HBM4 cycle faces squeeze as capacity, specs become critical

AI chipmakers' rising memory performance requirements are accelerating the shift from sixth-generation high-bandwidth memory (HBM4) to HBM4E, according to analysis of the South Korean supply chain. Major AI semiconductor customers are already pushing HBM4E development, potentially shortening HBM4's mass-production cycle, while suppliers' development and manufacturing capabilities, thermal management, and customer validation remain decisive.