
• defining a to-be-transferred zone on the supply substrate to correspond to the monochromic pixel zone of the receiving substrate that corresponds to the selected color and defining the micro LEDs located in the to-be-transferred zone of the supply substrate as micro LEDs to be transferred, and forming metal electrodes on each of the micro LEDs to be transferred,
• wherein each of the monochromic pixel zones of the receiving substrate is provided with a plurality of driving electrodes;
• Step S2:
• aligning the supply substrate and the receiving substrate with each other such that the metal electrodes of each of the micro LEDs to be transferred are positioned above and corresponding to the driving electrodes in the monochromic pixel zone of the receiving substrate corresponding to the selected color to allow the metal electrodes of each of the micro LEDs to be transferred to couple to the driving electrodes so as to have the micro LED to be transferred bonded to the monochromic pixel zone of the receiving substrate that corresponds to the selected color;
• and
• Step S3:
• conducting laser irradiation on all the micro LEDs to be transferred among the plurality of micro LEDs on the supply substrate so as to have all the micro LEDs to be transferred separated from the supply substrate and fixed to the monochromic pixel zone that corresponds to the selected color to complete making of the monochromic micro LED array of the color;
• wherein in Step S1, a photolithographic operation is applied to form the metal electrodes on each of the micro LEDs to be transferred;
• and
• wherein in Step S2, the plurality of driving electrodes are provided thereon with low melting point solder pads.