US 12,477,905 B2
Light emitting device, manufacturing method thereof, display device, photoelectric conversion device, electronic apparatus, illumination device, and moving body
Yoshiaki Taguchi, Kanagawa (JP); Koji Ishizuya, Kanagawa (JP); Masahiko Sone, Kanagawa (JP); Akinori Makaino, Kanagawa (JP); Toshihiro Shoyama, Kanagawa (JP); and Kentaro Suzuki, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 20, 2023, as Appl. No. 18/303,751.
Claims priority of application No. 2022-075409 (JP), filed on Apr. 28, 2022; and application No. 2023-028841 (JP), filed on Feb. 27, 2023.
Prior Publication US 2023/0354651 A1, Nov. 2, 2023
Int. Cl. H04N 23/53 (2023.01); H10K 59/12 (2023.01); H10K 59/122 (2023.01); H10K 59/38 (2023.01); H10K 59/65 (2023.01); H10K 59/80 (2023.01); H10K 59/90 (2023.01)
CPC H10K 59/122 (2023.02) [H04N 23/53 (2023.01); H10K 59/1201 (2023.02); H10K 59/38 (2023.02); H10K 59/879 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a plurality of first electrodes;
an organic layer located above the plurality of first electrodes and including a light emitting layer;
a second electrode located above the organic layer; and
an insulating layer that separates the plurality of first electrodes from each other,
wherein an upper surface of each of the plurality of first electrodes includes (1) an inner region in contact with the organic layer, and (2) an outer region covered with the insulating layer,
wherein the insulating layer includes (1) an opening that defines the inner region, (2) a first upper surface, (3) a second upper surface farther from the opening than the first upper surface, and (4) a third upper surface located between the first upper surface and the second upper surface,
wherein a slope angle of the third upper surface with respect to a first electrode of the plurality of first electrodes is larger than a slope angle of the first upper surface with respect to the first electrode, and
wherein the light emitting device further comprises a groove located at a position in the first upper surface away from the opening and overlapping the outer region in a planar view.
 
17. A method of manufacturing a light emitting device, the method comprising
forming an insulating layer covering a plurality of first electrodes;
forming a groove in the insulating layer at a position overlapping an outer region of each of the plurality of first electrodes;
forming an opening in the insulating layer at a position overlapping an inner region of each of the plurality of first electrodes;
forming an organic layer including a light emitting layer on the insulating layer where the groove and the opening have been formed; and
forming a second electrode on the organic layer,
wherein the insulating layer includes (1) a first upper surface, (2) a second upper surface farther from the opening than the first upper surface, and (3) a third upper surface located between the first upper surface and the second upper surface,
wherein a slope angle of the third upper surface with respect to a first electrode of the plurality of first electrodes is larger than a slope angle of the first upper surface with respect to the first electrode, and
wherein the groove is formed at a position in the first upper surface away from the opening and overlapping the outer region in a planar view.
 
18. A light emitting device comprising:
a first light emitting element; and
a second light emitting element,
wherein the first light emitting element includes (1) a first first electrode, (2) a first organic layer including a light emitting layer, and (3) a second electrode, in that order,
wherein the second light emitting element includes (1) a second first electrode, (2) a second organic layer including a light emitting layer, and (3) the second electrode, in that order,
wherein the light emitting device comprises an insulating layer that separates the first first electrode and the second first electrode from each other,
wherein an upper surface of the first first electrode includes (1) an inner region in contact with the first organic layer, and (2) an outer region in contact with the insulating layer,
wherein an upper surface of the second first electrode includes (1) an inner region in contact with the second organic layer, and (2) an outer region in contact with the insulating layer,
wherein the insulating layer includes (1) an opening that defines the inner region of the first first electrode, (2) a first upper surface, (3) a second upper surface farther from the opening than the first upper surface, (4) a third upper surface located between the first upper surface and the second upper surface, (5) a first groove in the first surface, the first groove overlapping the outer region of the first first electrode in a planar view, and (6) a second groove overlapping the outer region of the second first electrode in a planar view,
wherein a slope angle of the third upper surface with respect to the first first electrode is larger than a slope angle of the first upper surface with respect to the first first electrode, and
wherein an aspect ratio of the first groove is different from an aspect ratio of the second groove.