Chinese quartz approved for semiconductor equipment and DRAM manufacturing, but it still can’t break America’s monopoly — China secures domestic supply for chip
Pacific Quartz has supplied Lam Research and Tokyo Electron with ultra-high-purity quartz consumables, such as LPCVD diffusion tubes, wafer boats, quartz ingots, quartz plates, and high-purity quartz tubes, since 2019–20…









