Display for mobile device with abrasion resistant siloxane coating
View Patent ↗An abrasion resistant coating is applied to a display of a mobile device. In an embodiment, the coating includes a first layer including siloxane; a second layer including siloxane, wherein the second layer has opposing sides and a hardness greater than the first layer; and a third layer including an amorphous carbon selected from a diamond-like carbon and a diamond-like nano-composite. The first layer and third layer are positioned on opposing sides of the second layer. The third layer has a hardness greater than the second layer.
1. A display device comprising:
a display and touch screen assembly;
a substrate covering the display and touch screen assembly;
a siloxane layer comprising a siloxane-organic interpenetrating network contacting the substrate, the siloxane layer having a hardness greater than a hardness of the substrate;
another siloxane layer comprising a siloxane-organic interpenetrating network contacting the siloxane layer, the another siloxane layer having a hardness greater than the hardness of the siloxane layer, the siloxane layer and the another siloxane layer having a combined thickness of at least 20 microns; and
a diamond-like nano-composite layer comprising an amorphous carbon and a siloxane contacting the another siloxane layer, the diamond-like nano-composite layer having a hardness greater than the hardness of the another siloxane layer.
2. The display device of claim 1 , wherein the device is a phone.
3. The display device of claim 1 , wherein the substrate is a co-extrusion of poly(methyl methacrylate) and polycarbonate.
4. The display device of claim 1 , wherein the substrate is a plastic lens.
5. The display device of claim 1 , wherein the substrate is affixed to a plastic lens.
6. The display device of claim 1 , wherein the substrate is affixed to a touch screen and display assembly.
7. The display device of claim 1 , wherein the siloxane layer and the another siloxane layer have a combined thickness of less than 75 microns.
8. The display device of claim 1 , wherein the diamond-like nano-composite layer is applied to the siloxane layer by a chemical vapor deposition process.
9. The display device of claim 8 , wherein the chemical vapor deposition process is selected from ion beam plasma enhanced chemical vapor deposition and plasma enhanced chemical vapor deposition.
10. The display device of claim 1 , wherein the siloxane layer comprises an interpenetrating network of a siloxane and an acrylic.
11. The display device of claim 1 , wherein the siloxane layer comprises from 25 wt. % to 50 wt. % siloxane.
12. The display device of claim 1 , wherein the another siloxane layer comprises an interpenetrating network of a siloxane and an acrylic.
13. The display device of claim 1 , wherein the another siloxane layer comprises from 10 wt. % to 25 wt. % siloxane.
14. The display device of claim 1 , wherein the siloxane layer has a hardness from 20 Vickers to 200 Vickers.
15. The display device of claim 1 , wherein the another siloxane layer has a hardness from 100 Vickers to 250 Vickers.
16. The display device of claim 1 , wherein the siloxane layer has a thickness from 20 microns to 50 microns.
17. The display device of claim 1 , wherein the another siloxane layer has a thickness from 5 microns to 25 microns.
18. The display device of claim 1 , wherein the amorphous carbon is an amorphous hydrogenated diamond-like carbon.
19. The display device of claim 1 , wherein the diamond-like nano-composite layer has a hardness of 400 Vickers or greater.
20. The display device of claim 1 , wherein the diamond-like nano-composite layer has a thickness between 3 microns and 20 microns.