Crystal Grower Crucible Rotation Mechanism
A motorized rotation drive for quartz crucibles in Czochralski crystal pullers, ensuring uniform dopant distribution during silicon ingot growth. It is critical for consistent resistivity across the boule diameter. This mechanism is a part of the goods of tariff item 8479.89.10.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a standalone electric motor
If the rotation mechanism is essentially just an electric motor without the specific mounting or control features for a crystal puller, it could be classified as a motor.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Document that the rotation mechanism is specifically designed for crystal pullers
• Ensure the motor and drive components are included as a single unit for classification
• Verify if any electrical components require CSA certification for Canadian import
Related Products under Tariff item 8479.90.19
Boule Grinder Diameter Gauge
An in-process laser diameter measurement gauge used with crystal boule grinders. It provides real-time feedback to CNC controls to ensure wafers cut from the boule meet SEMI diameter tolerances. This is a part of the goods of tariff item 8479.89.10, which covers crystal grinders.
Crystal Boule Grinder Spindle
A high-precision spindle assembly for crystal grinders that shape semiconductor boules to exact wafer diameters and grind orientation flats. It is critical for diameter control and flat marking per conductivity specifications. This spindle is a part of the goods of tariff item 8479.89.10.
Crystal Puller Seed Clip Holder
A high-temperature seed crystal holder for Czochralski pullers that dips the seed into the silicon melt to initiate controlled boule growth. It is made from specialized molybdenum alloys. This holder is a part of the goods of tariff item 8479.89.10.
Czochralski Crystal Puller Heater Assembly
A replacement heater coil assembly for Czochralski crystal pullers used in growing monocrystalline silicon boules for semiconductor wafers. It maintains precise temperatures during the crystal growth process. This heater is a part of the goods of tariff item 8479.89.10.
Float Zone Crystal Grower RF Coil
A radio frequency induction coil replacement part for float zone crystal growers that produce high-purity silicon crystals for semiconductor wafers. It is essential for localized melting in the zone refining process. This coil is a part of the goods of tariff item 8479.89.10.
Lapper Slurry Flow Controller
A precision flow control valve assembly for wafer lapping machines that regulates nanoliter/minute slurry delivery for consistent material removal rates. It maintains bow/warp specifications. This valve is a part of the goods of tariff item 8479.89.10.