Conductive film
There is provided a conductive film having conductivity in a surface direction, being deformable, having excellent durability, and transmitting visible light. A conductive film includes a film substrate and a conductive material layer. The conductive material layer is provided on a first substrate surface of the film substrate. A plurality of through holes penetrating the film substrate and the conductive material layer in a thickness direction are formed in the conductive film. The conductive material layer has a plurality of conductive portions, and the conductive portions are present between adjacent layer opening portions. The number of the conductive portion is 400 per 1 mm 2 , and an opening ratio of the conductive material layer is at least 40%.
1. A conductive film comprising:
a film substrate; and
a conductive material layer provided on a film substrate surface on one side of the film substrate,
wherein a plurality of through holes penetrating the film substrate and the conductive material layer in a thickness direction are formed,
wherein the conductive material layer has conductive portions between adjacent opening portions, the number of conductive portions is at least 400 per 1 mm 2 , and an opening ratio of the conductive material layer is at least 40%, and
wherein the film substrate includes a hydrophobic polymer, and the hydrophobic polymer includes any one of polybutadiene, polyisoprene, a polydimethylsiloxane derivative, or polyisobutylene.
2. The conductive film according to claim 1 , wherein a thickness of the film substrate is in a range of 0.2 μm to 20 μm.
3. The conductive film according to claim 1 , wherein the plurality of through holes are regularly arranged along the film substrate surface on one side.
4. The conductive film according to claim 3 , wherein the film substrate has a honeycomb-like structure in a case of being seen in a vertical direction of the film substrate surface on one side.
5. The conductive film according to claim 4 , wherein a thickness of a partition between the adjacent through holes gradually decreases toward a center of the film substrate in a thickness direction.
6. The conductive film according to claim 5 , wherein the partition has a partition wall opening portion on the center of the film substrate in the thickness direction.
7. The conductive film according to claim 1 , wherein the conductive material layer is formed of gold, and a thickness of the conductive material layer is in a range of 10 nm to 50 nm.
8. The conductive film according to claim 1 , wherein the conductive material layer is a member formed by a sputtering method.
9. The conductive film according to claim 1 , further comprising:
a gel layer or an elastomer layer on a film substrate surface on the other side of the film substrate.