Cover window and display apparatus including the same
A cover window includes a window substrate having a first hardness and including polyvinylidene fluoride (PVDF), and a hard coating layer on at least one surface of the window substrate and having a second hardness which is greater than that of the window substrate.
1. A cover window comprising:
a window substrate having a first hardness and comprising polyvinylidene fluoride (PVDF); and
a hard coating layer on at least one surface of the window substrate and having a second hardness which is greater than that of the window substrate,
wherein the window substrate comprises a copolymer of a first polymer resin and the PVDF, and
wherein a ratio of the first polymer resin and the PVDF is such that a relative permittivity of the window substrate has a value from about 3 to about 6.
2. The cover window of claim 1 ,
wherein the first polymer resin is polymethyl methacrylate (PMMA).
3. The cover window of claim 1 ,
wherein a thickness of the window substrate has a value from about 100 μm to about 650 μm.
4. The cover window of claim 1 ,
wherein the hard coating layer comprises a first hard coating layer that is on a first surface of the window substrate and has a thickness less than that of the window substrate.
5. The cover window of claim 4 ,
wherein the thickness of the first hard coating layer has a value from about 10 μm to about 50 μm.
6. The cover window of claim 4 ,
wherein a hardness of the first hard coating layer is greater than that of the window substrate, and
wherein when the hardness of the first hard coating layer is measured in a pencil hardness, the hardness of the first hard coating layer has a value of at least 7H.
7. The cover window of claim 4 ,
wherein the hard coating layer further comprises a second hard coating layer on a second surface opposite to the first surface of the window substrate.
8. The cover window of claim 7 ,
wherein a thickness of the second hard coating layer has a value from about 5 μm to about 20 μm.
9. The cover window of claim 1 ,
wherein the hard coating layer comprises polysilsesquioxane or an acrylic polymer material.
10. The cover window of claim 1 ,
wherein the sum of a thickness of the window substrate and a thickness of the hard coating layer has a value from about 150 μm to about 700 μm.