US 12,016,208 B2
Display device and method of manufacturing display device
Eiji Koike, Sakai (JP); Tohru Sonoda, Sakai (JP); and Masahiro Inuzuka, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/278,549
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Sep. 28, 2018, PCT No. PCT/JP2018/036449
§ 371(c)(1), (2) Date Mar. 22, 2021,
PCT Pub. No. WO2020/065963, PCT Pub. Date Apr. 2, 2020.
Prior Publication US 2021/0351252 A1, Nov. 11, 2021
Int. Cl. H01L 27/32 (2006.01); H01L 51/52 (2006.01); H10K 50/84 (2023.01); H10K 59/122 (2023.01)
CPC H10K 59/122 (2023.02) [H10K 50/841 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display device comprising a display area and a frame area around the display area, the display area including a stack body including: a thin-film transistor (TFT) layer; a light-emitting element layer including an anode, a functional layer, a cathode, and a pixel bank covering an edge of the anode; and a sealing layer;
the sealing layer including at least one organic film, and a partition wall provided in the frame area, the partition wall being configured to delineate an edge of the at least one organic film;
the display device further comprising, between the display area and the partition wall, a contact area in which the cathode is electrically connected to a metal film made of a same material and in a same layer as the anode; and
an insular test element group (TEG) pattern provided in the contact area, the insular TEG pattern being made of a same material as the functional layer, wherein
the metal film has a first opening at least partially overlapped by the insular TEG pattern when viewed from above with respect to a stacking direction for the stack body.