Threat to 200 jobs at RFMD factory in Newton Aycliffe
Up to 200 jobs are at risk after a US-based electronics firm announced plans to end production at its main UK facility in County Durham.
RF Micro Devices (RFMD) has made semi-conductors for mobile phones at a factory in Newton Aycliffe since 2008.
But the North Carolina-based firm said it planned to switch production back to the US to save $20m (£13m) a year.
The company's decision was described by Business Durham as "very disappointing".
RFMD, which operates from the former Filtronic microchip plant at Heighington Lane Business Park, said it hoped to find a buyer for the plant in the next 12 months.
In a statement, the firm said it planned to use a lower-cost production process at its Greensborough headquarters.
Stewart Watkins, managing director of Business Durham, which works with Durham County Council on attracting investment into the area, said: "Obviously this is very disappointing news for Newton Aycliffe.
"The company is actively seeking a buyer and the council will be offering the services of Business Durham to assist RFMD in attracting an investor to the site.
"RFMD is a flagship facility for the county and its highly skilled workforce will be an asset to its successor."