While the sources of the rumor are given only as from the supply chain, the claim of a 30 percent thinner iPad mini seems to be an overly optimistic one. The original iPad mini measured 7.2 mm thick, and the device saw a slight increase to 7.5 mm with the move to a Retina display last year. The larger iPad Air moved in the opposite direction last year, slimming down from 9.4 mm in the fourth-generation iPad to match the Retina iPad mini at 7.5 mm.
A 30 percent reduction in thickness for the iPad mini would put it in the range of 5.25 mm, and how Apple would achieve such a reduction is unclear, especially given the increase in horsepower seen with the move to a Retina display last year. That move made the iPad Air and Retina iPad mini essentially identical with the exception of display size.
Apple is expected to release the updated iPad mini in the third quarter of 2014, likely following the iPhone 6 launch in September. Besides a possible thinner form factor and A8 processor, the next generation iPad mini also is expected to include a more durable Touch ID fingerprint sensor containing tin. Similar to the iPhone, the