Siward Crystal Technology Co., Ltd. is a Taiwan-based electronics company specializing in the design, manufacture, and sale of quartz crystal components. Founded in 1988 and headquartered in Taichung, the company produces a wide range of products including quartz crystals, crystal oscillators, and temperature-compensated oscillators (TCXO). Its components are widely used in applications such as telecommunications, consumer electronics, IoT devices, automotive systems, and data centers. The company serves global markets across Asia, Europe, and the Americas.