A touch panel includes an upper substrate having insulating property, an upper conductive layer on a lower surface of the upper substrate, an intermediate layer on a lower surface of the upper conductive layer, an upper electrode on a lower surface of the intermediate layer, a lower conductive layer facing the upper conductive layer with a predetermined gap interposed between the conductive layers, a lower electrode on an upper surface of the lower conductive layer, and a lower substrate on a lower surface of the lower conductive layer and having insulating property. The upper and lower electrodes contain 70 wt. % to 98 wt. % of conductive metal. The intermediate layer contains a resin and 40 wt. % to 90 wt. % of carbon and has a thickness ranging from 1 μm to 50 μm. The touch panel has resistance to environment and is applicable to a large size.
1. A touch panel comprising:
an upper substrate having insulating property;
an upper conductive layer provided on a lower surface of the upper substrate;
a first intermediate layer provided on a lower surface of the upper conductive layer;
an upper electrode provided on a lower surface of the first intermediate layer;
a lower conductive layer facing the upper electrode with a predetermined gap interposed between the lower conductive layer and the upper electrode;
a second intermediate layer provided on an upper surface of the lower conductive layer;
a lower electrode provided on an upper surface of the second intermediate layer; and
a lower substrate provided on a lower surface of the lower conductive layer, the lower substrate having insulating property,
wherein each of the upper electrode and the lower electrode contains 70 wt. % to 98 wt. % of conductive metal,
wherein the first intermediate layer contains a resin and 40 wt. % to 90 wt. % of carbon, and has a thickness ranging from 1 μm to 50 μm, and
wherein the second intermediate layer contains a resin and carbon.
2. The touch panel according to claim 1 , wherein the carbon included in the first intermediate layer contains carbon black and not less than 40 wt. % and not more than 65 wt. % of graphite.
3. The touch panel according to claim 2 , further comprising
an insulating layer provided on a lower surface of the upper electrode,
wherein the upper electrode and the first intermediate layer are covered between the insulating layer and the upper conductive layer.
4. The touch panel according to claim 1 , further comprising
an insulating layer provided on a lower surface of the upper electrode,
wherein the upper electrode and the first intermediate layer are covered between the insulating layer and the upper conductive layer.
5. The touch panel according to claim 1 , wherein the conductive metal contained in the upper electrode and the lower electrode comprises silver.
6. The touch panel according to claim 1 , wherein the second intermediate layer contains the resin and 40 wt. % to 90 wt. % of the carbon, and has a thickness ranging from 1 μm to 50 μm.
7. The touch panel according to claim 6 , wherein the carbon contained in the second intermediate layer contains carbon black and not less than 40 wt. % and not more than 65 wt. % of graphite.
8. The touch panel according to claim 1 , wherein the upper electrode entirely covers the lower surface of the first intermediate layer.
9. The touch panel according to claim 1 , wherein the lower electrode entirely covers the upper surface of the second intermediate layer.
10. A touch panel comprising:
an upper substrate having insulating property;
an upper conductive layer provided on a lower surface of the upper substrate;
an intermediate layer provided on a lower surface of the upper conductive layer;
an upper electrode provided on a lower surface of the intermediate layer;
a lower conductive layer facing the upper electrode with a predetermined gap interposed between the lower conductive layer and the upper electrode;
a lower electrode provided on an upper surface of the lower conductive layer; and
a lower substrate provided on a lower surface of the lower conductive layer, the lower substrate having insulating property,
wherein each of the upper electrode and the lower electrode contains 70 wt. % to 98 wt. % of conductive metal,
wherein the intermediate layer contains a resin and 40 wt. % to 90 wt. % of carbon, and has a thickness ranging from 1 μm to 50 μm, and
wherein the upper electrode entirely covers the lower surface of the intermediate layer.
11. The touch panel according to claim 10 , wherein the carbon contains carbon black and not less than 40 wt. % and not more than 65 wt. % of graphite.
12. The touch panel according to claim 11 , further comprising
an insulating layer provided on a lower surface of the upper electrode,
wherein the upper electrode and the intermediate layer are covered between the insulating layer and the upper conductive layer.
13. The touch panel according to claim 10 , further comprising
an insulating layer provided on a lower surface of the upper electrode,
wherein the upper electrode and the intermediate layer are covered between the insulating layer and the upper conductive layer.
14. The touch panel according to claim 10 , wherein the conductive metal contained in the upper electrode and the lower electrode comprises silver.
15. A touch panel comprising:
an upper substrate having insulating property;
an upper conductive layer provided on a lower surface of the upper substrate;
an intermediate layer provided on a lower surface of the upper conductive layer;
an upper electrode provided on a lower surface of the intermediate layer;
a lower conductive layer facing the upper electrode with a predetermined gap interposed between the lower conductive layer and the upper electrode;
a lower electrode provided on an upper surface of the lower conductive layer; and
a lower substrate provided on a lower surface of the lower conductive layer, the lower substrate having insulating property,
wherein each of the upper electrode and the lower electrode contains 70 wt. % to 98 wt. % of conductive metal,
wherein the intermediate layer contains a resin and 40 wt. % to 90 wt. % of carbon, and has a thickness ranging from 1 μm to 50 μm, and
wherein the upper conductive layer includes:
a light-transmitting conductive layer; and
a conductive polymer film closer to the intermediate layer than the light-transmitting conductive layer.
16. The touch panel according to claim 15 , wherein the light-transmitting conductive layer is provided on the lower surface of the upper substrate.
17. The touch panel according to claim 15 , wherein the conductive polymer layer is provided on a lower surface of the light-transmitting conductive layer.
18. The touch panel according to claim 15 , wherein the intermediate layer is provided on a lower surface of the conductive polymer layer.
19. The touch panel according to claim 15 ,
wherein the light-transmitting conductive layer is provided on the lower surface of the upper substrate,
wherein the conductive polymer layer is provided on a lower surface of the light-transmitting conductive layer, and
wherein the intermediate layer is provided on a lower surface of the conductive polymer layer.