Float Zone Crystal Grower RF Coil from Japan
Radio frequency induction coil used in float zone furnaces for producing high-purity silicon crystals from polycrystalline rods, specific to 8472.90.50 machines. It generates the molten zone for zone refining without crucibles. Classified in HTS 8473.40.41.00 for semiconductor processing equipment parts.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Include engineering drawings showing coil dimensions matched to float zone chamber geometry
• Certify RF frequency specs (typically 300-500kHz) exclusive to semiconductor crystal growth
• Avoid misclassification by documenting exclusion of crucible-based Czochralski systems