By Noel Randewich SAN FRANCISCO (Reuters) – Intel Corp , hit by slumping personal computer sales, has put off opening a major chip factory that President Barack Obama once held up as an example of U.S. manufacturing potential. The Fab 42 facility built in Chandler, Arizona, originally slated as a $5 billion project that in late 2013 would start producing Intels most advanced chips, will remain closed for the foreseeable future while other factories at the same site are upgraded, said Intel spokesman Chuck Mulloy. Intels decision not to open the chip plant was first reported by the Arizona Republic on Tuesday. Despite not opening the new factory, or fab, Intel has exceeded a target to hire over 1,000 employees since construction started in 2011, Mulloy said.