(Bloomberg) -- As investor interest in artificial intelligence sends shares of technology giants soaring, a little-known circuit board maker in South Korea is cashing in big.Most Read from BloombergTrump Cites Self Incrimination Concern in Lawsuit Against CohenQQQ Churns in Late Hours on Apple, Amazon Earnings: Markets WrapElon Musk Says Treasury Bills Are ‘No-Brainer’China Official’s Call to Save Xi’s City Angers Flood VictimsApple Surprises in China, Sets India High During Sales SlumpIsu Petas