Mobile electronic device comprising a modified sapphire
View Patent ↗An electronic device comprising a cover plate is disclosed. The cover plate comprises at least one layer of modified sapphire having a dielectric constant that is higher than the dielectric constant of sapphire.
1. An electronic device comprising a cover plate having at least one transparent display region for use in an electronic display device, the cover plate comprising at least one layer of modified sapphire having a dielectric constant greater than a dielectric constant of sapphire.
2. The electronic device of claim 1 , wherein the dielectric constant of the modified sapphire is at least about 0.05% greater that the dielectric constant of sapphire.
3. The electronic device of claim 1 , wherein the dielectric constant of the modified sapphire is at least about 0.1% greater than the dielectric constant of sapphire.
4. The electronic device of claim 1 , wherein the dielectric constant of the modified sapphire is 0.5% greater than the dielectric constant of sapphire.
5. The electronic device of claim 1 , wherein the modified sapphire is solidified from a sapphire melt containing at least one doping agent.
6. The electronic device of claim 5 , wherein the doping agent is a chloride.
7. The electronic device of claim 6 , wherein the doping agent is calcium chloride, aluminum chloride, or molybdenum chloride.
8. The electronic device of claim 5 , wherein the doping agent is a sulfide or a sulfate.
9. The electronic device of claim 8 , wherein the doping agent is aluminum sulfide, aluminum sulfate, or calcium sulfate.
10. The electronic device of claim 5 , wherein the doping agent is an aluminate.
11. The electronic device of claim 10 , wherein the doping agent is sodium alumina t e or lithium aluminate.
12. The electronic device of claim 5 . wherein the doping agent comprises iron, titanium, chromium, magnesium, gallium, or calcium.
13. The electronic device of claim 12 , wherein the modified sapphire comprises iron titanium, chromium, magnesium, gallium, or calcium.
14. The electronic device of claim 5 , wherein the doping agent is carbon.
15. The electronic device of claim 1 , wherein the modified sapphire is sapphire irradiated with hard x-rays or gamma rays.
16. The electronic device of claim 1 , wherein the cover plate has thickness between about 0.3 mm and 3.0 mm.
17. The electronic device of claim 1 , wherein the cover plate has thickness between about 0.4 mm and 2.5 mm.
18. The electronic device of claim 1 , wherein the cover plate has thickness between about 0.5 mm and 1.0 mm.
19. The electronic device of claim 1 , wherein the electronic device further comprises at least one display element having a display surface and wherein the cover plate is affixed to the display surface.
20. The electronic device of claim 1 , wherein the electronic device further comprises at least one display element having a display surface and wherein the cover plate is a protective layer removably positioned on top of the display surface.
21. The electronic device of claim 1 , wherein the cover plate further comprises an exterior anti-reflective layer.
22. The electronic device of claim 1 , wherein the electronic device is an electronic media player, a mobile telephone, a personal data assistant, a pager, a tablet, a laptop computer, or an electronic notebook.
23. The electronic device of claim 5 , wherein the modified sapphire is solidified in a crystal growth furnace.
24. The electronic device of claim 23 , where the crystal growth furnace is a heat exchanger method furnace.