After logging losses for five consecutive quarters, Samsung Electronics' chip business returned to the black in the first quarter this year, thanks to rising demand for high-end chips and a surge in chip prices. In its earnings report for the January-March period on Tuesday, Samsung said its chip division reported 23.1 trillion won ($16.7 billion) in sales and 1.91 trillion won in operating profits. The profit comes after the company suffered operating losses for five consecutive quarters. In 20