FLH331是由合成砂制成的石英材料，具有纯度高、少气泡，无包裹体、透过率高、耐刻蚀、耐高温等特性。
可运用于半导体先进制程、光学、化学加工、紫外线和高温窗口等。

FLH331 is a quartz material made of synthetic sand. Thanks to the high purity, few bubbles, no inclusions, high transmittance, etching resistance, high temperature resistance and other characteristics，FLH331 could be used in advanced semiconductor manufacturing process, optics, chemical processing, ultraviolet and high temperature windows,etc.