BOE, Corning Partner on AI Glass Substrates; Sector Stocks Surge

BOE Technology (000725.SZ) and Corning Inc. (GLW) signed a memorandum of understanding on June 1, 2026, to jointly develop glass substrates for chip packaging, sparking a sharp rally in their shares and related stocks on June 2. BOE later issued a risk notice, stating the project is only at an early cooperation stage with no mass production yet. The deal highlights the semiconductor industry’s accelerating shift toward glass-based packaging, driven by AI chips’ escalating power and size requirements that strain conventional plastic substrates. Intel, Samsung, and TSMC are all pushing similar initiatives, aiming to replace Ajinomoto’s long-dominant ABF film with glass to improve signal integrity, thermal stability, and wiring density. Corning recently expanded fiber optic production capacity with Nvidia for AI data centers. Glass substrate yields currently range from 75% to 85%, below mature plastic’s 90-95%, keeping costs elevated. Industry observers see 2026 as a pivotal year for mass production validation, with BOE’s move marking China’s entry into the advanced packaging race.