Provided in the present specification is a novel structured semiconductor light-emitting element capable of preventing an electrode forming failure due to an arrangement error occurring during assembly or transfer of semiconductor light-emitting elements on a substrate, when a display device is implemented using the semiconductor light-emitting elements, wherein at least one of a plurality of semiconductor light-emitting elements according to one embodiment of the present disclosure comprises: a first conductive type semiconductor layer; a second conductive type semiconductor layer located on the first conductive type semiconductor layer; an active layer arranged between the first conductive type semiconductor layer and the second conductive type semiconductor layer; a second conductive type electrode located on the second conductive type semiconductor layer; and a first conductive type electrode located on at least a one-side stepped portion of the first conductive type semiconductor layer exposed by etching a portion of the second conductive type semiconductor layer and the active layer.

A self-assembly apparatus and method of the present invention for semiconductor light-emitting devices can separate semiconductor light-emitting devices attached to each other by vibrating a fluid during self-assembly to thereby prevent mis-assembly and, for smooth assembly of the semiconductor light emitting devices, generate a flow of the fluid along the movement direction of a magnet. The self-assembly apparatus comprises: a chamber in which a plurality of semiconductor light-emitting devices comprising a magnetic substance and a fluid are accommodated; a transfer unit for transferring, to an assembly location, a substrate on which the semiconductor light-emitting devices are to be assembled; a magnet spaced apart from the chamber to apply a magnetic force to the semiconductor light-emitting devices; a location control unit for controlling a location of the magnet; and a vibration generation unit for generating vibration in the fluid to thereby separate the semiconductor light-emitting devices from each other.

A method for manufacturing a display device can include forming an assembly electrode on a substrate; applying an insulating layer on the assembly electrode; disposing a partition wall on the insulating layer; defining an assembly groove in the partition wall; providing an light emitting diode (LED) having an assembly face corresponding to a shape of the assembly groove in the partition wall; and assembling the assembly face of the LED into the assembly groove in the partition wall, in which the LED includes a first electrode, a first semiconductor layer, an active layer, a second semiconductor layer, and a second electrode stacked in a first direction to form a stacked structure.

According to an embodiment of the present invention, a removal module using an electric field and a magnetic field so as to self-assemble, on cells arranged in a matrix form of an assembly substrate, semiconductor light-emitting elements introduced in a fluid accommodated in a chamber, and then remove a semiconductor light-emitting element mis-assembled with the assembly substrate comprises: a fluid supply unit for supplying the fluid; and a housing of which one side is connected to the fluid supply unit, an upper plate is adjacent to the assembly substrate, and a lower plate is adjacent to the chamber, wherein the upper plate has: a nozzle hole allowing communication between the inner space of the housing and the inner space of the chamber so that the fluid supplied from the fluid supply unit is injected at a site in which the semiconductor light-emitting element is mis-assembled on the assembly substrate; and one pair of partition parts facing each other with the nozzle hole as the center thereof.

The present disclosure relates to a method for manufacturing a display device capable of transferring semiconductor light emitting diodes formed at predetermined intervals on a growth substrate to a wiring board or an assembly board while maintaining the intervals when the semiconductor light emitting diodes are transferred from the growth substrate to the assembly board by self-assembly.

A dipole alignment device includes an electric field forming part including a stage, and a probe part which form an electric field on the stage; an inkjet printing apparatus including at least one inkjet head which sprays ink including dipoles and a solvent with the dipoles dispersed therein onto the stage; a transportation part comprising a first moving part which moves the electric field forming part in at least one direction; and a light irradiation apparatus including a light irradiation part which applies light to the ink sprayed onto the stage.

Discussed is a device for self-assembling semiconductor light-emitting diodes includes a substrate chuck that is provided in an assembly chamber and supports a substrate and disposes the substrate at an assembly position, wherein the substrate chuck sucks or injects a gas present between the substrate and a fluid during loading and unloading of the substrate.

A display device includes a first substrate, a first electrode on the first substrate, a second electrode on the first substrate and spaced from the first electrode, a plurality of light-emitting elements each having respective end portions on the first and second electrodes, a first transistor having a first end connected to the first electrode and a second end grounded, and a second transistor having a first end connected to the second electrode and a second end grounded, wherein the first transistor is forward-biased to the first electrode, and the second transistor is reverse-biased to the second electrode.

Provided is a dispenser for a solution including a reservoir configured to hold a suspension of micro light-emitting diodes (LEDs) suspended in a solvent; a stirrer configured to stir the suspension in the reservoir; a discharge path including a first valve configured to control outflow of the suspension from the reservoir; a filling path including a second valve configured to control inflow of the suspension into the reservoir; a hydraulic path including a third valve configured to control a pressure inside the reservoir; and a washing path connected to the first valve and configured to input a washing fluid for washing the discharge path into the discharge path, wherein the first valve includes a multi-way valve configured to selectively connect the discharge path to one of the reservoir and the washing path.

A display device in accordance with some embodiments may include a substrate, a first interlayer insulating layer on the substrate, a data conductor on the first interlayer insulating layer, a passivation layer on the data conductor, a pixel electrode layer on the passivation layer, and a shielding electrode between the data conductor and the pixel electrode layer, and defining a first contact opening and a second contact opening, wherein the data conductor and the pixel electrode layer are electrically coupled to each other in each of the first contact opening and the second contact opening.