Float Zone Crystal Grower RF Heating Coil
RF heating coil used in float zone crystal pullers to melt and zone-refine semiconductor boules like silicon for ultra-pure wafers. Classified under HTS 8431.49.90.94 as a principal part for heading 8429 crystal growth furnaces in semiconductor manufacturing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If marketed as standalone RF generator without machine specificity
General electric heaters or inductors without principal dedication to 8429 machinery classify under heading 8516.
If for interchangeable parts of broader industrial ovens
Non-specific machinery parts fall into 8487 basket provisions.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide technical drawings proving sole use in float zone machinery of 8429; declare RF frequency specs for customs scrutiny; avoid pitfalls by excluding general-purpose coils which shift to 8515
Related Products under HTS 8431.49.90.94
CMP Polisher Retaining Ring
Consumable retaining ring holding wafers in place during chemical-mechanical polishing for semiconductor devices.
Crystal Puller Seed Chuck Holder
Holder for seed crystal in Czochralski pullers initiating boule growth for semiconductor wafers.
Wafer Grinder Air Bearing
Air bearing spindle support for vibration-free grinding of semiconductor wafers.
Float Zone Puller Vacuum Chamber Lid
Sealable lid for vacuum chamber in float zone semiconductor crystal growth furnaces.
Czochralski Crystal Puller Furnace Chamber
The furnace chamber is a critical replaceable part for Czochralski crystal growers used in semiconductor wafer manufacturing, containing the high-temperature environment for pulling monocrystalline silicon boules. It falls under HTS 8431.49.90.94 as a part solely for machinery of heading 8429 (industrial ovens and furnaces). This statistical note component ensures precise crystal growth per semiconductor processing standards.
Semiconductor Crystal Boule Grinder Chuck
Precision vacuum chuck for holding crystal boules during grinding to exact wafer diameters, as per statistical note (a)(ii)(A) for wafer prep equipment. HTS 8431.49.90.94 covers it as a part for heading 8430 grinding machines dedicated to semiconductor processing.