US 12,453,002 B2
Reinforcement board for flexible printed circuit board, flexible printed circuit board assembly, and display device
Fei Li, Beijing (CN); Xinpeng Wang, Beijing (CN); Wenxiao Niu, Beijing (CN); Hao Huang, Beijing (CN); Zijian Wang, Beijing (CN); Xiaolong Zhu, Beijing (CN); Xu Lu, Beijing (CN); and Hengzhen Liang, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/642,956
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 14, 2021, PCT No. PCT/CN2021/093843
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/249113, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 202010517121.9 (CN), filed on Jun. 9, 2020.
Prior Publication US 2022/0338345 A1, Oct. 20, 2022
Int. Cl. H05K 1/02 (2006.01); H05K 1/11 (2006.01)
CPC H05K 1/0281 (2013.01) [H05K 1/115 (2013.01); H05K 2201/2009 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A reinforcement board for flexible printed circuit board, comprising a substrate, wherein the substrate comprises a first surface and a second surface which are opposite to each other, the substrate is provided with a through hole penetrating through the first surface and the second surface, wherein each of the first surface, the second surface and a hole wall of the through hole is provided with a conductive layer, the conductive layers on the first surface and the second surface are communicated with each other by the conductive layer on the hole wall of the through hole, and the second surface is a connecting surface facing the flexible printed circuit board when the reinforcement board is fixed on the flexible printed circuit board; and
the conductive layer on the second surface is grid-shaped, the conductive layer on the second surface comprises a plurality of wires crossing each other, the plurality of wires crossing each other comprise a plurality of wires extending in a transverse direction and a plurality of wires extending in a longitudinal direction, grid holes are formed between the plurality of wires extending in the transverse direction and the plurality of wires extending in the longitudinal direction, and the grid holes are a plurality of openings which expose or do not expose the second surface.