Device for self-assembling semiconductor light-emitting diodes

A device for self-assembling semiconductor light-emitting diodes to a substrate, the device comprising:

• an assembly chamber having a space for accommodating a fluid;
• at least one magnet configured to apply a magnetic force to the semiconductor light-emitting diodes dispersed in the fluid;
• a substrate support including a first frame and a second frame, and configured to support the substrate having an assembly electrode when the substrate is interposed between the first frame and the second frame;
• a displacement sensor configured to sense the degree of warping of the substrate caused by a weight of the substrate;
• a vertical mover configured to lower the substrate support so that one surface of the substrate is in contact with the fluid in a state in which the substrate is supported by the substrate support;
• and
• a controller connected to a position controller, configured to control a movement of the at least one magnet and the substrate support,
• wherein the controller controls a depth at which the substrate is submerged in the fluid to correct a warping of the substrate caused by the weight of the substrate, and
• wherein the first frame contacts a lower or bottom surface of the substrate and the second frame contacts an upper or top surface of the substrate that is opposite to the lower or bottom surface.