5-2-6 CoWoS's Hidden Defense Line: The US-Japan Chemical Chokehold Battle and Wah Lee (3010), Hong Teng (7751)'s Cutting-Edge Thermal Management Technology
US/Japan monopolize CoWoS packaging's underfill & TIMs, essential for AI chip stability, thermal limits, and yield. Distributors like Wah Lee & Chang Hwa, with strict cold chain & local support, build moats as indispensable advanced process gatekeepers, given high replacement costs.