Glass Substrates for mmWave 5G/6G Front-End Modules

Glass-core substrates offer superior RF performance vs. organic laminates at mmWave frequencies, making them a promising solution for 5G and future 6G radio front-end modules. At millimeter wave bands, signal propagation is highly sensitive to substrate dielectric loss and dimensional variation. Conventional organic PCB laminates show increased loss and dimensional drift at high frequencies, limiting the performance of phased array antenna systems. Glass substrates feature ultra-low dielectric loss, low thermal expansion coefficient, and excellent flatness, which greatly improve signal integrity for mmWave antenna arrays. YURAY TECH has established a complete process flow for mmWave glass substrates, including fine-line patterning, thin film metallization, and surface treatment. Our test data demonstrates stable dielectric properties across wide frequency ranges, with minimal variation under thermal cycling. These glass substrates are designed for compact phased array front-end modules used in mobile terminals, base stations and satellite communication equipment. YURAY provides custom substrate design and manufacturing services to RF component manufacturers, helping 5G/6G hardware developers achieve higher antenna efficiency and smaller module form factors.