US 12,457,890 B2
Method of manufacturing display device
Jun Sakuma, Sakai (JP); Yasushi Asaoka, Sakai (JP); and Makoto Kitagawa, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/038,296
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Nov. 25, 2020, PCT No. PCT/JP2020/043704
§ 371(c)(1), (2) Date May 23, 2023,
PCT Pub. No. WO2022/113179, PCT Pub. Date Jun. 2, 2022.
Prior Publication US 2024/0049585 A1, Feb. 8, 2024
Int. Cl. H10K 71/20 (2023.01); H10K 71/60 (2023.01); H10K 59/80 (2023.01)
CPC H10K 71/221 (2023.02) [H10K 71/60 (2023.02); H10K 59/80521 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a display device, the method comprising:
a) a step of preparing a substrate including
an electrode and
another electrode separated by a distance from the electrode in a plan view;
b) a step, following step a), of forming a photosensitive resin material layer on the substrate;
c) a step, following step b), of forming a charge transport material layer and a light-emitting material layer on the substrate so that an entire region where the charge transport material layer and the electrode overlap and an entire region where the light-emitting material layer and the electrode overlap overlap the photosensitive resin material layer; and
d) a step, following step c), of patterning the photosensitive resin material layer, the charge transport material layer, and the light-emitting material layer into a photosensitive resin layer, a charge transport layer, and a light-emitting layer respectively by
exposing to light, and developing, the photosensitive resin material layer using a photomask,
retaining, without lifting off, non-lift-off portions of the photosensitive resin material layer, the charge transport material layer, and the light-emitting material layer, the non-lift-off portions being provided at least on a part of the electrode, and
lifting off lift-off portions of the photosensitive resin material layer, the charge transport material layer, and the light-emitting material layer, the lift-off portions being provided at least on a part of the other electrode.