US 12,133,370 B2
Shielding film and circuit board
Zhi Su, Guangdong (CN)
Assigned to GUANGZHOU FANGBANG ELECTRONICS CO., LTD, Guangdong (CN)
Appl. No. 18/006,472
Filed by GUANGZHOU FANGBANG ELECTRONICS CO., LTD, Guangdong (CN)
PCT Filed Sep. 10, 2020, PCT No. PCT/CN2020/114440
§ 371(c)(1), (2) Date Jan. 23, 2023,
PCT Pub. No. WO2022/016687, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 202010725896.5 (CN), filed on Jul. 24, 2020.
Prior Publication US 2023/0276604 A1, Aug. 31, 2023
Int. Cl. H05K 9/00 (2006.01); H05K 1/02 (2006.01)
CPC H05K 9/0088 (2013.01) [H05K 1/0224 (2013.01); H05K 9/0086 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A shielding film, comprising: a first film layer, a contrast structural layer and an electromagnetic shielding layer,
the first film layer being disposed on a first side of the electromagnetic shielding layer,
the contrast structural layer being disposed on the first side of the electromagnetic shielding layer,
wherein the grayscale value of the color of the contrast structural layer is greater than the grayscale value of the color of the first film layer.