Granted Patent B2

US 12,477,867 · App. 17/564,488 · Granted Nov 18, 2025

Inventor: Young Rag Do (Seoul, KR)

Assignee: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

H10H20/8312H10H20/01H10H20/825H10H20/832H10H20/032

Abstract

Claims (15)

1 . A method of manufacturing an ultra-thin LED electrode assembly, the method comprising:

(1) an operation of preparing a lower electrode line including a first electrode;

(2) an operation of treating an ink composition including a plurality of ultra-thin LED elements on the first electrode, wherein each ultra-thin LED element comprises each including a first conductive semiconductor layer, a photoactive layer, and a second conductive semiconductor layer which are stacked, and has a ratio of 1:0.5 to 1.5 between a thickness which is a stacking direction and a length of a long axis in a cross-section perpendicular to the stacking direction, and has a thickness of 2 μm or less and a maximum surface area of 4.0 μm 2 or less which is a maximum value among areas of a vertical projection surface;

(3) an operation of assembling the ultra-thin LED elements to be upright in a thickness direction on the first electrode; and

(4) an operation of forming an upper electrode line including a second electrode to be electrically connected to a side opposite one side of each of the ultra-thin LED elements assembled on the first electrode.

2 . The method of claim 1 , wherein:

a magnetic layer is further provided on one side of the ultra-thin LED element in the thickness direction and on a disposition region in the first electrode where the ultra-thin LED element is disposed; and

a magnetic field is formed in a direction perpendicular to a main surface of the first electrode so that the ultra-thin LED element is moved to the disposition region and disposed upright in the thickness direction in the operation (3).

3 . The method of claim 1 , wherein:

a first charge layer having a positive charge or negative charge is further provided on one side of the ultra-thin LED element in the thickness direction;

a second charge layer having a charge opposite that of the first charge layer is further provided on a disposition region in the first electrode where the ultra-thin LED element is disposed; and

an electric field is formed in a direction perpendicular to a main surface of the first electrode so that the ultra-thin LED element is moved to the disposition region and disposed upright in the thickness direction in the operation (3).

4 . The method of claim 1 , wherein:

the ultra-thin LED elements are assembled to be upright on the disposition region through a chemical bond through a bonding layer between one side of the ultra-thin LED element in the thickness direction and the disposition region in the first electrode where the ultra-thin LED element is disposed in the operation (3); and

the bonding layer is provided on one side of the ultra-thin LED element in the thickness direction and on either one or both sides of the disposition region.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (17)