South Korean suppliers win HBM4 tester orders from SK Hynix

South Korean test-equipment suppliers Digital Frontier and UniTest have secured four orders for HBM4 wafer testers from SK Hynix worth a combined KRW247.84 billion (approx. US$172 million) in 2026, expanding domestic vendors' role in a memory-testing segment where Japan's Advantest has long been an established supplier.