Stretchable device and display panel and sensor and electronic device
A stretchable substrate includes a first elastomer, a plurality of unit devices on the stretchable substrate, a connecting wire configured to electrically connect adjacent unit devices, and a plurality of auxiliary structures each including a second elastomer and each at least partially overlapping with at least one unit device or the connecting wire, wherein the first elastomer and the second elastomer are separate, respective polymers that commonly include at least one structural unit.
1. A stretchable device, comprising:
a stretchable substrate including a first elastomer;
a plurality of unit devices on the stretchable substrate;
a connecting wire configured to electrically connect adjacent unit devices of the plurality of unit devices; and
a plurality of auxiliary structures, each auxiliary structure of the plurality of auxiliary structures at least partially overlapping with at least one unit device of the plurality of unit devices and/or the connecting wire in a vertical direction that is perpendicular to an upper surface of the stretchable substrate, the plurality of auxiliary structures each including a second elastomer,
wherein the first elastomer and the second elastomer are separate, respective polymers that commonly include at least one structural unit.
wherein the first elastomer is a first copolymer that includes a hard-structural unit of the first elastomer and a soft-structural unit of the first elastomer,
wherein the second elastomer is a second copolymer that includes a hard-structural unit of the second elastomer and a soft-structural unit of the second elastomer,
wherein the hard-structural unit of the first elastomer and the hard-structural unit of the second elastomer independently include a styrene-containing structural unit, an olefin-containing structural unit, or a combination thereof,
wherein a weight ratio of the hard-structural unit of the first elastomer to the soft-structural unit of the first elastomer is less than or equal to about 0.5, and
wherein a weight ratio of the hard-structural unit of the second elastomer to the soft-structural unit of the second elastomer is greater than or equal to about 1.5.
2. The stretchable device of claim 1 , wherein an elastic modulus of the second elastomer is higher than an elastic modulus of the first elastomer.
3. The stretchable device of claim 1 , wherein
an elastic modulus of the second elastomer is higher than an elastic modulus of the first elastomer, and
the elastic modulus of the second elastomer is lower than an elastic modulus of each separate unit device of the plurality of unit devices.
4. The stretchable device of claim 1 , wherein the first elastomer and the second elastomer is a thermoplastic elastomer.
5. The stretchable device of claim 4 , wherein the first elastomer and the second elastomer commonly belong to one of a styrene-containing polymer or an olefin-containing polymer.
6. The stretchable device of claim 1 , wherein
the first elastomer and the second elastomer commonly include at least on hard-structural unit.
7. The stretchable device of claim 6 , wherein each of the first elastomer and the second elastomer commonly include a styrene-containing structural unit.
8. The stretchable device of claim 6 , wherein the soft-structural unit of the first elastomer and the soft-structural unit of the second elastomer each include 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 a combination thereof.
9. The stretchable device of claim 1 , wherein
the plurality of unit devices are on the upper surface of the stretchable substrate, and
each auxiliary structure of the plurality of auxiliary structures is under or at least a portion of the stretchable substrate such that
the portion of the stretchable substrate is between the plurality of auxiliary structures and the plurality of unit devices in the vertical direction,
a lower surface of each auxiliary structure is exposed from a lower surface of the stretchable substrate, and
the lower surface of each auxiliary structure is coplanar with the lower surface of the stretchable substrate.
10. The stretchable device of claim 1 , wherein an area of each particular auxiliary structure is larger than an area of a corresponding unit device of the plurality of unit devices at least partially overlapped by the particular auxiliary structure.
11. The stretchable device of claim 1 , wherein the plurality of unit devices each include a light emitting device, a light absorbing device, a transistor, a resistance device, an imaging device, or a combination thereof.
12. A stretchable device, comprising:
a stretchable substrate;
a plurality of unit devices on the stretchable substrate;
a connecting wire configured to electrically connect adjacent unit devices of the plurality of unit devices; and
a plurality of auxiliary structures under or on or inside the stretchable substrate, the plurality of auxiliary structures at least partially overlapping with at least one unit device of the plurality of unit devices and/or the connecting wire in a vertical direction that is perpendicular to an upper surface of the stretchable substrate,
wherein the stretchable substrate includes a first copolymer, the first copolymer including a hard-structural unit and a soft-structural unit,
wherein each auxiliary structure of the plurality of auxiliary structures includes a second copolymer, the second copolymer including a hard-structural unit and a soft-structural unit,
wherein the hard-structural unit of the first copolymer and the hard-structural unit of the second copolymer independently include a styrene-containing structural unit, an olefin-containing structural unit, or a combination thereof,
wherein a weight ratio of the hard-structural unit of the second copolymer to the soft-structural unit of the second copolymer is larger than a weight ratio of the hard-structural unit of the first copolymer to the soft-structural unit of the first copolymer,
wherein the weight ratio of the hard-structural unit of the first copolymer to the soft-structural unit of the first copolymer is less than or equal to about 0.5, and
wherein the weight ratio of the hard-structural unit of the second copolymer to the soft-structural unit of the second copolymer is greater than or equal to about 1.5.
13. The stretchable device of claim 12 , wherein
the stretchable substrate and the plurality of auxiliary structures commonly include at least one same hard-structural unit, and
the at least one same hard-structural unit includes a styrene-containing structural unit.
14. The stretchable device of claim 12 , wherein the soft-structural unit of the second copolymer and the soft-structural unit of the first copolymer each include 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 a combination thereof.
15. The stretchable device of claim 12 , wherein the stretchable substrate and the plurality of auxiliary structures each include one of styrene-ethylene-butylene-styrene SEBS, styrene-ethylene-propylene-styrene SE PS, styrene-butadiene-styrene SBS, and styrene- isoprene-styrene SIS, styrene-isobutylene-styrene SIBS, or a combination thereof.
16. A display panel comprising the stretchable device of claim 1 .
17. A sensor comprising the stretchable device of claim 1 .