Precision Copper Balls for Float Zone Crystal Grower Bearings from Japan
High-purity copper alloy balls for vacuum bearings in float zone crystal growers that produce semiconductor boules from polycrystalline silicon rods. Classified under HTS 8482.91.0015 due to statistical note 6 designation for copper alloy balls in semiconductor material growth equipment. Essential for precise rotation control in ultra-clean processing.
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 technical specs showing tolerance levels (e.g
• sphericity <1μm) proving semiconductor-grade precision
• Submit end-user statements confirming incorporation into statistical note 6 equipment
• Verify RoHS compliance documentation for cleanroom certification