KAIYUAN SECURITIES·2025-07-10 06:25Investment Rating - The industry investment rating is optimistic (maintained) [1] Core Insights - The rapid development of AI servers and high-frequency communication networks is driving the demand for large-size, high-layer PCBs and high-frequency copper-clad laminates (CCLs), leading to an accelerated iteration of PCB and CCL products [5][17] - The special glass fiber cloth market is expected to grow rapidly, with domestic manufacturers accelerating their penetration into the market [6] - Traditional glass fiber cloth prices are continuously rising, indicating a recovery in profits [7] Summary by Sections Special Glass Fiber Cloth: AI Catalyzes Demand, Domestic Manufacturers Rise - The development of AI is accelerating the upgrade of PCBs, resulting in a supply-demand imbalance for special glass fiber cloth [14] - The market for Low-Dk and Low-CTE glass fiber cloth is currently dominated by Japanese and Taiwanese manufacturers, but domestic companies are increasing their production capacity [6][31] - The demand for special glass fiber cloth is expected to significantly increase during 2025 and 2026, with several domestic manufacturers planning to expand production [6][34] Traditional Glass Fiber Cloth: In a Price Increase Cycle, Profits Continue to Recover - The average price of traditional glass fiber cloth has risen by approximately 8% from the beginning of 2025, with further upward potential [7][35] - The profitability of special glass fiber cloth is higher than that of traditional glass fiber cloth, which is expected to drive profit margins for related manufacturers [35] Investment Recommendations - With the acceleration of chip iterations and the increasing penetration of 800G switches, the demand for PCB and CCL products is expected to grow, benefiting from the performance improvements of glass fiber cloth materials [45] - Key beneficiaries in the glass fiber cloth sector include Honghe Technology and China National Materials Technology, while beneficiaries in the quartz cloth sector include Feilihua [45][46]