Method of producing micro-LED panel
Provided is a method of producing a micro-LED panel that can produce a micro-LED panel with excellent display quality by reducing misalignment of micro-LED chips and can achieve an increased yield. The method of producing a micro-LED panel includes: producing a micro-LED chip including a micro-LED, a first contact electrode, and a light blocking component; producing an array substrate including a switching element, a second contact electrode, and an insulating film; and placing the micro-LED chip on the array substrate. The light blocking component includes a bump with an inclined surface. The insulating film includes a dent with an inclined surface. The placing of the micro-LED chip includes electrically connecting the first contact electrode to the second contact electrode by making the bump of the light blocking component opposite to the dent of the insulating film.
1 . A method of producing a micro-LED panel, the method comprising:
producing a micro-LED chip including a micro-LED, a first contact electrode electrically connected to the micro-LED, and a light blocking component surrounding the micro-LED;
producing an array substrate including a switching element, a second contact electrode electrically connected to the switching element, and an insulating film formed on the second contact electrode with part of the second contact electrode being exposed; and
placing the micro-LED chip on the array substrate,
the light blocking component including a bump with an inclined surface,
the insulating film including a dent with an inclined surface,
the placing of the micro-LED chip including electrically connecting the first contact electrode to the second contact electrode by making the bump of the light blocking component opposite to the dent of the insulating film.
2 . The method of producing a micro-LED panel according to claim 1 ,
wherein the producing of a micro-LED chip includes producing the light blocking component with an inclined surface by overlaying a half-tone mask whose transmittance changes in stages on a photosensitive resin composition and exposing the photosensitive resin composition to light through the half-tone mask.
3 . The method of producing a micro-LED panel according to claim 2 ,
wherein the half-tone mask is provided with light blockers and slits each formed between the light blockers, and
the light blockers include light blockers with different widths.
4 . The method of producing a micro-LED panel according to claim 2 ,
wherein the half-tone mask includes regions with different evaporated metal densities.
5 . The method of producing a micro-LED panel according to claim 2 ,
wherein the half-tone mask includes a stack of semi-transparent films.
6 . The method of producing a micro-LED panel according to claim 1 ,
wherein the micro-LED chip includes a wavelength conversion layer, the micro-LED, and the first contact electrode in the stated order.
7 . The method of producing a micro-LED panel according to claim 1 ,
wherein the micro-LED chip includes the micro-LED, a wavelength conversion layer, and the first contact electrode in the stated order.