Light-emitting device and method for manufacturing light-emitting device
View Patent ↗A highly reliable flexible light-emitting device is provided. The light-emitting device includes a first flexible substrate, a second flexible substrate, a light-emitting element between the first flexible substrate and the second flexible substrate, a first bonding layer; and a second bonding layer in a frame shape surrounding the first bonding layer. The first bonding layer and the second bonding layer are between the second flexible substrate and the light-emitting element. The light-emitting element includes layer containing a light-emitting organic compound between the pair of electrodes. The second bonding layer has a higher gas barrier property than the first bonding layer.
1. A method for manufacturing a light-emitting device, comprising the steps of:
forming a first separation layer over a first substrate;
forming a first layer over the first separation layer, the first layer comprising a light-emitting element;
forming a second separation layer over a second substrate;
forming a second layer over the second separation layer, the second layer comprising a coloring layer;
attaching the first substrate and the second substrate using a first bonding layer and a second bonding layer, the first bonding layer being surrounded by the second bonding layer;
curing the first bonding layer and the second bonding layer;
separating the first substrate from the first layer to leave the first layer over the second substrate;
attaching a first flexible substrate to the second substrate using a third bonding layer and a fourth bonding layer so that the first layer is covered with the third bonding layer;
curing the third bonding layer and the fourth bonding layer; and
separating the second substrate from the second layer to leave the second layer over the first flexible substrate.
2. The method for manufacturing a light-emitting device according claim 1 , wherein the step of curing the first bonding layer and the second bonding layer is performed by irradiating the first bonding layer and the second bonding layer with ultraviolet light through the second separation layer.
3. The method for manufacturing a light-emitting device according claim 1 , further comprising the step of irradiating the first separation layer with a laser beam through the first substrate before separating the first substrate from the first layer.
4. The method for manufacturing a light-emitting device according claim 1 , further comprising the step of irradiating the second separation layer with a laser beam through the second substrate before separating the second substrate from the second peeled layer.
5. The method for manufacturing a light-emitting device according claim 1 , further comprising the steps of:
forming a reflective layer between the second substrate and the second separation layer, and
forming an absorption layer between the reflective layer and the second separation layer.
6. The method for manufacturing a light-emitting device according claim 5 , wherein the absorption layer is irradiated with light to generate heat, and
wherein the second bonding layer is cured by using the heat generated by the absorption layer.
7. A method for manufacturing a light-emitting device, comprising the steps of:
forming a first layer over a first substrate provided with a first separation layer, the first layer comprising a light-emitting element;
forming a second layer over a second substrate provided with a second separation layer, the second layer comprising a coloring layer;
attaching the first substrate and the second substrate using a first bonding layer and a second bonding layer, the first bonding layer being surrounded by the second bonding layer;
curing the first bonding layer and the second bonding layer;
separating the first substrate from the first layer to leave the first layer over the second substrate;
attaching a first flexible substrate to the second substrate using a third bonding layer and a fourth bonding layer, the third bonding layer being surrounded by the fourth bonding layer;
curing the third bonding layer and the fourth bonding layer; and
separating the second substrate from the second layer to leave the second layer over the first flexible substrate.
8. The method for manufacturing a light-emitting device according claim 7 , wherein the step of curing the first bonding layer and the second bonding layer is performed by irradiating the first bonding layer and the second bonding layer with ultraviolet light through the second separation layer.
9. The method for manufacturing a light-emitting device according claim 7 , further comprising the step of irradiating the first separation layer with a laser beam through the first substrate before separating the first substrate from the first layer.
10. The method for manufacturing a light-emitting device according claim 7 , further comprising the step of irradiating the second separation layer with a laser beam through the second substrate before separating the second substrate from the second layer.
11. The method for manufacturing a light-emitting device according claim 7 , further comprising the steps of:
forming a reflective layer between the second substrate and the second separation layer, and
forming an absorption layer between the reflective layer and the second separation layer.
12. The method for manufacturing a light-emitting device according claim 11 , wherein the absorption layer is irradiated with light to generate heat, and
wherein the second bonding layer is cured by using the heat generated by the absorption layer.