US 12,439,517 B2
Circuit board structure and display device
Liang Gao, Beijing (CN); Ajuan Du, Beijing (CN); Bin Wang, Beijing (CN); Xuerui Gong, Beijing (CN); Enjian Yang, Beijing (CN); Hufei Yang, Beijing (CN); Hao Sun, Beijing (CN); Yang Wang, Beijing (CN); Feifan Li, Beijing (CN); Xiaoxia Huang, Beijing (CN); Yongle Wang, Beijing (CN); Yiqian Wu, Beijing (CN); Yilun Zeng, Beijing (CN); Guodong Zeng, Beijing (CN); and Fengping Wu, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Sichuan (CN)
Appl. No. 18/025,180
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Sep. 27, 2021, PCT No. PCT/CN2021/121102
§ 371(c)(1), (2) Date Mar. 7, 2023,
PCT Pub. No. WO2023/044930, PCT Pub. Date Mar. 30, 2023.
Prior Publication US 2024/0284596 A1, Aug. 22, 2024
Int. Cl. H05K 1/14 (2006.01); H05K 1/02 (2006.01)
CPC H05K 1/142 (2013.01) [H05K 1/028 (2013.01); H05K 2201/0195 (2013.01); H05K 2201/0206 (2013.01); H05K 2201/0338 (2013.01); H05K 2201/0715 (2013.01); H05K 2201/09036 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit board structure, comprising:
a first circuit board;
a second circuit board, connected to the first circuit board, wherein a thickness of the second circuit board is greater than that of the first circuit board, at least one corner portion forms at a joint of the first circuit board and the second circuit board, a connection line forms at a joint of the second circuit board and the first circuit board, the connection line is located at the corner portion;
a filling portion, filling in the corner portion, wherein an extending direction of the filling portion is identical to an extending direction of the corner portion, the extending direction is identical to a direction of the connection line, a thickness of a cross section of the filling portion perpendicular to the extending direction increases as a distance from the second circuit board decreases; and
an electromagnetic shielding layer, covering the first circuit board, the second circuit board and the filling portion,
wherein a width of an orthographic projection of the filling portion on the first circuit board in a first direction is less than or equal to one-half of a width of the first circuit board in the first direction.