Apple may be mulling to replace aluminium by carbon fiber as main material for the chassis of its next iPad 2 tablet according to a patent that has been discovered last week.
Under the title "Reinforced Device Housing", the patent shows that Apple may want to introduce a lighter enclosure for the iPad (or at least a device that looks terribly like one) made of CFRP (Carbon Fiber Reinforced Plastic).
Swapping Aluminium also means that the device will get improved Wi-Fi and 3G connection. Whether or not Apple will introduce CFRP for other devices like the iPhone 5 or the iPod Touch 5G remains to be seen.
That said, we are not sure how much weight can Apple shave off the iPad by changing the shell's material. Surely there's more to be gained by changing the glass screen for something else.
Head to the Register for more technical details and some illustrations on how the chassis (or at least the back of the device) may be built.