Four major electronics makers may ask the government to impose punitive duties on what they call unfairly cheap semiconductor imports from South Korea, industry sources said Wednesday.

NEC Corp., Hitachi Ltd., Toshiba Corp. and Mitsubishi Electric Corp. believe South Korean manufacturers are exporting dynamic random access memory chips at unfair prices to expand their market share here, the sources said. The chips are key components of personal computers and mobile phones.

Should domestic chip makers formally file a dumping charge against their South Korean rivals, the government will handle the case in accordance with World Trade Organization rules, an official of the Ministry of Economy, Trade and Industry said Wednesday.