US 11,839,119 B2
Adhesive member and display device including the same
Euttum Kim, Anyang-si (KR); and Sangwon Yeo, Cheonan-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Sep. 29, 2020, as Appl. No. 17/035,679.
Claims priority of application No. 10-2019-0140061 (KR), filed on Nov. 5, 2019.
Prior Publication US 2021/0134929 A1, May 6, 2021
Int. Cl. H10K 59/131 (2023.01); H10K 50/842 (2023.01)
CPC H10K 59/131 (2023.02) [H10K 50/8426 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display substrate comprising a plurality of first pads arranged in a first pad area and a plurality of second pads arranged in a second pad area, wherein the first pads and the second pads are arranged in different rows from the plurality of first pads;
a circuit board comprising a plurality of first circuit pads facing the plurality of first pads and a plurality of second circuit pads facing the plurality of second pads; and
an adhesive member between the display substrate and the circuit board and comprising an adhesive layer and a plurality of conductive balls distributed therein in a predetermined pattern without overlapping each other, the plurality of conductive balls including first conductive balls disposed in a first conductive area overlapping the first pad area and second conductive balls disposed in a second conductive area overlapping the second pad area, the first conductive area having substantially the same planar area as the second conductive area;
wherein a radius of the first conductive balls substantially the same as the radius of the second conductive ball,
wherein the first conductive balls comprise a first number of conductive balls arranged at a first density and the second conductive balls comprise a second number of conductive balls arranged at a second density less than the first density, and the first number is greater than the second number, and
wherein the first conductive balls and the second conductive balls are not disposed between the first pads and the second pads.