PHOENIX (AP) — A manufacturer of sapphire glass that Apple Inc. uses in iPhones told a bankruptcy court Friday that it wants to shut down a Mesa factory that was once touted as a big job creator for Arizona.

GT Advanced Technologies filed for Chapter 11 bankruptcy protection this week. In a bankruptcy court filing Friday, the company outlined its plans to wind down operations at the Mesa factory by the end of the year along with a second facility in Salem, Massachusetts — a move that would leave hundreds of people out of work.