The Decmeber figure was up 1.52 percent from a year earlier, the company said.
For 2005, UMC, the world's second largest contract microchip maker, posted NT$90.78 billion in sales, down 22.62 percent, it added.
In the fourth quarter to December, UMC's sales rose to NT$27.47 billion from NT$23.58 billion in the third quarter, the company said.
Taiwan Semiconductor Manufacturing Co., the world's largest contract microchip maker, said yesterday its sales in December fell 0.4 percent from November.
TSMC posted NT$27.42 billion in December sales, compared with NT$27.52 billion in November, the company said. The December figure was up 37.6 percent from a year earlier, it said.
For 2005, TSMC's sales rose to a record NT$264.59 billion, up 3.4 percent, the company said.
In the fourth quarter to December, TSMC's sales stood at 81.16 billion dollars, compared with its October 27 forecast of NT$77 billion to NT$79 billion, and NT$69.26 billion registered in the third quarter, it added.
Chunghwa Telecom said yesterday it has pledged not to lay off employees or cut their salaries for the coming five years during the normal course of its business.
The company made the commitment in a collective bargaining agreement signed with its workers' union Friday.
The state-owned company, which has some 28,000 employees, is 42-percent owned by the government which has been steadily reducing its stake as part of a long drawn out privatization process.
China Steel Corp., Taiwan's largest steelmaker, said yesterday it will invest more than NT$30 billion over four years to upgrade its facilities in the face of increasing competition. "With competition getting fiercer and fiercer, China Steel has to target a niche market. The company is planning investments to manufacture value-added products and upgrade production quality by 2010," company executive vice president L.M. Chung said.
The planned value-added items include reinforced and light-weight steel plates for auto manufacturing and other products for industrial motor use, Chung said.
The quality of hot rolled and cold rolled steel will also be improved, he added. Current annual production of hot rolled steel totals eight million tons and cold rolled steel exceeds 3.3 million tons.
China Steel, some 23 percent held by the government, faces competition from petrochemical conglomerate Formosa Plastics Group which plans to build a NT$140 billion steel mill with annual production of 7.5 million tons.
In the nine months to September, China Steel posted a net profit of NT$45.75 billion, up 23.9 percent from a year earlier, on rising international steel prices and cost controls.