TabletPC glass as well as handyphone glass is better with greater strength
New approaches to invisibility from curving light around an object have been appearing quite frequently.
Using invisibility approaches like flow around gradient refractive index material or negative index refractive materials like microcolumn arrays this technology just curves light around a microfine mesh of hyperstrong material like osmium metal or possibly a carbon polymer.
super tech kudos if they place the mesh between the active elements at the display matrix so it tends to be invisible anyway.
This is a Public domain idea from a few hours ago.-- beanangel, May 07 2013 one of many articles on invisibility optics http://www.newscien...sibility-cloak.html [beanangel, May 07 2013] electromagnetic Lorentz coin squishing http://www.youtube....watch?v=e4W7VBl5mEg [beanangel, May 07 2013] another approach to superstrengthening tempered glass could be using doped Si at glass to make it conductive to induced electromagnetic fields
Then induce a giant magnetic field, like the kind at electromagnetic coin squishers (link) while the glass cools to create orders of magnitude stronger tempered glass.
Further you could shape the microareas of conductive silicon differently (antenna patternization) so they absorbed different RF frequencies, thus adjusting the amount of EM coin squish energy to be different at different areas of the glass, so the sides could be hyperstrong along certain lines with the major surface strong at particular ways-- beanangel, May 07 2013 Isn't osmium dangerous?-- leinypoo13, May 08 2013 Dunno, but it is REALLY heavy; probably ot the best material to use in any great quantity in a hand-held device.-- neutrinos_shadow, May 09 2013 I want to understand this so badly... and in a way, I guess I do.-- 2 fries shy of a happy meal, May 10 2013 Its compounds are toxic, but the pure metal is quite inert. I don't know if it's hyperstrong, though. It's very hard, but that's not the same thing.-- spidermother, May 10 2013 The issue being that "invisibility" metamaterials only work in a very narrow frequency range, and (AFAIK) none have been designed that can work in frequencies high enough to see; they're more radio or occasionally IR. In fact, it's pretty much impossible to route something as broad-spectrum as visible light around anything.
Also, they tend to be fairly bulky. The glass will likely be significantly larger than the smartphone itself.-- Hive_Mind, May 12 2013 I'd prefer putting your magical invisibility material around the entire phone, so I could talk on the phone without people noticing. Don't mind me, my (apparent) rant to no one, or this weird blur by my right ear.-- sninctown, May 12 2013 random, halfbakery