Flexible panel and method of fabricating the same
The invention provides a flexible panel and a method of fabricating the same. The flexible panel includes a flexible substrate, an overcoat layer and a device layer. The overcoat layer is disposed over and directly contacting the flexible substrate. The device layer is disposed over the overcoat layer. In the invention, the flexible substrate can be directly formed on the carrier, such that an additional layer that helps release between the carrier and the flexible substrate may not be needed, and the flexible substrate can be separated from the carrier by the overcoat layer thereon, thereby reducing the production costs and ensure the quality of the flexible panel.
1. A flexible display panel, comprising:
a flexible display substrate;
an overcoat layer disposed over and directly contacting the flexible display substrate, wherein an adhesive force of the overcoat layer obtained according to an ASTM D3359 cross-cut test is greater than 4B;
a device layer disposed over the overcoat layer; and
an optical layer disposed between the overcoat layer and the device layer.
2. The flexible display panel of claim 1 , wherein the device layer comprises one of a touch electrode layer, a liquid crystal display structure, an organic light emitting diode display structure and a micro light emitting diode display structure.
3. The flexible display panel of claim 1 , wherein a thickness of the overcoat layer is in a range from 0.5 microns to 2 microns.
4. A method of fabricating a flexible panel, comprising:
providing a carrier;
forming a flexible substrate over and directly contacting the carrier;
forming an overcoat layer over and directly contacting the flexible substrate and the carrier, wherein a peeling force between the overcoat layer and the carrier is greater than a peeling force between the flexible substrate and the carrier;
forming a device layer over the overcoat layer;
performing a cutting process on a stacked structure of the flexible substrate and the overcoat layer to remove a portion of the overcoat layer that directly contacts the carrier; and
separating the device layer, the cut flexible substrate and the cut overcoat layer from the carrier.
5. The method of claim 4 , wherein a peeling force between the overcoat layer and the carrier is greater than or equal to 100 gf/cm.
6. The method of claim 4 , wherein a peeling force between the flexible substrate and the carrier is less than or equal to 20 gf/cm.
7. The method of claim 4 , wherein water contact angles of the flexible substrate and the carrier are all greater than 40 degrees.
8. The method of claim 4 , wherein an adhesive force of the overcoat layer obtained according to an ASTM D3359 cross-cut test is greater than 4B.
9. The method of claim 4 , wherein the overcoat layer includes an organic material layer.
10. A flexible display panel, comprising:
a flexible display substrate;
an overcoat layer disposed over and directly contacting the flexible display substrate, wherein an adhesive force of the overcoat layer obtained according to an ASTM D3359 cross-cut test is greater than 4B;
a device layer disposed over the overcoat layer; and
a waterproof layer disposed between the overcoat layer and the device layer.