This method is similar to, though a bit more advanced than, the situation that’s currently in use on the iPhone 3GS, iPhone 4, and the iPad and iPad 2. Should you use a heavily abrasive material to scratch marks into to screen, said coating will likely be removed – also the material could be worn off after prolonged use. This new method appears to be advanced beyond anything Apple has released at the moment. Cleanliness ho!
Patently Apple describes the process thusly:
The oleophobic ingredient could be provided as part of a raw liquid material in one or more concentrations. To avoid adverse reactions due to exposure to air, heat, or humidity, the raw liquid material can be placed in a bottle purged with an inert gas during the manufacturing process.This new method’s FCC filing took place just this past February and is just popping up in the public now, so more than likely we’re not seeing the process applied to devices just yet. Time for some iPhone 5 action?
The bottle could be placed in a liquid supply system having a mechanism for controlling the amount of raw liquid material that passes through the liquid supply system. Upon reaching the vaporizing unit, the liquid could be vaporized and the oleophobic ingredient within the liquid can then be deposited on the electronic device component surface. As the liquid supply is drained from the bottle, additional inert gas is supplied in its place to further prevent contamination.