SEOUL, Jan. 31 (Xinhua) -- Samsung Electronics, the world's largest maker of memory chips, display panels and TVs, posted the biggest operating profit in the company's history in the fourth quarter of last year, the regulatory filing showed Wednesday.

Operating profit was 15.15 trillion won (14.13 billion U.S. dollars) in the October-December quarter, up 64.3 percent from a year earlier. It marked the biggest figure ever recorded by Samsung.

Revenue reached the record quarterly high of 65.98 trillion won (61.54 billion U.S. dollars) in the fourth quarter, up 23.7 percent from a year ago.

The record earnings were mainly attributable to robust sales of semiconductors. Samsung's chip-making unit posted 10.9 trillion won (10.2 billion U.S. dollars) of operating profit on revenue of 21.11 trillion won (19.7 billion U.S. dollars).