Float Zone Crystal Grower RF Heating Coil from Japan
Radio frequency induction coil for float zone crystal growers producing ultra-pure silicon ingots without crucibles. Enables zone refining for high-resistivity wafers. Counts as parts of semiconductor crystal pullers/growers in 8442.40.00.00.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include RF frequency specs (typically 300-450 kHz) and coil turns ratio for technical validation
• Water-cooling channel integrity must be certified for safe customs clearance
• Avoid bulk copper wire imports; classify only as complete semiconductor assemblies