US 11,877,391 B2
Conductive film and conductive film roll, electronic paper, touch panel and flat-panel display comprising the same
Takeshi Kamijo, Tokyo (JP); Sora Hida, Tokyo (JP); Tetsuro Sugimoto, Tokyo (JP); and Yu Tomono, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/264,493
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Jul. 30, 2019, PCT No. PCT/JP2019/029912
§ 371(c)(1), (2) Date Jan. 29, 2021,
PCT Pub. No. WO2020/027162, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-142057 (JP), filed on Jul. 30, 2018; and application No. 2018-142101 (JP), filed on Jul. 30, 2018.
Prior Publication US 2021/0321512 A1, Oct. 14, 2021
Int. Cl. H05K 1/09 (2006.01); H05K 1/02 (2006.01); G02F 1/1676 (2019.01); G06F 3/044 (2006.01); H05K 3/12 (2006.01); H05K 3/38 (2006.01); G02F 1/16757 (2019.01); G02F 1/167 (2019.01); H05K 3/28 (2006.01)
CPC H05K 1/0277 (2013.01) [G02F 1/1676 (2019.01); G06F 3/0445 (2019.05); H05K 3/1275 (2013.01); H05K 3/1283 (2013.01); H05K 3/388 (2013.01); G02F 1/167 (2013.01); G02F 1/16757 (2019.01); G06F 3/0446 (2019.05); G06F 2203/04102 (2013.01); H05K 1/0274 (2013.01); H05K 1/097 (2013.01); H05K 3/282 (2013.01); H05K 2201/037 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A conductive film comprising a transparent substrate and a conductive part comprising a fine metal wire pattern disposed on one side or both sides of the transparent substrate, wherein
the fine metal wire pattern is constituted by a fine metal wire, and
the conductive film satisfies the following condition (1) or (ii):
(i) the fine metal wire has voids, and when the cross-sectional area of the fine metal wire is defined as SM and the total cross-sectional area of the voids included in the cross-section of the fine metal wire is defined as SVtotal on the cross-section of the fine metal wire perpendicular to the direction of drawing of the fine metal wire, SVtotal/SM is 0.10 or more and 0.40 or less; and
(ii) when the maximum thickness of the fine metal wire on the cross-section of the fine metal wire perpendicular to the direction of drawing of the fine metal wire is defined as T, the width of the fine metal wire at a height of 0.90T from the fine metal wire interface on the transparent substrate side is defined as W0.90 and the width of the fine metal wire on the fine metal wire interface on the transparent substrate side is defined as W0, W0.90/W0 is 0.40 or more and 0.90 or less.