Transparent conductor, method for producing same, and touch panel
The transparent conductor involves a first laminate part including a transparent resin substrate and a transmittance-controlling layer, and a second laminate part including the transparent resin substrate, the transmittance-controlling layer, a metal layer containing silver or a silver alloy, and a metal oxide layer in the order presented. The first laminate part and the second laminate part are adjacent to each other in a direction perpendicular to the direction of lamination of the first laminate part and the second laminate part, and the difference between the transmittance of the first laminate part in the direction of lamination, T 1 , and the transmittance of the second laminate part in the direction of lamination, T 2 , (T 2 −T 1 ) is 4% or more.
1. A transparent conductor comprising a transparent resin substrate, wherein the transparent conductor comprises:
a first laminate part including the transparent resin substrate and a transmittance-controlling layer; and
a second laminate part including the transparent resin substrate, the transmittance-controlling layer, a metal layer containing silver or a silver alloy, and a metal oxide layer in the order presented,
the first laminate part and the second laminate part are adjacent to each other in a direction perpendicular to a direction of lamination of the first laminate part and the second laminate part, and
difference between transmittance of the first laminate part in the direction of lamination, T 1 , and transmittance of the second laminate part in the direction of lamination, T 2 , (T 2 −T 1 ) is 4% or more.
2. The transparent conductor according to claim 1 , wherein the T 2 is 80% or higher.
3. The transparent conductor according to claim 1 wherein
a refractive index of the transmittance-controlling layer is 1.8 to 2.5, and
a refractive index of the metal oxide layer is 1.8 to 2.3.
4. The transparent conductor according to claim 1 wherein
the first laminate part and the second laminate part each include a high refractive index layer between the transparent resin substrate and the transmittance-controlling layer, and
a refractive index of the high refractive index layer is 1.55 to 1.8.
5. The transparent conductor according to claim 1 , wherein
the first laminate part and the second laminate part each include, between the transparent resin substrate and the transmittance-controlling layer, a low refractive index layer and a high refractive index layer in the order presented from a transparent resin substrate side,
a refractive index of the high refractive index layer is 1.55 to 1.8, and
a refractive index of the low refractive index layer is lower than the refractive index of the high refractive index layer and is 1.4 to 1.6.
6. The transparent conductor according to claim 1 , wherein the first laminate part and the second laminate part each include a hardcoat layer in a side opposite to a transmittance-controlling layer side of the transparent resin substrate.
7. The transparent conductor according to claim 1 , wherein
the transmittance-controlling layer contains at least one of zinc oxide and tin oxide, and
the metal oxide layer has a composition different from a composition of the transmittance-controlling layer, and contains at least one selected from the group consisting of zinc oxide, gallium oxide, germanium oxide, indium oxide, titanium oxide, and tin oxide.
8. The transparent conductor according to claim 1 , wherein
the first laminate part and the second laminate part each include a glass layer in a side opposite to a transparent resin substrate side,
transmittance of a third laminate part including the first laminate part and the glass layer in the direction of lamination, T 3 , is 90% or lower, and
transmittance of a fourth laminate part including the second laminate part and the glass layer in the direction of lamination, T 4 , is 85% or higher.
9. A transparent conductor comprising a transparent resin substrate, wherein
the transparent conductor is obtained by etching a laminate including the transparent resin substrate, a transmittance-controlling layer, a metal layer containing silver or a silver alloy, and a metal oxide layer in the order presented to remove a part of the metal layer and the metal oxide layer, without removing the transmittance-controlling layer,
the transparent conductor comprises a first laminate part including the transparent resin substrate and a transmittance-controlling layer and a second laminate part including the transparent resin substrate, the transmittance-controlling layer, a metal layer containing silver or a silver alloy, and a metal oxide layer in the order presented, and
the first laminate part and the second laminate part are adjacent to each other in a direction perpendicular to a direction of lamination of the first laminate part and the second laminate part.
10. A transparent conductor comprising a transparent resin substrate, wherein the transparent conductor comprises:
a third laminate part including the transparent resin substrate, a transmittance-controlling layer, and a glass layer in the order presented; and
a fourth laminate part including the transparent resin substrate, the transmittance-controlling layer, a metal layer containing silver or a silver alloy, a metal oxide layer, and the glass layer in the order presented,
the third laminate part and the fourth laminate part are adjacent to each other in a direction perpendicular to a direction of lamination of the third laminate part and the fourth laminate part,
transmittance of the third laminate part in the direction of lamination, T 3 , is 90% or lower, and
transmittance of the fourth laminate part in the direction of lamination, T 4 , is 85% or higher.
11. The transparent conductor according to claim 8 , wherein an absolute value of difference between the transmittance T 3 and the transmittance T 4 (T 4 −T 3 ) is 1% or less.
12. A transparent conductor comprising a transparent resin substrate, wherein the transparent conductor comprises:
a third laminate part including the transparent resin substrate, a transmittance-controlling layer, and a glass layer in the order presented; and
a fourth laminate part including the transparent resin substrate, the transmittance-controlling layer, a metal layer containing silver or a silver alloy, a metal oxide layer, and the glass layer in the order presented,
the third laminate part and the fourth laminate part are adjacent to each other in a direction perpendicular to a direction of lamination of the third laminate part and the fourth laminate part, and
the transmittance-controlling layer is an insulating layer.
13. A touch panel comprising one or more sensor films on a panel sheet, wherein
at least one of the sensor films is configured with the transparent conductor according to claim 1 .
14. A method for producing the transparent conductor according to claim 1 , the method comprising:
a step of etching a laminate including the transparent resin substrate, the transmittance-controlling layer, the metal layer, and the metal oxide layer in the order presented to remove a part of the metal layer and the metal oxide layer, without removing the transmittance-controlling layer, for formation of the first laminate part and the second laminate part.
15. The transparent conductor according to claim 2 ,
wherein
the first laminate part and the second laminate part each include, between the transparent resin substrate and the transmittance-controlling layer, a low refractive index layer and a high refractive index layer in the order presented from a transparent resin substrate side,
a refractive index of the high refractive index layer is 1.55 to 1.8, and
a refractive index of the low refractive index layer is lower than the refractive index of the high refractive index layer and is 1.4 to 1.6.
16. The transparent conductor according to claim 10 , wherein an absolute value of difference between the transmittance T 3 and the transmittance T 4 (T 4 −T 3 ) is 1% or less.
17. A touch panel comprising one or more sensor films on a panel sheet, wherein
at least one of the sensor films is configured with the transparent conductor according to claim 9 .
18. A touch panel comprising one or more sensor films on a panel sheet, wherein
at least one of the sensor films is configured with the transparent conductor according to claim 10 .
19. A touch panel comprising one or more sensor films on a panel sheet, wherein
at least one of the sensor films is configured with the transparent conductor according to claim 12 .
20. A method for producing the transparent conductor according to claim 9 , the method comprising:
a step of etching a laminate including the transparent resin substrate, the transmittance-controlling layer, the metal layer, and the metal oxide layer in the order presented to remove a part of the metal layer and the metal oxide layer, without removing the transmittance-controlling layer, for formation of the first laminate part and the second laminate part.