Chinese nuclear scientists have developed a world-class “microscopic scalpel” essential to various forms of chipmaking, potentially unblocking a bottleneck in the country’s efforts to fortify key supply chains. The China Institute of Atomic Energy said on Saturday that it had developed the nation’s first high-energy hydrogen ion implanter called the POWER-750H, saying it performed on a par with advanced international standards. Ion implanters are a critical part of some forms of semiconductor...