Stretchable device, display panel, sensor, and electronic device
A stretchable device includes a stretchable substrate having a plurality of incision lines that are configured to be deformable by an external force applied to the stretchable substrate, a plurality of active elements on the stretchable substrate, and a connection wire configured to electrically connect adjacent active elements of the plurality of active elements, wherein the connection wire includes a metal wire and a conductive elastic structure electrically connected to the metal wire and locally disposed in the connection wire.
1. A stretchable device, comprising:
a stretchable substrate, the stretchable substrate having a plurality of incision lines that are configured to be deformable by an external force applied to the stretchable substrate,
a plurality of active elements on the stretchable substrate, and
a connection wire configured to electrically connect adjacent active elements of the plurality of active elements,
wherein the connection wire includes
a metal wire, and
a conductive elastic structure electrically connected to the metal wire, the conductive elastic structure being in a particular, limited portion of the connection wire.
2. The stretchable device of claim 1 , wherein
the stretchable substrate comprises
a plurality of island-shaped regions, the plurality of active elements being on separate, respective island-shaped regions of the plurality of island-shaped regions, and
a stretchable region excluding the plurality of island-shaped regions, and the plurality of incision lines are in the stretchable region.
3. The stretchable device of claim 2 , wherein the connection wire is on the stretchable region of the stretchable substrate.
4. The stretchable device of claim 1 , wherein the conductive elastic structure is in contact with a portion of the metal wire that is configured concentrate stress in the metal wire based on deformation of at least the stretchable substrate.
5. The stretchable device of claim 1 , wherein the conductive elastic structure is in contact with an edge portion of the metal wire, a center portion of the metal wire, or any combination thereof.
6. The stretchable device of claim 1 , wherein the conductive elastic structure is on a particular portion of the metal wire, or at least a portion of the conductive elastic structure is embedded in the metal wire.
7. The stretchable device of claim 1 , wherein the conductive elastic structure comprises a combination of
an elastic polymer, and
at least one of a metal, a liquid metal, or a conductive nanostructure.
8. The stretchable device of claim 7 , wherein
the conductive elastic structure comprises
an elastic layer comprising the elastic polymer, and
a conductive layer on the elastic layer, the conductive layer comprising the metal,
the elastic layer comprises a first depth region and a second depth region sequentially disposed in a depth direction from a surface that is in contact with the conductive layer, and
the first depth region includes the metal.
9. The stretchable device of claim 8 , wherein
the elastic polymer is a copolymer comprising at least one rigid structural unit and at least one soft structural unit, and
a weight ratio of the rigid structural unit to the soft structural unit is greater than about 0.01 and less than about 1.
10. The stretchable device of claim 9 , wherein
the rigid structural unit comprises a styrene structural unit, an olefin structural unit, a urethane structural unit, an ether structural unit, or any combination thereof, and
the soft structural unit comprises an ethylene structural unit, a propylene structural unit, a butylene structural unit, an isobutylene structural unit, a butadiene structural unit, an isoprene structural unit, or any combination thereof.
11. The stretchable device of claim 8 , wherein the metal comprises gold (Au), silver (Ag), copper (Cu), rhodium (Rh), palladium (Pd), ruthenium (Ru), osmium (Os), iridium (Ir), platinum (Pt), an alloy thereof, or any combination thereof.
12. The stretchable device of claim 8 , wherein the metal in the first depth region of the elastic layer exists in a form of a metal cluster.
13. The stretchable device of claim 12 , wherein the conductive layer is electrically connected to the metal cluster of the elastic layer.
14. The stretchable device of claim 12 , wherein the metal cluster or the conductive layer of the elastic layer is electrically connected to the metal wire.
15. The stretchable device of claim 8 , wherein the conductive layer comprises a plurality of microcracks.
16. The stretchable device of claim 1 , wherein each active element of the plurality of active elements comprises a transistor, a light emitting element, a light absorption element, a resistive element, an imaging element, or any combination thereof.
17. A display panel comprising the stretchable device of claim 1 .
18. A sensor comprising the stretchable device of claim 1 .
19. An electronic device comprising the display panel of claim 17 .
20. An electronic device comprising the sensor of claim 18 .