Flexible electronic device
A flexible electronic device is provided in this disclosure. The flexible electronic device includes a base layer, an electronic unit, and a cover layer. The electronic unit is disposed on the base layer, and the cover layer is disposed on the electronic unit. The base layer has a thickness T1 and a Young's modulus E1, and the cover layer has a thickness T2 and a Young's modulus E2, wherein the electronic unit includes a metal layer, the metal layer is a multi-layer, and when a Young's modulus of the metal layer is less than 90,000 MPa, the thickness T1, the thickness T2, the Young's modulus E1, and the Young's modulus E2 comply with following expression: E2/E1≤18.33×(T2/T1) −3.15 .
1 . A flexible electronic device, comprising: a base layer having a thickness T1 and a Young's modulus E1, wherein the base layer comprises a support layer and flexible substrate; another support layer, wherein the base layer is disposed on the another support layer; an electronic unit disposed on the base layer; and a cover layer disposed on the electronic unit, the cover layer having a thickness T2 and a Young's modulus E2, wherein the electronic unit comprises a metal layer, the metal layer is a multi-layer, and when a Young's modulus of the metal layer is less than 90,000 MPa, the thickness T1, the thickness T2, the Young's modulus E1, and the Young's modulus E2 comply with following expression:
E
2
/
E
1
≤
1
8
.
3
3
×
(
T
2
/
T
1
)
-
3.15
.
2 . The flexible electronic device according to claim 1 , wherein the thickness T1 and the thickness T2 comply with following expression:
T
2
/
T
1
≤
5.
3 . The flexible electronic device according to claim 1 , wherein the cover layer comprises a protection layer.
4 . The flexible electronic device according to claim 1 , wherein the flexible electronic device bends toward the cover layer.
5 . The flexible electronic device according to claim 4 , wherein a radius of curvature of the flexible electronic device ranges from 1 millimeter (mm) to 10 mm.
6 . The flexible electronic device according to claim 1 , wherein the electronic unit comprises display elements, and the display elements comprise a first electrode, a second electrode, and a light emitting layer sandwiched between the first electrode and the second electrode.
7 . The flexible electronic device according to claim 1 , wherein a material of the metal layer comprises at least one of aluminum, magnesium, gold, silver, lead, or tin.
8 . The flexible electronic device according to claim 1 , wherein the multi-layer comprises a middle layer, and a material of the middle layer comprise aluminum.