Hynix posted a 172-billion-won (170-million-dollar) operating loss over the three months to June, an improvement from a 482-billion-won loss in the previous quarter.
In the second quarter of 2007, Hynix posted a 109-billion-won operating profit.
Hynix shares rose 2.6 percent to around 21,650 won after falling for the past four trading days.
Second-quarter sales revenue was 1.86 trillion won, up 16 percent from the previous quarter, mainly thanks to increased shipments of memory chips and higher average selling prices.
But the net loss for the quarter surged to 711 billion won, or 38 percent of sales revenue, compared with a 676-billion-won loss in the previous quarter.
The net loss was much wider than the operating loss as it factored in the costs of the closure of an unprofitable US factory and foreign exchange losses caused by a weak South Korean won.
Hynix said the closure of the plant in Oregon state would help improve the company's future cash flow.
Through alliances with foreign and domestic firms, Hynix plans to step up efforts to develop new technology and advance into new business areas such as solar cells and chips for automobiles.
