Boule and wafer production (848610) covers crystal-growing furnaces, wire saws, and polishing equipment that convert raw silicon into finished wafers. Semiconductor device fabrication (848620) covers the downstream lithography, etching, deposition, and ion-implantation tools that pattern those wafers into circuits. The distinction is the stage of the manufacturing process, not the physical form of the machine.

These machines are not subject to a blanket trade-remedy measure, but individual lines may be affected by Section 301 actions depending on country of origin. Separately, many advanced lithography and deposition tools are subject to export-control classifications (EAR/ECCN) in the US and analogous controls in supplier countries such as Japan and the Netherlands, which can affect re-export and technology-transfer compliance.