Apple creates all of its own CPU and GPU designs for its mobile devices using technologies licensed from ARM Holdings and Imagination Technologies Group, but depends on other companies to fabricate the chips. Samsung has long been the go to partner, but it has been increasing the price of the contracts, causing Apple to start looking elsewhere. Taiwan Semiconductor was rumored to receive a portion of the A7 System-on-a-Chip contracts for the newest iPhone, but that never came to fruition. The latest company rumored to be involved is now GlobalFoundries, a fabrication company that spun off of AMD. The chips would be fabricated at the nearly complete Malta, NY facility which is anticipated to have the capability to manufacture 60,000 wafers per month. A conservative estimate of yield would give Apple roughly 32 million chips per month from the new facility.
Source: Daily Tech