Since the announcing in March 2009 that it would close the fab, Fairchild has more than doubled its sales of the high voltage and automotive products built at the Mountain Top fab, Fairchild said. The company said it expects to continue the rapid expansion of these businesses and determined that retaining the Mountain Top facility would be essential.

"The strong growth of the product lines supported by the dedicated employees at our Mountain Top facility enabled us to make today’s announcement," said Mark Thompson, Fairchild's president, chairman and CEO, in a statement. 

Fairchild's Mountain Top fab has been in operation since 1960. The 200-mm fab currently employs more than 220 people, according to Fairchild.