Mass transfer method

A mass transfer method comprising:

• Block S1-1:
• providing at least one transfer cavity, wherein each of the at least one transfer cavity comprises a bottom plate, a cavity wall connecting to the bottom plate, and a plurality of through holes defined in the bottom plate;
• Block S1-2:
• providing an array substrate defining a plurality of capture holes;
• Block S2-1:
• placing a plurality of micro light emitting diodes into each of the at least one transfer cavity;
• Block S2-2:
• attaching the array substrate to the bottom plate;
• Block S3:
• aligning corresponding capture holes of the plurality of capture holes with the plurality of through holes by moving the array substrate;
• Block S4:
• causing the plurality of micro light emitting diodes to fall into the corresponding capture holes through the plurality of through holes;
• and
• Block S5:
• repeating Block S3 and Block S4 until each of the plurality of capture holes in the array substrate is filled with one of the plurality of micro light emitting diodes.