The announcement comes a day after the world's largest maker of microprocessors used in personal computers slashed prices on a number of its chips and a week after it reported a decline in fourth-quarter revenue.

Intel said it would close two assembly test facilities in Penang, Malaysia, and one in Cavite, Philippines.

It will also halt production at a wafer fabrication facility in Hillsboro, Oregon, as well as its Santa Clara, California plant -- a factory connected to its headquarters and the only one left in Silicon Valley.

The actions will result in a reduction of 5,000 to 6,000 jobs, Intel said. It ended 2008 with around 84,000 employees.

Not all cuts at the affected plants will lead to job losses and some workers will be offered positions at other facilities, it said, adding that the restructuring will take place between now and the end of 2009.

"It's not a surprise given that their first quarter is probably going to be challenging, and they're trying to do what they can to cut costs in places that make sense," said Taunya Sell, an analyst at Ragen Mackenzie, a division of Wells Fargo.

Intel said it was not halting production at any of its more advanced factories.

Intel shares rose about 1 per cent to $13.40 in after-hours trading, after rising 3.11 per cent to close at $13.26 on the Nasdaq stock market.

Last week, Intel said its fourth-quarter revenue fell 23 per cent from the year-ago period and profit tumbled 90 per cent. It also held back on giving detailed quarterly forecasts, citing economic uncertainty.

Analysts have been wary about Intel's outlook for the year as chip sales slide. PC makers and other technology companies have been trimming inventory and cutting back on purchases.

Intel also faces competition from new, cheaper chips made by Advanced Micro Devices Inc.

On Tuesday, Intel said it was lowering prices on some of its processors, including price cuts of up to 40 per cent on some of its higher-powered, faster quad-core chips.