Factory sapphire crystal, is the new challenge from Apple

The plant will have more than 700 workers and Apple use the sapphire glass for their cameras and fingerprint sensor for the new iPhone 5s.

Apple built in the United States, in the state of Arizona, a factory for the production of sapphire crystal, a transparent material of high strength, said his partner GT Advanced Technologies.

The question is why Apple has now opted for material production in Mexico, and that all equipment used in are manufactured in Asia and does not seem entirely logical that the parts are shipped from the USA.

Therefore, the factory could point to a future product launch that was made entirely in the U.S., such as a computer watch. The sapphire crystal is widely used in watches.

It is the second step of Apple to manufacture in its home market, after the new Mac Pro Professional computer, which goes on sale in December and is produced in Texas.

However, the device, which will cost at least $ 3,000, is no mass product.

Also its competitor Google is testing occur in the U.S., also in Texas, Moto X smartphone from Motorola subsidiary. However, most of the components come from Asia.