US 12,069,902 B2
Display apparatus that includes concavo-convex structure on upper surface of pixel defining layer and method of manufacturing the same
Hyungguen Yoon, Yongin-si (KR); Hongyeon Lee, Yongin-si (KR); Sukhoon Kang, Yongin-si (KR); Heera Kim, Yongin-si (KR); Suji Park, Yongin-si (KR); and Beomsoo Shin, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-Si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on May 16, 2023, as Appl. No. 18/198,163.
Application 18/198,163 is a division of application No. 16/702,536, filed on Dec. 4, 2019, granted, now 11,690,252.
Claims priority of application No. 10-2019-0061452 (KR), filed on May 24, 2019.
Prior Publication US 2023/0292556 A1, Sep. 14, 2023
Int. Cl. H10K 59/122 (2023.01); H10K 59/12 (2023.01); H10K 71/10 (2023.01); G09G 3/3233 (2016.01)
CPC H10K 59/122 (2023.02) [H10K 71/191 (2023.02); G09G 3/3233 (2013.01); H10K 59/1201 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a display apparatus, the method comprising:
preparing a substrate;
forming a pixel electrode on the substrate;
forming a pixel defining layer on the pixel electrode, the pixel defining layer having an opening that exposes a central portion of the pixel electrode; and
forming a liquid-repellent layer on the pixel defining layer, the liquid-repellent layer including an upper surface having a concavo-convex structure,
wherein the forming of the liquid-repellent layer comprises:
forming an organic material layer including an organic material for forming the pixel defining layer mixed with a first liquid-repellent agent and a second liquid-repellent agent having different surface energies from each other;
baking the organic material layer and phase-separating the pixel defining layer, the first liquid-repellent agent, and the second liquid-repellent agent such that the first liquid-repellent agent and the second liquid-repellent agent are located on the pixel defining layer;
irradiating plasma to remove a liquid-repellent layer remaining on an upper surface of the pixel electrode; and
baking the pixel defining layer after the irradiating the plasma.